Spinyfin bigeye anthias

description

Description. Dorsal-fin rays IX, 12; 6 th dorsal-fin spine much reduced and immediately anterior to 7 th dorsalfin spine; anal-fin rays III, 8; all dorsal and anal-fin soft rays branched, the last to its base; pectoral-fin rays 13 – 14, all except uppermost branched; pelvic-fin with I spine and 5 branched rays; principal caudal-fin rays 17, the middle 15 branched; upper procurrent caudal rays 8, two posteriormost segmented; lower procurrent caudal rays 7, two posteriormost segmented; lateral-line scales 44; transverse scales above lateral line to dorsal-fin origin 8; two fullsize scales from lateral line to base of middle dorsal-fin spines; 18 scales below lateral line to origin of anal fin; circumpeduncular scales 21; gill rakers 10 + 20; vertebrae 10 + 15; supraneural (predorsal) bones 2. Body moderately deep, its depth 2.2 in SL; body compressed, the width 2.5 in body depth; head length 2.6 in SL; eye large, orbit diameter 3.2 in head length; snout short, 4.3 in head length; interorbital slightly convex, the least width 2.9 in head length; caudal-peduncle depth 2.6 in head length; caudal-peduncle length 2.2 in head length. Mouth large, the maxilla extending just posterior to a v

Giganthias serratospinosus, a new serranid (Perciformes: Serranidae: Anthiinae) from the island of Lombok in Indonesia

diagnosis

Diagnosis. Dorsal-fin rays IX, 12; anal-fin rays III, 8; pectoral-fin rays 13 – 14; lateral-line scales 44; gill rakers 30 (10 + 20); body depth 2.2 in SL; eye large, orbit diameter 3.2 in head length; no prominent spine at angle of preopercle; vomerine tooth patch very small, triangular with rounded edges; no teeth on endopterygoids; scales dorsally on head reaching to about level of mid-eye, head naked anteriorly; maxilla fully scaled; tips of first to fourth dorsal spines and pelvic spine expanded with coarse serrations; fourth dorsal spine longest, 3.5 in head length; longest dorsal-fin soft ray 2.3 in SL; third anal-fin spine longest, 2.3 in head length; caudal fin lunate, lobes not tapering, fin length 3.5 in SL; pectoral fins 1.4 in head length; pelvic fins reaching to level of anus, 4.3 in SL.

Giganthias serratospinosus, a new serranid (Perciformes: Serranidae: Anthiinae) from the island of Lombok in Indonesia

distribution

Distribution. Currently known only from East Lombok in the Nusa Tenggara region of Indonesia. The type specimen was collected from the fish market at Tanjung Luar (East Lombok) and caught by handline fishers operating in local waters. Thus, it was not translocated from other fishing areas like much of the landed catch.

Giganthias serratospinosus, a new serranid (Perciformes: Serranidae: Anthiinae) from the island of Lombok in Indonesia

etymology

Etymology. Named based on combination of the Latin serratus (serrate) and spina (spine) in allusion to the serrate tips to the anterior dorsal and pelvic spines which is a key diagnostic feature of this genus of anthiine fish. Comparison with other species. Following a detailed examination and comparison with the description of the similar-sized specimens of the type species, G. immaculatus, by Katayama (1954) it was apparent that this specimen represented a new species of Giganthias. The two type specimens of G. immaculatus described by Katayama (1954) were collected in 1952 off Japan. This species has also been recorded off Taiwan (Lee, 1990; Shen, 1993) as well as the Izu and Ryukyu Islands (Masuda et al., 1984; Nakabo, 2002). The illustrated specimen of G. immaculatus in Masuda et al. (1984, pl. 119 a) differs from the illustrated type specimen and the colour image in Lee (1990). The Masuda et al. (1984) specimen has a much lower anterior head profile, much shorter and higher soft dorsal and anal fins and a larger caudal fin. A more detailed examination of this specimen is needed to determine if it is conspecific with G. immaculatus. The new species recorded from off Lombok in

Giganthias serratospinosus, a new serranid (Perciformes: Serranidae: Anthiinae) from the island of Lombok in Indonesia