七巧薄荷燈有學名囉, 是Serrapinnus sterbai

文獻來源: Zarske, A. (2012): Serrapinnus sterbai spec. nov. – Beschreibung eines neuen Salmlers (Teleostei: Characiformes: Characidae: Cheirodontinae) aus Brasilien mit Bemerkungen zu S. gracilis (Géry, 1960) comb. nov. und S. littoris (Géry, 1960) comb. nov. Vertebrate Zoology, 62 (1): 3–17. [全文連結]

Abstract

Serrapinnus sterbai spec. nov. from the eastern parts of Brazil (probably Araguaya drainage) is described. Typically there are (1) a black longitudinal band from the eye to the basis of caudal-fin, (2) an incomplete lateral line with eight to 12 pored scales, (3) 32 to 34 scales in a longitudinal line, (4) 21 to 23 anal-fin rays (total), (5) 32 to 33 vertebrae (4 + 9 – 10 + 18 – 20), (6) 14 to 16 gill-rakers on the first left arch (5 – 6 / 9 – 10), (7) five seven- to ninecuspid premaxillary teeth, (8) two to three sevencuspid maxillary teeth, (9) five sevencuspid mandibulary teeth, (10) head relatively small (3,93 to 4,71 times in SL) and (11) body depth moderately high (2,63 to 3,18 times in SL). The species is easy to identify from all other members of the genus by its coloration. Cheirodon gracilis Géry, 1960 and Cheirodon littoris Géry, 1960 are transferred into the genus Serrapinnus.

說明一下這是怎麼回事, 七巧薄荷燈輸入台灣是兩年前的事(喔真是光陰似箭), 當時怎麼查都查不到像的魚, 看起來在身形上最像Hyphessobrycon之類的魚, 但問題是Hyphessobrycon絕對沒有特化的臀鰭與尾柄下方的齒狀鱗片. Zarske終於把此魚發表了, 擺在Serrapinnus屬中. 但是這很複雜耶. 如果你對雜燈有興趣, 就知道所謂的月光鼠燈/月光燈樣的魚, 可能是Serrapinnus, Cheirodon或Odontostilbe. 這些魚都非常像, 而且與月光鼠(或其它脂鯉)都有社會性擬態的關係. 根據Zarske的意見, Serrapinnus與其它屬的差別就是在於尾柄下具有齒狀突起的鱗片(當然還有其它特徵). 然而曾在台灣市面上流通的各種類似的魚該如何鑑定似乎是很困難的. 雖然我們曾經討論過幾次, 但這些魚都不是穩定輸入, 來源也不盡相同, 以同樣的學名輸出的魚不一定相同, 而通用的中名也不穩定. 所以就先暫時不整理.