摘要
本文报道了我国西南武陵山区鱼类寄生线虫一新种——鳠伍氏线虫,新种(Wuinemamysti sp.nov.);建立了伍氏属一新属(Wuinema gen.nov.),隶属于琴柏科(Quimperiidae),琴柏亚科(Quimperiinae)。
A new genus, Wuinema, and a new species, Wuinema mysti (Nematoda: Quimperiidae), from Wuling Mountain Region are reported in this paper. The general characters of the genus Wuinema are described as follows: Small nematodes with sharp point tails. Anterior part of the body with highly developed lateral alae. Mouth opening triangular without lips and cephalic papillae. A pair of sensory nerves in cervical position present. Excretory pore situated approximately at the level of anterior end of intestine. Oesophagus divided into anterior longer muscular portion and posterior shorter glandular portion. Male: with two spicules, equal and similar; gubernaculum present; a papilla-like glandular opening anterior to the anal; with preanal muscular sucker; without developed caudal alae; caudal papillae not pedunculated. Female: vulva located in the posterior part of the body; ovi parous; eggs oval or round in shape, with rather thick and smooth shells. Freshwater fish parasites. Genotype: Wuinma mysti sp. nov. Host:Mystus macropterus. Locations: Stomach and anterior intestine. Locaiities:Songtao (Youshui River), Guizhou Province; Cili(Lishui River),Hunan Province. Specimens:Holotype(1♂), allotype(1♀), paratypes (9♂♂5♀♀)are deposited in the Laboratory of Fish Diseases, Institute of Hydrobiology, Academia Sinica. Description:Whitish, small nematodes. Anterior part of the body with developed lateral alae. Head end covered with the transparent menbrane. the subcutaneous tissue of head part not curved outward. Mouth opening triangular, head without lips and papillae, and amphids inconspicuous. Cylindrical oesophagus divided into three parts: anterior to nerve ring close muscular, posterior to nerve ring loose muscular, and posterior part about one-fourth of the oesophagus glandular. Anterior end of glandular oesophagus with one nucleus, and posterior end with two nuclei. Cervical portion with a pair of sensory nerves, their endings reaching to the lateral alae. Excretory pore slightly posterior to the junction of oesophagus and intestine. Both male and female tall point, with a small processus. Male (n=10, measurements in mm.): Length of body 5.797—7.526, maximum width of body 0.101—0.172. Length of oesophagus 0.535—0.596. Nerve ring 0.212—0.263, sensory nerve 0.434—0.515 and excretory pore 0.566—0.626 from anterior extremity. Developed preanal muscular sucker present. Caudal papillae without peducule, preanal papillae 4 pairs, adanal papillae 2 pairs and postanal papillae 5 pairs, three pairs of smaller postanal papillae lateral and two pairs of bigger postanal papillae ventral. One median glandular papilla present at level of fourth pair of preanal papillae. Two spicules equal in length and similar in shape, 0.088—0.098long. Gubernaculum present, 0.030—0.040 in length. Tail curved ventrally, 0.150—0.188 in length. Caudal alae undeveloped or absent. Female (n=6, measurements in mm.): Length of body 6.572—8.618,maximum width 0.141—0.172. Length of oesophagus 0.525—0.606. Nerve ring 0.212—0.252,sensory nerve 0.434—0.495 and excretory pore 0.566—0.697 from anterior extremity. Vulva situated in posterior part of body, 4.340—5.487 and 2.232—3.131 from anterior and posterior end respectively, anterior vulvar lip undeveloped. Ovary coiled, reaching to tail posteriorly. Uterus with most eggs arranged in two or severallines. Eggs approximately round and their shells rather thick, 0.063—0.068×0.048—0.053 insize. Tail slender, 0.253—0.313 long. Discussion:The new genus Wuinema, though similar to the genus Pingus in some aspects(e.g, without lips), is distinctly different from the later in the following characters: without cephalic papillae; oesophagus consists of the anterior longer muscular part and the posterior shorter glandular one; without developed caudal alae,caudal papillae not pedunculated.
出处
《水生生物学报》
CAS
CSCD
北大核心
1992年第4期299-303,共5页
Acta Hydrobiologica Sinica
关键词
伍氏属
新属
新种
Hu伍氏线虫
Nematode of Quimperiidae, Wuinema, New genus, New species, Wuinema mysti
