Shaqra Group (Dhruma Fm.): Callovian, Saudi Arabia

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Anthozoa - Scleractinia - Microsolenidae
Chomatoseris orbulites (Lamouroux 1821)
Rhynchonellata - Rhynchonellida - Tetrarhynchiidae
Kutchirhynchia gregoryi (Weir 1929)
Daghanirhynchia daghaniensis Muir-Wood 1935
Rhynchonellata - Terebratulida - Eudesiidae
Flabellothyris dichotoma Kitchin 1900
Eudesia cardioides Douvillé 1916
recombined as Eudesia (Sphriganaria) cardioides
Rhynchonellata - Terebratulida - Loboidothyrididae
Cererithyris bihinensis (Weir 1929)
recombined as Arabatia bihinensis
Bivalvia - Nuculida - Nuculidae
Nucula cf. cuneiformis Sowerby 1840
recombined as Nucula (Palaeonucula) cuneiformis
Bivalvia - Mytilida - Mytilidae
Modiolus bipartitus Sowerby 1818
Modiolus imbricatus (Sowerby 1818)
recombined as Modiolus (Modiolus) imbricatus
Arcomytilus somaliensis
Inoperna cf. sowerbyana
Falcimytilus aff. suprajurensis (Cox 1925)
Bivalvia - Pectinida - Limidae
Plagiostoma cf. laeviusculum
Plagiostoma rigidum (Sowerby 1815)
recombined as Lima (Plagiostoma) rigida
Plagiostoma cf. subcardiiformis Greppin 1867
Bivalvia - Pectinida - Entoliidae
Entolium cf. corneolum (Young and Bird 1828)
recombined as Entolium (Entolium) corneolum
Bivalvia - Pectinida - Pectinidae
Chlamys nattheimensis
Chlamys splenaens
Chlamys cf. curvivarians (Dietrich 1933)
Camptonectes laminatus (Sowerby 1818)
Bivalvia - Ostreida - Gryphaeidae
Nanogyra nana (Sowerby 1822)
recombined as Nanogyra (Nanogyra) nana
Nanogyra cf. striata Smith 1817
synonym of Nanogyra (Palaeogyra) virgula
Gryphaea costellata (Douvillé 1916)
Gryphaea bilobata Sowerby 1835
Liostrea cf. hisingeri
Bivalvia - Ostreida - Eligmidae
Eligmus cf. analites
Bivalvia - Ostreida - Pinnidae
Trichites saussurei
Bivalvia - Ostreida - Palaeolophidae
Lopha gregarea (Sowerby 1816)
recombined as Actinostreon gregareum
Lopha solitaria (Sowerby 1824)
synonym of Actinostreon gregareum
Lopha cf. marshii (Sowerby 1814)
recombined as Actinostreon marshi
Bivalvia - Lucinida - Lucinidae
Fimbria cf. lajoyei d'Archiac 1843
Bivalvia - Lucinida - Mactromyidae
Mactromya cf. concentrica
Bivalvia - Thraciida - Thraciidae
Thracia cf. curtensata
Bivalvia - Pholadomyida - Pholadomyidae
Pholadomya lirata (Sowerby 1818)
Pholadomya protei (Brongniart 1821)
recombined as Pholadomya (Bucardiomya) protei
Homomya cf. gibbosa Sowerby 1814
Bivalvia - Pholadida - Ceratomyidae
Gresslya ex gr. gregaria (von Zieten 1833)
Ceratomya excentrica (Roemer 1836)
Ceratomya cf. concentrica Sowerby 1822
Bivalvia - Cardiida - Cardiidae
Protocardia ex gr. hillanum
Protocardia cf. subhillanum
Bivalvia - Megalodontida - Ceratomyopsidae
Ceratomyopsis cf. arabica (Cox 1935)
Bivalvia - Megalodontida - Dicerocardiidae
Pseudisocardia cf. macfadyeni Cox 1935
Bivalvia - Carditida - Astartidae
Neocrassina ovata
Bivalvia - Trigoniida - Trigoniidae
Trigonia ex gr. pullus Sowerby 1826
Cephalopoda - Nautilida - Paracenoceratidae
Paracenoceras sp. Spath 1927
=n.sp.B
Cephalopoda - Nautilida - Cymatoceratidae
Cymatonautilus collignoni Tinant 1969
Cephalopoda - Proplanulitidae
Proplanulitidae sp. Buckman 1921
=cf.Obtusicostites+cf.Kinkeliniceras=Ammon.
Cephalopoda - Ammonitida - Pachyceratidae
Rollierites sp. Jeannet 1951
=Ammo.,Fam.: Pachyceratidae
Erymnoceras sp. Hyatt 1900
Pachyerymnoceras sp.
Echinoidea - Stomopneustoida - Stomechinidae
Polycyphus arabicus
Echinoidea - Clypeidae
Pygurus smelliei
Echinoidea
Bothryopneustes orientalis
=orientalis orientalis=Echin.
Echinoidea - Pedinoida
Farquharsonia somaliensis
Echinoidea - Cidaroida - Rhabdocidaridae
Rhabdocidaris mogharensis
Globotextulariidae
Pseudomarssonella sp. Redmond 1965
Nautiloculinidae
Nautiloculina sp. Mohler 1938
Lituolida - Lituolidae
Ammobaculites sp. Cushman 1910
Nodosariata - Robertinida - Epistominidae
Epistomina sp.
see common names

Geography
Country:Saudi Arabia
Coordinates: 25.1° North, 45.7° East (view map)
Paleocoordinates:0.9° South, 33.7° East
Basis of coordinate:stated in text
Geographic resolution:outcrop
Time
Period:Jurassic Epoch:Middle Jurassic
Stage:Callovian 10 m.y. bin:Jurassic 5
Key time interval:Callovian
Age range of interval:165.30000 - 161.50000 m.y. ago
Stratigraphy
Geological group:Shaqra Formation:Dhruma Member:Hisyan Mb.
Local section:Coupe du Khashm Turab Local bed:D7,1
Local order:bottom to top
Lithology and environment
Primary lithology: lithified "limestone"
Includes fossils?Y
Environment:lagoonal/restricted shallow subtidal Tectonic setting:cratonic basin
Geology comments: The Dhruma Fm. essentially is composed of limestones and clayey rocks in its central outcrop zone but passes to detrial facies northwards and southwards.
Taphonomy
Size of fossils:macrofossils,microfossils
Collection methods and comments
Collection methods:bulk,mechanical,field collection
Reason for describing collection:biostratigraphic analysis
Metadata
Database number:48585
Authorizer:F. Fursich Enterer:S. Hicks
Modifier:S. Hicks Research group:marine invertebrate
Created:2005-03-24 02:18:47 Last modified:2005-03-24 04:18:47
Access level:the public Released:2005-03-24 02:18:45
Creative Commons license:CC BY
Reference information

Primary reference:
11728. 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]