Shaqra Group (upper Dhruma D7 Hisyan Mb.1a) (Jurassic of Saudi Arabia)

Where: Saudi Arabia (24.9° N, 46.6° E: paleocoordinates 1.4° S, 34.3° E)

• coordinate stated in text

• outcrop-level geographic resolution

When: Hisyan Mb.1a 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 45547: authorized by Franz Fursich, entered by Simone Hicks on 03.11.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Anthozoa
 Scleractinia - Stylinidae
Stylina sp.
Stylina sp. Lamarck 1816 stony coral
Echinoidea
 Cidaroida -
Plegiocidaris sp.
Plegiocidaris sp. Pomel 1883 pencil urchin
 Stomopneustoida - Stomechinidae
Polycyphus parvituberculatus
 Pedinoida -
Farquharsonia somaliensis
 Irregularia -
Bothryopneustes orientalis
Bothryopneustes orientalis sea urchin
=Echin.
 Holectypoida - Holectypidae
Holectypus phelani
 Salenioida - Acrosaleniidae
Acrosalenia sp., Acrosalenia hemicrenulata, Heterosalenia ornata
Acrosalenia sp. Agassiz 1840 sea urchin
=sp.E
 Calycina -
Leioechinus namus
 Euechinoidea - Hemicidaridae
Sphaerotiaris sp., Pseudocidaris levis
Sphaerotiaris sp. Lambert and Thiéry 1914 sea urchin
=sp.B
Bivalvia
 Ostreida - Eligmidae
Eligmus cf. analites, Eligmus aff. weiri, Eligmus polytypus
Eligmus aff. weiri Cox 1935 oyster
Eligmus polytypus Eudes-Deslongchamps 1856 oyster
 Ostreida - Palaeolophidae
"Lopha solitaria" = Actinostreon gregareum
"Lopha solitaria" = Actinostreon gregareum Sowerby 1816 oyster
 Pectinida - Pectinoidae
Chlamys nattheimensis
 Pholadomyida - Pholadomyidae
Osteomya sp.
Osteomya sp. Moesch 1874 clam
Cephalopoda
 Ammonitida - Perisphinctidae
Grossouvria kontkiewiczi
Grossouvria kontkiewiczi Siemiradzki 1894 ammonite
Rhynchonellata
 Rhynchonellida - Tetrarhynchiidae
Daghanirhynchia sp., Burmirhynchia sp. n. sp.
Daghanirhynchia sp. Muir-Wood 1935
Burmirhynchia sp. n. sp. Buckman 1917
=n.sp.B
 Terebratulida - Zeilleriidae
Rugitela sp.
Foraminifera
 Lituolacea - Nautiloculinidae
Nautiloculina oolithica
 Involutinina - Trocholinidae
Trocholina elongata
Coccolithophyceae
 Braarudosphaerales - Polycyclolithaceae
"Tetralithus cf. gothicus" = Uniplanarius gothicus
"Tetralithus cf. gothicus" = Uniplanarius gothicus Deflandre 1959
=nannoflora
 Watznaueriales - Watznaueriaceae
"Watznaueria manivitae" = Watznaueria, "Ellipsagelosphaera communis" = Watznaueria, "Ellipsagelosphaera britannica" = Watznaueria, Cyclagelosphaera margereli, Diazomatolithus lehmani
"Watznaueria manivitae" = Watznaueria
=nannoflora
"Ellipsagelosphaera communis" = Watznaueria
=nannoflora
"Ellipsagelosphaera britannica" = Watznaueria
=nannoflora