Shaqra Group (Tuwaiq Mt. Lst.,T3) (Jurassic of Saudi Arabia)

Where: Saudi Arabia (20.3° N, 45.2° E: paleocoordinates 5.0° S, 31.1° E)

• coordinate stated in text

• outcrop-level geographic resolution

When: Tuwaiq Mt.Lst. Formation (Shaqra Group), Callovian (166.1 - 163.5 Ma)

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

• The Tuwaiq Mt. Lst. of middle to late Callovian age; locally clayey at the base; this predominantly calcareous formation determines the characteristic relief of central Arabia (Jabal Tuwayq); it is a reef platform.

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 47885: authorized by Franz Fursich, entered by Simone Hicks on 06.03.2005

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Crinoidea
 Millericrinida - Millericrinidae
Millericrinus sp., Ceriocrinus sp.
Millericrinus sp. d'Orbigny 1840 Sea lily
=sp.1
Ceriocrinus sp. Sea lily
=Crinoidea,Koenig (1845) unpubl.,Agassiz (1836)
Bivalvia
 Mytilida - Mytilidae
Inoperna sp.
Inoperna sp. Conrad 1873 mussel
 Ostreida - Eligmidae
Eligmus polytypus
Eligmus polytypus Eudes-Deslongchamps 1856 oyster
 Pholadomyida - Pholadomyidae
Pholadomya lirata
Pholadomya lirata Sowerby 1818 clam
 Cardiida - Arcticidae
Isocyprina sp.
Isocyprina sp. Röder 1882 clam
Gastropoda
 Heterostropha - Nerineidae
Nerinea sp.
Nerinea sp. Deshayes 1827 snail
 Architaenioglossa - Ampullinidae
Globularia sp.
Globularia sp. Swainson 1840 snail
 Sorbeoconcha - Aporrhaidae
Aporrhais sp.
Aporrhais sp. da Costa 1778 snail
Rhynchonellata
 Rhynchonellida - Tetrarhynchiidae
Kutchirhynchia gregoryi
 Terebratulida - Loboidothyrididae
Bihenithyris sp.
Bihenithyris sp. Muir-Wood 1935
Foraminifera
 Involutinina - Trocholinidae
Trocholina sp.
Trocholina sp. Paalzow 1922
=sp.2=Foram.
 Lituolacea - Nautiloculinidae
Nautiloculina sp.
Nautiloculina sp. Mohler 1938
 Textulariina - Pfenderinidae
Steinekella steinekei, Kurnubia ex gr. palastiniensis, Kurnubia sp.
Kurnubia sp. Henson 1948