Derachra (Jurassic of Tunisia)

Where: Tunisia (32.6° N, 10.3° E: paleocoordinates 21.1° N, 11.3° E)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Tataouine Formation, Early/Lower Callovian (164.7 - 161.2 Ma)

• group of beds-level stratigraphic resolution

Environment/lithology: shallow subtidal; lithified limestone and lithified marl

Size class: macrofossils

Preservation: cast

Primary reference: L. R. Cox. 1969. Gasteropodes Jurassiques du Sud-Est Tunisien [Jurassic gastropods from SE Tunisia]. Annales de Paleontologie, Invertebres 55(2):241-268 [W. Kiessling/U. Merkel]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 100389: authorized by Wolfgang Kiessling, entered by Uta Merkel on 09.12.2010

Creative Commons license: CC BY (attribution)

Taxonomic list

Gastropoda
 Murchisoniina - Zygopleuridae
Zygopleura tunisiensis n. sp. Cox 1969 snail
 Trochoidea - Ataphridae
Ataphrus labadyei d'Archiac 1850 snail
 Vetigastropoda - Discohelicidae
Discohelix tunisiensis n. sp. Cox 1969 snail
 Architaenioglossa - Ampullinidae
Globularia michelini, "Ampullospira stricklandi" = Ampullina (Ampullospira)
"Ampullospira stricklandi" = Ampullina (Ampullospira) snail
 Cerithioidea - Cryptaulacidae
Exelissa strangulata, "Procerithium (Xystrella) protortile" = Cryptaulax protortile
"Procerithium (Xystrella) protortile" = Cryptaulax protortile Cox 1965 snail
 Sorbeoconcha - Aporrhaidae
? Dicroloma sp. Gabb 1868 snail
Quadrinervus elegans Piette 1867 snail