Gordionus chinensis and Gordionus kii sp. nov. (Nematomorpha: Gordiida), New Reports of the Genus Gordionus in Japan
Gordionus chinensis and Gordionus kii sp. nov. (Nematomorpha: Gordiida), New Reports of the Genus Gordionus in Japan
复制标题
Gordionus chinensis 和 Gordionus kii sp.
DOI：
10.12782/specdiv.14.61
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发表时间：
2009
期刊：
影响因子：
--
通讯作者：
Takuya Sato
中科院分区：
文献类型：
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作者：
A. Schmidt;Takuya Sato
日本已知淡水马毛蠕虫4属11种（Gordiida，Nematomorpha）。可能存在Gordionus属的代表，但直到现在可用的材料还不允许这样的确定。本文报道了采自奈良县弓手原川的几个中国大头鱼（Gordionuschinensis，Villot，1874）标本，它们与该物种的原始描述仅在一个微小的细节上有所不同。该物种的特征是在角质层小巢之间出现稀疏的节状结构。在日本的标本中，这些球结出现在成对相邻小巢之间的共同边界的中点，也出现在几个小巢相遇的角落，但在中国的正模标本中，这些球结只出现在前一个位置。来自同一地点的一个雄性标本与其他标本明显不同，在泄殖腔开口两侧有较短的刚毛，尾叶内侧有较长的刺。我们认为它代表了一个新种，在此命名为Gordionus kii。
Eleven species representing four genera of freshwater horsehair worms (Gordiida, Nematomorpha) have been known from Japan. The presence of representatives of the genus Gordionus was likely, but until now the available material did not allow such a determination. We here report several specimens of Gordionus chinensis (Villot, 1874) from the Yumitehara River in Nara Prefecture, which differ only in one minute detail from the original description of this species. Characteristic for this species are sparse knoblike structures occurring between the cuticular areoles. In the Japanese specimens, these knobs occur at the midpoint of the common border between pairs of neighbouring areoles and also in the corners where several areoles meet, but in the description of the Chinese holotype, such knobs occur only in the former position. One male specimen from the same locality differs distinctly from the others in having shorter bristles flanking the cloacal opening and longer spines on the inner sides of the tail lobes. We regard it as representing a new species, herein named Gordionus kii.