PBDB Collection

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

Where: Saudi Arabia (25.1° N, 45.7° E: paleocoordinates 0.9° S, 33.7° E)

• coordinate stated in text

• outcrop-level geographic resolution

When: Hisyan Mb. 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.

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 48585: authorized by Franz Fursich, entered by Simone Hicks on 24.03.2005

Creative Commons license: CC BY (attribution)

Taxonomic list

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Anthozoa
Scleractinia - Comoseridae	Chomatoseris orbulites Chomatoseris orbulites Lamouroux 1821 stony coral
Echinoidea
Cidaroida - Rhabdocidaridae	Rhabdocidaris mogharensis Rhabdocidaris mogharensis pencil urchin
Stomopneustoida - Stomechinidae	Polycyphus arabicus Polycyphus arabicus sea urchin
Irregularia - Clypeidae	Pygurus smelliei Pygurus smelliei sea urchin
Irregularia -	Bothryopneustes orientalis Bothryopneustes orientalis sea urchin =orientalis orientalis=Echin.
Pedinoida -	Farquharsonia somaliensis Farquharsonia somaliensis sea urchin
Rhynchonellata
Rhynchonellida - Tetrarhynchiidae	Daghanirhynchia daghaniensis, Kutchirhynchia gregoryi Daghanirhynchia daghaniensis Muir-Wood 1935 Kutchirhynchia gregoryi Weir 1929
Terebratulida - Loboidothyrididae	"Cererithyris bihinensis" = Arabatia bihinensis "Cererithyris bihinensis" = Arabatia bihinensis Weir 1929
Terebratulida - Eudesiidae	Flabellothyris dichotoma, "Eudesia cardioides" = Eudesia (Sphriganaria) cardioides Flabellothyris dichotoma Kitchin 1900 "Eudesia cardioides" = Eudesia (Sphriganaria) cardioides Douvillé 1916
Cephalopoda
Ammonoidea - Proplanulitidae	Proplanulitidae sp. Proplanulitidae sp. Buckman 1921 ammonite =cf.Obtusicostites+cf.Kinkeliniceras=Ammon.
Ammonitida - Pachyceratidae	Rollierites sp., Pachyerymnoceras sp., Erymnoceras sp. Rollierites sp. Jeannet 1951 ammonite =Ammo.,Fam.: Pachyceratidae Pachyerymnoceras sp. ammonite Erymnoceras sp. Hyatt 1900 ammonite
Nautilida - Cymatoceratidae	Cymatonautilus collignoni Cymatonautilus collignoni Tinant 1969
Nautilida - Paracenoceratidae	Paracenoceras sp. Paracenoceras sp. Spath 1927 =n.sp.B
Bivalvia
Nuculida - Nuculidae	"Nucula cf. cuneiformis" = Nucula (Palaeonucula) cuneiformis "Nucula cf. cuneiformis" = Nucula (Palaeonucula) cuneiformis Sowerby 1840 nut clam
Mytilida - Mytilidae	Falcimytilus aff. suprajurensis, "Modiolus imbricatus" = Modiolus (Modiolus) imbricatus, Modiolus bipartitus, Arcomytilus somaliensis, Inoperna cf. sowerbyana Falcimytilus aff. suprajurensis Cox 1925 mussel "Modiolus imbricatus" = Modiolus (Modiolus) imbricatus Sowerby 1818 mussel Modiolus bipartitus Sowerby 1818 mussel Arcomytilus somaliensis mussel Inoperna cf. sowerbyana mussel
Ostreida - Pinnidae	Trichites saussurei Trichites saussurei oyster
Ostreida - Eligmidae	Eligmus cf. analites Eligmus cf. analites oyster
Ostreida - Gryphaeidae	Liostrea cf. hisingeri, Gryphaea bilobata, Gryphaea costellata, "Nanogyra cf. striata" = Nanogyra (Palaeogyra) virgula, "Nanogyra nana" = Nanogyra (Nanogyra) nana Liostrea cf. hisingeri oyster Gryphaea bilobata Sowerby 1835 oyster Gryphaea costellata Douvillé 1916 oyster "Nanogyra cf. striata" = Nanogyra (Palaeogyra) virgula Deshayes 1831 oyster "Nanogyra nana" = Nanogyra (Nanogyra) nana Sowerby 1822 oyster
Ostreida - Palaeolophidae	"Lopha gregarea" = Actinostreon gregareum, "Lopha solitaria" = Actinostreon gregareum, "Lopha cf. marshii" = Actinostreon marshi "Lopha gregarea" = Actinostreon gregareum Sowerby 1816 oyster "Lopha solitaria" = Actinostreon gregareum Sowerby 1816 oyster "Lopha cf. marshii" = Actinostreon marshi Sowerby 1814 oyster
Pectinida - Entoliidae	"Entolium cf. corneolum" = Entolium (Entolium) corneolum "Entolium cf. corneolum" = Entolium (Entolium) corneolum Young and Bird 1828 scallop
Pectinida - Limidae	Plagiostoma cf. laeviusculum, Plagiostoma cf. subcardiiformis, "Plagiostoma rigidum" = Lima (Plagiostoma) rigida Plagiostoma cf. laeviusculum file clam Plagiostoma cf. subcardiiformis Greppin 1867 file clam "Plagiostoma rigidum" = Lima (Plagiostoma) rigida Sowerby 1815 file clam
Pectinida - Pectinoidae	Camptonectes laminatus, Chlamys nattheimensis, Chlamys splenaens, Chlamys cf. curvivarians Camptonectes laminatus Sowerby 1818 scallop Chlamys nattheimensis scallop Chlamys splenaens scallop Chlamys cf. curvivarians Dietrich 1933 scallop
Trigoniida - Trigoniidae	Trigonia ex gr. pullus Trigonia ex gr. pullus Sowerby 1826 clam
Carditida - Astartidae	Neocrassina ovata Neocrassina ovata clam
Lucinida - Lucinidae	Fimbria cf. lajoyei Fimbria cf. lajoyei d'Archiac 1843 clam
Lucinida - Mactromyidae	Mactromya cf. concentrica Mactromya cf. concentrica clam
Pholadomyida - Pholadomyidae	Homomya cf. gibbosa, "Pholadomya protei" = Pholadomya (Bucardiomya) protei, Pholadomya lirata Homomya cf. gibbosa Sowerby 1814 clam "Pholadomya protei" = Pholadomya (Bucardiomya) protei Brongniart 1821 clam Pholadomya lirata Sowerby 1818 clam
Thraciida - Thraciidae	Thracia cf. curtensata Thracia cf. curtensata clam
Cardiida - Cardiidae	Protocardia ex gr. hillanum, Protocardia cf. subhillanum Protocardia ex gr. hillanum cockle Protocardia cf. subhillanum cockle
Megalodontida - Ceratomyopsidae	Ceratomyopsis cf. arabica Ceratomyopsis cf. arabica Cox 1935 clam
Megalodontida - Dicerocardiidae	Pseudisocardia cf. macfadyeni Pseudisocardia cf. macfadyeni Cox 1935 clam
Pholadida - Ceratomyidae	Ceratomya excentrica, Ceratomya cf. concentrica, Gresslya ex gr. gregaria Ceratomya excentrica Roemer 1836 clam Ceratomya cf. concentrica Sowerby 1822 clam Gresslya ex gr. gregaria von Zieten 1833 clam
Nodosariata
Robertinida - Epistominidae	Epistomina sp. Epistomina sp.
Foraminifera
Ataxophragmiacea - Globotextulariidae	Pseudomarssonella sp. Pseudomarssonella sp. Redmond 1965
Lituolacea - Nautiloculinidae	Nautiloculina sp. Nautiloculina sp. Mohler 1938
Lituolida - Lituolidae	Ammobaculites sp. Ammobaculites sp. Cushman 1910