Lower Hamar Laghdad Limestone, Hamar Laghdad (I,II,III,IV,V), SE Morocco: Pragian, Morocco

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Tentaculita - Nowakiida - Nowakiidae
Nowakia acuaria
Trilobita - Odontopleurida - Odontopleuridae
Isoprusia (Isoprusia) tafilaltana
Trilobita - Corynexochida - Styginidae
Paralejurus brongniarti
Bojoscutellum aff. paliferum
? Platyscutellum tafilaltense n. sp.
Alberti 1970
Kolihapeltis cf. perlonga
Kolihapeltis chlupaci
Kolihapeltis hamlaghdadica n. sp.
Alberti 1970
Breviscutellum cf. inerme
Alberti 1970
Trilobita - Proetida - Tropidocoryphidae
Denemarkia tafilaltensis
Tropidocoryphe sp. (Novak 1890)
Trilobita - Proetida - Proetidae
Proetus (Proetus) listei Kegel 1926
Unguliproetus tafilaltensis (Alberti 1964)
Proetus (Proetus) ovalis n. sp. Alberti 1969
Proetus (Proetus) africanus Alberti 1969
Proetus (Coniproetus) condensus (Pribyl 1965)
Cornuproetus (Cornuproetus) taciturnus (Kegel 1926)
    = Cornuproetus pernix Alberti 1969
Bault et al. 2021
Cornuproetus (Cornuproetus) chlupaci Alberti 1967
Cornuproetus (Cornuproetus) mauretanicus Alberti 1967
Cornuproetus (Lepidoproetus) praematurus Alberti 1964
Trilobita - Proetida - Tropidocoryphidae
Alberticoryphe stirps
Eremiproetus tafialtanus
Eremiproetus helmuti Alberti 1967
? Eremiproetus munitus n. sp. Alberti 1969
Eremiproetus erfoudanus n. sp. Alberti 1969
Eremiproetus meridianomaurus Alberti 1967
Trilobita - Proetida - Otarionidae
Otarion (Otarionella) magnificum Alberti 1967
Trilobita - Phacopida - Cheiruridae
Cheirurus (Crotalocephalina) gibbus (Beyrich 1845)
Trilobita - Phacopida - Calymenidae
Calymene (Gravicalymene) informal n. sp. A
Trilobita - Phacopida - Homalonotidae
? Trimerus informal sp. A
Alberti 1970
Trilobita - Phacopida - Phacopidae
Phacops (Reedops) bronni (Barrande 1846)
Alberti 1970
Phacops (Reedops) cephalotes Hawle and Corda 1847
Trilobita - Phacopida - Acastidae
Treveropyge informal sp. A
Asteropyginae indet. Delo 1935
Alberti 1970
Trilobita - Phacopida - Dalmanitidae
Odontochile rugosum (Hawle and Corda 1847)
Odontochile hausmanni (Brongniart 1822)
Trilobita - Lichida - Lichidae
? Acanthopyge sp. Hawle and Corda 1847
Trilobita - Harpetida - Harpetidae
Harpes informal sp. A
see common names

Geography
Country:Morocco
Coordinates: 31.4° North, 4.1° West (view map)
Paleocoordinates:59.4° South, 29.1° East
Basis of coordinate:based on nearby landmark
Geographic resolution:local area
Time
Period: Devonian Epoch: Early Devonian
Stage: Pragian 10 m.y. bin: Devonian 1
Key time interval: Pragian
Age range of interval: 410.8 - 407.6 m.y. ago
Stratigraphy
Formation:Hamar Laghdad Limestone
Stratigraphic resolution:formation
Stratigraphy comments: Lower Hamar Laghdad Lst.
Lithology and environment
Primary lithology:shelly/skeletal "limestone"
Secondary lithology: marl
Includes fossils?Y
Includes fossils?Y
Lithology description: See geology.
Environment:marine indet.
Geology comments: Biohermal and biostromal deposits. H.L. facies includes crinoidal limestone and organodetrital limestone of the reef periphery, volcaniclastics (tuff, tuffite). These facies are stratigraphically above a sequence that goes from graptolitic shales in the Budnanian, through volcaniclastics with some limestone lenses in the Lochkovian, to bituminous limestone nodules within shales in the lowest Pragian, to the crinoidal/reefal limestone facies of the lower H.L. Limestone (see fig. 54).
Taphonomy
Collection methods and comments
Collection excludes:some macrofossils
Reason for describing collection:taxonomic analysis
Taxonomic list comments:Focus is on trilobites, but some other elements are listed.
Metadata
Database number:27062
Authorizer:M. Foote, P. Wagner Enterer:M. Foote, P. Wagner
Modifier:M. Foote Research group:marine invertebrate
Created:2002-11-15 10:09:35 Last modified:2006-09-13 14:01:03
Access level:the public Released:2002-11-15 10:09:35
Creative Commons license:CC BY
Reference information

Primary reference:
7484. G. K. B. Alberti. 1969. Trilobiten des juengeren Siluriums sowie des Unter- und Mitteldevons. I. Mit Beitraegen zur Silur-Devon-Stratigraphie einiger Gebiete Marokkos und Oberfrankens. Abhandlungen der Senckenbergischen Naturforschenden Gesellschaft 520:1-692 [M. Foote/M. Foote/M. Foote]

Secondary references:

7485 G. K. B. Alberti. 1970. Trilobiten des juengeren Siluriums sowie des Unter- und Mitteldevons. II. Abhandlungen der Senckenbergischen Naturforschenden Gesellschaft 525:1-233 [M. Foote/M. Foote/M. Foote]
78608 V. Bault, C. Cronier, N. Allaire and C. Monnet. 2021. Trilobite biodiversity trends in the Devonian of North Africa. Palaeogeography, Palaeoclimatology, Palaeoecology 565:110208 [P. Wagner/P. Wagner]