Description and molecular phylogeny of Axinella nayaritensis n. sp. (Porifera: Axinellida) from East Pacific and remarks about the polyphyly of the genus Axinella.
Description and molecular phylogeny of Axinella nayaritensis n. sp. (Porifera: Axinellida) from East Pacific and remarks about the polyphyly of the genus Axinella.
复制标题
Axinella nayaritensis n. 的描述和分子系统发育。
作者：
J. Carballo;E. Bautista‐Guerrero;J. A. Cruz
纳亚里特轴孢菌sp.是Axinella属的一个典型种，具有穗状（oxeas和styles），骨骼排列（轴向浓缩，从中辐射出轴外plumoreticulated骨架）和外部形式（乔木状）。新物种是橙子，分枝，高达25厘米，通常生活在柔软的底部。该新种最显著的特征之一是其含水系统，该系统由一个围绕整个分支长度的浅运河和蜿蜒的山脊系统形成。该种与墨西哥湾的Axinellapolycapella在形态上非常接近，在18S核糖体RNA区域具有很高的相似性。还将其与Axinella aruensis进行了比较，Axinella aruensis是从形态学角度来看非常不同的物种，其分布于澳大利亚北方、印度尼西亚和巴布亚新几内亚，因为这两个物种在COI线粒体基因区具有高度相似性。Gazave et al.（2010）根据18S和COI将该新种纳入Axinella分支，其中还包括8个Axinella种。在这个分支中的物种是典型的乔木与choanosomal骨架轴向和轴外区域之间的区别。纳亚里特轴孢菌sp.构成了东太平洋海岸Axinella的第一个记录。
Axinella nayaritensis n. sp. is a typical species of the genus Axinella in spiculation (oxeas and styles), skeletal arrangement (axial condensation from which radiate an extra-axial plumoreticulated skeleton), and external form (arborescent). The new species is orange, branching, up to 25 cm in height, and which usually live in soft bottoms. One of the most conspicuous characteristic of the new species is its aquiferous system, which is formed by a system of superficial canals and meandering ridges which run around the entire length of the branches. The species is compared with Axinella polycapella from Gulf of Mexico, which is very close in morphology, and which it shares a high similarity in the 18S ribosomal RNA region. It was also compared with Axinella aruensis, a very different species from a morphological point of view, which is distributed throughout the northern Australia, Indonesia and Papua New Guinea as both species share a high similarity in the COI mitochondrial gene region. The new species was included in the clade named Axinella by Gazave et al. (2010) for 18S and COI, where also are included eight Axinella-species. Species in this clade are typically arborescent with a choanosomal skeleton differentiated between axial and extra-axial regions. Axinella nayaritensis n. sp. constitute the first record of an Axinella for the east Pacific coast.