Rhinogobius immaculatus, a new species of freshwater goby (Teleostei: Gobiidae) from the Qiantang River, China.

Fan Li,李帆 李帆,Jia-Kuan Chen,陈家宽 陈家宽,郦珊 郦珊,Shan Li

doi:10.24272/j.issn.2095-8137.2018.065

Fan Li, 李帆李帆 + Show 4 more

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https://doi.org/10.24272/j.issn.2095-8137.2018.065

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Abstract

A new freshwater goby, Rhinogobius immaculatus sp. nov., is described here from the Qiantang River in China. It is distinguished from all congeners by the following combination of characters: second dorsal-fin rays I, 7–9; anal-fin rays I, 6–8; pectoral-fin rays 14–15; longitudinal scales 29–31; transverse scales 7–9; predorsal scales 2–5; vertebrae 27 (rarely 28); preopercular canal absent or with two pores; a red oblique stripe below eye in males; branchiostegal membrane mostly reddish-orange, with 3–6 irregular discrete or connected red blotches on posterior branchiostegal membrane and lower operculum in males; caudal-fin base with a median black spot; and no black blotch on anterior part of first dorsal fin in males.

Highlights

IntroductionThe freshwater goby genus Rhinogobius Gill, 1859, is currently comprised of 74 valid species (Huang et al, 2016; Suzuki et al, 2017; Takahashi & Okazaki, 2017) widely distributed in East Asia, including Russia (Bogutskaya et al, 2008), Japan (Akihito et al, 2002), Korea (Regan, 1908b), China (Chen & Shao, 1996; Wu & Zhong, 2008), Philippines (Herre, 1927), Vietnam (Chen & Kottelat, 2005), Laos (Chen & Kottelat, 2003; Kottelat, 2001), Cambodia (Rainboth, 1996), and Thailand (Chen et al, 1999a)
44 species of Rhinogobius have been recorded in China (Chen et al, 2008; Chen & Miller, 2014; Huang et al, 2016; Huang & Chen, 2007; Li et al, 2007; Li & Zhong, 2007, 2009; Wu & Zhong, 2008; Yang et al, 2008), eight of which have been reported from the Qiantang River basin originating in southeastern Anhui Province to eastern Zhejiang Province
Methods for morphometric measurements and meristic counts followed Nakabo (2002), with exceptions as indicated: Standard length (SL), head length, snout length, predorsal length, and preanal length were measured from the tip of the upper lip; Head depth and width were taken at the posterior margin of the preopercle; Body depth and width were taken at the origin of the anal fin

Summary

Introduction

The freshwater goby genus Rhinogobius Gill, 1859, is currently comprised of 74 valid species (Huang et al, 2016; Suzuki et al, 2017; Takahashi & Okazaki, 2017) widely distributed in East Asia, including Russia (Bogutskaya et al, 2008), Japan (Akihito et al, 2002), Korea (Regan, 1908b), China (Chen & Shao, 1996; Wu & Zhong, 2008), Philippines (Herre, 1927), Vietnam (Chen & Kottelat, 2005), Laos (Chen & Kottelat, 2003; Kottelat, 2001), Cambodia (Rainboth, 1996), and Thailand (Chen et al, 1999a). 44 species of Rhinogobius have been recorded in China (Chen et al, 2008; Chen & Miller, 2014; Huang et al, 2016; Huang & Chen, 2007; Li et al, 2007; Li & Zhong, 2007, 2009; Wu & Zhong, 2008; Yang et al, 2008), eight of which have been reported from the Qiantang River basin originating in southeastern Anhui Province to eastern Zhejiang Province These species include R. aporus (Zhong & Wu, 1998), R. davidi (Sauvage & de Thiersant, 1874), R. cliffordpopei (Nichols, 1925), R. leavelli (Herre, 1935a), R. lentiginis (Wu & Zheng, 1985), R. niger Huang, Chen & Shao, 2016, R. similis Gill, 1859, and R. wuyiensis Li & Zhong, 2007 (Chen et al, 1990; Li, 2011; Liu et al, 2011; Suzuki et al, 2016; Zheng, 1989; Zheng & Wu, 1985). We describe a new species from three tributaries of the Qiantang River, China

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