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

Where: Saudi Arabia (24.0° N, 45.2° E: paleocoordinates 1.6° S, 32.8° E)

• coordinate stated in text

• outcrop-level geographic resolution

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

Environment/lithology: lagoonal or restricted shallow subtidal; lithified, argillaceous 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 48034: authorized by Franz Fursich, entered by Simone Hicks on 11.03.2005

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Rhynchonellata
 Rhynchonellida - Tetrarhynchiidae
Burmirhynchia sp. n. sp.
Burmirhynchia sp. n. sp. Buckman 1917
=n.sp.2
Gastropoda
 Sorbeoconcha - Aporrhaidae
Harpagodes sp.
Harpagodes sp. Gill 1870 snail
Bivalvia
 Ostreida - Ostreidae
Lopha eructa
 Megalodontida - Dicerocardiidae
Pseudisocardia cf. macfadyeni
 Cardiida - Quenstedtiidae
Quenstedtia sp.
Quenstedtia sp. Morris 1854 clam
Cephalopoda
 Ammonitida - Stephanoceratidae
Ermoceras cf. runcinatum, Ermoceras sp.
Ermoceras cf. runcinatum Arkell 1952 ammonite
Ermoceras sp. Douvillé 1916 ammonite
=sp.1
 Ammonitida - Sonniniidae
Dorsetensia tecta
Foraminifera
 Lituolacea - Nautiloculinidae
Nautiloculina oolithica