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

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Nautiloculinidae
Nautiloculina oolithica
Rhynchonellata - Terebratulida - Lissajousithyrididae
Monsardithyris ventricosa (Hartmann 1830)
Rhynchonellata - Terebratulida - Lobothyrididae
Tubithyris chouberti Rousselle 1965
Bivalvia - Mytilida - Mytilidae
Modiolus bipartitus Sowerby 1818
Inoperna cf. sowerbyana
Bivalvia - Ostreida - Eligmidae
Eligmus polytypus Eudes-Deslongchamps 1856
Bivalvia - Ostreida - Palaeolophidae
Lopha solitaria (Sowerby 1824)
synonym of Actinostreon gregareum
Bivalvia - Pectinida - Limidae
Plagiostoma cf. laeviusculum
Lima gigantea Boehm 1911
recombined as Plagiostoma gigantea
Plagiostoma gigantea Sowerby 1814
corrected as Plagiostoma giganteum
Bivalvia - Pectinida - Oxytomidae
Oxytoma cf. inaequivalis
original and current combination Avicula (Oxytoma)
Bivalvia - Pectinida - Pectinidae
Chlamys nattheimensis
Chlamys cf. textorius (Schlotheim 1820)
recombined as Chlamys textoria
Spondylopecten cf. subspinosus
Bivalvia - Pectinida - Entoliidae
Entolium cf. corneolum (Young and Bird 1828)
recombined as Entolium (Entolium) corneolum
Bivalvia - Pholadomyida - Pholadomyidae
Pholadomya somaliensis Cox 1935
recombined as Pholadomya (Bucardiomya) somaliensis
Homomya cf. gibbosa Sowerby 1814
Bivalvia - Megalodontida - Dicerocardiidae
Pseudisocardia cf. macfadyeni Cox 1935
Bivalvia - Pholadida - Ceratomyidae
Ceratomya cf. concentrica Sowerby 1822
Bivalvia - Lucinida - Lucinidae
Fimbria cf. lajoyei d'Archiac 1843
Bivalvia - Trigoniida - Trigoniidae
Trigonia ex gr. pullus Sowerby 1826
Gastropoda - Pleurotomariidae
Orbonella sp.
=Gastr.
    = Obornella sp. Cox 1959
Kiessling 2003
Cephalopoda - Ammonitida - Stephanoceratidae
Ermoceras magnificum Arkell 1952
Ermoceras runcinatum Arkell 1952
Ermoceras elegans Douvillé 1916
recombined as Ermoceras (Kosmermoceras) elegans
Ermoceras coronatoides (Douvillé 1916)
Ermoceras splendens Arkell 1952
Ermoceras sp. Douvillé 1916
=n.sp.3
Ermoceras deserti Douvillé 1916
Crinoidea - Millericrinida - Apiocrinitidae
Apiocrinites sp. Miller 1821
Echinoidea - Holectypoida - Holectypidae
Holectypus phelani
=phelani sp.
see common names

Geography
Country:Saudi Arabia
Coordinates: 22.6° North, 46.0° East (view map)
Paleocoordinates:3.2° South, 32.9° East
Basis of coordinate:stated in text
Geographic resolution:outcrop
Time
Period:Jurassic Epoch:Middle Jurassic
Stage:Bajocian 10 m.y. bin:Jurassic 4
Key time interval:Bajocian
Age range of interval:170.30000 - 168.30000 m.y. ago
Stratigraphy
Geological group:Shaqra Formation:Dhruma
Local section:Coupe de Khashm Ushayrah (As Sitarah) Local bed:D2,2
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:48105
Authorizer:F. Fursich, W. Kiessling Enterer:S. Hicks, W. Kiessling
Modifier:S. Hicks Research group:marine invertebrate
Created:2005-03-14 02:05:59 Last modified:2005-03-14 04:32:58
Access level:the public Released:2005-03-14 02:05:59
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]

Secondary references:

9159 W. Kiessling. 2003. Personal data. [W. Kiessling/W. Kiessling/W. Kiessling]