Trubatsa calviniacensis Merle, Pacaud, Ledon & Goret, 2024, n. sp.
Authors/Creators
- 1. Muséum national d'histoire naturelle, Département Origines et Évolution (CR 2 P - MNHN, CNRS, UPMC, Sorbonne Université), 57 rue Cuvier, 75231 Paris cedex 05 (France) didier. merle @ mnhn. fr (corresponding author) jean-michel. pacaud @ mnhn. fr dnledon @ yahoo. fr
- 2. Raoul Ponchon, F- 31500 Toulouse (France) bernardgoret @ hotmail. com
Description
Trubatsa calviniacensis n. sp.
(Figs 5G, H; 25L)
urn:lsid:zoobank.org:act: 287FDBCE-A766-4813-9403-2ABDD9B439E3
Trubatsa parisiensis – Merle & Pacaud 2019: 16, 17, text-fig 3.5 [non d’Orbigny, 1850].
TYPE MATERIAL. — Holotype. France • Paris Basin, Oise, Cauvigny (Châteaurouge); Calcaire grossier moyen (biozone NP15); middle Eocene (middle Lutetian); MNHN.F.A25590 (Pacaud coll.), H: 17 mm (Figs 5G, H; 25L).
ETYMOLOGY. — From Calviniacus, the Latin name of the type locality Cauvigny (Oise, France).
TYPE HORIZON. — Calcaire grossier moyen (biozone NP15), see Gély & Lorenz (1991: pl. 1); middle Eocene (middle Lutetian).
TYPE LOCALITY. — France, Paris Basin, Oise, Cauvigny (Châteaurouge), see Fritel 1910: 85).
DISTRIBUTION. — Only known from the type locality.
DESCRIPTION
Bulbous protoconch of two whorls; pointed apex.Teleoconch up to 17.8 mm in height, up to 9.2 mm in width, biconic in profile, composed of six whorls. High spire. Last whorl representing up to 70% total height. Spiral angle 62°. Suture weakly impressed. Axial sculpture consisting of four slightly spiny varices per whorl. On spire, anal tube (P1) and short spine (P2). Anal tube forming angle of approximately 45° with shell axis. Anal tube (P1) totally integrated in varices eliminating shoulder. Short P2 spine on first whorls. No callus at base of anal tube. On convex part of last whorl and abapically to anal tube, five spinelets (P2, P3, P4, P5 and P6). Intervarical spaces with weak P2 to P5 cords. Ovate aperture up to 30% of diameter, up to 74% of height of last whorl (including siphonal canal). Edge, erect, smooth. peristome complete. Siphonal canal closed, occupying 47% of apertural lenght.
COMPARISONS
Merle & Pacaud (2019: pl. 3, fig. 4) attributed a specimen (MNHN.F.A25590) from the middle Lutetian of Cauvigny (Paris Basin) to T. parisiensis (d’Orbigny, 1850). Like T. ganensis n. sp. it has a paucispiral protoconch and lacks partition. Therefore, it can easily be distinguished from T. parisiensis from the Hampshire Basin which has a multispiral protoconch. Trubatsa calviniacensis n. sp. differs from T. ganensis n. sp. in being higher spired, the primary cord P6 on the last whorl, weak primary cords P2 to P 4 in the intervarical spaces, and by having a more ovate aperture. P2 spine is also more marked on the first teleoconch whorls. Although we have only one specimen, the number of shell differences with the Gan specimens and its occurrence in a strongly different paleoenvironment (deep water at Gan (Merle 1985; Merle & Roux 2018) in Aquitaine Basin, versus shallow water in the Paris Basin (Gély 2008) and also quite different age, highly suggest that it represents a different species.
Notes
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Linked records
Additional details
Biodiversity
- Collection code
- MNHN
- Scientific name authorship
- Merle & Pacaud & Ledon & Goret
- Kingdom
- Animalia
- Phylum
- Mollusca
- Order
- Neogastropoda
- Family
- Muricidae
- Genus
- Trubatsa
- Species
- calviniacensis
- Taxon rank
- species
- Taxonomic status
- sp. nov.
- Type status
- holotype
- Taxonomic concept label
- Trubatsa calviniacensis Merle, Pacaud, Ledon & Goret, 2024
References
- MERLE D. & PACAUD J. - M. 2019. - Five new muricid species (Mollusca, Gastropoda) from the Eocene of France, Senegal and Pakistan. Xenophora Taxonomy 25: 11 - 22.
- GELY J. - P. & LORENZ C. 1991. - Analyse sequentielle de l'Eocene et de l'Oligocene du Bassin parisien (France). Revue de l'institut francais du petrole 46 (6): 713 - 747.
- FRITEL P. H. 1910. - Guide geologique et paleontologique de la region parisienne dans un rayon de 100 kilometres. Deyrolle, Paris, 356 p.
- LAMARCK J. - B. 1822. - Histoire naturelle des animaux sans vertebres presentant les caracteres generaux et particuliers de ces animaux, leur distribution, leurs classes, leurs familles, leurs genres, et la citation des principales especes qui s'y rapportent et Supplement a divers types de gasteropodes et de Trachelipodes comprenant l'indication des coquilles fossiles qui ne furent point citees dans leurs genres respectifs. Tome 7. Lamarck, Paris, 711 p.
- LAMARCK J. - B. 1805. - Sur les fossiles des environs de Paris. Explication des planches relatives aux coquilles fossiles des environs de Paris. Annales du Museum d'Histoire Naturelle 6 (33): 222 - 228.
- DESHAYES G. - P. 1835. - Description des coquilles fossiles des environs de Paris. Tome 2. Livraisons 40 - 45, l'auteur, Bechet Jeune, Baudouin freres, Treuttel & Wurtz, Paris: 499 - 780; Atlas 2, Levrault, Paris: pl. 79 - 106. https: // doi. org / 10.5962 / bhl. title. 52303
- COSSMANN M. & PISSARRO G. 1911. - Iconographie complete des coquilles fossiles de l'Eocene du Bassin de Paris. Tome 2. Hermann, Paris: pl. 26 - 45. https: // www. biodiversitylibrary. org / page / 36319938
- MERLE D. 1985. - Les communautes fossiles en tant qu'indicateurs paleobiologiques de milieux: exemples pris sur le Cuisien de Gan (Pyrenees-Atlantiques) et l'Egerien de Hongrie. Bulletin du Museum national d'Histoire naturelle, Paris 4 eme ser. 7, sect. C, 24: 257 - 262.
- MERLE D. & ROUX M. 2018. - Stalked crinoids from Gan (Late Ypresian, southwestern France). Exceptional stereom preservation, paleoecology and taxonomic affinities. Swiss Journal of Paleontology 137: 225 - 244. https: // doi. org / 10.1007 / s 13358 - 018 - 0162 - 0
- GELY J. - P. 2008. - La stratigraphie et la paleogeographie du Lutetien en France, in MERLE D. (ed.), Stratotype Lutetien. Museum national d'Histoire naturelle, Paris; Biotope, Meze; BRGM, Orleans: 76 - 104 (coll. Patrimoine geologique; 1).