Shaqra Group (upper Dhruma D7 Atash Mb.3) (Jurassic of Saudi Arabia)

Where: Saudi Arabia (24.2° N, 46.6° E: paleocoordinates 2.0° S, 34.0° E)

• coordinate stated in text

• outcrop-level geographic resolution

When: Atash Mb.3 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

•top of the reef limestone of Atash Mb.

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 45541: authorized by Franz Fursich, entered by Simone Hicks on 01.11.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Coccolithophyceae
 Zygodiscales - Zygodiscaceae
Zygodiscus sp.
Zygodiscus sp. Bramlette and Sullivan 1961
=nannoflora
 Watznaueriales - Watznaueriaceae
Cyclagelosphaera margereli, "Watznaueria manivitae" = Watznaueria, "Ellipsagelosphaera britannica" = Watznaueria, "Ellipsagelosphaera communis" = Watznaueria
"Watznaueria manivitae" = Watznaueria
=nannoflora
"Ellipsagelosphaera britannica" = Watznaueria
=nannoflora
"Ellipsagelosphaera communis" = Watznaueria
=nannoflora
 Eiffellithales - Chiastozygaceae
Zeugrhabdotus erectus
Zeugrhabdotus erectus Deflandre 1954
=nannoflora
 Stephanolithiales - Stephanolithiaceae
Stephanolithion bigoti
 Podorhabdales - Axopodorhabdaceae
Ethmorhabdus cf. gallicus
Ethmorhabdus cf. gallicus Noël 1965
=nannoflora
 Podorhabdales - Biscutaceae
Discorhabdus sp.
Discorhabdus sp. Noël 1965
=nannoflora
 Braarudosphaerales - Polycyclolithaceae
"Tetralithus cf. gothicus" = Uniplanarius gothicus
"Tetralithus cf. gothicus" = Uniplanarius gothicus Deflandre 1959
=nannoflora
Foraminifera
 Lituolacea - Nautiloculinidae
Nautiloculina oolithica
 Textulariina - Pfenderinidae
Steinekella crusei, Praekurnubia crusei
 Involutinina - Trocholinidae
Trocholina elongata
Anthozoa
 Scleractinia - Acrosmiliidae
Acrosmilia sp.
Acrosmilia sp. d'Orbigny 1849 stony coral
Echinoidea
 Holectypoida - Holectypidae
Holectypus phelani
 Euechinoidea - Hemicidaridae
Pseudocidaris levis, Pseudocidaris sp. n. sp.
Pseudocidaris sp. n. sp. sea urchin
=n.sp.1
 Pedinoida -
Farquharsonia somaliensis
 Stomopneustoida - Stomechinidae
Polycyphus parvituberculatus
Rhynchonellata
 Rhynchonellida - Tetrarhynchiidae
Burmirhynchia sp. n. sp.
Burmirhynchia sp. n. sp. Buckman 1917
=n.sp.B
 Terebratulida - Lobothyrididae
Tubithyris sp.
Tubithyris sp. Buckman 1917
 Terebratulida - Loboidothyrididae
"Cererithyris bihinensis" = Arabatia bihinensis
"Cererithyris bihinensis" = Arabatia bihinensis Weir 1929
Bivalvia
 Pectinida - Pectinoidae
Chlamys nattheimensis
 Ostreida - Eligmidae
Eligmus cf. analites, Eligmus polytypus, Eligmus aff. weiri
Eligmus polytypus Eudes-Deslongchamps 1856 oyster
Eligmus aff. weiri Cox 1935 oyster
 Ostreida - Palaeolophidae
"Lopha solitaria" = Actinostreon gregareum
"Lopha solitaria" = Actinostreon gregareum Sowerby 1816 oyster
 Pholadomyida - Pholadomyidae
Osteomya sp.
Osteomya sp. Moesch 1874 clam
Cephalopoda
 Nautilida - Paracenoceratidae
Aulacenoceras sp. n. sp.
Aulacenoceras sp. n. sp. Tinant 1987
=n.sp.A=Naut.
Gastropoda
 Sorbeoconcha - Acteoninidae
Acteonina sp.
Acteonina sp. d'Orbigny 1850 snail
=Gastr.
 Sorbeoconcha - Aporrhaidae
Harpagodes sp.
Harpagodes sp. Gill 1870 snail