Shaqra Group (lower Dhruma D2,1b upper part) (Jurassic of Saudi Arabia)

Where: Saudi Arabia (24.2° N, 46.6° E: paleocoordinates 2.0° S, 34.1° E)

• coordinate stated in text

• outcrop-level geographic resolution

When: Dhruma Formation (Shaqra Group), Bajocian (170.3 - 168.3 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 45268: authorized by Franz Fursich, entered by Simone Hicks on 18.10.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Echinoidea
 Salenioida - Acrosaleniidae
Acrosalenia dhrumaensis, Acrosalenia sp.
Acrosalenia sp. Agassiz 1840 sea urchin
Rhynchonellata
 Rhynchonellida - Tetrarhynchiidae
Burmirhynchia sp. n. sp.
Burmirhynchia sp. n. sp. Buckman 1917
=n.sp.2
 Terebratulida - Zeilleriidae
Rugitela praebullata
 Terebratulida - Lobothyrididae
Tubithyris sp. n. sp., Tubithyris chouberti
Tubithyris sp. n. sp. Buckman 1917
=n.sp.1
Tubithyris chouberti Rousselle 1965
Cephalopoda
 Ammonitida - Stephanoceratidae
Ermoceras reineckeoides, Ermoceras sp. n. sp.
Ermoceras reineckeoides Arkell 1952 ammonite
Ermoceras sp. n. sp. Douvillé 1916 ammonite
=n.sp.1
 Ammonitida - Sonniniidae
Dorsetensia subtecta
Gastropoda
 Architaenioglossa - Ampullinidae
Globularia sp., Globularia hemisphaerica
Globularia sp. Swainson 1840 snail
Globularia hemisphaerica Roemer 1836 snail
Bivalvia
 Pectinida - Pectinoidae
Aequipecten sp.
Aequipecten sp. Fischer 1886 scallop
 Ostreida - Palaeolophidae
Actinostreon sp.
Actinostreon sp. Bayle 1878 oyster
=Lopha
 Ostreida - Eligmidae
Eligmus sp.
Eligmus sp. Eudes-Deslongchampes 1856 oyster
 Pholadomyida - Pholadomyidae
Pholadomya sp.
Pholadomya sp. Sowerby 1823 clam
Ostracoda
  -
Amicytheridea dhrumaensis
Amicytheridea dhrumaensis ostracod
=Ostrac.
 Platycopida - Cytherellidae
Cytherella cf. index
Coccolithophyceae
 Watznaueriales - Watznaueriaceae
Cyclagelosphaera margereli
Nodosariata
 Nodosariida - Nodosariidae
Dentalina sp.
Dentalina sp. d'Orbigny 1826
 Vaginulinida - Lagenidae
Lingulina sp.
Foraminifera
 Ataxophragmiacea - Globotextulariidae
Pseudomarssonella sp.
Pseudomarssonella sp. Redmond 1965