PBDB Collection

Shaqra Group (Dhruma Fm.) (Jurassic of Saudi Arabia)

Where: Saudi Arabia (23.1° N, 46.3° E: paleocoordinates 2.8° S, 33.4° E)

• coordinate stated in text

• outcrop-level geographic resolution

When: Hisyan Mb. Member (Dhruma Formation), Bathonian (168.3 - 166.1 Ma)

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

• The Dhruma Fm. essentially is composed of limestones and clayey rocks in its central outcrop zone but passes to detrial facies northwards and southwards.

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 48522: authorized by Franz Fursich, entered by Simone Hicks on 22.03.2005

Creative Commons license: CC BY (attribution)

Taxonomic list

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Bivalvia
Trigoniida - Trigoniidae	Trigonia ex gr. pullus Trigonia ex gr. pullus Sowerby 1826 clam
Carditida - Astartidae	Astarte supracorallina Astarte supracorallina clam
Lucinida - Mactromyidae	Mactromya cf. crassa Mactromya cf. crassa Agassiz 1845 clam
Pholadida - Pleuromyidae	Pleuromya cf. alduini Pleuromya cf. alduini Brongniart 1821 clam
Megalodontida - Ceratomyopsidae	Ceratomyopsis cf. arabica Ceratomyopsis cf. arabica Cox 1935 clam
Cardiida - Cardiidae	Protocardia ex gr. hillanum Protocardia ex gr. hillanum cockle
Cardiida - Pterocardiidae	Pterocardia buvignieri, Pterocardia pesbovi Pterocardia buvignieri clam Pterocardia pesbovi clam
Pholadomyida - Pholadomyidae	Homomya cf. gibbosa, "Pholadomya somaliensis" = Pholadomya (Bucardiomya) somaliensis, Pholadomya lirata Homomya cf. gibbosa Sowerby 1814 clam "Pholadomya somaliensis" = Pholadomya (Bucardiomya) somaliensis Cox 1935 clam Pholadomya lirata Sowerby 1818 clam
Thraciida - Thraciidae	Thracia cf. curtensata Thracia cf. curtensata clam
Ostreida - Gryphaeidae	Liostrea cf. hisingeri, Gryphaea costellata, Gryphaea balli, "Nanogyra nana" = Nanogyra (Nanogyra) nana Liostrea cf. hisingeri oyster Gryphaea costellata Douvillé 1916 oyster Gryphaea balli Stefanini 1925 oyster "Nanogyra nana" = Nanogyra (Nanogyra) nana Sowerby 1822 oyster
Ostreida - Eligmidae	Eligmus aff. weiri Eligmus aff. weiri Cox 1935 oyster
Ostreida - Palaeolophidae	"Lopha cf. marshii" = Actinostreon marshi, "Lopha gregarea" = Actinostreon gregareum, "Lopha solitaria" = Actinostreon gregareum "Lopha cf. marshii" = Actinostreon marshi Sowerby 1814 oyster "Lopha gregarea" = Actinostreon gregareum Sowerby 1816 oyster "Lopha solitaria" = Actinostreon gregareum Sowerby 1816 oyster
Ostreida - Pinnidae	Stegoconcha cf. muelleri Stegoconcha cf. muelleri oyster
Pectinida - Pectinoidae	Chlamys nattheimensis, Chlamys cf. curvivarians Chlamys nattheimensis scallop Chlamys cf. curvivarians Dietrich 1933 scallop
Pectinida - Oxytomidae	Oxytoma cf. inaequivalis Oxytoma cf. inaequivalis scallop
Arcida - Parallelodontidae	Parallelodon hirsonensis, Parallelodon rugosus Parallelodon hirsonensis d'Archiac 1843 clam Parallelodon rugosus Buckman 1845 clam
Mytilida - Mytilidae	"Modiolus imbricatus" = Modiolus (Modiolus) imbricatus, Arcomytilus somaliensis "Modiolus imbricatus" = Modiolus (Modiolus) imbricatus Sowerby 1818 mussel Arcomytilus somaliensis mussel
Rhynchonellata
Rhynchonellida - Tetrarhynchiidae	Daghanirhynchia daghaniensis Daghanirhynchia daghaniensis Muir-Wood 1935
Terebratulida - Loboidothyrididae	"Cererithyris bihinensis" = Arabatia bihinensis "Cererithyris bihinensis" = Arabatia bihinensis Weir 1929
Terebratulida - Eudesiidae	"Eudesia cardioides" = Eudesia (Sphriganaria) cardioides "Eudesia cardioides" = Eudesia (Sphriganaria) cardioides Douvillé 1916