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

Abstract

A new species of the genus <i>Acropoma</i>, <i>A. arafurensis</i> 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. <i>Acropoma leobergi</i> 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 <i>A. boholensis</i> collected from Luzon, Philippines, represent the first record of this species from the South China Sea.