Odontanthias randalli

description

Description. Dorsal rays X, 16 (16 – 17); anal rays III, 7; all dorsal and anal soft rays branched, the last to bases; pectoral rays 15 (15 – 16), all except uppermost branched; pelvic rays I, 5, all soft rays branched; principal caudal rays 15 (14 in one paratype), middle 13 (12 in one paratype) branched; upper procurrent caudal rays 7 (6 – 8), posteriormost 3 segmented; 7 (6 – 7) lower procurrent caudal rays, posteriormost 3 segmented; lateral-line scales 37 – 39; scales above lateral line to origin of dorsal fin 5; full-size scales above lateral line to base of middle dorsal spines 1; scales below lateral line to origin of anal fin 18 (17 - 19); circumpeduncular scales 18 (18 – 19); gill rakers 12 + 24 (10 – 13 + 21 – 27), total 32 – 39; vertebrae 10 + 16; supraneural (predorsal) bones 2. Body moderately deep, depth 2.3 (2.2 – 2.5) in SL; body compressed, width 2.5 (2.2 – 2.5) in body depth; head length 2.63 (2.63 – 2.84) in SL; eye large, orbit diameter 3.17 (3.11 – 3.65) in head length; snout short, 4.99 (4.53 – 5.16) in head length; interorbital region convex, least width 3.80 (3.40 – 3.95) in head length; caudal-peduncle depth 2.79 (2.61 – 2.89) in head length; caudal-pedunc

Odontanthias randalli n. sp., a new anthiine fish (Serranidae: Anthiinae) from Indonesia

diagnosis

Diagnosis. Dorsal rays X, 16 – 17; anal rays III, 7; pectoral rays 15 – 16; lateral-line scales 37 – 39; gill rakers 10 – 13 + 21 – 27 (total = 32 – 39); body depth 2.2 – 2.5 in SL; spine at angle of preopercle moderately long, extending about half distance to margin of subopercle; vomerine tooth patch arrowhead-shaped; no teeth on mesopterygoids; scales dorsally on snout nearly reaching upper lip; 3 rd dorsal spine elongate, 1.36 – 2.32 in head length; 3 rd ray of dorsal fin the longest, greatly produced as a long filament; 2 nd anal spine subequal to third, 2.32 – 2.78 in head length; caudal fin lunate, the lobes very long and filamentous, fin length 1.37 – 2.01 in SL. Colour when fresh mostly pink; scales on upper half of body each with a bright yellow spot; head pinkish with a vivid yellow, horizontal V-shaped marking originating on snout tip and extending posteriorly as two stripes; lower stripe running posteroventrally below eye to edge of opercle; upper stripe running posterodorsally through about the middle of eye to edge of the opercle just above primary opercular spine; nape yellowish; four pale pinkish blotches present below dorsal fin base; dorsal fin mostly yellow with

Odontanthias randalli n. sp., a new anthiine fish (Serranidae: Anthiinae) from Indonesia

distribution

Distribution. Currently known only from East Lombok in the Nusa Tenggara region of Indonesia. All type specimens were collected from the fish market at Tanjung Luar from handline fishers operating in local waters.

Odontanthias randalli n. sp., a new anthiine fish (Serranidae: Anthiinae) from Indonesia

etymology

Etymology. Named after John E. Randall, who has made such a significant contribution to the knowledge of anthiine fishes, and Indo – Pacific fishes in general. The review of the Odontanthias genus he co-authored provided detailed description of the nominal species and their relationships with closely related genera. Proposed vernacular name: Lombok Swallowtail Comparisons. Odontanthias randalli can be separated from the other 13 nominal species of this genus by a combination of coloration, morphology and meristics. Odontanthias randalli is distinguishable from O. rhodopeplus, O. grahami, O. dorsomaculatus, O. unimaculatus, O. elizabethae and O. caudicinctus in having 16 – 17 dorsal soft rays (vs. 12 – 14). It can be separated from O. chrysostictus and O. katayamai in having very long caudal fin lobes (vs. short, rounded caudal fin lobes) and the third dorsal spine longer than other spines (vs. subequal in length). It differs from O. fuscipinnis, O. flagris, O. tapui and O. wassi in having very long, filamentous caudal-fin lobes (vs. short or long, broadly rounded or paddlelike caudal lobes). Odontanthias randalli also differs from O. tapui in having the third dorsal spine longer th

Odontanthias randalli n. sp., a new anthiine fish (Serranidae: Anthiinae) from Indonesia