Galíndez E J, Díaz-Andrade M C, Avaca M S, Estecondo S
Departamento Biología, Bioquímica y Farmacia, Universidad Nacional de San Juan, Bahía Blanca, Buenos Aires, Argentina.
Braz J Biol. 2010 May;70(2):325-33. doi: 10.1590/s1519-69842010005000002. Epub 2010 Mar 19.
The oviductal gland is an exclusive structure of cartilaginous fishes that produces the egg jelly, forms the tertiary egg envelopes and stores sperm. The biological importance of this structure is related to the special features of the reproductive strategy of the group and to its phylogeny, considering that egg-laying is the ancestral condition in this fish (Dulvy and Reynolds, 1997). This gland of the smallnose fanskate shows four morphofunctional zones. The lining epithelium along the gland is columnar with secretory and ciliated cells. Secretions are mucous and/or proteic according to the zone, and to their specific functions. This is the first report about the microanatomy of the female reproductive tract of S. bonapartii with evidence of sperm storage in the genus.
输卵管腺是软骨鱼类特有的结构，它产生卵胶膜，形成三级卵膜并储存精子。考虑到产卵是这类鱼的原始特征（Dulvy和Reynolds，1997），该结构的生物学重要性与其生殖策略的特殊特征及其系统发育有关。小鼻扇鳐的这种腺体有四个形态功能区。腺体沿线的衬里上皮为柱状，有分泌细胞和纤毛细胞。分泌物根据区域及其特定功能为粘液性和/或蛋白质性。这是关于波拿巴氏鳐雌性生殖道微观解剖学的首次报告，且有该属中精子储存的证据。
