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28.11.2008, 16:32 | #1 |
Welsfan
Registriert seit: 20.12.2004
Ort: 99427 Weimar
Beiträge: 3.673
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Two new species of Loricariidae (Teleostei: Siluriformes) from main channels of the upper and middle Amazon Basin, with discussion of deep water ...
Two new species of Loricariidae (Teleostei: Siluriformes) from main channels of the upper and middle Amazon Basin, with discussion of deep water specialization in loricariids Nathan K. Lujan and Carine C. Chamon Hemiancistrus pankimpuju , new species, and Panaque bathyphilus, new species, are described from the main channel of the upper (Marañon) and middle (Solimões) Amazon River, respectively. Both species are diagnosed by having a nearly white body, long filamentous extensions of both simple caudal-fin rays, small eyes, absence of an iris operculum and unique combinations of morphometrics. The coloration and morphology of these species, unique within Loricariidae, are hypothesized to be apomorphies associated with life in the dark, turbid depths of the Amazon mainstem. Extreme elongation of the caudal filaments in these and a variety of other main channel catfishes is hypothesized to have a mechanosensory function associated with predator detection. Quelle: Ichthyol. Explor. Freshwaters, Vol. 19, No. 3, pp. 271-282, Verlag Dr. Friedrich Pfeil, München, Germany – ISSN 0936-9902 Nur gegen Bezahlung: PDF Oder hier eine kurze Info: https://www.aquanet.de/magazin/magaz...4112600368.asp Viele Grüße Elko |
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