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

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Rhynchonellata - Rhynchonellida - Tetrarhynchiidae
Kutchirhynchia gregoryi (Weir 1929)
Daghanirhynchia subversabilis (Weir 1925)
Rhynchonellata - Terebratulida - Loboidothyrididae
Cererithyris africana
Bihenithyris barringtoni Muir-Wood 1935
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 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
Eopecten inequistriatus
Chlamys nattheimensis
Chlamys splendens (Dollfus 1863)
Chlamys cf. curvivarians (Dietrich 1933)
Chlamys cf. textorius (Schlotheim 1820)
recombined as Chlamys textoria
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
Bilobissa sublobata (Deshayes 1830)
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 - Pholadida - Pleuromyidae
Pleuromya cf. alduini (Brongniart 1821)
Bivalvia - Cardiida - Cardiidae
Protocardia cf. subhillanum
Protocardia ex gr. hillanum
Bivalvia - Megalodontida - Ceratomyopsidae
Ceratomyopsis cf. arabica (Cox 1935)
Bivalvia - Megalodontida - Dicerocardiidae
Pseudisocardia cf. macfadyeni Cox 1935
Bivalvia - Carditida - Astartidae
Neocrassina ovata
Coelopis cf. lunata
Bivalvia - Trigoniida - Trigoniidae
Trigonia ex gr. pullus Sowerby 1826
Gastropoda - Aporrhaidae
Harpagodes sp. Gill 1870
Gastropoda - Pseudomelaniidae
Pseudomelania sp. Pictet and Campiche 1862
Gastropoda - Ampullinidae
Ampullospira sp. Harris 1897
spelled with current rank as Ampullina (Ampullospira)
Globularia sp. Swainson 1840
Gastropoda - Discohelicidae
Discohelix sp. Dunker 1847
Gastropoda - Heterostropha - Nerinellidae
Nerinella sp. Sharpe 1849
Gastropoda - Heterostropha - Nerineidae
Cossmannea sp. Pcelincev 1931
Nerinea sp. Deshayes 1827
Cephalopoda - Ammonitida
Erymnoceras coronatum (Bruguiere 1792)
replaced by Teloceras labrum
Cephalopoda - Ammonitida - Pachyceratidae
Erymnoceras sp. Hyatt 1900
Pachyerymnoceras sp.
Pachyerymnoceras cf. levantinense
Erymnoceras schloenbachi (Roman 1930)
recombined as Pachyceras schloenbachi
Crinoidea - Millericrinida - Millericrinidae
Millericrinus sp. d'Orbigny 1840
=sp.1
Ceriocrinus sp.
nomen nudum belonging to Millericrinus
=Crinoidea,Koenig (1845) unpubl.,Agassiz (1836)
Echinoidea - Salenioida - Acrosaleniidae
Recrosalenia somaliensis Currie 1935
Echinoidea
Bothryopneustes orientalis
=orientalis orientalis
Echinoidea - Hemicidaridae
Pseudocidaris sp.
=n.sp.2
Echinoidea - Pedinoida
Farquharsonia sp.
=n.sp.1
Nautiloculinidae
Nautiloculina oolithica
Trocholinidae
Trocholina sp. Paalzow 1922
=Foram.
Trocholina palastiniensis
=Foram.
see common names

Geography
Country:Saudi Arabia
Coordinates: 26.3° North, 44.8° East (view map)
Paleocoordinates:0.6° North, 33.6° 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 de Al Liqa Local bed:D7,a
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:48604
Authorizer:F. Fursich Enterer:S. Hicks
Modifier:S. Hicks Research group:marine invertebrate
Created:2005-03-24 04:44:49 Last modified:2005-03-24 06:44:50
Access level:the public Released:2005-03-24 04:44:48
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]