Shaqra Group (middle Dhruma D3,2) (Jurassic to of Saudi Arabia)

Where: Saudi Arabia (24.2° N, 46.6° E: paleocoordinates 1.9° S, 34.1° E)

• coordinate stated in text

• outcrop-level geographic resolution

When: Dhruma Formation (Shaqra Group), Bajocian to Bajocian (170.3 - 164.7 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 45303: authorized by Franz Fursich, entered by Simone Hicks on 19.10.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

Echinoidea
 Cidaroida - Rhabdocidaridae
 Salenioida - Acrosaleniidae
Acrosalenia sp. n. sp. Agassiz 1840 sea urchin
=n.sp.
 Calycina -
 Euechinoidea - Hemicidaridae
 Irregularia - Clypeidae
 Irregularia -
Bothryopneustes dhrumaensis sea urchin
=Echin.
 Holectypoida - Holectypidae
Rhynchonellata
 Rhynchonellida - Tetrarhynchiidae
Burmirhynchia moulani n. sp. Alméras 1987
 Terebratulida - Eudesiidae
"Eudesia magharensis" = Eudesia (Sphriganaria) magharensis
"Eudesia magharensis" = Eudesia (Sphriganaria) magharensis Farag 1960
 Terebratulida - Lobothyrididae
"Cererithyris wylliei" = Tubithyris wylliei, Tubithyris cf. jubaensis
"Cererithyris wylliei" = Tubithyris wylliei Weir 1929
Cephalopoda
 Ammonitida - Stephanoceratidae
Thambites planus Arkell 1952 ammonite
Gastropoda
 Tectibranchia - Akeridae
Akera sp. Muller 1776 snail
 Architaenioglossa - Ampullinidae
Globularia sp. Swainson 1840 snail
Bivalvia
 Ostreida - Eligmidae
Eligmus polytypus Eudes-Deslongchamps 1856 oyster
Anthozoa
 Scleractinia - Kobyastraeidae
 Scleractinia - Microsolenidae
Chomatoseris orbulites Lamouroux 1821 stony coral