刺科线虫中国新记录种—纤细居中线虫(Geocenamus tenuidens)的描述

Description of one New Recorded Species of Belonolaimidae in China

详细描述了植物寄生线虫新记录属居中属(Geocenamus)的一新记录种———纤细居中线虫(Geocenamustenuidens)。居中属线虫是我国首次发现的刺科线虫的一新记录属。纤细居中线虫的鉴别特征为虫体环纹明显 ;头区显著缢缩 ,鳞球状 ,头环5个 ;口孔突出 ;口针纤细 ,锥部长于杆部 ;侧线6条 ;雌虫阴门凹陷 ,阴道壁加厚 ,具有阴门唇 ;双卵巢 ,对伸 ;尾较短 ,亚圆筒形 ,末端具环纹 ;雄虫尾轻微弯曲 ,宽阔的交合伞包至尾端 ;交合刺不伸出泄殖腔。该种线虫与其近缘种北方居中线虫(Geocenamusarctic)的区别 :纤细居中线虫口针相对较短 ,尾末端具环纹 ;北方居中线虫口针较长 。

Geocenamus tenuidens was described and it was first reported in China.The new recorded species is characterized:An-nuales conspicurus.broad lip region with five annules,set off by deep constriction,bulbous,stylet slender,cone longer than shaft,with sloping knobs,lateral field with6incisures.Tail cylindroid with bluntly rounded,cuticulate terminus.Vulva cavity with a small epitygmata,vagina vera thickened,male tail arcuate,gubernaculums not protruding from cloaca.Geocenamus arctic is very resemble with the species.However,Geocenamus tenuidens has shoter stylet and annulated tail end,Geocenamus arctic has longer stylet and smooth tail end.