PBDB Collection

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

Where: Saudi Arabia (22.4° N, 46.4° E: paleocoordinates 3.5° S, 33.1° 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.

• on top the limestones are intraclastic

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 47875: authorized by Franz Fursich, entered by Simone Hicks on 06.03.2005

Creative Commons license: CC BY (attribution)

Taxonomic list

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Foraminifera
Textulariina - Pfenderinidae	Kurnubia bramkampi Kurnubia bramkampi
Involutinina - Trocholinidae	Trocholina palastiniensis Trocholina palastiniensis =Foram.
Crinoidea
Isocrinida - Isocrinidae	Balanocrinus sp. Balanocrinus sp. Agassiz 1847 Sea lily
Millericrinida - Millericrinidae	Millericrinus sp. Millericrinus sp. d'Orbigny 1840 Sea lily =aff.insignis?
Millericrinida - Apiocrinitidae	Apiocrinites sp. Apiocrinites sp. Miller 1821 Sea lily
Rhynchonellata
Rhynchonellida - Tetrarhynchiidae	Daghanirhynchia daghaniensis Daghanirhynchia daghaniensis Muir-Wood 1935
Terebratulida - Loboidothyrididae	Bihenithyris barringtoni Bihenithyris barringtoni Muir-Wood 1935
Cephalopoda
Ammonitida - Pachyceratidae	Pachyceratidae sp., Pachyerymnoceras sp. Pachyceratidae sp. Buckman 1918 ammonite =1.s.,Ammo., (Buckmann 1918) Pachyerymnoceras sp. ammonite
Bivalvia
Trigoniida - Trigoniidae	Trigonia ex gr. pullus Trigonia ex gr. pullus Sowerby 1826 clam
Megalodontida - Ceratomyopsidae	Ceratomyopsis cf. arabica Ceratomyopsis cf. arabica Cox 1935 clam
Cardiida - Pterocardiidae	Pterocardia pesbovi Pterocardia pesbovi clam
Pholadida - Pleuromyidae	Pleuromya cf. alduini Pleuromya cf. alduini Brongniart 1821 clam
Pholadida - Ceratomyidae	Ceratomya excentrica Ceratomya excentrica Roemer 1836 clam
Pholadomyida - Pholadomyidae	Osteomya cf. dilatata, Pholadomya lirata, "Pholadomya protei" = Pholadomya (Bucardiomya) protei Osteomya cf. dilatata clam Pholadomya lirata Sowerby 1818 clam "Pholadomya protei" = Pholadomya (Bucardiomya) protei Brongniart 1821 clam
Lucinida - Mactromyidae	Mactromya concentrica, Mactromya cf. crassa Mactromya concentrica clam Mactromya cf. crassa Agassiz 1845 clam
Ostreida - Gryphaeidae	"Nanogyra nana" = Nanogyra (Nanogyra) nana, Gryphaea costellata, Gryphaea balli, Liostrea sublamellosa "Nanogyra nana" = Nanogyra (Nanogyra) nana Sowerby 1822 oyster Gryphaea costellata Douvillé 1916 oyster Gryphaea balli Stefanini 1925 oyster Liostrea sublamellosa Dunker 1846 oyster
Ostreida - Palaeolophidae	"Lopha solitaria" = Actinostreon gregareum "Lopha solitaria" = Actinostreon gregareum Sowerby 1816 oyster
Pectinida - Oxytomidae	Oxytoma cf. inaequivalis Oxytoma cf. inaequivalis scallop
Pectinida - Pectinoidae	Chlamys nattheimensis Chlamys nattheimensis scallop
Arcida - Parallelodontidae	Parallelodon rugosus Parallelodon rugosus Buckman 1845 clam
Mytilida - Mytilidae	Arcomytilus somaliensis, Arcomytilus laitmairensis, Inoperna plicata Arcomytilus somaliensis mussel Arcomytilus laitmairensis de Loriol 1883 mussel Inoperna plicata mussel