Two new species of Rhinogobius (Gobiiformes: Oxudercidae) from Palawan, Philippines, with their phylogenetic placement
Two new species of Rhinogobius (Gobiiformes: Oxudercidae) from Palawan, Philippines, with their phylogenetic placement
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DOI：
10.11646/zootaxa.5068.1.3
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发表时间：
2021-11-15
期刊：
影响因子：
0.9
通讯作者：
Palla, Herminie P.
中科院分区：
文献类型：
--
作者：
Maeda, Ken;Shinzato, Chuya;Palla, Herminie P.
描述了在菲律宾巴拉望岛中部溪流中发现的两个犀牛新种。这两个新种，Ehinogobius estrellae和Rhinogobius tandikan与Rhinogobius similis Gill，1859在面颊上具有独特的横向感觉乳突，但在鳍线计数、鳞片排列等方面与后者不同。这两个新种在胸鳍线计数、纵向和背部前鳞片计数以及身体的颜色上相互区别。在流入苏鲁海的马拉高河水系和流入南中国海的卡尤洛河中的溪流中，分别发现了菊头蝠新种和丹迪坎新种。马拉高河水系是犀牛属最南端的栖息地。Rhinogobius similis曾被认为是该属最基本的谱系的唯一成员，但我们的线粒体基因组分析表明，这两个新种是这个谱系的额外成员。它们被认为是它们与相似乳杆菌的共同祖先的遗物，可能分布更广。
Two new species of Rhinogobius found in streams on central part of Palawan Island, Philippines are described. The two new species, Rhinogobius estrellae and Rhinogobius tandikan share unique transverse rows of sensory papillae on the cheek with Rhinogobius similis Gill, 1859, but differ from the latter in fin ray counts, arrangement of the scales, etc. The two new species are distinguished from each other by the pectoral-fin ray count, the longitudinal-and predorsal-scale counts, and colouration of the body. Rhinogobius estrellae new species and R. tandikan new species have been found allopatrically in a stream within Malatgao River system flowing into the Sulu Sea and in the Cayulo River flowing into the South China Sea, respectively. The Malatgao River system is the southernmost habitat of the genus Rhinogobius. Rhinogobius similis had been considered as the only member of the most basal lineage of this genus, but our mitochondrial genome analysis suggested that the two new species are additional members of this lineage. They are considered to be relicts of their common ancestor with R. similis, which probably had a wider distribution.