A new family of coleoids from the Lower Jurassic of Osteno, northern Italy

Citation
A. Garassino et Dt. Donovan, A new family of coleoids from the Lower Jurassic of Osteno, northern Italy, PALAEONTOL, 43, 2000, pp. 1019-1038
Citations number
66
Categorie Soggetti
Earth Sciences
Journal title
PALAEONTOLOGY
ISSN journal
00310239 → ACNP
Volume
43
Year of publication
2000
Part
6
Pages
1019 - 1038
Database
ISI
SICI code
0031-0239(200012)43:<1019:ANFOCF>2.0.ZU;2-Y
Abstract
The discovery of well preserved and almost complete fossil coleoid cephalop ods near Osteno in northern Italy has allowed the original study of a singl e specimen by Pinna (1972) to be enhanced. The unusual structure of the ten arms, showing a clear differentiation in the shape of the arm hooks (long and thin on six arms and short and stocky on the other four), is a distinct ive character which is not present in any Jurassic family of coleoids known to date. We distinguish two new genera: Ostenoteuthis, with the species O. siroi sp. nov., and Uncinoteuthis, with the species U. curvieri sp. nov. T he new family Ostenoteuthidae (Order uncertain) is erected for them. The sy stematic position of this family within the fossil coleoids is discussed.