A new species of Thrissina from the northwestern Pacific Ocean, with redescription of Thrissina adelae (Rutter 1897) (Clupeiformes: Engraulidae)

Resurrection and redescriptions of nominal species previously regarded as synonyms of Thrissina mystax (Bloch and Schneider, 1801) (Teleostei: Clupeiformes: Engraulidae)

“…Among all valid species of the genus Thrissina , only 12 species, (the 3 species redescribed herein [ T. mystax , T. porava , and T. valenciennesi ] and 9 others, Thrissina adelae Rutter, 1897, Thrissina cultella Hata & Motomura, 2019, Thrissina dayi Wongratana, 1983, Thrissina dussumieri Valenciennes, 1848, Thrissina serena Hata & Motomura, 2019, Thrissina setirostris Broussonet, 1782, Thrissina splendida Hata, 2022, Thrissina stenosoma Wongratana, 1983, and Thrissina vitrirostris Gilchrist & Thompson, 1908), have a long maxilla posteriorly reaching to the pectoral‐fin insertion. T. dussumieri and T. setirostris are easily distinguishable from T. mystax , T. porava , and T. valenciennesi by the very long maxilla, reaching at least halfway along the pectoral fin to the pelvic‐fin base (just reaching or slightly short of the pectoral‐fin base end in the latter three species).…”

“…Although the genus was reviewed by Whitehead et al (1988), who recognized 24 valid species, taxonomic research of the genus has progressed in recent years by the authors' research group. Because the recent studies described many new species and reassessed taxonomic status of various nominal species related to the genus, there are currently 35 valid species in this genus (Gill et al, 2018; Hata, 2020, 2022; Hata et al, 2020, 2021, 2022a; Hata & Koeda, 2020; Hata, Lavoué, Bogorodsky, et al, 2023; Hata, Lavoué, Chunthanawong, & Motomura, 2023; Hata, Mandagi, & Masengi, 2023; Hata & Motomura, 2019; Hata & Nakae, 2019; Roberts, 1978; Whitehead et al, 1988; Wongratana, 1983, 1987; Wongratana et al, 1999).…”

A New Species of Thrissina from the Andaman Sea and Re-assessment of the Taxonomic Status of Thrissina cuvierii (Swainson, 1839) and Thrissina malabarica (Bloch, 1795) (Teleostei: Clupeiformes: Engraulidae: Coiliinae)

“…Morphological comparisons.— Thrissina cuvierii can be distinguished from all other congeners, except for Thrissina aurora , new species, by its moderate maxilla length, the posterior tip being only slightly beyond the posterior margin of the opercle (not reaching the pectoral-fin insertion), deep body (> 33% of SL), 1LGR 20 or less, abdomen covered with 23–25 keeled scutes, and 35–39 branched rays in the anal fin (Wongratana, 1983; Whitehead et al, 1988; Wongratana et al, 1999; Hata and Motomura, 2019; Hata et al, 2020, 2021, 2022, 2023; Hata, 2022; this study). Detailed comparisons of T. cuvierii with T. aurora , new species, are included in Remarks under the latter.…”

“…6) and branched anal-fin rays (34 vs. 35–39; Table 4). The aforementioned meristics have often been used for identification of species of the genus (Wongratana, 1983; Whitehead et al, 1988; Wongratana et al, 1999; Hata and Motomura, 2019; Hata et al, 2020, 2021, 2022; Hata, 2022). Additional morphometric characters useful for distinguishing between the new species and T. cuvierii include snout tip to pectoral-fin insertion, dorsal-fin base length, caudal-peduncle length, caudal-peduncle depth, distance between the dorsal- and anal-fin origins, and snout length (Table 5; Fig.…”

“…Thrissina , a widely distributed Indo-West Pacific genus, comprises 34 valid species (Roberts, 1978; Wongratana, 1983, 1987; Whitehead et al, 1988; Wongratana et al, 1999; Gill et al, 2018; Hata and Motomura, 2019; Hata and Nakae, 2019; Hata, 2020, 2022; Hata and Koeda, 2020, 2021; Hata et al, 2020, 2021, 2022, 2023). Among them, an Indian Ocean species with a distinctly deep body has been treated as Thrissina malabarica (Bloch, 1795; e.g., Nair, 1953; Misra, 1976; Whitehead et al, 1988; Psomadakis et al, 2015).…”