Gelwanajan, 78-87 (Jurassic to of Somalia)

Where: Somalia (10.6° N, 43.0° E: paleocoordinates 10.9° S, 27.9° E)

• coordinate stated in text

• small collection-level geographic resolution

When: basal Member (Sa Wer Formation), Bathonian to Bathonian (168.3 - 163.5 Ma)

• samples 78-87

• bed-level stratigraphic resolution

Environment/lithology: shallow subtidal; lithified grainstone and lithified marl

• well-bedded yellowish calcarenite and sandy marls, very fine, light gray limestones, sometimes dolomitized

Size class: macrofossils

Preservation: cast

Primary reference: E. Abbate, G. Ficcarelli, C. Pirini Radrizzani, A. Salvietti, D. Torre and A. Turi. 1974. Jurassic sequences from the Somali coast of the Gulf of Aden. Rivista Italiana di Paleontologia e Stratigrafia 80(3):409-478 [W. Kiessling/U. Merkel]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 100385: authorized by Wolfgang Kiessling, entered by Uta Merkel on 08.12.2010

Creative Commons license: CC BY (attribution)

Taxonomic list

Echinoidea
 Euechinoidea - Hemicidaridae
 Salenioida - Acrosaleniidae
Recrosalenia somaliensis Currie 1935 sea urchin
 Irregularia - Clypeidae
Clypeus williei sea urchin
Crinoidea
 Millericrinida - Millericrinidae
Millericrinus sp. d'Orbigny 1840 Sea lily
Bivalvia
 Ostreida - Gryphaeidae
Gryphaea costellata Douvillé 1916 oyster
 Ostreida - Eligmidae
Eligmus rollandi Douvillé 1907 oyster
Rhynchonellata
 Rhynchonellida - Tetrarhynchiidae
 Terebratulida - Loboidothyrididae