Basal Pragian Claystone and Marl (Unit 5) at Ben Zireg, Bechar Basin (Devonian of Algeria)

Where: Algeria (31.9° N, 1.9° W: paleocoordinates 59.3° S, 33.0° E)

• coordinate based on political unit

• local area-level geographic resolution

When: Saheb el Djir Formation, Pragian (410.8 - 407.6 Ma)

• Basal Pragian; Maghnini & Kennache (2017: Étude sedimentologique du Devonien Inferieur dans la région de Bechar Oued Namous) give this as Formation argilo-calcaire de Saheb El-Djir.

• group of beds-level stratigraphic resolution

Environment/lithology: offshore; claystone and silty marl

• SEP environmental call based on given info and regional context
• "Light claystones [Tonsteine] and marl (silty in part) with rare intercalated, tentaculite-rich banks of gray limestone"

Size class: macrofossils

Primary reference: G. K. B. Alberti. 1983. Trilobiten des juengeren Siluriums sowie des Unter-und Mittel-devons IV. Senckenbergiana Lethaea 64(1):1-87 [M. Foote/M. Foote/M. Uhen]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 27161: authorized by Michael Foote, entered by Michael Foote on 20.11.2002

Creative Commons license: CC BY (attribution)

Taxonomic list

• Emphasis is on trilobites and stratigraphically useful nowakiids.
Show authors, comments, and common names
Tentaculita
 Homoctenida - Paranowakiidae
Paranowakia geinitziana
Trilobita
 Proetida - Proetidae
? Schaderthalaspis cf. greilingi, Eopiriproetus cf. grossi, Erbenaspis cf. erbeni, Prodrevermannia jaegeri
? Schaderthalaspis cf. greilingi Alberti 1969 trilobite
Eopiriproetus cf. grossi Alberti 1966 trilobite
Prodrevermannia jaegeri Alberti 1964 trilobite
 Phacopida - Phacopidae
Afrops larvifer n. gen. n. sp., ? Denckmannites morator n. sp., Phacops (Prokops) benziregensis, ? Plagiolaria senex n. sp.
Afrops larvifer n. gen. n. sp. trilobite
? Denckmannites morator n. sp. trilobite
? Plagiolaria senex n. sp. trilobite
 Phacopida - Dalmanitidae
Odontochile "sp. A", Odontochile ("n. sg. A") "sp. B"
Odontochile "sp. A" Hawle and Corda 1847 trilobite
Odontochile ("n. sg. A") "sp. B" Hawle and Corda 1847 trilobite
 Phacopida - Cheiruridae
Cheirurus (Pilletopeltis) meridianus
 Harpetida - Harpetidae
Harpes sp.
Harpes sp. Goldfuss 1839 trilobite