2009年10月9日 星期五

根據形態特徵重建的小波魚親緣關係顯示有四個新屬應被建立: Kottelatia (金腹燈), Brevibora (青眼燈), Rasbosoma, 與Trigonopoma (一線長虹燈)

文獻來源: Liao TY (廖德裕), Kullander SO, Fang F. 2009. Phylogenetic analysis of the genus Rasbora (Teleostei: Cyprinidae). Zoologica Scripta 39(2): 155-176 [link]

Abstract
A phylogenetic analysis was conducted based on 35 cyprinid taxa, including 29 species of Rasbora, and 41 morphological characters. A strict consensus tree from four equally parsimonious trees recovered rasborins as a monophyletic group characterized by (i) presence of dark supra-anal pigment and subpeduncular streak, (ii) 5–6 branched anal-fin rays, (iii) dorsal-fin insertion 1–3 scales behind pelvic-fin insertion, (iv) lateral process of second vertebra more or less straight, (v) 1–5 more abdominal than caudal vertebrae, (vi) absence of foramen in anterior wall of horizontal limb of the cleithrum, (vii) presence of rasborin process on epibranchial 4, and (viii) interhyal well ossified. Rasbora sensu stricto can be distinguished from all other rasborin genera by the presence of an opercular canal. Four new genera, viz. Brevibora, n. gen., Kottelatia, n, gen., Rasbosoma, n. gen. and Trigonopoma, n. gen., are recognized and described.

圖片連結: hexazona.com, www.otsuka-nettaigyo.com, aquatab.net (photo credit: Jiří Plíštil)