Jebel Billum IV-6 (Jurassic of Yemen)

Where: Wadi Hajar, Yemen (14.3° N, 48.4° E: paleocoordinates 11.8° S, 31.0° E)

• small collection-level geographic resolution

When: Madbi Formation, Oxfordian (163.5 - 157.3 Ma)

• Jebel Billum IV section

•lower storm bed, at base of fm.

• bed-level stratigraphic resolution

Environment/lithology: marine; shale

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 2597: authorized by Mark Patzkowsky, entered by Karen Layou on 09.07.1999

Creative Commons license: CC BY (attribution)

Taxonomic list

Cephalopoda
 Ammonoidea -
Laevaptychus sp. Trauth 1927 ammonoid aptychus
Gastropoda
 Turbinoidea - Proconulidae
Proconulus arabiensis Newton 1908 snail
Bivalvia
 Arcida - Parallelodontidae
Indogrammatodon egertonianus Stoliczka 1865 clam
 Pectinida - Pectinoidae
Camptonectes sp. Meek 1864 scallop
 Ostreida - Posidoniidae
Posidonia somaliensis Cox 1935 oyster
 Ostreida - Palaeolophidae
aff. Actinostreon solitaria oyster
originally entered as "Actiostreon aff. solitaria"
 Ostreida - Gryphaeidae
"Nanogyra fourtaui" = Nanogyra (Nanogyra) nana
"Nanogyra fourtaui" = Nanogyra (Nanogyra) nana Sowerby 1822 oyster
originally entered as "Nannogyra fourtaui"
 Carditida - Astartidae
aff. Neocrassina unilateralis clam
originally entered as "Neocrassina aff. unilateralis"
 Trigoniida - Trigoniidae
Trigonia sp. Bruguière 1789 clam
 Nuculida - Nuculidae
Palaeonucula sp. Quenstedt 1930 nut clam
Rhynchonellata
 Rhynchonellida - Tetrarhynchiidae
Somalirhynchia sp. Weir 1925
large, coarsely costate
Somalirhynchia smelliei Weir 1925
Somalirhynchia africana var. smelliei
cf. Somalirhynchia arabica Cooper 1989
originally entered as "Somalirhynchia cf. arabica"
cf. Somalirhynchia africana Weir 1925
originally entered as "Somalirhynchia cf. africana"
 Terebratulida - Loboidothyrididae
Bihenithyris weiri Muir-Wood 1935
Ptyctothyris daghaniensis Muir-Wood 1935
originally entered as "Ptycotothyris daghaniensis"
cf. Cererithyris wyvillei
originally entered as "Cererthyis cf. wyvillei"
 Terebratulida - Zeilleriidae
? Rugitela sp.
fragements - originally entered as "?Rugetela sp."