Evolution of reproductive features and larval development in the genus Amphiglena (Polychaeta: Sabellidae)
Evolution of reproductive features and larval development in the genus Amphiglena (Polychaeta: Sabellidae)
复制标题
Amphiglena 属（多毛类：Sabellidae）生殖特征和幼虫发育的进化
DOI：
--
复制
发表时间：
1998
期刊：
影响因子：
--
通讯作者：
M. Gambi
中科院分区：
文献类型：
--
作者：
G. Rouse;M. Gambi
摘要中间端沟两栖虫的幼虫在亲代管中直接发育，幼虫在幼年时爬走，有一个能够取食的放射状冠。非取食性幼虫的幼虫期为10 d。颌最初在父母管中孵化，然后在定居和发育放射冠之前有一个游泳阶段。发育数据和生殖功能，如精子结构与其他形态学数据相结合的物种的分支关系在Amphiglena属的评估。两个物种的Laonome包括作为内组的一部分。六属，代表一个姐妹群的Laonome/Amphiglena分支，被用作外群。两个最简约的分支图被发现，生殖功能的进化进行了讨论。Amphiglena的单系性由先前确定的特征以及基于精子形态的两个特征表示。目前，一个近形幼虫形式不能确定的属Amphiglena。
Abstract Larval development in Amphiglena mediterranea is direct in the parental tube, and larvae crawl away as young juveniles with a radiolar crown capable of feeding. The non-feeding larvae of A. nathae are initially brooded in the parental tube, and then have a swimming phase before settling and developing a radiolar crown. Developmental data and reproductive features such as sperm structure are combined with other morphological data for an assessment of the cladistic relationships of the species in the genus Amphiglena. Two species of Laonome are included as part of the ingroup. Six genera, representing a sister group to the Laonome/Amphiglena clade, are used as an outgroup. Two most-parsimonious cladograms were found, and the evolution of reproductive features are discussed. The monophyly of Amphiglena is indicated by features previously identified, as well as two features based on sperm morphology. At present a plesiomorphic larval form cannot be identified for the genus Amphiglena.