Llanvirn section, Tachilla Fm., Anti-Atlas Mountains, Morocco (Ordovician of Morocco)

Where: Morocco (30.0° N, 8.5° W: paleocoordinates 82.5° S, 88.5° E)

When: Tachilla Formation, Oretanian (468.0 - 459.0 Ma)

• formation-level stratigraphic resolution

Environment/lithology: offshore; lithified, micaceous, sandy shale

• Sandy, micaceous, light shale

Size classes: macrofossils, mesofossils

Primary reference: C. Babin and J. Destombes. 1990. Les mollusques bivalves et rostroconches Ordoviciens de l’Anti-Atlas marocain: Intérêt paléogéographique de leur inventaire. Géologie Méditerranéenne 17:243-261 [A. Miller/P. Novack-Gottshall/P. Novack-Gottshall]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 20986: authorized by Arnold Miller, entered by Phil Novack-Gottshall on 13.06.2002

Creative Commons license: CC BY (attribution)

Taxonomic list

• Primarily bivalve and rostroconch taxonomy and biostrat., with others listed
Show authors, comments, and common names
Pterobranchia
 Graptoloidea - Climacograptidae
Pseudoclimacograptus sp.
 Graptoloidea - Dichograptidae
Didymograptus sp.
Didymograptus sp. McCoy 1851 graptolite
 Sphaeronitida - Sphaeronitidae
Calix sp.
Calix sp. Rouault 1851
Trilobita
 Corynexochida - Illaenidae
Ectillaenus sp.
Ectillaenus sp. Salter 1867 trilobite
 Odontopleurida - Odontopleuridae
Selenopeltis sp.
Selenopeltis sp. Hawle and Corda 1847 trilobite
 Phacopida - Dalmanitidae
Zeliszkella sp.
Zeliszkella sp. Delo 1935 trilobite
 Phacopida - Calymenidae
Neseuretus sp.
Neseuretus sp. Hicks 1873 trilobite
 Phacopida - Homalonotidae
Eohomalonotus sp., Colpocoryphe sp.
Eohomalonotus sp. Reed 1918 trilobite
Colpocoryphe sp. Novak and Perner 1918 trilobite
 Phacopida - Bathycheilidae
Bathycheilus sp.
Bathycheilus sp. Holub 1908 trilobite
 Asaphida - Asaphidae
Ogygiocaris sp.
Ogygiocaris sp. Angelin 1854 trilobite