Eurythoe complanata (Polychaeta: Amphinomidae), the 'cosmopolitan' fireworm, consists of at least three cryptic species
Eurythoe complanata (Polychaeta: Amphinomidae), the 'cosmopolitan' fireworm, consists of at least three cryptic species
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DOI：
10.1007/s00227-009-1296-9
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发表时间：
2010-01-01
期刊：
影响因子：
2.4
通讯作者：
Paiva, Paulo C.
中科院分区：
文献类型：
--
作者：
Barroso, Romulo;Klautau, Michelle;Paiva, Paulo C.
在其地理分布范围内，Eurythoe complanata （Pallas 1766）被认为是一个具有巨大形态相似性的世界性物种。为了阐明拟平叶拟龙是否为单一物种，我们比较了来自太平洋、加勒比海和南大西洋的拟平叶拟龙的遗传（细胞色素氧化酶亚基I和同酶）和形态差异。高水平的COI差异（10-22%）和诊断等位酶位点确定了三个隐物种：一个在东太平洋，两个在大西洋，其中一个在形态上分化，仅在岛屿上发现。与其他跨地峡无脊椎动物相比，太平洋和大西洋谱系之间的COI序列差异更大，表明它们在巴拿马地峡关闭之前就分裂了，或者该物种的COI进化速度更快。两个大西洋物种的存在可能是大西洋岛屿上的异栖物种形成后的二次入侵，甚至是同栖物种形成的结果。
Eurythoe complanata (Pallas 1766) has been considered a cosmopolitan species with a great morphological similarity across its geographic range. To elucidate whether E. complanata is actually a single species, genetic (cytochrome oxidase subunit I and allozymes) and morphological differences were compared among specimens from the Pacific, Caribbean, and South Atlantic Oceans. Large levels of COI divergence (10-22%) and diagnostic allozyme loci identified three cryptic species: one in the eastern Pacific and two in the Atlantic, with one being morphologically differentiated and found only in islands. COI sequences between Pacific and Atlantic lineages were much more divergent than those of other transisthmian invertebrates, indicating their split before the Panama Isthmus closure or a faster evolutionary rate of COI for this species. The existence of two Atlantic species may be a consequence of parapatric speciation followed by a secondary invasion or even a sympatric speciation in the Atlantic oceanic islands.