Dakatch (Juba Limestone) (Jurassic of Somalia)

Also known as Dikatch

Where: Somalia (1.8° N, 42.3° E: paleocoordinates 19.2° S, 24.1° E)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Juba Limestone Formation, Late/Upper Oxfordian (161.2 - 155.7 Ma)

• Oxfordian-Corallian based on belemnites and C. helvetica.

• group of beds-level stratigraphic resolution

Environment/lithology: lithified, shelly/skeletal, blue limestone

• bluish rubbly, very fossiliferous limestone

Size class: macrofossils

Preservation: cast

Collected by V.G. Glenday

• Repository: Hunterian Museum

Primary reference: J. Weir. 1929. Jurassic Fossils from Jubaland, East Africa, Collected by V. G. Glenday, And the Jurassic Geology of Somaliland. Monographs of the Geological Department of the Hunterian Museum, Glasgow University 1-63 [M. Clapham/M. Manojlovic]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 161487: authorized by Matthew Clapham, entered by Marko Manojlovic on 06.09.2014

Creative Commons license: CC BY (attribution)

Taxonomic list

Rhynchonellata
 Terebratulida - Zeilleriidae
Aulacothyris jubaensis n. sp. Weir 1929
 Terebratulida - Lobothyrididae
"Loboidothyris jubaensis n. sp." = Tubithyris jubaensis
"Loboidothyris jubaensis n. sp." = Tubithyris jubaensis Weir 1929
Loboidothyris ? jubaensis nov.
Bivalvia
 Ostreida - Gryphaeidae
"Exogyra nana" = Nanogyra (Nanogyra) nana Sowerby 1822 oyster
3 lower valves, 1 upper valve
Exogyra cf. wetzleri Boehm 1882 oyster
 Mytilida - Mytilidae
Mytilus (Pharomytilus) glendayi n. sp. Weir 1929 mussel
 Pholadida - Ceratomyidae
Ceratomya cf. obtusa Gerber 1918 clam
Ceratomya sp. juv. cf. obtusa (cast of a young shell)
 Megalodontida - Ceratomyopsidae
Ceromyopsis helvetica de Loriol 1897 clam
all crushed except for a left valve
 Cardiida - Kalenteridae
Myoconcha ? sp. Sowerby 1824 clam
 Cardiida - Cardiidae
Cardium bottegoi d'Ossat 1900 cockle
valve
 Thraciida - Thraciidae
Thracia viceliacensis d'Orbigny 1850 clam
 Lucinida - Mactromyidae
Mactromya rugosa Roemer 1836 clam