Thrissina invicta, a new anchovy from Philippines
Thrissina invicta sp. nov. is described based on 46 specimens collected from Philippine Islands. The new species is morphologically most similar to Thrissina katana Hata, Lavoué and Motomura 2022, Thrissina malabarica (Bloch 1795), and Thrissina mystica Hata, Lavoué and Motomura 2025, three species previously included in “Thryssa hamiltonii.” However, Thrissina invicta sp. nov. differs from these species by several morphological metrics including higher counts of gill rakers and lower counts of vertebrae, as well as both a longer head and a deeper body. The speciation between the new species and the related species is thought to be promoted by long isolation of the Philippine of shelf areas around the Philippine Islands from those around Sundaland. With this new species, a total of six species of Thrissina have been confirmed to be distributed in the Philippines.
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