Moravec Frantisek, Nagasawa Kazuya
Institute of Parasitology, Academy of Sciences of the Czech Republic, Branisovská 31, 370 05 Ceské Budejovice, Czech Republic.
Syst Parasitol. 2002 Jul;52(3):193-8. doi: 10.1023/a:1015785602488.
A redescription is given of Raphidascaris gigi Fujita, 1928 based on newly collected specimens from the intestine of masu salmon Oncorhynchus masou (Brevoort) in the Kinu River in Japan. The species is characterised by the absence of interlabia and lateral alae, by the presence of lips without lateral membranous flanges and by numerous pre-anal and postanal papillae in the male. Although the general morphology of this species resembles that of Ichthyascaris spp. as defined by Bruce (1990), who transferred R. biwakoensis (= R. gigi) to this genus, the absence of the alae uniting close the ventrolateral lips shows clearly that it belongs to Raphidascaris Railliet & Henry, 1915. Ichthyascaris Wu, 1949 is here considered a subgenus of Raphidascaris, and two species described in the former genus are transferred to the latter as R. gymnocraniae (Bruce, 1990) n. comb. and R. sillagoides (Bruce, 1990) n. comb. The finding of R. gigi in O. masou represents a new host record.
基于从日本木曾川的马苏大麻哈鱼（Oncorhynchus masou (Brevoort)）肠道中新采集的标本，对1928年藤田发现的吉氏针蛔（Raphidascaris gigi）进行了重新描述。该物种的特征为无唇间叶和侧翼，唇无侧膜状边缘，雄性有许多肛前和肛后乳突。尽管该物种的总体形态与布鲁斯（1990年）定义的鱼蛔属（Ichthyascaris spp.）相似，布鲁斯将琵琶湖针蛔（=吉氏针蛔）转移到了该属，但腹侧唇附近没有相连的翼清楚地表明它属于1915年的针蛔属（Raphidascaris Railliet & Henry）。1949年的鱼蛔属（Ichthyascaris Wu）在这里被认为是针蛔属的一个亚属，前者描述的两个物种被转移到后者，分别为裸头针蛔（R. gymnocraniae (Bruce, 1990)）新组合和似银鲈针蛔（R. sillagoides (Bruce, 1990)）新组合。在马苏大麻哈鱼中发现吉氏针蛔代表了一个新的宿主记录。
