The porcellanid genus Enosteoides Johnson, 1970, currently containing six species, was raised in the 1970s to contain aberrant Indo–West Pacific forms of the diverse and cosmopolitan genus Porcellana Lamarck, 1801. Here, we describe the most aberrant form as Enosteoides spinosussp. nov., from the northeast and northwest coasts of Australia and present results on phylogenetic reconstructions of the genus, based on an 1,870 bp alignment of concatenated DNA sequences of three mitochondrial and one nuclear gene. The new species is peculiarly spiny and has a higher morphological affinity to the type species of the genus, E. ornatus (Stimpson, 1858), than to the other congeneric species. Our molecular results indicate that Enosteoides is not monophyletic. The new species and E. ornatus are encompassed in a clade, which does not share immediate common ancestry with the clade containing the other species of Enosteoides. This clade is more closely related to species of Porcellana and Pisidia. Relatively large interspecific genetic distances between and within the two clades, as compared to distances estimated in American pairs of species on each side of the Panama Isthmus, suggest ancient divergence, probably followed by extinction events or low speciation rate. Relatively large intraspecific distances between Australian populations of the new species of Enosteoides from geographically distant locations suggest some level of phylogeographic structure.

中文翻译：

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印度 - 西太平洋属 Enosteoides（甲壳纲、十足目、猪科）的多基因系统发育以及澳大利亚新物种的描述

porcellanid 属 Enosteoides Johnson，1970 年，目前包含六个物种，在 1970 年代被饲养，以包含多样性和世界性的 Porcellana Lamarck 属的异常印度-西太平洋形式，1801 年。在这里，我们将最异常的形式描述为 Enosteoides spinosussp。11 月 11 日，来自澳大利亚东北部和西北海岸，并基于三个线粒体和一个核基因的串联 DNA 序列的 1,870 bp 比对，展示了该属的系统发育重建结果。与其他同属物种相比，这个新物种特别多刺并且与该属的模式物种 E. ornatus (Stimpson, 1858) 具有更高的形态亲和性。我们的分子结果表明 Enosteoides 不是单系的。新物种和 E. ornatus 包含在一个进化枝中，它与含有其他内骨类的进化枝没有直接的共同祖先。这个进化枝与 Porcellana 和 Pisidia 的物种关系更密切。与巴拿马地峡两侧的美洲物种对估计的距离相比，两个进化枝之间和内部的相对较大的种间遗传距离表明存在古代分歧，可能随后是灭绝事件或低物种形成率。来自地理上遥远位置的新物种的澳大利亚种群之间相对较大的种内距离表明某种程度的系统地理结构。与巴拿马地峡两侧的美洲物种对估计的距离相比，两个进化枝之间和内部的相对较大的种间遗传距离表明存在古代分歧，可能随后是灭绝事件或低物种形成率。来自地理上遥远位置的新物种的澳大利亚种群之间相对较大的种内距离表明某种程度的系统地理结构。与巴拿马地峡两侧的美洲物种对估计的距离相比，两个进化枝之间和内部的相对较大的种间遗传距离表明存在古代分歧，可能随后是灭绝事件或低物种形成率。来自地理上遥远位置的新物种的澳大利亚种群之间相对较大的种内距离表明某种程度的系统地理结构。