Xi Bing Wen, Oros Mikulás, Wang Gui Tang, Scholz Tomás, Xie Jun
Key Laboratory of Freshwater Fisheries and Germplasm Resources Utilization, Ministry of Agriculture, Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences, Wuxi, China.
Folia Parasitol (Praha). 2013 May;60(2):141-8. doi: 10.14411/fp.2013.015.
Khawia abbottinae sp. n. is described from the Chinese false gudgeon, Abbottina rivularis (Basilewsky) (Cyprinidae: Gobioninae), from the Yangtze River basin in China. The new species can be distinguished from the congeneric species mainly by the arrangements of the testes, which form two longitudinal bands (other congeneric species have the testes irregularly scattered throughout the testicular region) and their number (at maximum 85 testes versus at least 160 in the other Khawia spp.), and the morphology of the scolex, which varies from cuneiform to widely bulbate scolex, being separated from the remaining body by a short neck and possessing a smooth, blunt or rounded anterior margin. Other typical features of K. abbottinae are its small size (total length less than 1.5 cm) and body shape, with the maximum width at its first third. The distinct status of the new species was confirmed by molecular data (ssrDNA and ITS1 sequences). Phylogenetic analyses revealed a close relationship of the new species with K. rossittensis (Szidat, 1937) and K. parva (Zmeev, 1936), parasites of crucian carp and goldfish (Carassius spp.), but both species markedly differ from K. abbottinae in their morphology. Until now, five valid species of Khawia (K. abbottinae, K. japonensis, K. rossittensis, K. saurogobii and K. sinensis) have been reported from China.
新种阿氏卡维吸虫（Khawia abbottinae sp. n.）是在中国长江流域的中华细鲫（Abbottina rivularis (Basilewsky)，鲤科：鮈亚科）中发现并描述的。该新物种与同属其他物种的主要区别在于睾丸的排列方式，其睾丸形成两条纵向带（其他同属物种的睾丸不规则地散布于整个睾丸区域）及其数量（最多85个睾丸，而其他卡维吸虫属物种至少有I60个），以及头节的形态，头节从楔形到宽球形不等，通过短颈部与身体其他部分分开，前缘光滑、钝圆或呈圆形。阿氏卡维吸虫的其他典型特征是其体型小（全长小于1.5厘米）和身体形状，最大宽度位于身体前三分之一处。新物种的独特地位通过分子数据（小亚基核糖体DNA和ITS1序列）得到了证实。系统发育分析表明，该新物种与寄生于鲫鱼和金鱼（鲫属物种）的罗氏卡维吸虫（Khawia rossittensis (Szidat, 1937)）和小型卡维吸虫（Khawia parva (Zmeev, 1936)）关系密切，但这两个物种在形态上与阿氏卡维吸虫明显不同。到目前为止，中国已报道了卡维吸虫属的五个有效物种（阿氏卡维吸虫、日本卡维吸虫、罗氏卡维吸虫、蜥形卡维吸虫和中华卡维吸虫）。
