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

Where: Saudi Arabia (23.5° N, 46.0° E: paleocoordinates 2.3° S, 33.3° 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 48334: authorized by Franz Fursich, entered by Simone Hicks on 17.03.2005

Creative Commons license: CC BY (attribution)

Taxonomic list

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Ostracoda
 Podocopida - Progonocytheridae
Procytheridea aff. disparlateralis, Procytheridea aff. gublerae
 Podocopida -
Marslatourella sp.
 Podocopida - Bairdiidae
Bairdia cf. hilda
 Podocopida - Cytherideidae
Schuleridea triangularis
 Podocopida - Trachyleberididae
Oligocythereis sp.
 Podocopida -
Micropneumatocythere sp.
Foraminifera
 Involutinina - Trocholinidae
Trocholina sp.
Trocholina sp. Paalzow 1922
=Foram.
 Spirillinina - Spirillinidae
Spirillina sp.
Spirillina sp. Reuss 1862
 Textulariina - Prolixoplectidae
Riyadhella rotundata
 Lituolacea - Nautiloculinidae
Nautiloculina sp.
Nautiloculina sp. Mohler 1938
 Ataxophragmiacea - Globotextulariidae
Pseudomarssonella ex gr. bipartita, Pseudomarssonella biangulata, Pseudomarssonella reflexa