Jebel Billum I-7 (Jurassic of Yemen)

Where: Wasi Hajar, Yemen (14.3° N, 48.5° E: paleocoordinates 12.9° S, 31.7° E)

• small collection-level geographic resolution

When: Arus Member (Hajar Formation), Tithonian (152.1 - 145.0 Ma)

• Jebel Billum I section

•26.5 m above base

• bed-level stratigraphic resolution

Environment/lithology: marl

• lithology described as marl

Size class: macrofossils

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 2582: authorized by Mark Patzkowsky, entered by Karen Layou on 09.07.1999

Creative Commons license: CC BY (attribution)

Taxonomic list

Bivalvia
 Nuculida - Nuculidae
Palaeonucula sp. Quenstedt 1930 nut clam
 Carditida - Astartidae
cf. Neocrassina duboisiana clam
originally entered as "Neocrassina cf. duboisiana"
Cephalopoda
 Ammonitida - Aspidoceratidae
Aspidoceras sp. Zittel ammonite
 Ammonitida - Neocomitidae
Substeueroceras koeneni Steuer 1897 ammonite
Berriasella sp. Uhlig 1905 ammonite
Berriasella oppeli Kilian 1889 ammonite
 Ammonitida - Himalayitidae
"cf. Malbosiceras aizyensis" = Lopeziceras chaperi
"cf. Malbosiceras aizyensis" = Lopeziceras chaperi Pictet 1868 ammonite
originally entered as "Malbosiceras cf. aizyensis"
 Ammonitida - Perisphinctidae
"cf. Virgatosphinctes broilii" = Perisphinctes (Virgatosphinctes) broilii
"cf. Virgatosphinctes broilii" = Perisphinctes (Virgatosphinctes) broilii Uhlig 1910 ammonite
originally entered as "Virgatosphinctes cf. broilii"
 Ammonitida - Polyptychitidae
"Choicensisphinctes limitis" = Craspedites limitis
"Choicensisphinctes limitis" = Craspedites limitis Burckhardt 1930 ammonite
 Ammonitida - Oppeliidae
Uhligites sp. Kilian 1913 ammonite
 Ammonitida - Olcostephanidae
 Ammonoidea -
Laevaptychus sp. Trauth 1927 ammonoid aptychus