Shaqra Group (Dhruma Fm.) (Jurassic of Saudi Arabia)

Where: Saudi Arabia (23.2° N, 46.3° E: paleocoordinates 2.8° S, 33.5° E)

• coordinate stated in text

• outcrop-level geographic resolution

When: Dhruma Formation (Shaqra Group), Bajocian (170.3 - 168.3 Ma)

Environment/lithology: lagoonal or restricted shallow subtidal; lithified limestone

• The Dhruma Fm essentially is composed of limestones and clayey rocks in its central outcrop zone but passes to detrial facies northwards and southwards.

Size classes: macrofossils, microfossils

Collection methods: bulk, mechanical,

Primary reference: J. Manivit, Y.-M. Le Nindre, and D. Vaslet. 1990. Le Jurassique D`Arabie Centrale. Document du BRGM 4(194):25-519 [F. Fursich/S. Hicks/W. Kiessling]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 48082: authorized by Franz Fursich, entered by Simone Hicks on 13.03.2005

Creative Commons license: CC BY (attribution)

Taxonomic list

Echinoidea
 Salenioida - Acrosaleniidae
Recrosalenia sp. sea urchin
=n.sp.3
Rhynchonellata
 Terebratulida - Zeilleriidae
Cephalopoda
 Ammonitida - Stephanoceratidae
Stephanoceras sp., "Normannites cf. braikenridges" = Normannites, "Itinsaites (Itinsaites) sp." = Normannites
Stephanoceras sp. Waagen 1869 ammonite
=sp.indet
"Normannites cf. braikenridges" = Normannites ammonite
"Itinsaites (Itinsaites) sp." = Normannites ammonite
=Ammo.
 Ammonitida - Sonniniidae
Sonniniidae indet. Buckman 1892 ammonite
=Ammo. (Buckmann 1892)
Sonninia (Sonninia) sp. Douville 1879 ammonite
=sp.3
Gastropoda
 Heterostropha - Nerineidae
Nerinea sp. Deshayes 1827 snail
 Sorbeoconcha - Aporrhaidae
Aporrhais sp. da Costa 1778 snail
Bivalvia
 Pectinida - Limidae
 Ostreida - Eligmidae
Eligmus polytypus Eudes-Deslongchamps 1856 oyster
 Trigoniida - Trigoniidae
Trigonia ex gr. pullus Sowerby 1826 clam