New occurrence of the middle Toarcian Telodactylites eucosmus (Lippi Boncambi, 1947) (Ammonitina) from the NW European realm, and introduction of a new genus.

Romain Jattiot (1) , Alexis Gris , Vincent Trincal (2)

1 BGS - Biogéosciences [UMR 6282]
2 LMDC - Laboratoire Matériaux et Durabilité des constructions

Telodactylites Pinna & Levi-Setti, 1971 was, up to now, considered to be a middle Toarcian ammonite genus restricted to the Mediterranean realm. We here document two specimens from the Variabilis Subzone (middle Toarcian) of the Thouars area (western France), interpreted as extreme variants of “Telodactylites” eucosmus (Lippi Boncambi, 1947). However, Telodactylites Pinna & Levi-Setti, 1971 must be considered a junior synonym of Peronoceras Hyatt, 1867 and its recent usage is based on an illegitimate subsequent change of its type species. A new genus Neotelodactylites is introduced (type species: Peronoceras eucosmum Lippi Boncambi, 1947). The new finds represent firm evidence for the occurrence of Neotelodactylites n. gen. eucosmus in the NW European realm, therefore considerably extending the palaeogeographical distribution of this species and genus.

Mots clés: Ammonites; Toarcian; Telodactylites; NW European and Mediterranean realms; palaeobiogeography

Domaines: Paléontologie

Romain Jattiot, Alexis Gris, Vincent Trincal. New occurrence of the middle Toarcian Telodactylites eucosmus (Lippi Boncambi, 1947) (Ammonitina) from the NW European realm, and introduction of a new genus.. Neues Jahrbuch für Geologie und Paläontologie - Abhandlungen, 2020, 295 (1), pp.53-60. ⟨10.1127/njgpa/2020/0867⟩. ⟨hal-02540012⟩