Lentitornoceras, Korn & Bockwinkel, 2022

Korn, Dieter & Bockwinkel, Jürgen, 2022, The tornoceratid ammonoids from the Roteisenstein Formation of Dillenburg (Cephalopoda, Ammonoidea), European Journal of Taxonomy 806, pp. 32-51 : 44-45

publication ID

https://doi.org/ 10.5852/ejt.2022.806.1699

publication LSID

lsid:zoobank.org:pub:A2B2A310-8C8C-41B0-B934-1666129B7D90

DOI

https://doi.org/10.5281/zenodo.6380555

persistent identifier

https://treatment.plazi.org/id/99D306D3-03BA-4D2A-BBF6-9F47653F5907

taxon LSID

lsid:zoobank.org:act:99D306D3-03BA-4D2A-BBF6-9F47653F5907

treatment provided by

Felipe

scientific name

Lentitornoceras
status

gen. nov.

Genus Lentitornoceras gen. nov.

urn:lsid:zoobank.org:act:99D306D3-03BA-4D2A-BBF6-9F47653F5907

Type species

Lentitornoceras materni gen. et sp. nov.

Diagnosis

Genus of the subfamily Tornoceratinae with strongly compressed conch, umbilicus closed in the adult stage. Without ventrolateral grooves. Ornament with biconvex growth lines, without ribs. Sutural formula E A L I; adventive lobe broadly rounded, asymmetric with steep dorsal flank; ventrolateral saddle narrow.

Etymology

After the Latin nomen ‘ lens ’ = ‘lentil’, because of the conch shape, and the reference to the genus Tornoceras .

Included species

Only the type species.

Remarks

Lentitornoceras gen. nov. is easily distinguished from all other tornoceratids by its extremely discoidal conch shape. Furthermore, the course of the growth lines shows differences to other genera; in

Lentitornoceras a clear dorsolateral projection is developed, which is only very indistinct in the other genera.

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