Boxshall Geoffrey A, Justine Jean-Lou
Department of Zoology, The Natural History Museum, Cromwell Road, London SW7 5BD, UK.
Folia Parasitol (Praha). 2005 Nov;52(4):349-58. doi: 10.14411/fp.2005.048.
A new genus and species, Avitocaligus assurgericola gen. et sp. n., of the family Caligidae is established based on an ovigerous female collected from a razorback scabbardfish, Assurger anzac (Alexander), caught off New Caledonia. This is the first record of any parasitic copepod from this fish. The new genus is placed in the Caligidae since it possesses the caligid cephalothorax incorporating the first to third pedigerous somites. It also exhibits biramous first and fourth swimming legs but lacks dorsal plates on the fourth pedigerous somite. This combination of characters serves to differentiate the new genus from existing genera. In addition, it possesses loosely coiled, uniseriate egg sacs, concealed between the middle lamellar plates on the genital complex and the ventral plates on the abdomen. Preliminary phylogenetic analysis with a restricted matrix suggests that the new genus represents the earliest offshoot from the main caligid lineage since it does not exhibit the dominant exopod on the fourth swimming leg found in all other members of the Caligidae, including the genus Euryphorus. It strongly supports the newly recognized monophyletic status of the Caligidae, incorporating the genera formerly placed in the Euryphoridae.
基于从新喀里多尼亚外海捕获的一条新西兰拟蛇鲭（Assurger anzac (Alexander)）上采集到的抱卵雌体，建立了锚头鱼虱科（Caligidae）的一个新属新种——起浪锚头鱼虱属及种（Avitocaligus assurgericola gen. et sp. n.）。这是该鱼类寄生桡足类的首次记录。新属被置于锚头鱼虱科，因为它具有包含第一至第三胸节的锚头鱼虱型头胸部。它还具有双分支的第一和第四游泳足，但第四胸节上没有背板。这些特征组合有助于将新属与现有属区分开来。此外，它具有松散盘绕的单列卵囊，隐藏在生殖复合体的中间板层和腹部腹板之间。使用受限矩阵进行的初步系统发育分析表明，新属代表了锚头鱼虱科主要谱系的最早分支，因为它在第四游泳足上没有其他所有锚头鱼虱科成员（包括宽额鱼虱属（Euryphorus））都具有的优势外肢。这有力地支持了新确认的锚头鱼虱科的单系地位，该科包含以前置于宽额鱼虱科的属。
