Where: Meknès-Tafilalet, Morocco (31.6° N, 5.7° W: paleocoordinates 24.8° N, 7.5° W)
• coordinate based on nearby landmark
• small collection-level geographic resolution
When: Jbel Guersif Formation (Subatlas Group), Thanetian (59.2 - 56.0 Ma)
• "Shark teeth indicate that the age is Thanetian" (Gingerich, 1990).
•Lithostratigraphy is from Augé & Rage (2006) and Dragastan & Herbig (2007, Micropaleontology 53(1-2), 1-72). (TL)
•" [...] a magnetostratigraphic study has suggested an Upper or Uppermost Thanetian age for Adrar Mgorn 1 (Gheerbrant et al., 1998)" (Augé & Rage, 2006).
• group of beds-level stratigraphic resolution
Environment/lithology: peritidal; dolomitic, shelly/skeletal limestone
•"Both the Jbel Guersif and Ait Ouarhitane Formations were deposited in shallow marine environment, but terrestrial vertebrates (mammals and lepidosaurians) are numerous in the faunas. The floras indicate that deposition of the vertebrate remains took place in proximity of a mangrove under tropical conditions, whereas the hinterland was covered by a tropical forest" (Augé & Rage, 2006).
•"For the late Thanetian Jbel Guersif Formation, Kuss and Herbig (1993, figs. 5, 6) deduced a tidal flat and restricted lagoon in the easternmost 30 kilometers of the outcrop area around Tinerhir [...]" (Dragastan & Herbig, 2007), which geographically exactly applies for Adrar Mgorn.
•According to the latter two quotes, the original environment entry >>marginal marine indet.<< was altered (TL).
•The Ouarzazate Basin is a foreland Basin according to Tawadros (2012).
•According to Tawadros (2012, Geology of North Africa, Taylor & Francis) and Dragastan & Herbig (2007, Micropaleontology 53(1-2), 1-72), the Jbel Guersif Formation consists of at least one shallowing-upward sequence of shallow marine, white to pale rose bioclastic limestones. Augé & Rage (2006) speak of "dolomitic limestones". Thus the original lithology entry >>calcareous "siliciclastic"<< was altered (TL).
Size class: macrofossils
Collected in 1977; reposited in the MNHN
Collection methods: acetic
• specimens are "fragile and extracted with difficulty in acid" (Gingerich, 1990)
•USTL = Laboratoire de Paléontologie, Université des Sciences et Techniques du Languedoc, Montpellier, France
Primary reference: P. D. Gingerich. 1990. African dawn for primates. Nature 346:411 [J. Alroy/J. Alroy]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 88301: authorized by John Alroy, entered by John Alroy on 06.04.2009, edited by Philip Mannion and Torsten Liebrecht
Creative Commons license: CC BY (attribution)
Taxonomic list
Mammalia | |
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Eutheria " sp. 2 "7, Eutheria " sp. 3 "7, Eutheria " sp. 4 "7, Eutheria " sp. 5 "7, Eutheria " sp. 1 "7
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Garatherium todrae n. sp.7 Gheerbrant et al. 1998 eutherian THR-MFSP 35 - type (left M3); THR-MFSP 34 (left M1/2) and THR 273 (left M1/2); tentatively assigned material: THR-MFSP 35 (left M3)
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Proteutheria "sp. 1"6 Romer 1966 eutherian THR 155 (left m1 or 2); "Proteutheria or Lipotyphla indet. 1"
Proteutheria "sp. 3"6 Romer 1966 eutherian THR 282 (left m1 or 2); "Proteutheria or Lipotyphla indet. 3"
? Proteutheria "sp. 4"6 Romer 1966 eutherian THR 195 (right m1 or 2); "? Proteutheria or ? Lipotyphla indet. 4"
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Didelphodontinae "sp. 1"4, Didelphodontinae "sp. 2"4, Didelphodontinae "sp. 3"4, Palaeoryctes minimus n. sp.4, cf. Palaeoryctes minimus4
Palaeoryctes minimus n. sp.4 Gheerbrant 1992 eutherian THR 159 - type (left m1 or 2); additional referred remains
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Aboletylestes robustus n. sp.4, ? Aboletylestes hypselus4, Cimolestes cf. incisus4, Cimolestes cuspulus n. sp.4
Aboletylestes robustus n. sp.4 Gheerbrant 1992 eutherian THR 184 - type (right m1); referred material: THR 126 (right m2)
Cimolestes cf. incisus4 Marsh 1889 eutherian THR 148 (right m2); previously mentioned as "cf. Cimolestes sp." by Caappetta et al. (1987)
Cimolestes cuspulus n. sp.4 Gheerbrant 1992 eutherian THR 130 - type (right m1 or 2); additional referred remains
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Todralestes variabilis n. gen. n. sp.3 Gheerbrant 1991 eutherian THR 134 - holotype (partial right maxilla); hypodigm: THR 90 (dentary fragment); approximately 150 referred specimens
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"? Ungulata indet." = Euungulata6
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"Tinerhodon disputatum n. gen. n. sp." = Tinerhodon disputatus6, "cf. Tinerhodon disputatum" = Tinerhodon disputatus6
"Tinerhodon disputatum n. gen. n. sp." = Tinerhodon disputatus6 Gheerbrant 1995 creodont THR 192 - holotype (left m3); additional referred remains
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Altiatlasius koulchii n. gen. n. sp. Sigé et al. 1990 primate | |
Reptilia | |
Scincomorpha indet.1, Lacertilia indet.1, Lacertilia "indet. A"1, Lacertilia "indet. B"1, Lacertilia "indet. C"1, Coniophis sp.1, Scolecophidia indet.1
Scincomorpha indet.1 Camp 1923 squamates anterior part of a left dentary (USTL THR 406) and one trunk vertebra (MNHN THR MFSP 53)
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Gekkonidae indet.1 Gray 1825 gecko frontal bone (USTL THR 401), incomplete maxilla (USTLTHR 402), 3 incomplete dentaries (USTLTHR 403 and 404; MNHN THR MFSP 52), and one fragment of dentigerous bone (USTL THR 405)
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Amphisbaenia indet.1 worm lizard 2 partial dentaries (USTL THR 408; MNHN THR MFSP 54), 1 vertebra (MNHN, THRbis 10)
Todrasaurus gheerbranti n. gen. n. sp.1 Augé and Rage 2006 worm lizard Holotype: nearly complete left dentary with part of splenial (USTL THR 407).
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Amphibia | |
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