Ounein A bioherm, Lemdad 1 section, High Atlas (Cambrian of Morocco)

Also known as Reef 2170

Where: Morocco (30.8° N, 8.2° W: paleocoordinates 64.0° S, 112.7° E)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Lemdad Formation, Botomian (516.0 - 512.9 Ma)

• Antatlasia guttapluviae zone, upper part of the formation

• group of beds-level stratigraphic resolution

Environment/lithology: reef, buildup or bioherm; lithified reef rocks and lithified floatstone

• Archaeocyathan-microbial reef complex, with archaeocyathan-microbial patches in the lower part (0.2-1 m thick and 0.2-2 m wide) and tabular archaeocyathan-microbial reef (up to 2.6 m thick) in the upper part, surrounded by volcanosedimentary units

Size class: macrofossils

Collection methods: peel or thin section,

Primary reference: G. Geyer, E. Landing, and W. Heldmaier. 1995. Faunas and depositional environments of the Cambrian of the Moroccan Atlas regions. Beringeria, Special Issue 2:47-119 [W. Kiessling/U. Merkel]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 80850: authorized by Wolfgang Kiessling, entered by Uta Merkel on 16.05.2008

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Hormogoneae
 Oscillatoriales - Girvanellaceae
Girvanella sp.
Girvanella sp. Nicholson and Etheridge 1878
Renalcis
  - Chabakoviacea
Renalcis sp.
Renalcis sp. Vologdin 1932
Epiphyton
  - Ludloviaceae
Epiphyton sp.
Epiphyton sp. Bornemann 1886
 Hyolithelminthida - Hyolithellidae
Hyolithellus cf. micans
Helcionelloida
 Helcionellida - Helcionellidae
Anabarella sp.
Anabarella sp. Vostokova 1962
Obolellata
 Obolellida -
Obolellida indet.
Obolellida indet. Rowell 1965
Trilobita
  -
Trilobita indet.
Trilobita indet. Walch 1771 trilobite
 Redlichiida - Ellipsocephalidae
"Berabichia vertumnia" = Ptychoparopsis
"Berabichia vertumnia" = Ptychoparopsis trilobite
 Redlichiida - Redlichiidae
? Lemdadella sp.
? Lemdadella sp. Sdzuy 1978 trilobite
Coeloscleritophora
 Chancelloriida -
Chancelloriida indet.
Chancelloriida indet. Walcott 1920
Archaeocyatha
 Ajacicyathida - Ethmocyathidae
Afiacyathus ouneinensis
Afiacyathus ouneinensis archaeocyath sponge
 Ajacicyathida - Salairocyathidae
Polystillicidocyathus erbosimilis
 Ajacicyathida - Agyrekocyathidae
"Mennericyathus asper" = Agyrekocyathus
"Mennericyathus asper" = Agyrekocyathus archaeocyath sponge
 Archaeocyathida - Loculicyathidae
Paranacyathus patulus
Paranacyathus patulus archaeocyath sponge
 Archaeocyathida - Dictyocyathidae
Chouberticyathus clatratus
Chouberticyathus clatratus archaeocyath sponge
 Archaeocyathida - Archaeopharetridae
Archaeopharetra sp., Protopharetra aff. polymorpha
Archaeopharetra sp. archaeocyath sponge
Protopharetra aff. polymorpha archaeocyath sponge