Description of a new species of the genus Acropoma (Acropomatidae) from the Arafura Sea with a redescription of Acropoma leobergi Prokofiev 2018 and the first record of Acropoma boholensis Yamanoue and Matsuura 2002 from the South China Sea

摘要

A new species of the genus Acropoma, A. arafurensis sp. nov., is described based on two specimens (57.3-76.2 mm standard length: SL) collected from the Arafura Sea. The present species is distinguished from other congeners by a combination of the following characters: luminous gland U-shaped extending from throat to posterior tip of pectoral fin; luminous-gland length 29.5-32.0% SL; symphysis of lower jaw not sharply 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; cycloid scales on lateral side of posterior half of body; vertical line on cheek absent; scales between first dorsal-fin base and lateral line 4; pectoral-fin rays 15; and gill rakers 20-21. Acropoma leobergi is redescribed based on 60 specimens (38.6-143.5 mm SL) from Taiwan, Philippines, and northern and west coast of Australia. Additionally, two specimens (94.9-103.1 mm SL) of A. boholensis collected from Luzon, Philippines, represent the first record of this species from the South China Sea.