PBDB Collection

Shaqra Group (upper Dhruma D7, Atash Mb.2a) (Jurassic of Saudi Arabia)

Where: Saudi Arabia (24.2° N, 46.6° E: paleocoordinates 2.0° S, 34.0° E)

• coordinate stated in text

• outcrop-level geographic resolution

When: Atash Mb.2a Member (Dhruma Formation), Callovian (166.1 - 163.5 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

•bioclastic and bioturbated limestone

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 45539: authorized by Franz Fursich, entered by Simone Hicks on 01.11.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names

Echinoidea
Cidaroida - Rhabdocidaridae	Rhabdocidaris orientalis Rhabdocidaris orientalis pencil urchin
Cidaroida -	Plegiocidaris sp. Plegiocidaris sp. Pomel 1883 pencil urchin
Salenioida - Acrosaleniidae	Heterosalenia ornata Heterosalenia ornata sea urchin
Holectypoida - Holectypidae	Holectypus phelani Holectypus phelani sea urchin
Euechinoidea - Hemicidaridae	Pseudocidaris levis, Sphaerotiaris sp. Pseudocidaris levis sea urchin Sphaerotiaris sp. Lambert and Thiéry 1914 sea urchin
Crinoidea
Isocrinida - Isocrinidae	Balanocrinus sp. Balanocrinus sp. Agassiz 1847 Sea lily
Rhynchonellata
Terebratulida - Eudesiidae	"Eudesia cardioides" = Eudesia (Sphriganaria) cardioides "Eudesia cardioides" = Eudesia (Sphriganaria) cardioides Douvillé 1916
Terebratulida - Loboidothyrididae	"Cererithyris bihinensis" = Arabatia bihinensis "Cererithyris bihinensis" = Arabatia bihinensis Weir 1929
Bivalvia
Pholadomyida - Pholadomyidae	Pholadomya cf. aubryi, Homomya cf. gibbosa Pholadomya cf. aubryi Douville 1886 clam Homomya cf. gibbosa Sowerby 1814 clam
Megalodontida - Ceratomyopsidae	Ceratomyopsis cf. arabica Ceratomyopsis cf. arabica Cox 1935 clam
Pholadida - Pleuromyidae	Pleuromya cf. alduini Pleuromya cf. alduini Brongniart 1821 clam
Pholadida - Ceratomyidae	Ceratomya excentrica Ceratomya excentrica Roemer 1836 clam
Mytilida - Mytilidae	Arcomytilus laitmairensis, Modiolus bipartitus, Inoperna plicata Arcomytilus laitmairensis de Loriol 1883 mussel Modiolus bipartitus Sowerby 1818 mussel Inoperna plicata mussel
Ostreida - Palaeolophidae	"Lopha solitaria" = Actinostreon gregareum, "Lopha cf. marshii" = Actinostreon marshi "Lopha solitaria" = Actinostreon gregareum Sowerby 1816 oyster "Lopha cf. marshii" = Actinostreon marshi Sowerby 1814 oyster
Ostreida - Gryphaeidae	Gryphaea costellata, Gryphaea bilobata Gryphaea costellata Douvillé 1916 oyster Gryphaea bilobata Sowerby 1835 oyster
Ostreida - Eligmidae	Eligmus cf. analites, Eligmus aff. rollandi, Eligmus aff. weiri Eligmus cf. analites oyster Eligmus aff. rollandi Douvillé 1907 oyster Eligmus aff. weiri Cox 1935 oyster
Ostreida - Pinnidae	Trichites saussurei Trichites saussurei oyster
Pectinida - Oxytomidae	"Oxytoma cf. inaequivalvis" = Oxytoma inequivalvis "Oxytoma cf. inaequivalvis" = Oxytoma inequivalvis Sowerby 1819 scallop
Pectinida - Limidae	Plagiostoma cf. subcardiiformis, Limatula gibbosa Plagiostoma cf. subcardiiformis Greppin 1867 file clam Limatula gibbosa file clam
Pectinida - Pectinoidae	Camptonectes cf. browni, Chlamys nattheimensis, Chlamys cf. curvivarians, Eopecten inequistriatus Camptonectes cf. browni Cox 1935 scallop Chlamys nattheimensis scallop Chlamys cf. curvivarians Dietrich 1933 scallop Eopecten inequistriatus scallop
Foraminifera
Lituolacea - Nautiloculinidae	Nautiloculina oolithica Nautiloculina oolithica
Involutinina - Trocholinidae	Trocholina elongata Trocholina elongata =Foram.