Shaqra Group (Tuwaiq Mt. Lst.,T3,1) (Jurassic of Saudi Arabia)

Where: Saudi Arabia (25.4° N, 45.5° E: paleocoordinates 0.5° 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.

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 47902: 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
  -
Thadiquithyris thadiquiensis
Foraminifera
 Involutinina - Trocholinidae
Trocholina sp.
Trocholina sp. Paalzow 1922
=Foram.
 Textulariina - Pfenderinidae
Kurnubia sp.
Kurnubia sp. Henson 1948
Crinoidea
 Millericrinida - Millericrinidae
Ceriocrinus sp.
Ceriocrinus sp. Sea lily
=Crinoidea,Koenig (1845) unpubl.,Agassiz (1836)
Echinoidea
 Irregularia - Clypeidae
Pseudopygurus sp. n. sp.
Pseudopygurus sp. n. sp. sea urchin
=n.sp.
 Cidaroida - Rhabdocidaridae
Rhabdocidaris mogharensis
Gastropoda
 Trochoidea - Trochidae
"Solarium sp." = Trochus (Solarium)
"Solarium sp." = Trochus (Solarium) top snail
 Vetigastropoda - Discohelicidae
Discohelix sp.
Discohelix sp. Dunker 1847 snail
 Architaenioglossa - Ampullinidae
Globularia sp.
Globularia sp. Swainson 1840 snail
 Pseudomelanoidea - Pseudomelaniidae
Bourguetia sp.
Bourguetia sp. Deshayes 1871 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
Nerinea sp.
Nerinea sp. Deshayes 1827 snail
Bivalvia
 Carditida - Astartidae
Coelopis cf. lunata
 Pholadomyida - Pholadomyidae
Pholadomya lirata, Homomya cf. gibbosa
Pholadomya lirata Sowerby 1818 clam
Homomya cf. gibbosa Sowerby 1814 clam
 Pholadida - Ceratomyidae
Ceratomya excentrica
Ceratomya excentrica Roemer 1836 clam
 Megalodontida - Dicerocardiidae
Pseudisocardia cf. macfadyeni
 Megalodontida - Ceratomyopsidae
Ceratomyopsis cf. arabica
 Cardiida - Pterocardiidae
Pterocardia buvignieri
 Mytilida - Mytilidae
Arcomytilus somaliensis, "Modiolus imbricatus" = Modiolus (Modiolus) imbricatus, Inoperna cf. sowerbyana
"Modiolus imbricatus" = Modiolus (Modiolus) imbricatus Sowerby 1818 mussel
 Arcida - Parallelodontidae
Parallelodon hirsonensis
Parallelodon hirsonensis d'Archiac 1843 clam
 Ostreida - Pinnidae
Trichites saussurei
 Ostreida - Gryphaeidae
Bilobissa sublobata, Gryphaea bilobata
Bilobissa sublobata Deshayes 1830 oyster
Gryphaea bilobata Sowerby 1835 oyster
 Pectinida - Limidae
Plagiostoma cf. subcardiiformis
Plagiostoma cf. subcardiiformis Greppin 1867 file clam
 Pectinida - Pectinoidae
Chlamys cf. curvivarians
Chlamys cf. curvivarians Dietrich 1933 scallop
Rhynchonellata
 Terebratulida - Loboidothyrididae
Striithyris somaliensis, Bihenithyris weiri
Striithyris somaliensis Muir-Wood 1935
Bihenithyris weiri Muir-Wood 1935
 Rhynchonellida - Tetrarhynchiidae
Kutchirhynchia indica
Kutchirhynchia indica d'Orbigny 1847