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Acropoma musorstom, a new lanternbelly (Acropomatidae) from the South Pacific and the first record of Acropoma splendens from the Andaman Sea off southwestern Thailand


A new species of the genus Acropoma, A. musorstom sp. nov. is described based on four specimens (126.3–143.0 mm in standard length: SL) collected from Vanuatu and the Molucca Islands, Indonesia. The present species is distinguished from other congeners by a combination of the following characters: luminous gland short, U-shaped around anus; luminous-gland length 10.3–13.7% SL; symphysis of lower jaw not protruded; proximal radial of first anal-fin pterygiophore with concavity on anterior surface; anus situated closer to pelvic-fin insertion than to origin of anal fin; weakly ctenoid scales on lateral side of body; vertical line on cheek absent; scales between first dorsal-fin base and lateral line 4; pectoral-fin rays 16–17; and gill rakers 20–21. Acropoma splendens (Lloyd 1909) collected from off Phuket, it represents the first record of this species from the Andaman Sea off southwestern Thailand. A key to the species of Acropoma currently known from the Indo-Pacific is provided.

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We are grateful to the following persons and institutions for specimen loans: M. McGrouther, A. Hay and S. Reader (AMS); M. Arce and M. Sabaj (ANSP); A. Suzumoto and L. O’Hara (BPBM); D. Catania and M. Hoang (CAS); A. Graham (CSIRO); S. Kimura (FRLM); T. Asahida (FSKU); D. Golani (HUJ); R. Causse and Z. Gabsi (MNHN); G. Shinohara and M. Nakae (NSMT); and J. Williams, D. Pitassy and E. Wilbur (USNM). We also thank J. Williams (USNM) for critical reading of the manuscript. Acropoma splendens was collected by U. Satapoomin (PMBC) from the Andaman Sea, then some of them being donated to KAUM. Vietnamese KAUM specimens were collected with the support of the Institute of Marine Environment and Resources (Haiphone) and the Ha Long Bay Management Department (Ha Long), with permission for the use of specimens granted by the Biodiversity Conservation Agency, Ministry of Natural Resources and Environment (Hanoi). This study was supported in part by JSPS KAKENHI Grant Numbers JP23580259, JP26450265, and 20H03311; the JSPS Core-to-Core Program: B Asia-Africa Science Platforms; the “Biological Properties of Biodiversity Hotspots in Japan” project of the National Museum of Nature and Science, Tsukuba, Japan; and the “Establishment of Glocal Research and Education Network in the Amami Islands” project of Kagoshima University adopted by the Ministry of Education, Culture, Sports, Science and Technology, Japan.

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Okamoto, M., Randall, J.E. & Motomura, H. Acropoma musorstom, a new lanternbelly (Acropomatidae) from the South Pacific and the first record of Acropoma splendens from the Andaman Sea off southwestern Thailand. Ichthyol Res 68, 517–528 (2021).

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