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

Where: Saudi Arabia (25.5° N, 45.0° E: paleocoordinates 0.2° S, 33.4° 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 48136: authorized by Franz Fursich, entered by Simone Hicks on 15.03.2005, edited by Wolfgang Kiessling

Creative Commons license: CC BY (attribution)

Taxonomic list

unclassified
  -
Ovalastracopsis sp.
=n.sp.=Hexac.
Echinoidea
 Calycina -
 Irregularia -
Bothryopneustes arabica sea urchin
=Echin.
Cephalopoda
 Ammonitida - Stephanoceratidae
Ermoceras sp. Douvillé 1916 ammonite
=n.sp.
"Ermoceras elegans" = Ermoceras (Kosmermoceras) elegans Douvillé 1916 ammonite
Ermoceras aulacostephanus Arkell 1952 ammonite
Ermoceras runcinatum Arkell 1952 ammonite
Thamboceras sp. Douvillé 1916 ammonite
=n.sp.
Ermoceras splendens Arkell 1952 ammonite
 Nautilida - Cenoceratidae
Metacenoceras sp. Tinant 1984 nautiloid
=n.sp.A=Naut.
Gastropoda
 Architaenioglossa - Ampullinidae
Globularia sp. Swainson 1840 snail
 Vetigastropoda - Discohelicidae
Discohelix sp. Dunker 1847 snail
Bivalvia
 Pholadomyida - Pholadomyidae
Homomya cf. gibbosa Sowerby 1814 clam
 Cardiida - Quenstedtiidae
Rhynchonellata
 Rhynchonellida - Tetrarhynchiidae
Burmirhynchia termierae Rousselle 1965
Anthozoa
 Scleractinia - Andemantastraeidae
Ovalastraeopsis sp. Alloiteau 1958 stony coral
=n.sp.=Hexac.
 Scleractinia - Zardinophyllidae
Epismiliopsis sp. Alloiteau 1952 stony coral
=n.sp.1
 Scleractinia - Latomeandridae
Fungiastraea sp. Alloiteau 1952 stony coral
=n.sp. A
 Scleractinia - Caryophylliidae
Discocyathus sp. Milne-Edwards and Haime 1848 stony coral
=n.sp.