Shaqra Group (Tuwaiq Mt. Lst.,T2,upper part) (Jurassic of Saudi Arabia)

Where: Saudi Arabia (24.8° N, 46.1° E: paleocoordinates 1.3° S, 33.9° 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 47890: authorized by Franz Fursich, entered by Simone Hicks on 06.03.2005

Creative Commons license: CC BY (attribution)

Taxonomic list

Coccolithophyceae
 Stephanolithiales - Stephanolithiaceae
 Podorhabdales - Cretarhabdaceae
Polypodorhabdus escaigii Noël 1965
=nannoflora
 Podorhabdales - Axopodorhabdaceae
Ethmorhabdus anglicus Rood et al. 1971
=nannoflora
 Eiffellithales - Chiastozygaceae
Zeugrhabdotus erectus Deflandre 1954
=nannoflora
 Watznaueriales - Watznaueriaceae
"Watznaueria manivitae" = Watznaueria, "Ellipsagelosphaera communis" = Watznaueria, "Ellipsagelosphaera britannica" = Watznaueria, Cyclagelosphaera margereli
"Watznaueria manivitae" = Watznaueria
=nannoflora
"Ellipsagelosphaera communis" = Watznaueria
=nannoflora
"Ellipsagelosphaera britannica" = Watznaueria
=nannoflora
Foraminifera
 Textulariina - Pfenderinidae
 Lituolacea - Nautiloculinidae
 Involutinina - Trocholinidae
Cephalopoda
 Ammonitida - Pachyceratidae
Erymnoceras cf. ajax d'Orbigny 1850 ammonite
 Ammonitida - Stephanoceratidae
Gastropoda
 Vetigastropoda - Discohelicidae
 Architaenioglossa - Ampullinidae
Globularia cf. formosa Morris and Lycett 1851 snail
"Ampullospira sp." = Ampullina (Ampullospira) Harris 1897 snail
Rhynchonellata
 Rhynchonellida - Tetrarhynchiidae
Kutchirhynchia indica d'Orbigny 1847
 Terebratulida - Loboidothyrididae
Bihenithyris barringtoni Muir-Wood 1935
 Terebratulida -
Magharithyris cf. triplicata Farag and Gatinaud 1960
Farag&Gatinaud (1962)
Echinoidea
 Calycina -