2016 | 69/2 | 187–194 | 4 Figs. | 1 Tab. | 1 Pl. | www.geologia-croatica Journal of the Croatian Geological Survey and the Croatian Geological Society

Cretaciclavulina gusici n. gen., n. sp. (?family BERTHELIN, 1880), a new larger benthic foraminifer from the lower Campanian of Brač Island, Croatia Felix Schlagintweit1 and Blanka Cvetko Tešović2

1Lerchenauerstr. 167, D-80935 München, Germany; (corresponding author: [email protected]) 2University of Zagreb, Faculty of Science, Department of Geology, Horvatovac 102a, Zagreb, Croatia; ([email protected]) doi: 10.4154/gc.2016.17

Article history: Abstract Manuscript received August 19, 2015 The larger benthic Cretaciclavulina gusici n. gen., n. sp. is described from the lower Revised manuscript accepted March 30, 2016 Campanian Pučišća Formation of the Island of Brač, Croatia. With its elongate test, trochospiral Available online June 1, 2016 to uniserial coiling, simple chambers, paraporous wall structure, and areal aperture provided with a cribrate apertural plate, Cretaciclavulina is tentatively placed into the family Valvulinidae BERTHELIN, 1880. Besides Neobalkhania bignoti CHERCHI, RADOIČIĆ & SCHROEDER, 1991,

Keywords: Benthic foraminifera, Wall structure, Fleuryana adriatica DE CASTRO, DROBNE & GUŠIĆ, 1994, and Reticulinella fleuryi CVETKO, Valvulinidae, Palaeotextulariidae, Upper GUŠIĆ & SCHROEDER, 1997, Cretaciclavulina gusici represents the fourth benthic foraminifera Cretaceous, Croatia newly described from the Upper Cretaceous shallow-water carbonates of Brač Island.

1. INTRODUCTION diterranean region (the former central Tethys; present-day peri- The Upper Cretaceous shallow-water limestones of the Periadri- Adriatic area). The ADCP was the largest of these platforms with atic Region (Adriatic, Apenninic, and Apulian carbonate plat- relatively well preserved, mainly shallow-marine successions oc- forms) contain a rich fauna of large-sized benthic foraminifera, casionally interrupted by episodes of emersion or drowning. many of them with special biostratigraphic importance (e.g., From the Pučišća Formation of Brač Island, three benthic for­a­ TORRE, 1966; LUPERTO SINNI, 1976; DE CASTRO, 1974; minifera have already been introduced from thin-section mate­rial: CVETKO TEŠOVIĆ et al., 2001; KORBAR & HUSINEC, 2003; Neobalkhania bignoti CHERCHI, RADOIČIĆ & SCHROEDER, VELIĆ, 2007; CHECCONI et al., 2008; FRIJIA et al., 2015). In 1991, Fleuryana adriatica DE CASTRO, DROBNE & GUŠIĆ, the Croatian part of the Adriatic-Dinaridic carbonate platform, a 1994, and Reticulinella fleuryi CVETKO, GUŠIĆ & SCHROEDER, shallow-water facies rich in benthic foraminifera known as the 1997. Another new taxon is reported here is Cretaciclavulina gusici Pučišća Formation was originally described from the island of n. gen., n. sp. Brač (GUŠIĆ & JELASKA, 1990). The island of Brač is situated along the central part of the Adriatic-Dinaridic Carbonate Plat- 2. GEOLOGICAL SETTING form (ADCP; cf. JENKYNS, 1991; GUŠIĆ & JELASKA, 1990; PAMIĆ et al., 1998; JELASKA, 2002) or Adriatic Carbonate Plat- 2.1. Lithostratigraphy form (AdCP; cf. VLAHOVIĆ et al., 2005). During the Mesozoic, On the Island of Brač, situated along the central part of the Croa- several long-lived isolated carbonate platforms existed in the Me­ tian Adriatic coast (Fig. 1), an almost complete, relatively undis-

Figure 1. Map showing the location and geology of Brač Island, and type locality of Cretaciclavulina gusici n. gen., n. sp. (modified after GUŠIĆ & JELASKA, 1990, CVETKO TEŠOVIĆ et al., 2001 and STEUBER et al., 2005). Geologia Croatica six lithostratigraphic six units (PEJOVIĆlithostratigraphic & RADOIČIĆ, 1987; GU into subdivided been has succession 1990). The JELASKA, & predominantly of small-scale shallowing-upward cycles (GUŠIĆ succession(up1500 to m), „layer-cake”consisting sedimentary coast of the the islandsoutheastern (Fig. 1). presentoutcrops, along alongas scattered and, the northwestern velopment of the ADCP (Figs. 1, 2). Palaeogene deposits are also de shallow-water carbonate Cretaceous Upper the forexample ADCP is exposed. This succession the has of served as a succession representative Cretaceous Upper well-exposed and turbed, tion (adapted from GUŠIĆ & JELASKA, 1990, CVETKO TEŠOVIĆ et al., 2001 and STEUBER et al., 2005). Figure 2. 188 The The Upper Cretaceous platform limestones represent a thick Stratigraphic synthesis of the Upper Cretaceous deposits of Brač Island with detailed lithology and selected foraminiferal assemblage of Pučišća Forma - ­ Maastrichtian (Fig. Maastrichtian 2): 1990), JELASKA, & ŠIĆ – – planktonic foraminifera and calcispheres drown and indicate foraminifera planktonic with wackestones skeletal pelagic comprises Turonian) The Sveti Duh Formation (uppermost Cenomanian–Lower 2012). al., et KORBAR 1990; JELASKA, & (GUŠIĆ breccias nites, occasional slump mollusca) features, and rare intraformational other and wackestones with alternate microbial to grainstones lami rudists foraminifera, (including Formation(Cenomanian) bioclastic Milna comprises The ranging in age from Cenomanian to to Cenomanian from age in ranging Geologia Croatica 69/2 Croatica Geologia ­ - - Geologia Croatica

------189 CAUS CAUS is tenta Based on n. gen., n. sp. n. gen., n.

Cretaciclavulina gusici Cretaciclavulina Cretaciclavulina with some representatives of displays closely spaced, fine Calveziconuslecalvezae D’ORBIGNY. n. gen, n. sp. were only observed in 15 15 in observed only were sp. n. gen, n. Composite name referring Composite to the Cre Cretaciclavulinagusici n. gen. n. Cretaciclavulina Cretaciclavulina The wall structure combined with the elongate With With its test,elongate trochospiral later becom Test elongate, trochospiral (most likely triserial) likely trochospiral(most elongate, Test Remarks: Remarks: Remarks: The wall of Type species: species: Type Origin name: the of Diagnosis: Cretaciclavulina gusici Cretaciclavulina 4.MICROPALAEONTOLOGY taxon new the of Description 4.1. 1826 D’ORBIGNY, Foraminifera Phylum: 2013 al., et PAWLOWSKI Class: 1958 FURSENKO, Ataxophragmiina Order: 1838 EHRENBERG, Superfamily: 1880 BERTHELIN, Family:?Valvulinidae ing uniserial, chambers, a paraporousthe simple wall structure, and cribrateprobable apertural plate, Valvuli the tively placed into the family 181), Valvulinidae BERTHELIN, p. 1880. (1987, TAPPAN & LOEBLICH to According Holocene. the to fromnidae Palaeocene the in range age stratigraphic and palaeoecologic aspects. The Late (but not latest) latest) not (but Late The aspects. palaeoecologic and stratigraphic the on based largely is PučišćaFormation the Campanianof age age determination of the Brač „Marble” stratigraphic gave priority and to the relevant JELASKAMember. (1990) GUŠIĆ & sidero and benthicforaminiferalarger well-studied (orbitoidids litids). Based on numeric ages derived from strontium-isotope rudist of calcite STEUBER shells, low-Mg of stratigraphy (SIS) et al. (2005) revised the chronostratigraphy of the Coniacian–Accord Brač. of island the of carbonates Maastrichtian platform Pučišćathe Formation strontium-isotopethestratigraphy, toing is mid-Santonian to late Middle Campanian in age. foraminifera,­benthic especially containing samples the CORNELLA, & revised (see Campanian lower the to assigned be can sp. n. gen. n. FRIJIA rangesof 2015). al., et REPOSITORY AND MATERIAL 3. Pučišća the from samples of analysis micropalaeontological The Formation was performed on about 200 thin sections. Sections of them. of The areinvestigated samples the property the of Croa numbers: (inventory repositorytheir and Survey Geological tian De Geological-Palaeontological the in currently is 10807−10815) partment of the Croatian Natural History Museum, Demetrova Croatia. Zagreb, 1, test and its trochospiral its testand uniserialto arrangementchamber allow a comparison of Valvulinidae 1933, PalaeotextulariidaeGALLOWAY, family the BERTHELIN, as well 1880, as and 1911 CUSHMAN, Verneuilinidae partly 1877, also SCHWAGER, the Ataxophragmiidae 3A). (Fig. 1985 TAPPAN, & PseudogaudryinidaeLOEBLICH and more or less parallel, more rarely shortly bifurcating blindly end canaliculi but or exterior, the to open not are that parapores Cretaciclavulina taceous genus theand to uniserial, stage triserial the with in enlarging a short low, intermediate broad simple, Chambers biserial these. stage between ag thick Wall uniserialstage. the in width constant nearly of and inner an with possibly (paraporous), canaliculate and glutinating, interiomarginalin single Foramen layer. (?aragonitic) calcareous the trochospiral and areal in the uniserial part. Aperture areal, cribrate witha apertural provided plate. ------­ ­ ­ ­ŠO n. gen., n. sp. (?family Valvulinidae BERTHELIN, 1880) ... of the Cretaciclavulina gusici two superpositional-lateral subunits in detail including taxonomic, phylogenetic,

the „Gračišće Oncolite” Member) during the Late Late the during Member) Oncolite” „Gračišće the e.g. ditions with subaerial erosion at the top, probably reflecting reflecting probably top, the at erosion subaerial with ditions Campanian). Late to Middle the in level sea of drop global a SumartinCampanian–Maastricht(UpperThe Formation the of Maastrichtian,represents ian) the cycles regressive deposited were which emersion, Campanian Late the above inperitidal environments. sented by the floatstones bioclastic biostromes, (rudist member Rasotica to rudstones and foraminiferal wackestones/packstonesimper benthic larger of assemblages diverse and rich with (uppermost member Lovrečina the and foraminifera) forate shallowing- developed regularly characterized by member con emergence indicating features with sequences upward platform sediments with rudists in parautochthonous posi parautochthonous inrudists with sediments platform tion and bioclastic shallow-water limestones indicate the the as known trough, intraplatform the gradualof infilling plat the of progradation the With Member. „Marble” Brač form, the protected back-margin environments gradually occupied larger areas until they completely overlaid the Brač „Marble” Member. These environments are repre low-water benthicorganisms. low-water The Dol Formation (Coniacian–Lower Campanian) com planktonicand calcispheres abundant withmicrites prises foraminifera indicating a second Late Cretaceous pelagic episode. The Pučišća Formation (Santonian–Middle Campanian): The Gornji Humac Formation (Upper Turonian–Lower Campanian) comprises oncoid-bearing beds in the lower ( part pela underlying the cap which Coniacian, Turonian–Early gic deposits and evidence a shallowing and reinstallation gradually were which environments, platform carbonate of shal of populations for favourable more and restrictive less ing of the ADCP (JENKYNS, 1991; GUŠIĆ & JELASKA, & GUŠIĆ 1991; (JENKYNS, ADCP the of ing 2012). al., et KORBAR 1999; JENKYNS, & DAVEY 1990; The Pučišća Formation contains especially rich assemblages assemblages rich especially contains Formation Pučišća The The new benthic foraminifer Thenew described paperin present the – – – – – – – ŠIĆ & JELASKA (1990), but their litho- and chronostratigra and litho- their but (1990), JELASKA & ­ŠIĆ VIĆ et al., CVETKO 2001). TEŠOVIĆ et al. described(2001) these assemblages nifera in the Brač „Marble” Member. These assemblages were used for the interpretation of stratigraphic and palaeoenviron & JELASKA,CVETKO TEmental features 1990; (GUŠIĆ of larger benthic foraminifera dominated by various imperforatevarious foraminiferaby dominatedbenthic larger of forami hyaline and members Lovrečina and Rasotica the in taxa per Cretaceous succession of Brač (POLŠAK et al., 1982; GUŠIĆ GUŠIĆ 1982; al., et (POLŠAK Brač of succession Cretaceous per KORBAR, 2001, al., et TEŠOVIĆ CVETKO 1990; JELASKA, & type the and therein) references and 2005 al., et STEUBER 2003; island. taxathe on several are located of localities mation boundaries (Fig. 2) and been subdivided have some microfossils benthic of and them intobivalves Rudist units. smaller as biostratigraphic the up markers for studied comprehensively GU RADOIČIĆ & interpretation phic PEJOVIĆ differs fromof that for some characterdiachronousof the emphasized They (1987). 2.2. Biostratigraphy 2.2. PEJOVIĆ & RADOIČIĆ (1987) subdivided the Upper Creta fora benthic on based mainly formations six into deposits ceous minifera and rudists. Six formations were also recognized by of of the Gornji Humac and are more frequent in the Pučišća For (Rasotica mation Lovrečinaand members). was was observed in the Campanian deposits of the uppermost part Felix Schlagintweit and Blanka Cvetko Tešović: Geologia Croatica France (from LOEBLICH & TAPPAN, 1987, pl. 191, fig. 1). Scale bars = 0.3& mm. LOEBLICH ­TAPPAN, (from 1987, USA pl. 196, Texas,fig. 3). of H) (Campanian) Cretaceous Upper DESAI, & (from LOEBLICH & TAPPAN, 1987, pl. 201, fig. 3), F) G) 3). fig. d´ORBIGNY,Middle Eocene of France (from LOEBLICH & TAPPAN,1987, pl. 200, Islands(fromLOEBLICH & TAPPAN, 1987,pl.200, fig. E)6). 1997,Fig. 1/40 ) 3). fig. WATERS,lateCarboniferous of Texas (fromLOEBLICH & TAPPAN, 1987,pl.229, ­LOEBLICH& TAPPAN, B) fig. 11). 228,pl.1987, A) Figure 4. however, the layerinner is clearly yellowish and fibrous whereas Palaeotextulariidae (Fig. 3B), is preserved. of calcareous layer, an inner morphologically close to that of the (see study ther also RIGAUD et al., 2015). et al.,CHARD 2004) is still poorly and fur understood requires with concerned the ofappearance such „false keriothecae” (VA phylogentic The septa. the relationship absent in to scarcer pear outer „pavement” ap thin is Canaliculi This eroded. commonly TINGER et al., 1990; HOTTINGER, 2006, for details) 1991; (Fig.al., HOT et 3A). BANNER (see surface test outer the before B) Detail from the holotype specimen of Pl. 1A showing the inner recrystallized calcareous layer. Thin-sectionFigure 514 K3V71/5.3. 190 Climacammina antiqua Climacammina In the adult chambers ofsome chambers adult the In Gerochella cylindrica Gerochella Cribrogoesella robusta Cribrogoesella Details of the wall structure of Foraminiferal genera that are compared with – 41).D) Goesellarotundata (BRADY), early Carboniferous of Scotland (from (from Scotland of Carboniferous early (BRADY), NEAGU, Valanginian of Romania (from NEAGU, (from Romania of NEAGU,Valanginian (BRADY), Holocene of Pernambuco, AtlanticPernambuco, of Holocene (BRADY), Bigenerinanodosaria

Cretaciclavulina gusici (CUSHMAN),Holocene of Philippine Cretaciclavulina Deckerellaclavata Clavulinopsis hofkeri

In Palaeotextulariidae, D´ORBIGNY, Holocene of Cretaciclavulina Clavulinaparisiensis n. gen., n. sp. A) Detail from Pl. 1D showing rare distal pore bifurcations (arrows). the outline outline the CUSHMAN& BANNER n. gen. - - - -

WEIT et al., 2014). Axial sections (that usually do not allow allow not bi do usually (that sections 2014).Axial al., et WEIT per Cretaceous (Coniacian) genus ish inner fibrous calcitic layer was reported recentlyfrom the Up (?originally aragonitic). in observed that generic features acc. to LOEBLICH generic features & TAPPAN, 1987): rized as follows (only the main differences are stressed; ages and tween these genera and and 1985, the with genera TAPPAN,LOEBLICH& Pseudogaudryinidae family the of as 1935, and Clavulina genera the with BERTHELIN, Valvulinidae family the oftives representa various the from reported are wallliculate structure ta exhibit a solid (non-canaliculate) wall different from that of LOEBLICHTAPPAN, &dae 1985. genera mentionedfour The MINSKI, CETEAN & NEAGU, 2010 of the family Prolixoplecti(Campanian) Cretaceous Late the as Goesella 1997 (Fig. 4C) of the Ataxophragmiidae, the Eocene to Holocene THIES, 2001; et KAMINSKI al., 2011) and nata for Lower are exampleCretaceous agglutinated the tests triserial-biserial-uniserial ofsuchExamples stage. biserial short mediating a with but stage, (triserial) trochospiral low the of character the outer layer.glutinating ag (1990)PILLER the by evidencing corrected was view This ner fibrousradial layer”(LOEBLICH & TAPPAN, 1987, p. 218). in an with commonly microgranular, „calcareous, as described originally is structure wall The part. adult the in uniserial ing Palaeobiginerina 4A),(Fig. laeozoic Palaeotextulariid genera such as clavulina ­se ­ciclavulina rial to be distinguished from the triserial forms) of triserial the from distinguished be to ­rial – Forms with a serial and test later as uniserial well as a cana The uniserial stage in Pseudoclavulina UHA, 97 f h Vreiiia (YZA & (TYSZKA Verneuilinidae the of 1927 CUSHMAN, chamber arrangement opposed to 3-2-1 in to opposed arrangement chamber (3-1 stage adult uniserial and early triangular 4E): (Fig. Clavulina CUSHMAN, 1933 of the Valvulinidae (Fig. 4D), as well show morphological resemblance to large-sized pa large-sized to resemblance morphological show Gyrovalvulina ´RIN, 1826, D´ORBIGNY, Deckerella . D’ORBIGNY, 1826 (Palaeocene to Holocene) to D’ORBIGNY, 1826(Palaeocene Cretaciclavulina GALLOWAY. becom biserial are taxa These CUSHMAN, 1936. The differences be differences The 1936. CUSHMAN, CUSHMAN & WATERS (Fig. 4B), and 4B),WATERSand (Fig. & CUSHMAN Clavulinopsis

Cretaciclavulina It is worth mentioning here that a yellow LOEBLICH TAPPAN,& 1985 well as Cretaciclavulina Siphodinarella Cribrogoesella is recrystallized into sparite sparite into recrystallized is BANNER & DESAI, BANNER 1985, Rectogerochammina Climacammina can be roughly summa does not abruptly fol Gerochella Geologia Croatica 69/2 Croatica Geologia Thin-section S2N124. (SCHLAGINT CUSHMAN, CUSHMAN, Cretaciclavu­ Spiroplecti NEAGU, BRADY Cretaci KA Cre­ ­ - - - - - ­ - - - - ­ - - - ­ Geologia Croatica

­ - -

? sp. ?

N, N, Voloshinovella

191 o X

DE CASTRO DE samnitica Scandonea

X

DE CASTRO DE mediterranea Scandonea

X

Rotalispira scarsellai (TORRE) scarsellai Rotalispira

X

CVETKO et al. et CVETKO fleuryi Reticulinella

X X X

. adhami DARMOIAN adhami . cf Nezzazatinella instead is reported from typical X

n. sp. n. Dedicated to Ivan Gušić for (Zagreb)

LUPERTO SINNI LUPERTO lata Murgella ? X

On the east side of the Otočac cove (northeast (northeast cove Otočac the of side east the On

(DE CASTRO) (DE Test elongate, trochospiral to uniserial. The apenninica Montcharmontia Lower Campanian; the highest levels of the ? X X X X X Specimens illustrated in H–OB–F, Figs. Pl. 1, Being monospecific see diagnosis of genus. of see diagnosis monospecific Being

: : Subaxial section illustrated in A, Pl. Fig. 1, and

sp. Cretaciclavulina Minouxia

(Fig. 1). (Fig. X X X X X X

o miliolids

­logies. X X X X X X X X X X X X Description: Fig. 3, Pl. 1 Pl. 3, Fig. 1990 Unidentified or unknownforaminifera –GUŠIĆ & Origin of the name: Holotype Paratypes: Type-locality: Type-level: Diagnosis:

? n. sp. n. ? from isolated specimens recovered from deeper litho water marly Lituolipora early stage, rounded triangular (with concave sides), is most likely likely most is sides), concave (with triangular rounded stage, early triserial as visible in transverse sections (Pl. becoming1B) in creasingly rounded. In the thisspecimen 1A, inshown stage Pl. amounts about ~40 % of the total test. The rounded at void the shallow-water platform carbonates. platform shallow-water gusici Cretaciclavulina 9. 8, figs. JELSKA,15, pl. his contributions to the taxonomy of benthic foraminifera. The JE & GUŠIĆ by first time the illustratedfor also was taxon new synonymy). (see LASKA(1990) details in Pl. G, 1, Fig. and 3B, thin-sectionFig. no. 10807 inv. K3V71/5). (514 10808–10815). no. (inv. 43.352294 coordinates: Approximate island). Brač the of coast 16.796578 Campanian), Turonian–Lower (Upper Formation, Humac Gornji (Lower–MiddleCam Members Lovrečina and Rasotica the and panian) in the Pučišća 2). (Fig. Formation) X X X X X .

­ - - - - -

? sp. ? Lituonella

X ). n. gen., n. sp. (?family Valvulinidae BERTHELIN, 1880) ...

? sp. ? Dictyoconus X

Cretacicla

sp. Dicyclina Cretaciclavulina gusici Cretaciclavulina ? X X X X X X

were all described D’ORBIGNY, 1826 1826 D’ORBIGNY,

HENSON parva pavonia gr. Cretaciclavulina Cuneolina X X X X X X X X X

Cretaciclavulina gusici

? sp. ? Calveziconus X Bigenerina

). CAUS & CORNELLA & CAUS lecalvezae Calveziconus ? X X X X X X X X

Cretaciclavulina

FARINACCI & KÖYLÜOGLU & FARINACCI korayi Antalyna CUSHMAN, 1936 (Upper Cretaceous to Cretaceous (Upper 1936 CUSHMAN, X X CUSHMAN, 1935 (Miocene to Holocene) Holocene) to (Miocene 1935 CUSHMAN,

LOEBLICH & (Eocene): 1985 TAPPAN,

BANNER & (Campanian DESAI, 1985 to

Acordiella conica conica Acordiella FARINACCI ? X X X X Cretaciclavulina ?); ?); aperture with an imperforate toothplate; tooth ; ; see also the comparative table in WEIDICH, 1988); 15 46 Benthic foraminifera (selection) co-occurring with with co-occurring (selection) foraminifera Benthic chamber arrangement) thereby reducing abruptly test di ameter;aperture terminal, distinct a tooth.without but the axis” (LOEBLICH & TAPPAN, 1985, p. 213). p. 1985, TAPPAN, & axis”(LOEBLICH the Pseudoclavulina early stage triangular, Eocene): Lower then uniserial (3-1 erture cribrate in the uniserial stage (opposed to single, and and single, to (opposed stage uniserial the in cribrate erture arealin Gyrovalvulina „triserial and triangular stage early and later chambers in a loose spiral, with progressively encircles completely until finalchambernearly the fewer whorl, chambers per lining (that may simply not be preserved in vulina degrees apart. chambers oriented120 successive of plates Cribrogoesella chambers; five to up with stage trochospiral early 4F): (Fig. rapidly reducing to three, then biserial and finally unise ap canaliculate; strongly septa and walls lateral both rial; lina organic an by internally sealed are bifurcating pores finely Clavulinopsis early (throughout!); triangular test 4G): (Fig. Maastrichtian) cham (3-1 uniserial becoming abruptly later triserial, stage in 3-2-1 to opposed arrangement ber 4 15KR1 15KR1 15 8 S4 8 7/1 S4 7/1 Last but not least, the genus genus the least, not but Last taxa Mesozoic-Cenozoic the that here mentioning worth is It – – – – – – – 18 Ku3 18 2 18 13 13 7 9 5 18 42 Mu 3K 606/20 3K Mu 21 21 212 K213 528 209 18/2S4 209 132 1Kr1 S2N124 251 251 18/1S4 208 223 514 K3V71/5 514 Thin-sections

Taxa and an agglutinating, canaliculate wall (Fig. 4H). anandagglutinating, canaliculate (Fig. wall that were compared with (Eocene to Holocene acc. to LOEBLICH & TAPPAN; 1987) biserial an later becoming stage, early abruptlyshows uniserial, Table 1. 1. Table Felix Schlagintweit and Blanka Cvetko Tešović: Geologia Croatica N M L K J I H G F E D C B A Plate 1. 192 O

Oblique Oblique Broken Subaxial Oblique Detail Slightly Detail Oblique Oblique Slightly Slightly Slightly Subaxial s ( Longitudinal,n 13 15/1Kr1). Cretaciclavulina gusici

from A, showing the transition of the triserial to the uniserial stage. Note the pseudo-keriothekal wall structure. Thin-section inv. no. 10807 (514 K3V71/5). from O, showing the cribrate apertural plate. Thin-section inv. no. 10813 (

fragment consisting of two chambers of the uniserial stage, axial section. Thin-section inv. no. 10814 (208 18/1S4). oblique transverse section in the upper part of the trochospiral stage (see GUŠIĆ oblique transverse section of the uniserial stage. Thin-section inv. no. 10807 (514 K3V71/5). oblique section of the biserial stage. Thin-section inv. no. 10810 (S2N124). oblique transverse section showing triangular outline with concave sides, lower part of the triserial stage. Thin-section inv. no. 10808 (223

section. Thin-section inv. no. 10815 (21 or tangential section of a broken specimen cutting 4 chambers of the uniserial stage. Thin-section inv. no. 10813 ( section of the uniserial stage cutting two chambers. Thin-section inv. no 10808 (223 section of the trochospiral stage. Thin-section inv. no. 10812 (209 18/2S4). section of the triserial stage. Thin-section inv. no. 10811 (132 section of a broken specimen cutting 8 chambers of the uniserial stage. Thin-section inv. no. 10808 (223 ection, holotype specimen. Thin-section inv. no. 10807 (514 K3V71/5). on-centereduniserialspecimen.thestage,chambers, sectionofnotablya I. 9 ofshownThin-sectioninapertural Thedetail is inv. no.10813 from the early Campanian of Brač Island. 42 13 15KR1). 9 18 4 Ku3). 13 15/1Kr1). & JELASKA, 1990, Pl. XV, Fig. 9) 18 7/1 S4). 18 7/1 S4). . Thin-section inv. no. 10809 (213 13 15/1Kr1). Geologia Croatica 69/2 Croatica Geologia 18 7 7/1 S4). 2 18/2 S4). Geologia Croatica ­ ------­ - - - 193 n. gen., gen., n. Annales Annales – n. sp. (Fo n. gen., n. sp. sp. n. gen., n. Cushman emended and and emended Cushman 10.15160/1824-2707/4/1

: 10.1006/cres.2001.0279 : org/10.5169/seals-168658 Neobalkhania bignoti Neobalkhania doi: has been observed in

NEAGU (Lower Val Reticulinella Reticulinella fleuryi Fleuryana adriatica Fleuryana 613. doi 613. – Clavulinoides .– Journal of Foraminiferal Research, 15, 15, Research, Foraminiferal of Journal .– cylindrica

314. – , but is more slender (test length toup (test slender is more , but , B., JELASKA, V., , BUCKOVIĆ, B., D. JELASKA, V., (2001): Stra is compact, finely agglutinated, whereas whereas agglutinated, finely compact, is Clavulinopsis GUŠIĆ the wall is canaliculate is (paraporous). wall the Cretaciclavulina gusici Gerochella Cretaceous Research, 22, 591 22, Research, Cretaceous , , B., – – G. cylindrical G. ŠOVIĆ tia).– Eclogae Geologicae Helvetiae, 92, 163–170. doi: 163–170. 92, Helvetiae, Geologicae Eclogae ­tia).– a 1–19. 54, Pubblicazione, Napoli di dell´Università Paleontologia di Instituto mco) taxa and their relatives.– Bulletin of the British Museum (Natural History) History) (Natural Museum British of the Bulletin relatives.– their and taxa mco) 101–152. 47/2, Geology, 1–84. (5), 1 3, ser. 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Brač, Cro and rise sea-level platform, of for Cretaceous Late the timing and implications limestones carbonate peri-Adriatic the of (Cenomanian-Turonian events anoxic Microfacies: Microfacies: genus Cretaceous new the 10.2113/gsjfr.15.2.79 doi: 79–90. (Ara Redmond the East: Middle the of Textulariacea) (Foraminifera, salidinidae and some other localities on the Adriatic Carbonate Platform.– Razprave IV. Razre IV. Razprave of the Brač (Croatia) Island Maastrichtian from the uppermost Platform.– (Foraminiferida) Carbonate Adriatic the on localities other some and 129–149. 35/8, SAZU, da 245 7, Naturelles, Sciences des shal (Cenomanian-Campanian) Cretaceous Late the of stratigraphy isotope tium of larger calibration chronostratigraphic Italy: of southern carbonates low-water The species Cretaciclavulina gusici Cretaciclavulina VETKO VETKO TE DE CASTRO, P. (1974): Su alcune nuove miliolidi del Senoniano del Mediterraneo.– VI VI Mediterraneo.– del Senoniano del miliolidi nuove alcune Su (1974): P. CASTRO, DE (1994): I. GUŠIĆ, & K. DROBNE, P., CASTRO, DE Céphalopodes. des classe la de méthodique Tableau (1826): A. D’ORBIGNY, Stron and Carbon (2015): M. & M. MUTTI, LUCIA, DI M., PARENTE, G., FRIJIA, BERTHELIN, G. (1880): Mémoire sur les Foraminifères fossils de l´Etage Albien de Mon de Albien l´Etage de fossils Foraminifères les sur Mémoire (1880): G. BERTHELIN, foraminif a Biostratigrapfia (2008): L. SPALLUTO, & R. RETTORI, A., CHECCONI, 1991. R., SCHROEDER, R., RADOIČIĆ, A., CHERCHI, Ocean. Pacific North the of Foraminifera the of Monograph A (1911): J.A. CUSHMAN, Contri foraminifera.– the of re-classification a of outline An (1927): J.A. CUSHMAN, CUSHMAN, J.A. (1933): Some new foraminiferal genera.– Contributions from the Miscel Smithonian Foraminifera.– of species new Fourteen (1935): A. J CUSHMAN, and J.A. CUSHMAN, New (1936): genera and of species Verneuilinidae the families CVETKO, B., GUŠIĆ, I., SCHROEDER, R. (1997): C shallow-water of stratigraphy Carbon-isotope (1999): H.C. JENKYNS, & S.D. DAVEY, anginian of Romania, Fig. 4C) can be considered homeomorphic considered be can 4C) Fig. Romania, anginianof to alreadyAs remarked, mm). 0.29 to mm; betweenwidth0.24 1.4 of wall the in packstones and grainstones containing a diverse association of other and soritids orbitolinids, cuneolinids, foraminifera: benthic miliolids, nezzazatids, coxitids, spirocyclinids, nautiloculinids, textulariaceans,1). rare rotaliids othersand (Tab. ACKNOWLEDGMENT The authors appreciate the very helpful and constructive com ments of the two reviewers Sylvain RIGAUD (Singapore) and the by supportedbeen has work This (Oxford). SIMMONS Mike number IP-2014- under project the Foundation CroatianScience Eng the for ROBSON thankJulie we least, not but Last 09-9541. corrections. lish REFERENCES genus The (1985): D. DESAI, & F.T. BANNER, Chry Mesozoic The (1991): J.E. WHITTAKER, & M.D. SIMMONS, F.T., BANNER, ­ ------n. gen., n. sp. (?family Valvulinidae BERTHELIN, 1880) ... Cretacicla differs from Praechrysalidina Cretaciclavulina gusici has been illustrated by P. P. infracretacea . Cretaciclavulina gusici

LUPERTO SINNI, 1979 (Aptian of south Italy) Cretaciclavulina gusici most random sections are beyond the uniserial stage. Fur stage. uniserial the beyond are sections random most (see also BANNER et al., 1991). BANNER also al., et (see ly ­ly eroded. The pores are straight and more or less parallel Transverse sections of the chrysalidinid Wall thickness (without calcitic inner layer): ~0.065 to ~0.1 mm ~0.1 to ~0.065 layer): inner calcitic (without thickness Wall µm Diametercaniculi: ~7 Remarks: Dimensions: mm 2 to length:up Test mm diameter:0.7 to up Test chambersmm last axial length:5 of Number ~0.2to mm ~0.18 chamberheight: Adult The adult stage is represented by a series of at least six uni six least at series a of represented is Thestage by adult vulina be most likely simple with broad apertural flapssituated at the inner margin, later becoming pierced by numerous areal pores (cribrate) opposed to the single areal foramina in (e.g., LUPERTO SINNI, 1985, pl. 6, fig. very5–6)similar fig. to are 6, pl. SINNI, 1985, LUPERTO (e.g., those of the latter mostly by having a triserially coiled test throughout. the early part the Moreover, of test with its foramina are said to early and late testportions. late and early infracreatcea simple morphology and lack of endoskeleton”. In fact, this mate this fact, In endoskeleton”. of lack and morphology simple form the of character new the recognizing for insufficient was rial based on the combination of the different coiling modes in the triserial early portion (op. cit. Pl. 15, fig. 9, refiguredPl. here on fig. triserial 15, Pl. cit. early portion (op. Based on thesesum 1C). & sections JELASKAGUŠIĆ (1990) marized the characteristics this comprising taxon of „a well-de comparatively a to addition structure,in wall keriothecal veloped longitudinal section of the uniserial final part cutting nine cham cutting part nine uniserialfinal the of section longitudinal detail and 1A, in Pl. refiguredon 8, here fig. 15, pl. cit., bers(op. the of transverse section oblique anrepresents one other The G). GUŠIĆ & JELASKA (1990, pl. 15, figs. 8, 9) as an „unidentified an as 9) 8, figs. 15, pl. JELASKA & (1990, GUŠIĆ illustrations two unknownThea are presented or foraminifera”. interiomarginal in the trochospiral and areal in the uniserial part.uniserial the in areal and trochospiral the ininteriomarginal aperturalcribrate a with provided areal, Aperturechamber) (last 1I). (Pl. plate ner calcitic layer are discernible. The thickness of this layer is about 0.04 mm at the lateral walls and is decreasing/taperingupon the septa towards the foramina Foramen single (Fig. 3B). most adult the In part. outer the in branch may but arrangement), (radial in an remnantsspecimen,of holotype the uniserialof chambers of microgranular or microagglutinated calcareous material, thick thick material, calcareous microagglutinated or microgranular of and canaliculate paraporous)This(or with fine 3A). pores(or canaliculi) (Fig. surface test outer the before shortly blindly ending thin outer layer (or „pavement”, see HOTTINGER, 2006) is a single foramen in a central to slightly eccentric position. In axIn eccentricposition. slightly centralto a in foramen single a shape rectangular low a have chambers appressed the sections, ial with rounded margins. agglutinating,Wall with a large amount and height. This accounts for the slender, sometimes slightly bent bent slightly sometimes slender, the for accounts This height. and cylindroconical Transverse testsections morphology. are either almost are septa solid The outline. in elliptical slightly or circular by pierced and overlapping) chambersarenot the that (so planar serial chambers. This stage is roughly cylindrical, rectilinear to breadth in increase slightly only that chambers with bent, slightly the test become more and more rounded in outline (Pl. 1B–E, G). G). 1B–E, (Pl. outline in rounded more and more become test the A short biserial part occurs between the triserial and uniserial 1D). stages(Pl. apex apex of the holotype specimen refers topossibly the proloculus Altogether, (Fig. thePl. 1G). information on the initial stage is as poor of uniserialtransversesections stage, following the towards ther Felix Schlagintweit and Blanka Cvetko Tešović: Geologia Croatica LUPERTO SINNI, E. 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