Abstract
A new species of land-locked freshwater shrimp, Neocaridinafonticulatasp. n. (Atyidae), is described from Kenting, Hengchun Peninsula, Pingtung County, southern Taiwan. This new species can be distinguished from its congeners by rostrum structure, pereiopods, and male first and second pleopods. The molecular evidence of mitochondrial cytochrome oxidase subunit I (COI) also supports the establishment of a new species. This is the third endemic species of Neocaridina known from Taiwan.
Highlights
The genus Neocaridina Kubo, 1938 is a group of small-sized shrimps with a land-locked habit, inhabiting in the middle and upper reaches of rivers in East Asia, with more than 30 species recorded (Liang 2004, De Grave and Fransen 2011, Shih et al 2017)
East Asian arc, three species have been reported from Taiwan, viz. N. davidi (Bouvier, 1904), N. ketagalan Shih & Cai, 2007 and N. saccam Shih & Cai, 2007; two species from the Ryukyus, viz. N. ishigakiensis (Fujino & Shokita, 1975) and N. iriomotensis Naruse, Shokita & Cai, 2006; and two species from the main islands of Japan, viz. N. denticulata (De Haan, 1844) and N. ikiensis Shih, Cai, Niwa & Nakahara, 2017, with several introduced species reported (Naruse et al 2006, Shih and Cai 2007, Shih et al 2017)
A recent survey of the species diversity of freshwater shrimps of Taiwan showed an undescribed species from southern Taiwan with different morphological characters compared to other known species of Neocaridina, which was supported by molecular evidence
Summary
The genus Neocaridina Kubo, 1938 is a group of small-sized shrimps with a land-locked habit, inhabiting in the middle and upper reaches of rivers in East Asia, with more than 30 species recorded (Liang 2004, De Grave and Fransen 2011, Shih et al 2017). 1st pereiopod reaching slightly beyond distal end of basal segment of antennular peduncle; merus 1.8–2.1 × as long as broad, as long as carpus; carpus excavated anteriorly, shorter than chela, 1.2–1.5 × as long as high; chela 2.0–2.1 × as long as broad; fingers slightly longer than palm.
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