Hinsinger Damien D, Justine Jean-Lou
Equipe Biogéographie Marine Tropicale, Unité Systématique, Adaptation, Evolution (CNRS, UPMC, MNHN, IRD), Institut de Recherche pour le Développement, BP A5, 98848 Nouméa Cedex, Nouméa, Nouvelle Calédonie.
Syst Parasitol. 2006 Jun;64(2):69-90. doi: 10.1007/s11230-005-9018-2. Epub 2006 May 19.
Pseudorhabdosynochus cupatus (Young, 1969) is characterised by small lamellosquamodiscs made up of central telescopic rings and peripheral rows of rodlets, and a sclerotised vagina in the shape of a thin-walled coiled tube with three accessory chambers. Two new species of Pseudorhabdosynochus are herein described from epinepheline fish off New Caledonia, South Pacific, and are considered part of the 'P. cupatus group'. P. cyathus n. sp. from Epinephelus howlandi has lamellosquamodiscs made up of four telescopic rings and four rows of separate rodlets; there are dorsal tegumental scales. This species was found only in young hosts; older hosts harbour P. venus Hinsinger & Justine, 2006. P. calathus n. sp. from Epinephelus rivulatus has lamellosquamodiscs made up of four telescopic rings and five rows of separate rodlets; the tegument is smooth. The three species, P. cupatus, P. calathus and P. cyathus, are strictly species specific; although morphologically very similar, they can be distinguished by features of the tegumental scales and measurements of the vagina and haptoral hard parts. P. melanesiensis (Laird, 1958) from E. merra is close to the 'P. cupatus group' according to the morphology of its sclerotised vagina but is distinguished by its squamodiscs which lack telescopic rings. Rare specimens found in E. merra are tentatively attributed to P. coioidesis Bu et al., 1999. A paratype of P. coioidesis is figured for comparison. E. merra, E. fasciatus, E. rivulatus and E. howlandi each have a Pseudorhabdosynochus species of the P. cupatus lineage: these are the dominant species in each host. In addition, E. merra, E. fasciatus and E. howlandi harbour a rare species of Pseudorhabdosynochus, respectively P. cf. coioidesis, P. caledonicus Justine, 2005 and P. venus; these rare species are morphologically unrelated to each other and to the 'P. cupatus group'.
杯形拟铗钩虫（Young，1969）的特征为：由中央伸缩环和外周小杆排构成的小薄片鳞盘，以及呈薄壁盘管状且具三个附属腔室的硬化阴道。本文描述了来自南太平洋新喀里多尼亚附近石斑鱼的两种新拟铗钩虫物种，它们被视为“杯形拟铗钩虫类群”的一部分。豪氏石斑鱼体内的杯状拟铗钩虫新种，其薄片鳞盘由四个伸缩环和四排独立小杆构成；体表有背鳞。该物种仅在幼体宿主中发现；成体宿主中寄生的是金星拟铗钩虫（Hinsinger & Justine，2006）。细纹石斑鱼体内的杯形拟铗钩虫新种，其薄片鳞盘由四个伸缩环和五排独立小杆构成；体表光滑。杯形拟铗钩虫、杯形拟铗钩虫新种和杯状拟铗钩虫这三个物种严格具有宿主特异性；尽管形态上非常相似，但可通过体表鳞片特征以及阴道和抱器硬体部分的测量来区分。根据其硬化阴道的形态，梅氏石斑鱼体内的美拉尼西亚拟铗钩虫（Laird，1958）接近“杯形拟铗钩虫类群”，但其区别在于缺少伸缩环的鳞盘。在梅氏石斑鱼中发现的罕见标本暂归为布氏拟铗钩虫（Bu等，1999）。给出了布氏拟铗钩虫的一个副模标本用于比较。梅氏石斑鱼、横纹石斑鱼、细纹石斑鱼和豪氏石斑鱼各自都有一种杯形拟铗钩虫类群的拟铗钩虫物种：这些是每个宿主中的优势物种。此外，梅氏石斑鱼、横纹石斑鱼和豪氏石斑鱼还分别寄生有一种罕见的拟铗钩虫物种，即布氏拟铗钩虫近似种、喀里多尼亚拟铗钩虫（Justine，2005）和金星拟铗钩虫；这些罕见物种在形态上彼此无关，也与“杯形拟铗钩虫类群”无关。
