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| Thrissina aurora Hata, Lavoué, Chungthanawong & Motomura, 2023 Sunrise Thryssa || DOI: 10.1643/i2023001 |
Abstract
Examination of the original description of Thrissina malabarica (Bloch, 1795), a name previously applied to an Indian Ocean species with a distinctly deep body, revealed that the former nominal species was actually a senior synonym of Thrissina hamiltonii (Gray, 1835), a slender-bodied Indo-West Pacific species. The applicable name for the species previously treated as T. malabarica is Thrissina cuvierii (Swainson, 1839). To stabilize the taxonomic status of these three nominal species, a neotype for T. cuvierii is designated. In addition, Thrissina aurora, new species, is described from a specimen collected from the Andaman Sea near Phuket, Thailand. Although both the new species and T. cuvierii share a deep body, the former is distinguished by lower counts of gill rakers and anal-fin rays than the latter. The mitochondrial cytochrome oxidase I (COI) haplotype network of 11 specimens of T. cuvierii and three specimens (including the holotype) of T. aurora, new species, revealed 22 nucleotide differences between the two species, corresponding to 3.4% mean uncorrected genetic distance.
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| Holotype of Thrissina aurora, new species, THNHM-F 021939, 146.7 mm SL, Phuket, Thailand. (A) Fresh condition; (B) preserved condition. |
Thrissina aurora, new species
Common Name: Sunrise Thryssa
Etymology.—The specific name “aurora,” meaning “dawn”
in Latin, is derived from the bright yellow and orangish colors of the new species, reminiscent of sunrise.
Harutaka Hata, Sébastien Lavoué, Sirikanya Chungthanawong and Hiroyuki Motomura. 2023. 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). Ichthyology & Herpetology., 111(4); 549-562. DOI: 10.1643/i2023001
