Moravec František, Novacovsky Gabriela N, Hernández-Orts Jesús S
Institute of Parasitology, Biology Centre of the Czech Academy of Sciences, Branišovská 31, 370 05, České Budějovice, Czech Republic.
Centro para el Estudio de Sistemas Marinos (CESIMAR), CCT CENPAT, CONICET, Boulevard Brown 2915, U9120ACV, Puerto Madryn, Chubut, Argentina.
Syst Parasitol. 2018 Jun;95(5):403-414. doi: 10.1007/s11230-018-9793-1. Epub 2018 Apr 3.
Based on light and scanning electron microscopical studies, a new nematode parasite, Pseudodelphis eleginopsis n. sp. (Dracunculoidea: Guyanemidae), is described from tissues behind the gills of the Patagonian blennie Eleginops maclovinus (Cuvier) (Perciformes: Eleginopsidae) off the Atlantic coast (San Matías and San José Gulfs) of Patagonia, Argentina. The new species is mainly characterised by the length of the body (males 10-13 mm, larvigerous females 31-59 mm), the number (14) and arrangement of cephalic papillae, the absence of a buccal capsule, the muscular to glandular oesophagus length ratio (1:3-4) of larvigerous females, the length of the spicules (48-63 µm) and the number (7 pairs) and arrangement of the caudal papillae in the male. Pseudodelphis eleginopsis n. sp. is the first species of this genus described from a marine fish in the Atlantic Ocean and the first known dracunculoid parasitising the fish host belonging to the family Eleginopsidae. As revealed by the examination of very young females of the new species, the female genital tract of Pseudodelphis spp. is monodelphic. The genus Syngnathinema Moravec, Spangenberg & Frasca, 2001 is considered a junior synonym of Pseudodelphis Adamson & Roth, 1990 and, consequently, S. californiense and S. chitwoodi are transferred to Pseudodelphis as P. californiensis (Moravec, Spangenberg & Frasca, 2001) n. comb. and P. chitwoodi (Moravec & Kuchta, 2013) n. comb., respectively. Two dracunculoid species, Pseudodelphis limnicola Brugni & Viozzi, 2006 and the previously established Philonema percichthydis Moravec, Urawa & Coria, 1997, both described from the same freshwater host species, Percichthys trucha (Valenciennes), in the same region (Patagonia), are considered to be identical; therefore, the valid name of this species is Pseudodelphis percichthydis n. comb. and P. limnicola becomes its junior synonym. A key to the species of Pseudodelphis is provided.
基于光学显微镜和扫描电子显微镜研究，从阿根廷巴塔哥尼亚大西洋海岸（圣马蒂亚斯湾和圣何塞湾）的巴塔哥尼亚鳚Eleginops maclovinus（居维叶）（鲈形目：Eleginopsidae）鳃后的组织中描述了一种新的线虫寄生虫，优雅拟假德尔菲线虫Pseudodelphis eleginopsis n. sp.（龙线总科：圭亚那线虫科）。新物种的主要特征包括体长（雄性10 - 13毫米，含幼虫的雌性31 - 59毫米）、头部乳突的数量（14个）和排列方式、无口囊、含幼虫的雌性肌肉质食管与腺质食管长度比（1:3 - 4）、交合刺长度（48 - 63微米）以及雄性尾乳突的数量（7对）和排列方式。优雅拟假德尔菲线虫Pseudodelphis eleginopsis n. sp.是该属中第一个从大西洋海洋鱼类中描述的物种，也是第一个已知寄生于Eleginopsidae科鱼类宿主的龙线总科寄生虫。通过对新物种非常年轻的雌性个体的检查发现，拟假德尔菲属的雌性生殖道为单子宫型。2001年的Syngnathinema Moravec、Spangenberg & Frasca属被认为是1990年的Pseudodelphis Adamson & Roth属的次异名，因此，加利福尼亚合鳃线虫S. californiense和奇氏合鳃线虫S. chitwoodi分别作为加利福尼亚拟假德尔菲线虫P. californiensis（Moravec、Spangenberg & Frasca，2001）n. comb.和奇氏拟假德尔菲线虫P. chitwoodi（Moravec & Kuchta，2013）n. comb.转移到拟假德尔菲属。两种龙线总科物种，2006年描述的淡水拟假德尔菲线虫Pseudodelphis limnicola Brugni & Viozzi和1997年建立的鲈形嗜线虫Philonema percichthydis Moravec、Urawa & Coria，均从同一地区（巴塔哥尼亚）的同一淡水宿主物种——真鲈Percichthys trucha（瓦朗谢讷）中描述，被认为是同一物种；因此，该物种的有效名称是嗜线拟假德尔菲线虫Pseudodelphis percichthydis n. comb.，而淡水拟假德尔菲线虫P. limnicola成为其次异名。提供了拟假德尔菲属物种的检索表。
