2009年2月16日 星期一

非洲剛果民主共和果Mpozo河產非洲脂鯉一新種

文獻來源: Stiassny, M.L.J., Schelly, R.C. & Mamonekene, V. (2009): A New Alestes (Characiformes, Alestidae) from the Mpozo River in the Democratic Republic of Congo. Copeia, 2009 (1): 110-116. [全文連結]

Abstract
A new species of Alestes from the Mpozo River in the Bas Congo Province of the Democratic Republic of Congo is described and diagnostic characters for the genus are presented. Alestes inferus, new species, is differentiated from all other members of the genus by its lower and non-overlapping lateral-line scale count (31–33 versus 36–51) and its reduced and non-overlapping vertebral count (39–40 versus 41–49). Within Alestes, the new species appears to be most closely related to A. macrophthalmus and A. liebrechtsii, based on the shared possession by these three species of a tubular, bony extension enclosing the olfactory nerve on the lateral ethmoid, and bifurcated lateral-line canals terminating in two pores. Alestes liebrechtsii and A. inferus are the only species of the genus known from the lower Congo River.