Stolephorus acinaces , a new anchovy from northern Borneo, and redescription of Stolephorus andhraensis Babu Rao, 1966 (
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ORIGINAL PAPER
Stolephorus acinaces, a new anchovy from northern Borneo, and redescription of Stolephorus andhraensis Babu Rao, 1966 (Clupeiformes: Engraulidae) Harutaka Hata 1
&
Sébastien Lavoué 2 & Hiroyuki Motomura 3
Received: 10 March 2020 / Revised: 5 August 2020 / Accepted: 4 September 2020 # Senckenberg Gesellschaft für Naturforschung 2020
Abstract Stolephorus acinaces sp. nov. is described from 14 specimens from the northern coast of Borneo, Malaysia. The new species is closely related to Stolephorus andhraensis Babu Rao, 1966, which is redescribed, both species having a long upper jaw with the posterior tip beyond the posterior margin of the preopercle, no predorsal scutes, the posterior preopercular margin indented and concave, the posterior tip of the depressed pelvic fin not reaching to a vertical through the dorsal-fin origin, no dark lines on the dorsum, and no black spots below the eye. However, the former is distinguished from S. andhraensis in having higher gill raker counts on the first and second gill arches (14–16 + 21–23 = 36–38 and 9–11 + 18–20 = 27–31, respectively vs. 14–16 + 19–21 = 33–37 and 8–11 + 16–19 = 26–29, respectively in S. andhraensis), a longer caudal peduncle (19.7–21.9% SL vs. 16.9–19.9%), longer pectoral fin (14.3–15.2% SL vs. 12.8–14.4%), and shorter pelvic fin (6.7–7.6% SL vs. 7.4–8.9%). A molecular analysis showed that S. acinaces sp. nov. is the sister group of the clade (S. andhraensis, Stolephorus tamilensis Gangan, Pavan-Kumar, Jahageerdar & Jaiswar, 2020, and S. acinaces sp. nov. has about 7% mean p-distance divergence in the mitochondrial cytochrome oxidase I (COI) gene with each of the two species of this clade. Keywords Clupeomorpha . Taxonomy . India . Malaysia . Southeast Asia
Introduction Stolephorus Lacepède, 1803, an Indo-Pacific genus of marine and/or brackish water anchovies (Engraulidae), comprises 32 valid species (Whitehead et al. 1988; Wongratana et al. 1999; Kimura et al. 2009; Hata and Motomura 2018a, b, c, d; Hata
et al. 2019, 2020a, b; Gangan et al. 2020). Nine of these, Stolephorus baganensis Delsman, 1931, Stolephorus balinensis Bleeker, 1849, Stolephorus bataviensis Hardenberg, 1933, Stolephorus baweanensis Hardenberg, 1933, Stolephorus rex Jordan & Seale, 1926, Stolephorus bengalensis Dutt & Babu Rao, 1959, Stolephorus dubiosus
This article is registered in ZooBank under http://zoobank.org/ B59FF27D-AB4A-4405-A8AB-9C8074C76F48 Communicated by R. Thiel Electronic supplementary material The online version of this article (https://doi.org/10.1007/s12526-020-01115-2) contains supplementary material, which is available to authorized users. * Harutaka Hata [email protected]
1
Center for Molecular Biodiversity Research, National Museum of Nature and Science, 4-1-1 Amakubo, Tsukuba, Ibaraki 305-0005, Japan
Sébastien Lavoué [email protected]
2
School of Biological Sciences, Universiti Sains Malaysia, 11800 Penang, Malaysia
Hiroyuki Motomura [email protected]
3
The Kagoshima University Museum, 1-21-30 Korimoto, Kagoshima 890
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