Umm al-Rua’us Formation, Saudi Arabia - Abbass (1972): Ypresian, Saudi Arabia

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Echinoidea
Echinoidea indet. (Leske 1778)
Reptilia
Ancistrodon libycus
nomen dubium belonging to Crocopoda
Actinopteri - Tetraodontiformes - Eotrigonodontidae
Eotrigonodon serratus (Gervais 1852)
Actinopteri - Pycnodontiformes - Pycnodontidae
Pycnodus pellei
Chondrichthyes - Myliobatiformes - Myliobatidae
Myliobatis sp. Cuvier 1816
Chondrichthyes - Carcharhiniformes - Galeocerdidae
Galeocerdo latidens (Agassiz 1835)
Chondrichthyes - Carcharhiniformes - Hemigaleidae
Hemipristis serra Agassiz 1835
Chondrichthyes - Lamniformes - Otodontidae
Otodus obliquus Agassiz 1838
Chondrichthyes - Lamniformes - Lamnidae
Lamna rapax
Lamna libyca
Lamna sp. Cuvier 1816
Oxyrhina desori (Agassiz 1843)
synonym of Isurus oxyrinchus
Chondrichthyes - Heterodontiformes - Heterodontidae
Sphyrna prisca Agassiz 1843
recombined as Cestracion prisca
Rhynchonellata - Terebratulida - Cancellothyrididae
Terebratulina arabica Abbass 1972
Cephalopoda - Nautilida - Nautilidae
Nautilus subfleuriausianus d'Archiac 1850
recombined as Eutrephoceras subfleuriausianum
Gastropoda - Cycloneritida - Neritopsidae
Neritopsis faizae Abbass 1972
Gastropoda - Heterostropha - Architectonicidae
Architectonica picteti
Gastropoda - Vasidae
Euvasum frequens
misspelling Eovasum
Gastropoda - Turritellidae
Mesalia trochoides
Turritella (Zaria) sp. Gray 1847
Turritella (Peyrotia) sp. (Cossman 1912)
Gastropoda - Ampullinidae
Globularia (Globularia) hatimi Abbass 1972
Globularia (Globularia) jaspidea
Gastropoda - Epitoniidae
Amaea (Coniscala) brevicula
Gastropoda - Neogastropoda - Fasciolariidae
Clavilithes longaevus
Gastropoda - Neogastropoda - Melongenidae
Heligmotoma niloticum
Gastropoda - Neogastropoda - Cancellariidae
Cancellaria moharrami Abbass 1972
Spelt: Cacellaria
Cancellaria badrii Abbass 1972
Gastropoda - Neogastropoda - Conidae
Conolithus acutus
spelled with current rank as Conus (Conolithes)
Gastropoda - Neogastropoda - Marginellidae
Cryptospira sp.
Gastropoda - Strombidae
Rimella quoseibii Abbass 1972
Terebellum fusiform
Terebellum saudiensis Abbass 1972
Gastropoda - Rostellariidae
Calyptraphorus indicus
Semiterebellum inflatum Abbass 1972
Semiterebellum arabicum Abbass 1972
Gastropoda - Cypraeidae
Bernaya libyca (Oppenheim 1906)
recombined as Palaeocypraea (Palaeocypraea) libyca
Eucypraea ahmadi Abbass 1972
Bivalvia - Nuculida - Nuculidae
Nucula sp. Lamarck 1799
Nucula mixta Deshayes 1858
recombined as Nucula (Nucula) mixta
Nucula (Nucula) nejdensis Abbass 1972
Bivalvia - Mytilida - Mytilidae
Modiolus sp. (Lamarck 1801)
Bivalvia - Pectinida - Spondylidae
Spondylus sp. Linnaeus 1758
Bivalvia - Ostreida - Ostreidae
Ostrea sp. Linnaeus 1758
Bivalvia - Arcida - Arcidae
Arca articulata
Arca laudunensis Deshayes 1860
Arca obeidi Abbass 1972
Bivalvia - Cardiida - Sportellidae
Sportella yamanii Abbass 1972
Bivalvia - Cardiida - Cardiidae
Cardium formosum
Cardium sp. Linnaeus 1758
Cardium khowaiteri Abbass 1972
Bivalvia - Cardiida - Chamidae
Chama nejdensis Abbass 1972
Bivalvia - Cardiida - Veneridae
Meretrix shantii Abbass 1972
Bivalvia - Cardiida - Mesodesmatidae
Mesodesma elongata Abbass 1972
Bivalvia - Pholadida - Corbulidae
Corbula (Corbula) khalidi Abbass 1972
Corbula taheri Abbass 1972
Bivalvia - Pholadida - Raetomyidae
Raetomya minuta Abbass 1972
Bivalvia - Lucinida - Thyasiridae
Thyasira (Thyasira) rashidi Abbass 1972
Bivalvia - Lucinida - Lucinidae
Lucina (Miltha) depressa
spelled with current rank as Miltha
Lucina (Miltha) inflata Abbass 1972
Lucina (Miltha) decorata Wood 1850
Bivalvia - Carditida - Carditidae
Venericardia aegyptiaca
Cardita pulchra Deshayes 1858
recombined as Cyclocardia (Arcturellina) pulchra
Anthozoa - Scleractinia - Caryophylliidae
Trochocyathus sp. Milne-Edwards and Haime 1848
Paracyathus sp. Edwards and Haime 1848
Hexactinellida - Lychniscosa - Ventriculitidae
Ventriculites arabicus Abbass 1972
Demospongiae - Megalithistida - Carterellidae
Nematinion libycus
Nematinion saudiensis Abbass 1972
Nummulitidae
Nummulites planatus
Rotaliidae
Dictyoconoides kohaticus
Trigonodontidae
Trigonodon laevis
see common names

Geography
Country:Saudi Arabia State/province:Ash Sharqiyah
Coordinates: 26.4° North, 50.1° East (view map)
Paleocoordinates:12.7° North, 41.6° East
Basis of coordinate:based on nearby landmark
Geographic resolution:local area
Time
Period:Paleogene Epoch:Eocene
Stage:Ypresian 10 m.y. bin:Cenozoic 2
Key time interval:Ypresian
Age range of interval:56.00000 - 47.80000 m.y. ago
Stratigraphy
Formation:Umm al-Rua’us
Stratigraphic resolution:formation
Stratigraphy comments: A real mess! No lithostratigraphic name given, but literature search suggests that similar Ypressian age facies in the Dammam region belong to the Umm al-Rua’us Formation. The biostratigraphy in the manuscript is not clear, but foraminifera suggest a Ypresian age. Other faunal groups have less well constrained age ranges, with a lot of Danian molluscs.
Lithology and environment
Primary lithology:sideritic,gray,yellow lithified "shale"
Secondary lithology:sideritic,gray,yellow marl
Includes fossils?Y
Includes fossils?Y
Lithology description: Scattered patches of greyish yellow marls and shales of about 3 to 7 meters high. The beds include strikingly enormous quantities of limonitic biota either embedded or scattered around the outcrops.
Environment:marine indet.
Geology comments: No paleoenvironmental data reported.
Taphonomy
Modes of preservation:body,cast,original aragonite,original calcite,replaced with limonite
Size of fossils:macrofossils,microfossils
Collection methods and comments
Collection methods:field collection
Reason for describing collection:general faunal/floral analysis
Collection method comments: Specimens are deposited at the Faculty of Science Ain Shams, University of Cairo.
Taxonomic list comments:Representative of faunal groups from this locality.
Metadata
Database number:42459
Authorizer:A. Hendy Enterer:A. Hendy
Modifier:A. Hendy Research group:marine invertebrate
Created:2004-07-29 17:58:08 Last modified:2013-11-25 13:37:23
Access level:the public Released:2004-07-29 17:58:08
Creative Commons license:CC BY
Reference information

Primary reference:
11298. H. L. Abbass. 1972. Paleontological studies of some Saudi Arabian lower Tertiary fossils. Egyptian Journal of Geology 16(1):35-68 [A. Miller/A. Hendy/A. Hendy]