Tkach V V
Department of Parasitology, Ukrainian Academy of Sciences, Kiev, Ukraine.
Parasite. 1994 Jun;1(2):161-5. doi: 10.1051/parasite/1994012161.
Genus Coronacanthus Spassky, 1954 contains three species--C. integra (Hamann, 1891), C. omissa (Baer et Joyeux 1943) and C. vassilevi Genov, 1980--but larval stages of only first two species were described before. During 1991-1993 cysticercoids of all three species were found from gammarid crustaceans in Eastern Carpathians. The article contains an illustrated description of the cysticercoid of C. vassilevi. It differs considerably from the formerly known Coronacanthus larvae by the egg-shaped (not lens-shaped) form of the cyst, absence of marginal thickening of the cyst wall, by the shape and length of cercomer and besides, by the invagination of the anterior part of the scolex. Microvilli on the cyst surface were not detected with light microscope. Cercomer of C. vassilevi is narrow and very long as for mammalian hymenolepidid (4.7 to 8 times longer than cyst). The number (37-38), length (8-9 microns) and shape of rostellar hooks well correspond to those of adult worms (Genov, 1980).
冠状棘属（Coronacanthus）由斯帕斯基（Spassky）于1954年建立，包含三个物种，即完整冠状棘（Coronacanthus integra，哈曼，1891年）、遗漏冠状棘（C. omissa，贝尔和乔约克斯，1943年）以及瓦西列夫冠状棘（C. vassilevi，热诺夫，1980年），但此前仅描述了前两个物种的幼虫阶段。1991年至1993年期间，在东喀尔巴阡山脉的钩虾类甲壳动物中发现了所有这三个物种的拟囊尾蚴。本文包含了瓦西列夫冠状棘拟囊尾蚴的图文描述。它与此前已知的冠状棘属幼虫有很大不同，其囊呈卵形（而非透镜形），囊壁无边缘增厚，尾器的形状和长度不同，此外，头节前部有内陷。用光学显微镜未检测到囊表面的微绒毛。瓦西列夫冠状棘的尾器狭窄且非常长，与哺乳动物膜壳绦虫相比（比囊长4.7至8倍）。顶突钩的数量（37 - 38个）、长度（8 - 9微米）和形状与成虫（热诺夫，1980年）非常相符。
