Djebel Keskess, level 9 (Jurassic of Algeria)

Where: Algeria (35.1° N, 2.2° E: paleocoordinates 26.2° N, 5.6° E)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Ataxioceras hypselocyclum ammonoid zone, Early/Lower Kimmeridgian (155.7 - 150.8 Ma)

• bed-level stratigraphic resolution

Environment/lithology: deep subtidal; lithified, coarse-grained, shelly/skeletal grainstone

• Coarse grainstones

Size class: macrofossils

Primary reference: M. Benest, F. Atrops, and B. Clavel. 1994. Les echinides du Kimméridgien inférieur des Monts de Chellala (ouest Algérien); révision, paléoenvironnement, et eustatisme. Geobios 27:61-71 [M. Clapham/M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 196454: authorized by Matthew Clapham, entered by Matthew Clapham on 15.09.2018

Creative Commons license: CC BY (attribution)

Taxonomic list

Foraminifera
 Textulariina - Orbitopsellidae
Demospongiae
 Axinellida - Cladocoropsidae
Cladocoropsis cf. mirabilis Felix 1907 demosponge
Echinoidea
 Euechinoidea - Hemicidaridae
Pseudocidaris thurmanni Agassiz 1840 sea urchin
 Cidaroida - Cidaridae
 Cidaroida - Diplocidaridae
Diplocidaris gigantea Agassiz 1840 pencil urchin