Middle Pragian Marl (Unit 5a) at Ben Zireg, Bechar Basin, SW Algeria (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)

• PJW: Saheb el Djir is the Pragian aged formation in the Bechar Basin.

• group of beds-level stratigraphic resolution

Environment/lithology: offshore; marl and limestone

• SEP environmental call based on given info and regional context
• "Nodular marl layers with isolated limestone beds"

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 27162: authorized by Michael Foote, entered by Michael Foote on 20.11.2002, edited by Pete Wagner

Creative Commons license: CC BY (attribution)

Taxonomic list

• Emphasis is on trilobites and stratigraphically useful nowakiids.
Tentaculita
 Nowakiida - Nowakiidae
Trilobita
 Phacopida - Phacopidae
Phacops (Prokops) chlupaci n. sp. Alberti 1983 trilobite
Phacops (Boeckops) algericus n. sp. Alberti 1983 trilobite
Reedops sp. n. sp. Richter and Richter 1925 trilobite
Reedops struveianus n. sp. Alberti 1983 trilobite
"Reedops hamlagdadianus" = Reedops cephalotes hamlagdadianus Alberti 1983 trilobite
 Phacopida - Dalmanitidae
"Odontochile aff. hausmanni" = Odontochile hausmani
"Odontochile aff. hausmanni" = Odontochile hausmani Brongniart 1822 trilobite
 Phacopida - Cheiruridae
"Cheirurus (Crotalocephalina) gibbus" = Crotalocephalina gibbus, "Cheirurus (Pilletopeltis) pauper" = Crotalocephalus pauper
"Cheirurus (Crotalocephalina) gibbus" = Crotalocephalina gibbus Beyrich 1845 trilobite
"Cheirurus (Pilletopeltis) pauper" = Crotalocephalus pauper Barrande 1852 trilobite
 Proetida - Proetidae
Prodrevermannia jaegeri Alberti 1964 trilobite