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AMEGHINIANA ISSN 0002-7014 Revista de la Asociación Paleontológica Argentina Tomo XII Diciembre de 1975 N?4 THE INDO-PACIFIC AMMONITE MAY AITES IN THE OXFORDIAN OF THESOUTHERN ANDES By P. N. STIPANICIC', G. E. G. WESTERMANN 2 and A. C. RJCCARDI3 ABSTRACT: Oxfordian Iitho- and biostratigraphy of the Chilean and Argentine Andes is reviewed (P. N. Stipanicic). Within the Chacay Group, the Lower to basal Upper Oxfordian La Manga Formation, below, mostly detrital and biogenic, and the Upper Oxfordian Au- quilco Formation, above, mainly chemical, are distinguished. The La Manga Formation (with Gryphaea calceola lumachelle) is rich in ammonite faunas, particularly of thc upper Cordatum to lower Canaliculatum Zones. In Neuquén and Mendoza provinces of Argentina, the Pli- catilis Zone or Middle Oxfordian has yielded Perísphinctes spp., Euaspidoceras spp., Aspido- ceras spp., together with Mayaítes (Araucanites ) stípanícfcí, M. (A.) reyesi, and M. (A.) mulai, Westermann et Riccardi subgen. et spp. nov. The first find of Mayaitidae outside the Indo-Pacific province is discussed in light of _plate-tectonic theory. RESUMEN: La revisron Iito- y bioestratigráfica del Oxfordiano de los Andes de Argentina y Chile (P. N. Stipanicic) ha permitido reconocer dentro del Grupo Chacay: 1) abajo, la Formación La Manga, mayormente detrítica y biogénica, del Oxfordiano inferior-superior basa!, y 2) arriba, la Formación Auquilco, mayormente química, del Oxfordiano superior. La For- mación La Manga (con lumachelas de Gryphaea calceola) contiene abundante cantidad de amonitas, particularmente de las Zonas de Cordatum superior a Canaliculatum inferior. En las provincias de Mendoza y Neuquén,Argentina, la Zona de Plicatilis (Oxfordiano medio) contiene Perispbinctes spp., Euaspidoceras spp., Aspidoceras spp., conjuntamente con Mayaites (Araucanites) stipanicici, M. (A.) reyesi, y M. (A.) mulai, Westermann et Riccardi subgen. et spp. nov. El primer hallazgo de Mayaitidae fuera de la provincia lndo-Pacífica es dis- cutido tomando en consideración la teoría de tectónica de placas. · P·¡¿Ó•¡ e¡·•o¡l ¿ÓS•Ón·•¡ Ón Só¿°¡7 a·¡l =BFC5 RÓnos P•Ós5 PñÓ•¡7 • Department of Geology, Md1aster Univorsity, Hamilton , Ontario, Canadi •. !l ~Juseo ¿Ó S•Ón·•¡s Naturales, c¡ gl¡t¡5 PrñÓnt•n¡7 ~ 281- THE OXFORDIAN cipal Gypsum" (Schiller, 1912); in Chile OF THE ANDEAN GEOSYNCLINE as Millonaria Formation (Harrington, OF ARGENTINA AND CHILE 1961), Middle Member of the Laguni- llas Forma tion (Aguirre Le Bert, 1960), By P. N. STIPANICIC Midd1e Member of the Valle Grande Formation (Gonzalez and Vergara, 1964), 1. LITHOSTRATIGRAPHY Rio Colina Formation (Gonzalez, 1963), Santa Elena Member of the Nacientes del Oxfordian is well represented within Teno Forrnation (K10hn Giehm, 1960), the Argentine and Chilean part of the and others. Mesozoic Andean Geosyncline where it The lower unit, although showing mi- forms part of the Chacay Group t sensu nar facies variation and varying in thick- Stipanicic and Mingramm in Groeber, ness from O to 220 m, was named La 1951 ), belonging to the Chacayano se- Manga Formation (Stipanicic and Min- dimentary cycle (Groeber, Stipanicic and gramm in Groeber, 1951 ,as "Manguen- Mingramm, 1953). The base is marked se"; Stipanicic, 1966). Formerly known by a disconformity or unconformity (Río as "blue limestones with Grypbaea" Grande Phase) with Oxfordian directly (Groeber, 1929), the formation appears overlying Bajocian to Middle Callovian 111 outcrop superficially homogeneous beds; Upper Callovian appears to be with brownish-bluish-gray weathering missing in the entire basin except in the colour. Two main 1ithofacies can be dis- Domeyko mountain range (Hillebrandt, tinguished: (a) a nearsbore facies of thick 1970). The Chacay Group is, in turn, un- hard limestones, sometimes arenaceous, conformably overlain (Araucan Phase) by dark grayish weathering b1uish-gray, with Lower to Upper Kimmeridgian or even cora1s, 1umachelle of Gryphaea calceoia Tithonian (Stipanicic, 1966, 1969; Stipa- ( Qu.) and scarce ammonites; and (b ) nicic and Rodrigo, 1970). a standard facies,above with bluish-gray The Chaca y Group is divided into two Iimestone with minimal amounts of clas- distinct but intergrading sedimentary units, tic, intergrading upwards into the Auquil- i.e., the lower one is mostly detrital and co Formation by increased interbedding biogenic belonging to the Lower to basal of gypsum, with scarce ammonites, and Upper Oxfordian; the upper one, mainly below predominant1y brownish-gray silts- chemical, belongs to the Upper Oxfor- tone, shales, calcilutite and oolites, with dian. The upper unit has unusual facies more abundant ammonites (Groeber et. homogeneity from 18° S in northern Chi- al., 1953; Stipanicic, 1966). le to 39° S in Neuquén province, consis- The standard facies has been identi- ting of up to 400 m of gypsum and/or fied in the subsurface of Neuquén pro- anhydrite and interbedded stinking whitish vince (named Barda Negra Formation, 1imestones in different proportions. In Digregorio, 1965). In Chile, synchronic Argentina, this unit is known as the sediments in similar facies were given a Auquilco Formation (Weaver, 1931; number of formatianal names (Cecioni Groeber, 1946), formerly also as "Prín- and Garcia, 1960 a, b; Galli and Ding- - 282- 70° \ SANTIAGO. / - TUPUNGATO - TUNUYAN I í I \k/o--Col-ino I ---34° RANCAGUA _ ! {¿\ - I A SAN RAFAEL t!¡/! 't0 Blonco R/o O,amant.- CURICÓ !.~ T t Aa di Monqo .,1 _ l· R/o Choicos . O ~\ R/o reno. S.onlo Elehol ' •'¡' •• ,.,_0<',-".," _~~~ '" ,,, c.,,, ' TALCA - R/a \ ~I ~.~rgüe "'0 ~ Mf Ossto v/ti> \ • Ows vw lo g·ryw I I -------36° ! CHILLAN. Aquada de Campos X (Sierra de Reyes) X Aquodo de lo Mulo Veqo de lo Veranodo LOS ANGELES R¡'O • J -f'''ó <9. ~o \ .6. Main localities with Oxfordian faunos X Id.• with Movoitidoe o 50 t\\• I 6464 4 NEUQUEN. Fig. 1. - Importaut Oxfordiao local il.ies, inelnding those wiLh Mayaites (Araucanites) sul-gen . ·eL spp. nov., in ArgenLina and Chile between latitudes 33° and 3908 (eL Sti panicic , 11)66) - 283- man 1962' Harrington, 1961; Klohn or Plicatilis Zones, but only Plicatilis mrnm, lJ~m.Jm lwm ij~~m~~~r~ ~illl~mm l~m)1 nlmlll~ facies in northern Chile to standard fa- Zone and possibly part of the Cordatum cies, often with andesite flows, in the Zone seems more probable. The upper central latitudes: i.e. Tarros Fm., Chacari- beds, with Gregoryceras toucasianum 11a Fm.,Upper Agua Santa Fm., Dorali- (d'Orb.), G. d. transuersarium (Qu.) , sa Fm., and Upper Rinconada Member Ocbetoceras hispidum (Opp.), Perispbinc- of the Nacientes del Teno Formation, etc. tes (Arisphinctes?) andium Stein., P. (A.?) boebmi Stein., P. (A.?) gleimi 2. BIOSTRATIGRAPHY AND BIOCHRONO- Stein., Mirosphinctes sp., and Euaspi- LOGY OF THE LA MANGA FORMATION. doceras d. perarmatum (Sow.), were placed in the Transversarium Zone (Hil- The La Manga equivalents in northern lebrandt, 1970). The lower Bimam- Chile have yielded airich fauna of the matum Zone is indicated by Decipia (?) Plicatilis and Canaliculatum Zones (Mi- gottschei (Stein.}, Discosphinctes d. lu- ddle and lower Upper Oxfordian) at - cingae (Favre) and Euaspidoceras d. Caracoles (Steinmann, 1881; Stehn, 1923; '. perarmatum, while the upper part of the Leanza, 1947 a) including Ochetoceras zone is indicated b~ Decipia (?) deser- canaliculatum (v. Buch), Trimarginites torum (Stehn), Ocbetoceras d. bispi- arolicus (Opp.), Euaspidoceras d. perar- dum (Opp.}, Campylites d. mexicanus matum (Sow.), E. cbilense Leanza, Pe- (Burckh. ), Euaspidoceras sp. and 1doce- risphinctes healeyi (Neum.) P. andium ras sp. (Hillebrandt, 1970). However, Stein., P. (Arisphinctes) barringtoni several species of the last two assembla- Leanza. A very similar fauna occurs ges are already known from the Canali- further north at Arica, together with culatum and even Pliea tilis Zones of doubtful Progeronia which would indica- Europe (Arkell, 1956; Enay et al., 1974). te Lower Kimmeridgian ( Cecioni and Further south in Chile and Argentina, Garcia, 1960 a, b; Corvalan, 1965; Salas the La Manga Formation ("Manguenses" et al., 1966). Faunal lists of partially beds ) was long regarded as Callovian mixed Middle Callovian and Oxfordian (Groeber, 1918, 1929, 1933; Gerth, faunas from the Santa Ana Formation of 1925; Larnbert, 1956), in spite of some pa- Negreiros (Cecioni and Garcia, 1960 o; laeontological evidence suggesting Oxfor- Cecioni, 1961) need to be reexamined. dian. The small poorly preserved assernbla- In general, the northern Chilean faunas ge from the Santa Elena Region (Iocality appear to be mainly Middle Oxfordian. 19) originally described by Burckhardt In the Domeyko Mountains, 25-26° S, (1900 a) as Athleta Zone and later the lower La Manga equivalents yielded (Burckhardt, 1903) reclassified and dated Gregoryceras (Pseudogregoryceras ) d. Callovian-Oxfordian boundary of Mariae iteni (Jeannet), Campylites (Neopriono- Zone (Spath, 1931), needs to be enlar- ceras) d. benrici (d'Orb.) and Peris- ged and reexamined; the alleged Quens- phinctidae which Hillebrandt (1970) on tedtoceras C'Cardioceras aff. lamberti") page 192 considered to represent Lamberti could be a crushed macrocephalitid accor- - 284- SIERRA DE REYES EÜROPEAN ZONES VEGA DE LA VERANADA STAGES (Neuquén) ( Mandozo) viroatosoninct es Ironsilorius Fm, MUERTA Fm .. TlHioNIAN VACA MUERTA VA CA } Severa I z on e s ( s 1,) Virqalosphineles Gravesia qravesiana Hybonolieeros oeck er t KIMMERIDGE a atocost, p s eu aomut ab is (s. str.} Strebliles {SIr. teno it. s. sir, lenuilob,atus Sut n, p ta ty not a Idoeeras {Sulneria qalar Ir UJ planula 51· Idoe.plan. s,slr. e, z e, Epipeltoeeras bimammolum « ::> Perisphineles· mor t eüi> Ocñetoc er as eanolieulalum o Pe/toeeras Pejloeeras, Euospidoeeras « el:: Pe/loeeros, Euaspidoc eras, ;; C> O Perisphinel (Kranoospl¡ineles) ~ Perisph, (Arisphineles) z .. u, ci Perisphinetes pliealilis « c Mayailes (Aroueon/les l sp. KKKLlm88 1\..) P (Prososphineles) :::¡; X ex> '" Mayailes ( ar ouconites ) sp. [ M. (A) mu tai, M. (A) r.ey es¡ « Vl O M. (A) sl/panieiei ..J ~ Cardioeeras cordatum o -' Ouens tedt ocer as mariae o.: Ouens te d toc er os tamb er t¡ z ::> Pel/oeeros attitet o « o Erymnoceros coronatum > Kosmoeeros ja s on O ...J '" ...J Ir Maeroeephaliles .
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  • A New Tithonian Ammonoid Fauna from Kurdistan, Northern Iraq

    A New Tithonian Ammonoid Fauna from Kurdistan, Northern Iraq

    A NEW TITHONIAN AMMONOID FAUNA FROM KURDISTAN, NORTHERN IRAQ BY L. F. SPATH, F.R.S. Pp• 93-146; Pis. 6-10 BULLETIN OF THE BRITISH MUSEUM (NATURAL HISTORY) GEOLOGY Vol. 1 No. 4 LONDON : 1950 THE BULLETIN OF THE BRITISH MUSEUM (NATURAL HISTORY), instituted in 1949, is to be issued in five series, corresponding to the Departments of the Museum. Parts will appear at irregular intervals as they become ready. V olumes will contain about three or four hundred pages, and will not necessarily be completed within one calendar year. This paper is Vol. i, No. 4, of the Geological series. PRINTED BY ORDER OF THE TRUSTEES OF THE BRITISH MUSEUM Issued August 1950 Price Ten Shillings A NEW TITHONIAN AMMONOID FAUNA FROM KURDISTAN, NORTHERN IRAQ By L. F. SPATH , F.R.S. CONTENTS I. INTRODUCTION . 96 II. STRATIGRAPHICAL SUMMARY 96 III. SYSTEMATIC DESCRIPTIONS 97 Family Oppelidae Haug . 97' Sub-Family Streblitinae Spath . 97 Genus Oxylenticeras gen. nov. 97 Oxylenticeras lepidum sp. nov. 99 Family Haploceratidae Zittel . 100 Genus Glochiceras Hyatt . 100 Glochiceras (?) sp. juv. ind. 100 Glochiceras (?) sp. nov. 101 Genus Pseudolissoceras Spath . 101 Pseudolissoceras zitteli (Burckhardt) 101 Pseudolissoceras advena sp. nov. 102 Genus Lamellaptychus Trauth . 104 Lamellaptychus sp. ind. 104 Family Perisphinctidae Hyatt . 104 Sub-Family Virgatosphinctinae Spath . 104 Genus Phanerostephanus gen. nov. 104 Phanerostephanus subsenex sp. nov. 105 Phanerostephanus hudsoni sp. nov. 107 Phanerostephanus intermedius sp. nov. 107 Phanerostephanus dalmasiformis sp. nov. 109 Genus Nannostephanus gen. nov. 109 Nannostephanus subcornutus sp. nov. 111 Nannostephanus sp. ind. 111 Sub-Family Virgatitinae Spath . 112 Genus Nothostephanus gen. nov.
  • Ammonites of Tethyan Origin in the Ryazanian Stage of the Russian Platform: Genus Mazenoticeras and Other Neocomitidae V

    Ammonites of Tethyan Origin in the Ryazanian Stage of the Russian Platform: Genus Mazenoticeras and Other Neocomitidae V

    ISSN 00310301, Paleontological Journal, 2011, Vol. 45, No. 2, pp. 143–153. © Pleiades Publishing, Ltd., 2011 Original Russian Text © V.V. Mitta, 2011, published in Paleontologicheskii Zhurnal, 2011, No. 2, pp. 25–33. Ammonites of Tethyan Origin in the Ryazanian Stage of the Russian Platform: Genus Mazenoticeras and Other Neocomitidae V. V. Mitta Paleontological Institute, Russian Academy of Sciences, Profsoyuznaya 123, Moscow, 117997 Russia email: [email protected] Received April 21, 2010 Abstract—Ammonites from the Riasanites rjasanensis Zone (Ryazanian Stage of the Russian Platform) of the family Neocomitidae are considered. The new species Mazenoticeras robustum sp. nov. and M. ceccai sp. nov. are described. Other members of this genus and of the genera Malbosiceras and Pomeliceras are identified in open nomenclature. Keywords: ammonites, Neocomitidae, Mazenoticeras, Pomeliceras, Malbosiceras, Ryazanian Stage, Berria sian Stage, Russian platform. DOI: 10.1134/S0031030111020122 INTRODUCTION (Wright et al., 1996), it includes, apart from the nomino Some time ago I (Mitta, 2008) began a series of papers typical subfamily, the subfamilies Berriasellinae Spath, on results of taxonomic studies of taxonomic diversity of 1922 and Endemoceratinae Schindewolf, 1966. How ammonites of “Tethyan” origin in the Ryazanian Stage ever, the absence of a substantiated phylogeny, which (Central Russian equivalent of the Berriasian Stage would take into account shell morphogenesis and orna (Lower Cretaceous, Standard scale)). In this paper I con mentation, sutural ontogeny, stratigraphic distribution sider ammonites of the family Neocomitidae belonging and biogeography makes the delineation between Neo to the genera Malbosiceras Grigorieva, 1938, Pomeliceras comitinae and Berriasellinae unclear. The origin of the Grigorieva, 1938, and Mazenoticeras Nikolov, 1966.
  • Phylogenetic Relations Among Oxfordian and Kimmeridgian Aspidoceratinae « Classical Species », Deduced from the Subbetic Record (South Spain)

    Phylogenetic Relations Among Oxfordian and Kimmeridgian Aspidoceratinae « Classical Species », Deduced from the Subbetic Record (South Spain)

    PHYLOGENETIC RELATIONS AMONG OXFORDIAN AND KIMMERIDGIAN ASPIDOCERATINAE « CLASSICAL SPECIES », DEDUCED FROM THE SUBBETIC RECORD (SOUTH SPAIN). A PROPOSAL by An to n io CHECA * Sum m ary R £ s u m £ The present work aims to present a scheme, that Ce travail essaie de presenter un schema, qui ne doit must not be considered as definitive, which principal pas Stre considere comme definitif et dont le principal interest is the easening of an image on the relations interSt reside dans le fait qu’il fournit une image sur between « classical species » of Aspidoceratinae in les relations entre « esp^ces classiques » d’Aspidoce­ agreement with the information obtained in the Sub- ratinae, conformement k l’information obtenue dans betic Zone (South Spain), altogether with the detailed la Zone Subb6tique (Sud de l’Espagne), ainsi qu’& la stratigraphical reference of those species in this rSfdrence stratigraphique d6taill6e de ces esp^ces dans region. The last aspect reflects significant peculiarities cette region. Le dernier aspect reflete des particulari­ showed by ammonites (Aspidoceratinae in this case) t y significatives montrees par les ammonites (Aspido­ as are biostratigraphical differences related with their ceratinae dans ce cas) comme le sont les differences biogeographical distribution. The four european biostratigraphiques en rapport avec leur distribution genera of Aspidoceratinae are analysed. Physodoce­ biogeographique. On analyse les quatre genres euro- ras and Orthaspidoceras appear narrowly related, pdens d’Aspidoceratinae. Physodoceras et Orthaspi­ being the basical morphologies of this last genus doceras apparaissent en dtroite relation, les morpho­ always obtained through the accentuation of single logies de base de ce dernier genre s’obtenant toujours characters present in the corresponding species of au moyen d’une accentuation de caractfcres simples Physodoceras.
  • The Upper Jurassic of Europe: Its Subdivision and Correlation

    The Upper Jurassic of Europe: Its Subdivision and Correlation

    The Upper Jurassic of Europe: its subdivision and correlation Arnold Zeiss In the last 40 years, the stratigraphy of the Upper Jurassic of Europe has received much atten- tion and considerable revision; much of the impetus behind this endeavour has stemmed from the work of the International Subcommission on Jurassic Stratigraphy. The Upper Jurassic Series consists of three stages, the Oxfordian, Kimmeridgian and Tithonian which are further subdivided into substages, zones and subzones, primarily on the basis of ammonites. Regional variations between the Mediterranean, Submediterranean and Subboreal provinces are discussed and correlation possibilities indicated. The durations of the Oxfordian, Kimmeridgian and Tithonian Stages are reported to have been 5.3, 3.4 and 6.5 Ma, respectively. This review of the present status of Upper Jurassic stratigraphy aids identification of a num- ber of problems of subdivision and definition of Upper Jurassic stages; in particular these include correlation of the base of the Kimmeridgian and the top of the Tithonian between Submediterranean and Subboreal Europe. Although still primarily based on ammonite stratigraphy, subdivision of the Upper Jurassic is increasingly being refined by the incorporation of other fossil groups; these include both megafossils, such as aptychi, belemnites, bivalves, gastropods, brachiopods, echino- derms, corals, sponges and vertebrates, and microfossils such as foraminifera, radiolaria, ciliata, ostracodes, dinoflagellates, calcareous nannofossils, charophyaceae, dasycladaceae, spores and pollen. Important future developments will depend on the detailed integration of these disparate biostratigraphic data and their precise combination with the abundant new data from sequence stratigraphy, utilising the high degree of stratigraphic resolution offered by certain groups of fos- sils.