Jebel Billum II-1 (Jurassic to of Yemen)

Where: Wadi Hajar, Yemen (14.3° N, 48.5° E: paleocoordinates 12.1° S, 31.2° E)

• small collection-level geographic resolution

When: Billum Member (Naifa Formation), Kimmeridgian to Kimmeridgian (157.3 - 157.3 Ma)

• 7 m above base

• bed-level stratigraphic resolution

Environment/lithology: limestone

• lithology described as limestone pavement

Primary reference: M. K. Howarth and N. J. Morris. 1998. The Jurassic and Lower Cretaceous of Wadi Hajar, southern Yemen. Bulletin of the Natural History Museum (Geology) 54(1):1-32 [M. Patzkowsky/K. Layou/A. Clement]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 2585: authorized by Mark Patzkowsky, entered by Karen Layou on 09.07.1999

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Cephalopoda
 Ammonitida - Aspidoceratidae
Euaspidoceras sp.
Euaspidoceras sp. Spath 1931 ammonite
 Ammonitida - Sphaeroceratidae
Paryphoceras grayi
Paryphoceras grayi Spath 1924 ammonite
 Ammonitida - Ataxioceratidae
Orthosphinctes polygratus
 Ammonitida - Perisphinctidae
Idoceras ahwarense, Larcheria gredingensis
Idoceras ahwarense Howarth 1998 ammonite
loose, ?fallen from higher in the Billum Member
Larcheria gredingensis Wegele 1929 ammonite