کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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4468064 | 1622305 | 2009 | 6 صفحه PDF | دانلود رایگان |
The Neogene African fossil record of two fishes, i.e. Semlikiichthys (Perciformes indet.) and Calarius (Siluriformes, Ariidae) is reviewed including new material from Chadian outcrops. Their distribution confirms the existence of a Nilo-Sudan ichthyological province. During an early part of the Miocene an east–west waterway is demonstrated to have crossed Africa. Allopatric speciation in the Chadian and East African areas suggests that a split occurred in this system prior to 7 Ma. Moreover, our data support the existence of hydrographical connections between the Chadian basin and the Syrte basin, after 7 Ma, at about the Mio-Pliocene boundary. Finally, our study also demonstrates that connections between the Niger and Chad basins existed at the very end of the Miocene.
Journal: Palaeogeography, Palaeoclimatology, Palaeoecology - Volume 274, Issues 3–4, 15 April 2009, Pages 134–139