Fox Thomas H, Jespersen Ase, Lützen Jørgen
North Georgia College and State University, Dahlonega, Georgia, USA.
J Morphol. 2007 Nov;268(11):936-52. doi: 10.1002/jmor.10538.
The histology of the reproductive organs is studied in the protandric hermaphroditic Tellimya ferruginosa. In NW Europe the species reproduces from May through August. Sperm transfer takes place when mature testis follicles are transplanted to the gills or walls of the mantle cavity in recipient hermaphroditic or female bivalves. Transplantation is accompanied by histological changes and sperm cells are released when transplants perish with age. Details are given on the reproduction in Montacuta percompressa which takes place from March through October in North Carolina, USA. All shelled bivalves are females and it is postulated that spermatogenic bodies attached to gills or other surfaces in the female's mantle cavity and previously considered to be dwarf males arise from transplanted larval gonads. The ultrastructure of the euspermatozoa and/or the anucleate paraspermatozoa is described in T. ferruginosa, T. tenella, and M. percompressa. The sperm of the first two species share a number of significant apomorphies with those of another montacutid, Brachiomya stigmatica. In the simultaneous hermaphroditic M. substriata the nucleate paraspermatozoa associate with the euspermatozoa to form spherical spermatozeugmata that are stored in the testis.
在雄性先熟的雌雄同体的铁锈色特利米亚蛤中研究了生殖器官的组织学。在欧洲西北部，该物种从五月到八月进行繁殖。当成熟的睾丸滤泡被移植到接受移植的雌雄同体或雌性双壳贝类的鳃或外套腔壁上时，精子就会发生转移。移植伴随着组织学变化，随着移植体随时间消亡，精子细胞会被释放出来。文中详细介绍了美国北卡罗来纳州的紧密蒙特卡塔蛤的繁殖情况，其繁殖时间为三月到十月。所有有壳双壳贝类都是雌性，据推测，附着在雌性外套腔鳃或其他表面上、以前被认为是侏儒雄性的生精体源自移植的幼虫性腺。文中描述了铁锈色特利米亚蛤、细特利米亚蛤和紧密蒙特卡塔蛤的真精子和/或无核副精子的超微结构。前两个物种的精子与另一种蒙特卡塔蛤科的有斑腕蛤的精子有许多显著的共同衍征。在同时雌雄同体的细纹蒙特卡塔蛤中，有核副精子与真精子结合形成球形精子束，储存在睾丸中。
