PBDB Collection

Hamar Laghdad, "Red Cliff" Latest Emsian to earliest brachipods (Devonian to of Morocco)

Where: Morocco (31.4° N, 4.1° W: paleocoordinates 49.8° S, 23.3° E)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Late/Upper Emsian to Late/Upper Emsian (402.5 - 387.7 Ma)

• Latest Emsian to earliest Eifelian

Environment/lithology: lagoonal or restricted shallow subtidal; lithified limestone and lithified marl

• calm and likely deeper but still photic environment, which was protected against destructive current and wave activity by surrounding mud mounds and the mud ridge to the west and south. In addition, the environment should not be too calm because of presence of rhynchonellids and retziids, which prefer a higher water energy. Furthermore, based on lithological information, the environment was suggested as a very shallow and and calm environment with local lagoonal bahamites and higher salinity between small coral biohermes. In summary, the environment represent a good model of equilibrium half-way between the current and wave agitated reefs and the muddy substrate of deeper basinal environment.

• red marlstones and calcareous mudstones

Size class: macrofossils

Primary reference: M. Mergl. 2018. The late Emsian association of weakly plicate brachiopods from Hamar Laghdad (Tafilalt, Morocco) and their ecology. 290(1-3):153-182 [W. Kiessling/A. EL Manharawy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 207889: authorized by Wolfgang Kiessling, entered by Ahmed EL Manharawy on 24.02.2020

Creative Commons license: CC BY (attribution)

Taxonomic list

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unclassified
-	Rhynchatrypa thetis Rhynchatrypa thetis articulated shells
Strophomenata
Strophomenida - Sowerbyellidae	Plectodonta (Dalejodiscus) sp. Plectodonta (Dalejodiscus) sp. shell
Strophomenida -	Novellinetes cf. novellus Novellinetes cf. novellus articulated shell
Rhynchonellata
Spiriferida - Reticulariidae	Eoreticularia indifferens Eoreticularia indifferens some deformed
Spiriferida - Adolfiidae	Amoenospirifer foedus, Pinguispirifer kesskess Amoenospirifer foedus shells Pinguispirifer kesskess 49 shells and one incomplete ventral valve
Spiriferida - Tenellodermidae	Cingulodermis pustulatus Cingulodermis pustulatus shells
Spiriferida - Ambocoeliidae	Echinocoelia sp. Echinocoelia sp. articulated shells
Spiriferinida - Cyrtinidae	Cyrtina sp. Cyrtina sp. Davidson 1858 shell
Athyridida - Meristidae	Merista passer Merista passer shells
Orthida - Rhipidomellidae	Dalejina aulacelliformis Dalejina aulacelliformis 30 articulated shells, 15 dorsal valves and one ventral valve
Orthida - Dalmanellidae	Zlichopyramis sp. Zlichopyramis sp. ventral valve
Atrypida - Davidsoniidae	"Quasidavidsonia tenuissima" = Prodavidsonia "Quasidavidsonia tenuissima" = Prodavidsonia shells
Atrypida - Carinatinidae	"Kaplicona sp." = Carinatina "Kaplicona sp." = Carinatina four articulated shells and two ventral valves
Atrypida - Glassiidae	Trigonatrypa drotae Trigonatrypa drotae 113 articulated shells and one ventral valve
Atrypida - Lissatrypidae	Radimatrypa sp., Holynatrypa sp. Radimatrypa sp. articulated shells Holynatrypa sp. articulated shells
Rhynchonellida - Aseptorhynchiidae	Carolirhynchia sp. Carolirhynchia sp. shells
Rhynchonellida - Glossinotoechiidae	Glossinulus mimicus Glossinulus mimicus shells
Pentamerida - Clorindidae	Clorinda cf. exarmata Clorinda cf. exarmata shells
Pentamerida - Gypidulidae	Lysigypa sp., Leviconchidiella sp. Lysigypa sp. Havlicek and Kukal 1990 13 articulated shells and two ventral valves Leviconchidiella sp. poorly preserved shell
Lingulata
Discinida - Disciniidae	Lochkothele sp. Lochkothele sp. Havlicek and Mergl 1988 incomplete valves.
Lingulida - Discinidae	Schizotreta sp. Schizotreta sp. Kutorga 1848 shell