The microvertebrates (Micrommamals, Amphibians, Reptiles, Aves and Fishes) from the archeopaleontological site of Wadi Sarrat (NW Tunisia) Bio-geo-chronology, Paleobiogeography and Paleoenvironmental reconstruction.

Identificador:  TDX:3291

Handle: https://hdl.handle.net/20.500.11797/TDX3291

Autors:  Mtimet, Moncef Said

Resum:
The study of the microvertebrates from Oued Sarrat site, located in the north-west of Tunisia, allowed us to identify 24 species composed by 9 rodents (Mus aff. spretus, M. cf. hamidae, Paraethomys rbiae, Praomys sp., Meriones sp., Dipodillus (Gerbillus) compestris, Eliomys sp., Arvicanthis sp. and Dendromus sp.), 3 species of anurans (Discoglossus pictus, Bufo mauritanicus and Pelophylax saharicus), 1 chelonian (Emys sp./Mauremys sp.), 8 squamates [2 lezards (Eumeces sp., Lacertidae indet. Small size), 2 morphotypes of colubrids (Macroprotodon sp. and Hemorrhois sp.), 1 species of Colubridae s.l. (Coronella sp./Telescopus sp.), 2 Natricidae (Natrix natrix and N. maura), 1 viperidae (Macrovipera / Daboia sp.)], 1 species of Erycinea (Boidae), 1 species of freshwater fish of the Cyprinidae family and 1 small bird belonging to the Passeriformes family. The biochronology of the Oued Sarrat series was carried out from the vertical distribution of species of microvertebrates as well as the association of all the collected fauna. The species index Paraethomys rbiae has an occurrence not exceeding the Lower Pleistocene-Middle Pleistocene limit in all North African sites indicates that the site is dated to the beginning of the Middle Pleistocene, about 700 ky, corresponding to the base of the normal chron Brunhes. A paleomagnetic study carried out on samples from the site revealed that the polarity is normal.