Obama's Basslet

materials_examined

Holotype: BPBM 41315, 43.2 mm SL, male. Type locality: northwestern Hawaiian Islands, Kure Atoll, north side, 28.4918 ° N, 178.2879 ° W. Illustrations: Pyle et al., 2016, figs. 1 – 6. D: X, 17. A: III, 8. P: 14. C: 14 (branched). V: 26 (10 + 16). GR: 32 (10 + 22). LL: 33 or 34.

Annotated checklist of anthiadine fishes (Percoidei: Serranidae)

description

Description. Dorsal fin X, 17, last soft ray branched to base; anal fin III, 8, last soft ray branched to base; pectoral-fin rays 14; pelvic-fin rays I, 5; principal branched caudal rays 14, upper procurrent unbranched caudal rays 6, lower procurrent unbranched caudal rays 4; pored lateral-line scales 33 (34); scale rows above lateral line to origin of dorsal fin 3 (4); scale rows below lateral line to origin of anal fin 14 (13); gill rakers on upper limb 10, on lower limb 22; vertebrae 26 (10 + 16). Body ovoid, compressed, its greatest depth 2.88 (2.84) in SL, the width just posterior to gill opening 2.00 (2.50) in depth; head length 2.88 (2.96) in SL; snout short, its length 7.14 (6.40) in head; orbit diameter 2.88 (2.67) in head; interorbital convex, the least bony width 3.57 (3.43) in head; least depth of caudal peduncle 2.83 (2.59) in head. Mouth large, oblique and protractile; lower jaw not projecting beyond the upper when mouth closed; maxilla 2.08 (2.04) in head, expanded distally, reaching below posterior border of pupil, slightly diagonal, the gape forming an angle of about 20 ° to the horizontal, supramaxilla absent. A pair of nostrils on either side of head, close toget

Tosanoidesobama, a new basslet (Perciformes, Percoidei, Serranidae) from deep coral reefs in the Northwestern Hawaiian Islands

diagnosis

Diagnosis. A species of Tosanoides (sensu Katayama & Masuda, 1980) distinguished by the following combination of characters: fourth or fifth dorsal spine the longest, dorsal-fin soft rays 17; anal-fin soft rays 8; pored lateral-line scales 33 or 34; head 2.9 - 3.0 in SL; body depth 2.8 - 2.9 in SL; color in life pink or yellowish pink on head and body, slightly darker dorsally fading ventrally; snout and region immediately dorsal to eye bright yellow, with a thin bright yellow band extending dorsally on either side of nape; a thin bright yellow horizontal stripe extending horizontally from posterior middle edge of eye posteriorly across most of operculum, continuing as a series of irregular oblong spots on midline of body from just posterior to gill opening to a point approximately one-fourth to one-half of pectoral fin; a second thin bright yellow stripe extending posteriorly from lower jaw across maxilla just ventral to eye and continuing horizontally across operculum and base of pectoral fin; dorsal fin pink or yellowish pink with darker pink regions on membranes, and a bright magenta margin extending from tip of first dorsal fin posteriorly on anterior half of soft dorsal fin;

Tosanoidesobama, a new basslet (Perciformes, Percoidei, Serranidae) from deep coral reefs in the Northwestern Hawaiian Islands

discussion

Discussion. Tosanoides obama is another example of several new fish species that have been discovered on deep coral reefs over the past several decades, mostly involving the use of modern mixed-gas closed-circuit rebreather diving technology (Pyle 1996, 2000). In recent years there has been increased attention focused on mesophotic coral ecosystems (MCEs), coral-reef habitat at depths of approximately 30 - 150 m in tropical regions worldwide (Hinderstein et al. 2010, Baker et al. 2016). Many more new species of fishes and other reef-associated marine organisms are likely to be discovered as a result of continued exploratory work in this poorly documented environment. The fish subfamily Anthiinae (Anthiadides Poey, 1861, type genus Anthias Bloch, 1792, stem Anthi-), is a homonym of the beetle subfamily Anthiinae (Anthies Bonelli, 1813, type genus Anthia Weber, 1801, stem Anthi-). According to Article 55.3 of the International Code of Zoological Nomenclature (ICZN 1999), homonymous family-group names in current use based on similar (but not identical) genus-group names must be referred to the Commission for a ruling to remove homonymy. A case is currently in preparation to formally r

Tosanoidesobama, a new basslet (Perciformes, Percoidei, Serranidae) from deep coral reefs in the Northwestern Hawaiian Islands