Holovachov Oleksandr, Boström Sven
Department of Zoology, Swedish Museum of Natural History, Box 50007, SE-104 05 Stockholm, Sweden; Email:
Department of Zoology, Swedish Museum of Natural History, Box 50007, SE-104 05 Stockholm, Sweden; Email: unknown.
Zootaxa. 2014 Jun 25;3821(5):538-50. doi: 10.11646/zootaxa.3821.5.2.
A new genus Neocamacolaimus gen. n., with one new species N. parasiticus gen. n., sp. n. is described from the benthic polychaete Sphaerosyllis cf. hystrix collected in the Skagerrak off the west coast of Sweden. Neocamacolaimus gen. n. is placed in the family Camacolaimidae and is particularly characterised by having annulated cuticle with lateral alae; setiform cephalic sensilla located at level with amphids; amphidial fovea ventrally spiral; buccal cavity without armament; pharynx muscular; nerve ring located at base of pharynx; male reproductive system diorchic with outstretched testes; spicules weakly arcuate with straight manubrium; gubernaculum absent; alveolar supplements located in the pharyngeal region; tubular supplements absent; tail conoid; caudal glands and spinneret present. Juveniles of this genus are particularly characterised by their parasitic lifestyle and the following unique morphological features: lips form a dorso-ventrally elongated perioral disc with internal sclerotizations: one midventral and two dorsosublateral (right and left); cephalic sensilla setiform, subventral sensilla are noticeably longer than the subdorsal ones; intestine extends posterior to rectum and anal opening, forming a post-anal pouch.
描述了一个新属——新卡马科莱线虫属（Neocamacolaimus gen. n.），及其一个新物种——寄生新卡马科莱线虫（Neocamacolaimus parasiticus gen. n., sp. n.），该物种采自瑞典西海岸斯卡格拉克海峡的底栖多毛纲动物斯氏球带虫（Sphaerosyllis cf. hystrix）。新卡马科莱线虫属被归入卡马科莱线虫科，其特别之处在于具有具侧翼的环纹角质层；头感器呈刚毛状，位于与侧器同一水平；侧器窝腹面呈螺旋状；口腔无武装；咽为肌肉质；神经环位于咽基部；雄性生殖系统为双睾丸型，睾丸伸展；交合刺弱弧形，柄部直；无引带；咽区有肺泡状附属物；无管状附属物；尾部呈圆锥形；有尾腺和纺器。该属幼虫的特别之处在于其寄生生活方式以及以下独特的形态特征：唇部形成一个背腹向拉长的口周盘，内部有硬化结构：一个腹中线和两个背侧亚外侧（右和左）；头感器呈刚毛状，腹侧亚感器明显长于背侧亚感器；肠道延伸至直肠和肛门开口后方，形成一个肛后袋。
