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

Where: Saudi Arabia (25.1° N, 45.7° E: paleocoordinates 0.8° S, 33.7° 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 48397: authorized by Franz Fursich, entered by Simone Hicks on 18.03.2005

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Anthozoa
 Scleractinia - Microsolenidae
Chomatoseris jacobi
Chomatoseris jacobi Alloiteau 1945 stony coral
Echinoidea
 Cidaroida - Rhabdocidaridae
Rhabdocidaris copeoides
Rhabdocidaris copeoides Agassiz and Desor 1847 pencil urchin
 Irregularia -
Bothryopneustes dhrumaensis
 Salenioida - Acrosaleniidae
Recrosalenia sp.
Recrosalenia sp. sea urchin
=n.sp.3
 Euechinoidea - Hemicidaridae
Pseudocidaris levis
Bivalvia
 Pectinida - Limidae
Limatula gibbosa
 Pholadomyida - Pholadomyidae
Pholadomya sp., Homomya gibbosa
Pholadomya sp. Sowerby 1823 clam
Homomya gibbosa Sowerby 1814 clam
Rhynchonellata
 Rhynchonellida - Tetrarhynchiidae
Daghanirhynchia subversabilis, Burmirhynchia sp.
Burmirhynchia sp. Buckman 1917
=n.sp.A
 Terebratulida - Lobothyrididae
Tubithyris cf. jubaensis
Foraminifera
 Lituolacea - Nautiloculinidae
Nautiloculina sp.
Nautiloculina sp. Mohler 1938
 Spirillinina - Spirillinidae
Spirillina sp.
Spirillina sp. Reuss 1862
 Involutinina - Trocholinidae
Trocholina sp.
Trocholina sp. Paalzow 1922
=Foram.