Sidi Ahroun Limestone, Sidi Ahroun, Hercynian Massif, Morocco: Pragian, Morocco

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Tentaculita - Nowakiida - Peneauiidae
Guerichina strangulata
Tentaculita - Nowakiida - Nowakiidae
Nowakia acuaria
Viriatellina aff. galinae
Trilobita - Phacopida - Cheiruridae
Cheirurus (Crotalocephalina) brevispinosus
original and current combination Crotalocephalina
Cheirurus (Crotalocephalina) cf. brevispinosus
original and current combination Crotalocephalina
Trilobita - Phacopida - Phacopidae
Phacops (Reedops) cf. sternbergi (Hawle and Corda 1847)
Alberti 1970
recombined as Reedops sternbergi
Phacops (Reedops) aff. modestus Barrande 1872
recombined as Nephranomma modestus
Trilobita - Corynexochida - Styginidae
? Scabriscutellum frix n. sp.
Alberti 1970
Breviscutellum inerme
Breviscutellum tiddasense n. sp.
Alberti 1970
Kolihapeltis chlupaci
Trilobita - Proetida - Proetidae
Proetus (Proetus) listei Kegel 1926
recombined as Kegeliella listei
Cornuproetus (Cornuproetus) taciturnus (Kegel 1926)
    = Cornuproetus pernix Alberti 1969
Bault et al. 2021
recombined as Montanproetus pernix
Cornuproetus (Cornuproetus) pernix Alberti 1969
recombined as Montanproetus pernix
Cornuproetus (Cornuproetus) steinbergicus Alberti 1967
recombined as Cornuproetus steinbergicus
Trilobita - Proetida - Tropidocoryphidae
Astycoryphe ? maroccanica Alberti 1967
recombined as Tropidocoryphe maroccanica
Denemarkia africana Alberti 1967
Eremiproetus papilio Erben 1952
Eremiproetus ferentarius (Alberti 1964)
Eremiproetus cacuminatus (Kegel 1926)
Eremiproetus berberus Alberti 1967
Alberticoryphe rugosa Alberti 1967
Trilobita - Proetida - Otarionidae
Otarion (? Otarionella) sidiarounium n. sp.
original and current combination Otarionella
Trilobita - Odontopleurida - Odontopleuridae
Isoprusia (Isoprusia) laportei
see common names

Geography
Country:Morocco
Coordinates: 33.4° North, 6.0° West (view map)
Paleocoordinates:57.2° South, 22.8° East
Basis of coordinate:based on nearby landmark
Geographic resolution:local area
Time
Period:Devonian Epoch:Early/Lower Devonian
Stage:Pragian 10 m.y. bin:Devonian 1
*International age/stage:Late/Upper Pragian
Key time interval:Pragian
Age range of interval:410.80000 - 407.60000 m.y. ago
* legacy (obsolete) database fields
Stratigraphy
Formation:Sidi Ahroun Limestone
Stratigraphic resolution:formation
Stratigraphy comments: Sidi Ahroun-Kalk. Younger Pragian.
Lithology and environment
Primary lithology:shelly/skeletal,gray "limestone"
Secondary lithology:"cross stratification" sandstone
Includes fossils?Y
Includes fossils?Y
Lithology description: "typical Hercynian limestone...reminiscent of upper Koneprusy Limestone...variously colored (white-gray...) organodetrital limestone and crinoidal limestone, mostly without bedding. Typical are intraformational limestone breccias, often over a meter thick....sandstone interbeds with typical crossbedding (with rhenish faunal elements"
Environment:marine indet.
Geology comments: Hercynian Massif of central Morocco. N limb of the Khourigba-Oulmes anticlinorium.
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:27061
Authorizer:M. Foote, P. Wagner Enterer:M. Foote, P. Wagner
Modifier:M. Foote Research group:marine invertebrate
Created:2002-11-15 09:43:59 Last modified:2006-09-13 14:01:03
Access level:the public Released:2002-11-15 09:43:59
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]