PBDB Collection

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

Where: Saudi Arabia (25.8° N, 45.3° E: paleocoordinates 0.0° N, 33.7° E)

• coordinate stated in text

• outcrop-level geographic resolution

When: Dhruma Formation (Shaqra Group), 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 48456: authorized by Franz Fursich, entered by Simone Hicks on 20.03.2005

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names

Foraminifera
Involutinina - Trocholinidae	Trocholina sp. Trocholina sp. Paalzow 1922 =Foram.
Spirillinina - Spirillinidae	Spirillina sp. Spirillina sp. Reuss 1862
Echinoidea
Salenioida - Acrosaleniidae	Acrosalenia arabica Acrosalenia arabica sea urchin
Holectypoida - Holectypidae	Holectypus phelani Holectypus phelani sea urchin
Bivalvia
Nuculanida - Nuculanidae	Nuculana ex gr. castor Nuculana ex gr. castor pointed nut clam
Nuculida - Nuculidae	"Nucula cf. cuneiformis" = Nucula (Palaeonucula) cuneiformis "Nucula cf. cuneiformis" = Nucula (Palaeonucula) cuneiformis Sowerby 1840 nut clam
Pholadomyida - Pholadomyidae	Homomya cf. gibbosa, Pholadomya lirata, Pholadomya cf. ovalis, "Pholadomya protei" = Pholadomya (Bucardiomya) protei Homomya cf. gibbosa Sowerby 1814 clam Pholadomya lirata Sowerby 1818 clam Pholadomya cf. ovalis Sowerby 1819 clam "Pholadomya protei" = Pholadomya (Bucardiomya) protei Brongniart 1821 clam
Thraciida - Thraciidae	Thracia cf. curtensata Thracia cf. curtensata clam
Pholadida - Ceratomyidae	Ceratomya excentrica Ceratomya excentrica Roemer 1836 clam
Megalodontida - Dicerocardiidae	Pseudisocardia cf. macfadyeni Pseudisocardia cf. macfadyeni Cox 1935 clam
Cardiida - Cardiidae	Protocardia ex gr. hillanum Protocardia ex gr. hillanum cockle
Lucinida - Mactromyidae	Mactromya cf. concentrica Mactromya cf. concentrica clam
Carditida - Astartidae	Neocrassina ovata, Coelopis cf. lunata Neocrassina ovata clam Coelopis cf. lunata clam
Trigoniida - Trigoniidae	Trigonia ex gr. pullus Trigonia ex gr. pullus Sowerby 1826 clam
Mytilida - Mytilidae	Arcomytilus somaliensis, Inoperna cf. sowerbyana Arcomytilus somaliensis mussel Inoperna cf. sowerbyana mussel
Pectinida - Pectinoidae	Chlamys nattheimensis, "Chlamys cf. textorius" = Chlamys textoria Chlamys nattheimensis scallop "Chlamys cf. textorius" = Chlamys textoria Schlotheim 1820 scallop
Pectinida - Limidae	Limatula gibbosa, Plagiostoma cf. laeviusculum Limatula gibbosa file clam Plagiostoma cf. laeviusculum file clam
Ostreida - Bakevelliidae	Gervillella cf. aviculcides Gervillella cf. aviculcides oyster
Ostreida - Pteriidae	Pteroperna cf. costulata Pteroperna cf. costulata pearl oyster
Ostreida - Palaeolophidae	"Lopha solitaria" = Actinostreon gregareum "Lopha solitaria" = Actinostreon gregareum Sowerby 1816 oyster
Ostreida - Gryphaeidae	Gryphaea costellata Gryphaea costellata Douvillé 1916 oyster
Ostreida - Eligmidae	Eligmus polytypus Eligmus polytypus Eudes-Deslongchamps 1856 oyster
Arcida - Parallelodontidae	Parallelodon hirsonensis Parallelodon hirsonensis d'Archiac 1843 clam