Leduc Daniel
Zootaxa. 2013;3682:351-70. doi: 10.11646/zootaxa.3682.2.8.
Three new free-living nematode species belonging to the genus Mudwigglus gen. n. are described from the continental slope of New Zealand. The new genus is characterised by four short cephalic setae, fovea amphidialis in the shape of an elongated loop, narrow mouth opening, small, lightly cuticularised buccal cavity, pharynx with oval-shaped basal bulb, and secretory-excretory pore (if present) at level of pharyngeal bulb or slightly anterior. Mudwigglus gen. et sp. n. differs from other genera of the family Diplopeltidae in the combination of the following traits: presence of reflexed ovaries, male reproductive system with both testes directed anteriorly and reflexed posterior testis, and presence of tubular pre-cloacal supplements and pre-cloacal seta. Mudwigglus patumuka gen. et sp. n. is characterised by gubernaculum with dorso-caudal apophyses, vagina directed posteriorly, and short conical tail with three terminal setae. M. macramphidum gen. et sp. n. is characterised by long fovea amphidialis, cylindrical buccal cavity, gubernaculum without apophyses, vagina at right angle to body surface, and conico-cylindrical tail without terminal setae. M. plebeius gen. et sp. n. is characterised by cylindrical buccal cavity with cuticularised ring, gubernaculum with dorso-caudal apophyses, females with vagina directed posteriorly, and conico-cylindrical tail with two terminal setae. Diplopeluta nellyae Vinex and Gourbault, 1992 is transferred to Mudwigglus gen. n. based on observations of paratypes from New Caledonia, and of specimens from the New Zealand continental slope, which both show the presence of two testes facing anteriorly. M. macramphidum gen. et sp. n. was restricted to a single site on Chatham Rise crest (350 m water depth), whereas M. patumuka gen. et sp. was recorded from six sites on western Chatham Rise (350-2800 m). M. plebeius gen. et sp. n. was recorded from 13 sites on Chatham Rise and two sites on Challenger Plateau (264-2300 m). Mudwigglus nellyae comb. n. was restricted to two Challenger Plateau sites. All Mudwigglus gen. n. species appear to be restricted to subsurface sediments.
从新西兰大陆坡发现了属于新属Mudwigglus gen. n. 的三种新的自由生活线虫物种。新属的特征是有四根短的头部刚毛、呈细长环状的双凹形、狭窄的口孔、小的、轻度角质化的口腔、具有椭圆形基部球状体的咽，以及分泌排泄孔（如果存在）位于咽球水平或稍前方。Mudwigglus gen. et sp. n. 与双带线虫科的其他属在以下特征组合上有所不同：存在反折的卵巢、雄性生殖系统中两个睾丸都朝前且后睾丸反折，以及存在管状的泄殖腔前补充结构和泄殖腔前刚毛。Mudwigglus patumuka gen. et sp. n. 的特征是有带背尾突的引带、阴道向后、短锥形尾带有三根末端刚毛。M. macramphidum gen. et sp. n. 的特征是双凹形长、圆柱形口腔、无突引带、与体表成直角的阴道，以及无末端刚毛的圆锥形尾。M. plebeius gen. et sp. n. 的特征是有角质化环的圆柱形口腔、有背尾突的引带、雌性阴道向后，以及有两根末端刚毛的圆锥形尾。基于对来自新喀里多尼亚的副模式标本以及来自新西兰大陆坡的标本的观察，1992年的双带线虫属的Diplopeluta nellyae Vinex和Gourbault被转移到Mudwigglus gen. n. 属，这两个标本都显示有两个朝前的睾丸。M. macramphidum gen. et sp. n. 局限于查塔姆隆起顶部的一个地点（水深350米），而M. patumuka gen. et sp. 记录于查塔姆隆起西部的六个地点（350 - 2800米）。M. plebeius gen. et sp. n. 记录于查塔姆隆起的13个地点和挑战者高原的两个地点（264 - 2300米）。Mudwigglus nellyae comb. n. 局限于挑战者高原的两个地点。所有Mudwigglus gen. n.属的物种似乎都局限于次表层沉积物中。
