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

Where: Saudi Arabia (26.9° N, 44.0° E: paleocoordinates 1.6° N, 33.3° 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 48447: authorized by Franz Fursich, entered by Simone Hicks on 20.03.2005

Creative Commons license: CC BY (attribution)

Taxonomic list

unclassified
  -
Anthozoa
 Scleractinia - Andemantastraeidae
Andemantastraea gaultierensis Koby 1906 stony coral
 Scleractinia - Haplaraeidae
Astraraea amorpha stony coral
 Scleractinia - Montlivaltiidae
Montlivaltia sp. Lamouroux 1821 stony coral
 Scleractinia - Microsolenidae
Chomatoseris sp. Thomas 1935 stony coral
Chomatoseris orbulites Lamouroux 1821 stony coral
Chomatoseris jacobi Alloiteau 1945 stony coral
Genabacia stellifera d'Archiac 1843 stony coral
 Scleractinia - Thamnasteriidae
Cephalopoda
 Ammonitida - Tulitidae
Tulites cf. arabicus Arkell 1952 ammonite
Gastropoda
 Vetigastropoda - Discohelicidae
Discohelix sp. Dunker 1847 snail
 Pleurotomarioidea - Pleurotomariidae
Pleurotomaria sp. Defrance 1826 snail
 Architaenioglossa - Ampullinidae
Globularia sp. Swainson 1840 snail
 Sorbeoconcha - Procerithiidae
Procerithium sp. Cossmann 1902 snail
 Heterostropha - Cylindrobullinidae
"Cylindrites sp." = Rugalindrites
"Cylindrites sp." = Rugalindrites Gründel and Nützel 2012 snail
 Heterostropha - Nerinellidae
Nerinella sp. Sharpe 1849 snail
=sp.1
 Heterostrophia -
"Nerinea bruntrutana" = Ptygmatis pseudobruntrutana Gemmellaro 1865 snail
Bactroptyxis sp. Cossmann 1896 snail
 Opisthobranchia - Cylichnidae
Cylichna sp. Lovén 1846 snail
Bivalvia
 Pectinida - Limidae
"Plagiostoma gigantea" = Plagiostoma giganteum Sowerby 1814 file clam
Plagiostoma cf. subcardiiformis Greppin 1867 file clam
 Pectinida - Entoliidae
"Entolium cf. corneolum" = Entolium (Entolium) corneolum
"Entolium cf. corneolum" = Entolium (Entolium) corneolum Young and Bird 1828 scallop
 Pectinida - Pectinoidae
"Chlamys cf. textorius" = Chlamys textoria Schlotheim 1820 scallop
Camptonectes laminatus Sowerby 1818 scallop
 Ostreida - Palaeolophidae
"Lopha solitaria" = Actinostreon gregareum
"Lopha solitaria" = Actinostreon gregareum Sowerby 1816 oyster
 Ostreida - Gryphaeidae
Gryphaea costellata Douvillé 1916 oyster
 Lucinida - Lucinidae
Fimbria cf. lajoyei d'Archiac 1843 clam
 Lucinida - Mactromyidae
 Pholadomyida - Pholadomyidae
Pholadomya lirata Sowerby 1818 clam
"Pholadomya protei" = Pholadomya (Bucardiomya) protei Brongniart 1821 clam
Homomya cf. gibbosa Sowerby 1814 clam
 Thraciida - Thraciidae
 Megalodontida - Dicerocardiidae
 Megalodontida - Ceratomyopsidae
 Cardiida - Cardiidae
 Carditida - Astartidae
 Trigoniida - Trigoniidae
Trigonia ex gr. pullus Sowerby 1826 clam
 Nuculida - Nuculidae
"Nucula cf. cuneiformis" = Nucula (Palaeonucula) cuneiformis
"Nucula cf. cuneiformis" = Nucula (Palaeonucula) cuneiformis Sowerby 1840 nut clam
 Nuculanida - Nuculanidae
Nuculana ex gr. castor pointed nut clam
Rhynchonellata
 Rhynchonellida - Tetrarhynchiidae
Burmirhynchia sp. Buckman 1917
=n.sp.A
 Terebratulida - Loboidothyrididae
"Cererithyris bihinensis" = Arabatia bihinensis
"Cererithyris bihinensis" = Arabatia bihinensis Weir 1929
 Terebratulida - Lobothyrididae