Chromis weberi Fowler et Bean, 1928

Myoung, Se Hun, Myoung, Jung-Goo, Woo, Min-Su, Kim, Maeng Jin, Kang, Min Gu & Park, Joo Myun, 2023, New record of Chromis weberi (Actinopterygii: Ovalentaria: Pomacentridae) from Jeju Island, southern Korea, Acta Ichthyologica et Piscatoria 53, pp. 89-94 : 89

Chromis weberi Fowler et Bean, 1928

Note.

(Fig. 2 ) Body counts, measurements, and proportions of body parts expressed as the percentage of the standard length (SL) are shown in Table 1 .

Material examined.

KIOST 00001, 1 specimen, 31.6 mm SL, Munseom , Jeju Island, Korea (33°13′39.05″N, 126°33′48.79″E) .

Description.

Body deep and laterally compressed (Fig. 2 ); mouth small and terminal, with conical teeth in both jaws; single dorsal fin with deeply notched fin membrane originating vertically above pelvic fin; lateral line tubular and incomplete below dorsal soft rays. Head brown, and dorsal surface of head dark brown and iridescent under eyes and anterior tip (Fig. 2 ). Dorsal side of body dark brown; ventral side light brown. Posterior margins of preopercles and opercles black. Spiny rays and anterior soft rays of dorsal fin, anterior part of anal fins, and tips of upper and lower lobes of caudal fin black. Base of pelvic fins slightly black and becoming transparent toward tip. Posterior soft rays of dorsal fin and anal fin and central part of caudal fin transparent.

Genetics.

Analysis of the mt-COI gene sequence (345 bp) showed that the specimen differed from other Chromis species recorded in the region with a genetic distance values of 0.130-0.252 (Fig. 3 ).

Figures

Figure 2. Chromis weberi, fresh, 31.6 mm SL, off Munseom, Jeju Island, South Korea.

Figure 3. Neighbor-joining tree showing the relation between Chromis weberi (presently reported study; MF 409549) and other Chromis spp., with one outgroup (Sillago japonica) using mt-COI DNA sequences. Numbers at branches indicate bootstrap probabilities in 1000 bootstrap replications. Bar indicates a genetic distance of 0.02.