Shaqra Group (Tuwaiq Mt. Lst.,T1,2) (Jurassic of Saudi Arabia)

Where: Saudi Arabia (25.8° N, 45.3° E: paleocoordinates 0.1° S, 33.7° 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.
• yellow, clayey limestones

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 47912: authorized by Franz Fursich, entered by Simone Hicks on 07.03.2005

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
unclassified
  -
Cyclichna sp.
Cyclichna sp.
=Lammeli.
Foraminifera
 Spirillinina - Spirillinidae
Spirillina sp.
Spirillina sp. Reuss 1862
 Involutinina - Trocholinidae
Trocholina palastiniensis
 Ataxophragmiacea - Globotextulariidae
Pseudomarssonella sp.
Pseudomarssonella sp. Redmond 1965
 Textulariina - Pfenderinidae
Kurnubia bramkampi, Kurnubia ex gr. palastiniensis
Gastropoda
 Trochoidea - Trochidae
Trochus sp.
Trochus sp. Linnaeus 1758 top snail
 Vetigastropoda - Discohelicidae
Discohelix sp.
Discohelix sp. Dunker 1847 snail
 Architaenioglossa - Ampullinidae
Globularia sp.
Globularia sp. Swainson 1840 snail
 Sorbeoconcha - Naticidae
"Ampullaria sp." = Natica (Ampullaria)
"Ampullaria sp." = Natica (Ampullaria) Lamarck 1799 moon snail
=Gastr.
 Heterostrophia -
"Nerinea bruntrutana" = Ptygmatis pseudobruntrutana
"Nerinea bruntrutana" = Ptygmatis pseudobruntrutana Gemmellaro 1865 snail
 Heterostropha - Nerineidae
Cossmannea sp., Nerinea sp.
Cossmannea sp. Pcelincev 1931 snail
Nerinea sp. Deshayes 1827 snail
Bivalvia
 Pholadomyida - Pholadomyidae
Homomya cf. gibbosa
Homomya cf. gibbosa Sowerby 1814 clam
 Pholadida - Ceratomyidae
Ceratomya cf. concentrica
Ceratomya cf. concentrica Sowerby 1822 clam
 Megalodontida - Dicerocardiidae
Pseudisocardia cf. macfadyeni
 Megalodontida - Ceratomyopsidae
Ceratomyopsis somaliensis, Ceratomyopsis cf. arabica
 Mytilida - Mytilidae
Inoperna cf. sowerbyana
 Ostreida - Pinnidae
Trichites saussurei
 Ostreida - Palaeolophidae
"Lopha solitaria" = Actinostreon gregareum
"Lopha solitaria" = Actinostreon gregareum Sowerby 1816 oyster
 Pectinida - Limidae
Plagiostoma cf. subcardiiformis
Plagiostoma cf. subcardiiformis Greppin 1867 file clam
 Pectinida - Pectinoidae
Eopecten inequistriatus, Chlamys cf. curvivarians, Chlamys splendens
Chlamys cf. curvivarians Dietrich 1933 scallop
Chlamys splendens Dollfus 1863 scallop