Desmoceratidae and Silesitidae (ammonitida) from the Aptian - Albian of Antarctica

Aptian-Albian Desmoceratidae and Silesitidae of James Ross Island, Antarctica are described. Desmoceratid Puzosiinae are represented by Parasilesites IMLAY, Pseudosilesites EGOIAN, Feruglioceras LEANZA, Umsinenoceras KENNEDY et al., and Silesitidae by species of Neoastieria EGOIAN, Piatnitzkyceras M...

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Bibliographic Details
Main Authors: Medina, F.A., Riccardi, A.C.
Format: Journal/Newspaper
Language:unknown
Subjects:
Albian
Ammonitida
Antarctica
Aptian
Desmoceratidae
Puzosiinae
Silesitidae
Aioloceras
Parasilesites
Antarc*
James Ross Island
Ross Island
Online Access:https://hdl.handle.net/20.500.12110/paper_00777749_v242_n2-3_p289_Medina
Description
Summary:Aptian-Albian Desmoceratidae and Silesitidae of James Ross Island, Antarctica are described. Desmoceratid Puzosiinae are represented by Parasilesites IMLAY, Pseudosilesites EGOIAN, Feruglioceras LEANZA, Umsinenoceras KENNEDY et al., and Silesitidae by species of Neoastieria EGOIAN, Piatnitzkyceras MEDINA & RICCARDI, and Sobraliceras gen. nov. On James Ross Island several assemblage zones are recognized: the Peltocrioceras assemblage zone (Upper Aptian) is characterized by Pseudosilesites russoi (LEANZA); the Ptychoceras assemblage zone (Lower Albian) by Feruglioceras piatnitzkyi LEANZA, Umsinenoceras sp. indet., U.? sp. nov., Neoastieria antarcticaensis sp. nov., Piatnitzkyceras thomsoni sp. nov., Sobraliceras stoneleyi gen. et sp. nov. and 5.? sp. nov.; the Aioloceras assemblage zone (Lower Albian) is characterized by Piatnitzkyceras cf. bonarellii MEDINA & RICCARDI, Umsinenoceras cardielense MEDINA & RICCARDI, U. compressum sp. nov., Parasilesites jamesrossi sp. nov., P. densicostatus sp. nov., and Sobraliceras robustum gen. et sp. nov. © 2006 E. Schweizerbart'sche Verlagsbuchhandlung. Fil:Medina, F.A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina.

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