伊朗淡水盆地地下片足类Niphargus(甲壳纲,Malacostraca)的地方性简约性分析

Somayeh Esmaeili-Rineh
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摘要

片足目是分布在全球所有环境和虚拟栖息地的最多样化的分类群之一。Niphargus属是古北西部地下两栖动物群的重要组成部分。只有某些地区有片脚类动物的发生和分布的准确资料。本研究采用地方性简约分析(PAE)方法,分析了伊朗Elburz和Zagros山脉沿岸严格分布于盆地或次盆地水平的两足类淡水Niphargus属的分布。利用计算机程序PAUP* 4.0a166,对Niphargus属的27个分类群和13个区域建立数据矩阵进行分析。生根是在一个假设的全零的外群体上进行的。采用精确算法启发式搜索,得到了30步的共识树,一致性指数为0.9,保留指数为0.1。根据27种niphaphaus的分布情况,在研究区划分了5个特有区,最小有2种。西部界河1次流域有6种,其次是乌尔米亚和西部界河2次流域有3种。
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Parsimony Analysis of Endemicity (PAE) in Iranian freshwater basins based on subterranean amphipods genus Niphargus (Crustacea, Malacostraca)
The order Amphipoda is one of the most diverse taxa that globally distributed in all environments and virtually habitats. The members of genus Niphargus represent an important part of the Western Palearctic subterranean amphipoda fauna. Accurate data on the occurrence and distribution of amphipods are only available for some regions. In this study, we were applied Parsimony analysis of endemicity (PAE) to analyze the distribution of amphipod freshwater genus Niphargus occurring strictly at the basin or sub-basin level along of Elburz and Zagros Mountains in Iran. The analysis was carried out using the computer program PAUP* 4.0a166, based on a data matrix built with 27 taxa and 13 areas for genus Niphargus. The rooting was made on a hypothetical all-zero out-group. Applying the exact algorithm heuristic search, the consensus tree was obtained with 30 steps, a consistency index of 0.9, and a retention index of 0.1. The procedure based on distributions of the 27 species of Niphargus delimited five areas of endemism in the study area with minimum two species. The high levels of endemism observed in West boundary rivers1 sub basin with six species and then in Urmia and West boundary rivers2 sub basins with three species.
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