Gastropoda, Volutidae
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Contr. Tert. Quatern. Geol. 37(1-2) 23-34 4 pis. Leiden, July 2000 The genus Cymbium (Gastropoda, Volutidae) in the Iberian Neogene Bernard M. Landau InternationalHealth Centres Albufeira, Portugal and RobertMarquet Antwerp, Belgium in the Iberian — Contr. Tert. Landau, Bernard M. & Marquet, Robert. The genus Cymbium (Gastropoda, Volutidae) Neogene. Quatern. Geol., 37(1-2): 23-34, 2 tabs, 4 pis. Leiden, July 2000. 1798 is recorded from the Arenas de Huelva Formation A new species of the volutid genus Cymbium Rödding, (Zanclean, Early and from the Velerin Pliocene), as exposed near the village of Lucena del Puerto (province ofHuelva), Conglomerates near Estepona (province of Málaga), both in southern Spain. It is the first record ofthe genus from the European Neogene. Key words —- Zanclean, Pliocene, Spain, Mollusca, Volutidae, new species. B.M. Landau, International Health Centres, Avenida Infante de Henrique 7, Areias S3o Jo5o, P-8200 Albufeira, Portugal; R. Marquet, Institutroyal des Sciences naturelles de Belgique, do Constitutiestraat 50, B-2060 Antwerp, Belgium. Contents (1987) as the Arenas de Huelva Formation. Deposits around Velerin, Estepona (province of are more varied, consisting of nearshore or Introduction p. 23 Malaga) 23 beach (coarse conglomerates and coarse sands) Systematic palaeontology p. deposits and fine clayey sands laid down at greater Acknowledgements p. 26 relatively 26 The conglomerates contain the richest fauna, References p. depths. comprising a curious admixture of large and small wa- ter-worn and perfectly preserved shells between rocks and of mudstone of sizes. Introduction lumps varying Deposition must have been relatively rapid, possibly under storm conditions. These are considered The continues the series new deposits contempora- present paper describing neous with those at Huelva (Vera-Pel&ez et al., and endemic molluscan species which have recently 1995). This correlation is further confirmed by the occurrence come to light in outcrops of Early Pliocene (Zanclean) at Velerin of the new species of described strata in southern Spain (Landau, 1984; Landau & Mar- Cymbium herein, and of two additional species thought quet, 1999; Lozano Francisco & Landau, 1999). originally to be endemic to the Arenas de Huelva Formation, Outcrops around Lucena del Puerto (province of namely Crepidula lucenica Landau, 1984 and Cyllene Huelva) comprise fine- to relatively coarse-grained described lucenensis Landau& Marquet, 1999. sands deposited nearshore. The new species (Cyllenina) herein, however, is restricted to the ‘grey sands’ at lo- calities 4 and 5 of Landau (1984), as exposed near the PALAEONTOLOGY hamlet of Santa Catalina. Previous authors have com- SYSTEMATIC mented the distinction between these fine on grey sands, Abbreviations — To denote the of which are known only from boreholes around Santa repositories speci- referred in the abbre- Catalina (Landau, 1984; Landau & Marquet, 1999), and mens to text, the following viations used: the coarser ‘yellow sands’ described by Civis et al. are 24 IRScNB Rmol DC km west of Lomé, Togo), from 8 m depth, December Institut royal des Sciences naturelles de Belgique 1979 (PI. 2, Fig. 2); (Brussels), Recent Mollusca, Dautzenberg Colin; C. souliei Marche-Marchad, 1974 (= C. cymbium IRScNB Rmol GC (Linné, 1758)): IRScNB RMol DC, without locality ditto, Recent Mollusca, General Colin; data(identified by Marche-Marchad) (PI. 3, Fig. 1); IRScNB 1ST - C. marmoratus : IRScNB Rmol 24, from Dakar ditto, Invertebrates of Secondary and Tertiary (Senegal) (PI. 2, Fig. 1); Colin; C. patulum (Broderip, 1830): IRScNB Rmol DC, KF K. Fraussen Colin, Aarschot (Belgium); from Embouchure du Catumbella, 17 June 1910 MG M. Grigis Colin, Ninove (Belgium); (Mission Gravel) (PI. 3, Fig. 4); B.M. Landau Albufeira C. BML Colin, (Portugal); pepo (Lightfoot, 1786) (= C. senegalensis RM R. Marquet Colin, Antwerp (Belgium); Marche-Marchad, 1978): IRScNB Rmol GC 302, JLVP J.L. Vera-Pelaez Colin, M&laga (Spain). from West Africa (PI. 2, Fig. 5); C. glans (Gmelin, 1791): IRScNB Rmol DC, from the estuary ofGabon River, 1892 (PI. 3, Fig. 3); Superfamily Volutacea Rafinesque, 1815 C. cucumis Röding, 1798: IRScNB Rmol GC 399, Family VolutidaeRafinesque, 1815 from Gibraltar, at about 45 m depth, 1964 (PI. 2, Subfamily ZidoninaeH. & A. Adams, 1853 Fig. 4); Genus Cymbium Roding, 1798 C. cymbium: IRScNB Rmol GC 306, from Mbour (Senegal), 5 January 1989 (PI. 3, Fig. 2); — Voluta IRScNB Rmol Type species cymbium Linné, 1758, by origi- C. maroccanum (Pallary, 1930): DC, nal designation. from Mogador (Morocco) (PI. 2, Fig. 3). Also examined, but not illustrated here, were: Cymbium ibericum sp. nov. PI. 1, Figs 1,2; PI. 3, Fig. 5; PI. 4, Fig. 1 - C. pachyus (Pallary, 1930): IRScNB Rmol DC [holotype, repository is Brussels IRScNB, not Paris, ?1952b 1830) — as mentioned Weaver & Yetus gracilis (Broderip, Lecointre, p. by DuPont, 1970, p. 68], 133, pi. 25, fig. 8a, b. 1984 Cymbium olla (Linne, 1758)— Landau, p. 140. Lastly, the KF Collection contains C. fragile Fittkau & Stuermer, 1985, from Grand Lahou (Ivory Coast), Types — Holotype is IRScNB 1ST 6399; paratype is dredged at 30 m depth, which is illustrated here in PI. 4, IRScNB 1ST 6400. Fig. 2. Derivatio nominis — Named after the Iberian Penin- sula. Diagnosis of C. ibericum — A small to medium-sized Locus typicus — Locality 4 (Landau, 1984), Santa species characterised by short, broad body whorl and a near Lucena delPuerto Catalina, (Huelva, Spain). U-shaped subsutural canal with a sharp edge reflected Stratum — Arenas de Huelva Formation typicum (Zan- inwards over the canal, forming a ledge and partially clean, Early Pliocene). covering it. Material studied— Of C. ibericum, material contained Dimensions— see Tables 1 and 2. in the collections was studied: BML Colin following (4 — Description Shell small to medium for genus, ovate Colin specimens), RM (3 specimens), MG Colin (3 and maximum 83.8 broadly inflated, thin, height mm, all from the and level. Material specimens), type locality maximum width 49.0 mm. Protoconch relatively broad from the Velerin is contained in the fol- Conglomerates and completely covered by thick callus. Deep U-shaped lowing collections: JLVP Colin (1 specimen), RM Colin subsutural canal around the protoconch, partially cov- 1 and BML Colin (1 juvenile, fragment), (4 fragments). ered by the edge of the body whorl which is sharp and Extant of in the collec- species Cymbium, contained reflected inwards over the canal. Teleoconch of about tions ofthe Institut royal des Sciences naturelles de Bel- 1.25 to 1.5 whorls. Body whorl short and inflated, gique and identified T. I. (Brussels), by Backeljau, shoulder curving smoothly towards the canal. Aperture Marche-Marchad and J. Van Goethem, were also stud- wide and semiovate. Outer lip thin, bevelled, forming a ied. These include the following, illustrated here (Pis 1- shallow arch where the outer lip joins the parietal wall, 4): slightly flared below, smooth within. Siphonal notch shallow and wide. Fasciole well defined by a ridge. - with three columellar Cymbium olla (Linne, 1758): IRScNB Rmol GC Columella concave strong plaits. Parietal callus in 192, from Lagos (Algarve, Portugal) (PI. 1, Fig. 3); thin, some specimens containing ex- - C. gracilis (Broderip, 1830) (= C. marmoratus Link, crescences, extending onto the apertural side of the body of the whorl 1807): IRScNB Rmol GC 359, from Avepozo (15 whorl, progressively covering more body 25 inferiorly. Shell smooth, growth lines forming the only (Broderip, 1830), C. tritonis (Broderip, 1830) (see ornament. Poppe & Goto, 1992, p. 186, pi. 81, figs 3, 4), C. pepo Remarks — ibericum is in the C. have Cymbium not common (= senegalensis) all inflated shells with the 'grey sands' at Santa Catalina. The twelve adult shells maximum width mid-shell and narrower at both ends, available are all remarkably similar not only in size, quite unlike C. ibericum. Cymbium maroccanum has an ranging from 91.0 to 99.2 mm in length, but also in apex which very slightly protrudes above the suture, as other shell characteristics. The protoconch is more worn well as a much narrower shell with less globular adapi- in it a flatter but it cal than the new some specimens, giving appearance, part species. is otherwise fairly constant in width. Lecointre(1952b, p. 133, pi. 25, fig. 8a, b) described In the Velerin Conglomerates near Estepona, this C. marmoratus from the Neogene of Morocco, albeit is under the species is very rare, and known only from one com- name Yetus gracilis, which is a junior syno- plete, repaired specimen (PI. 3, Fig. 5; PI. 4, Fig. 1) nym. His illustration of a specimen from Dar-bel Hamri, which is larger than the Huelva shells, as well as a sin- also ofEarly Pliocene age, is very similar to C. ibericum from in broad shell gle juvenile (RM Colin) and four fragments (BML and Velerin, showing a short, with the characteristic subsutural canal RM collns). The characteristics of the teleoconch are sharply edged and large identical Link's is slender with to those of the Huelva specimens, but the pro- protoconch. species more an toconch is from The canal is also markedly larger, varying in size 16.3 to elongated narrower aperture. sharply callused and but not reflected inwards. The columellar 21.7 mm, more heavily more dome-shaped. edged ridges It is this form which has the closest resemblance to a are more oblique in the Recent shell. The specimen ' from of Pleisto- specimen identified as Yetus gracilis’ (= Cymbium Agadir (Morocco), Tyrrhenian (Ouljien, marmoratus) and illustrated by Lecointre (1952b, pi. 25, cene) age, illustrated by Lecointre(1952a, pi. 25, fig. 9), fig. 8a, b). In contrast to the situation in most gastro- is more elongated than the one illustrated in fig. 8 and pods, the protoconch seems to have little importance in may well represent C. cucumis, rather than C. marmo- earlier defining species ofthe genus Cymbium. Also in the Re- ratus, as noted by Brebion (1979, p.