Shaqra Group (middle Dhruma D4,middle) (Jurassic of Saudi Arabia)

Where: Saudi Arabia (24.2° N, 46.6° E: paleocoordinates 1.9° S, 34.1° E)

• coordinate stated in text

• outcrop-level geographic resolution

When: Dhruma Formation (Shaqra Group), Bathonian (168.3 - 166.1 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 45395: authorized by Franz Fursich, entered by Simone Hicks on 20.10.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
unclassified
  -
Pentasepta sp.
Pentasepta sp.
=n.sp.=Hexac.
Anthozoa
 Scleractinia - Cyathophoridae
Cryptocoenia sp.
Cryptocoenia sp. d'Orbigny 1849 stony coral
 Scleractinia - Conophyllidae
Isastrocoenia sp.
Isastrocoenia sp. Gregory 1900 stony coral
Bivalvia
 Pholadida - Pleuromyidae
Pleuromya cf. alduini
Pleuromya cf. alduini Brongniart 1821 clam
 Mytilida - Mytilidae
Arcomytilus laitmairensis
Arcomytilus laitmairensis de Loriol 1883 mussel
 Ostreida - Eligmidae
Eligmus cf. analites, Eligmus polytypus
Eligmus polytypus Eudes-Deslongchamps 1856 oyster
Gastropoda
 Heterostropha - Nerineidae
Nerinea nodosa
 Sorbeoconcha - Aporrhaidae
Harpagodes sp.
Harpagodes sp. Gill 1870 snail
 Architaenioglossa - Ampullinidae
Globularia cf. formosa
Globularia cf. formosa Morris and Lycett 1851 snail
 Trochoidea - Trochidae
Trochus sp.
Trochus sp. Linnaeus 1758 top snail
Rhynchonellata
 Terebratulida - Eudesiidae
"Eudesia magharensis" = Eudesia (Sphriganaria) magharensis
"Eudesia magharensis" = Eudesia (Sphriganaria) magharensis Farag 1960
 Terebratulida - Lobothyrididae
"Cererithyris wylliei" = Tubithyris wylliei
"Cererithyris wylliei" = Tubithyris wylliei Weir 1929
Echinoidea
 Pedinoida -
Farquharsonia somaliensis
 Salenioida - Acrosaleniidae
Acrosalenia arabica
 Irregularia -
Bothryopneustes dhrumaensis
Bothryopneustes dhrumaensis sea urchin
=Echin.