Epigonus angustifrons

description

Measurements (% SL); counts are given in Table 1. Head length 29.8 – 30.5; head width 15.4 – 16.9; head height 15.6 – 18.5; body depth 18.2 – 19.1; body width 13.3 – 16.1; caudal-peduncle depth 8.5 – 9.9; caudal-peduncle length 25.0 – 27.7; orbital diameter 10.4 – 11.5; interorbital width 7.4 – 8.0; postorbital length 12.8 – 13.4; upper-jaw length 13.2 – 14.2; lower-jaw length 15.2 – 16.3; snout length 7.0 – 7.9; pre-first dorsal-fin length 35.3 – 37.3; presecond dorsal-fin length 56.8 – 60.9; pre-pectoral-fin length 31.1 – 32.0; pre-pelvic-fin length 32.3 – 33.1; pre-anus length 60.3 – 61.7; pre-anal-fin length 62.5 – 68.1; first spine length on first dorsal fin 4.9 – 5.1; second spine length on first dorsal fin 10.6 – 13.7; third spine length on first dorsal fin 14.0; second dorsal-fin spine length 4.9 – 6.0; first anal-fin spine length 2.1 – 2.6; second anal-fin spine length 10.0 – 10.5; pelvic-fin spine length 9.3 – 10.6; first dorsalfin base length 11.2 – 12.2; second dorsal-fin base length 10.0 – 10.8; anal-fin base length 9.1 – 10.3; pectoral-fin length 13.4 – 16.3; pelvic-fin length 14.1 – 17.0. TABLE]. Meristic counts anđ selecteđ characters for Western Inđian Ocean Epigon

A review of the deepwater cardinalfish genus Epigonus (Perciformes: Epigonidae) of the Western Indian Ocean, with description of two new species

diagnosis

Diagnosis. Dorsal-fin rays VII-I-I, 10 – 11; pectoral-fin rays 1 9 – 21; total gill rakers 33 – 36; vertebrae 10 + 15; pyloric caeca 21 – 24; pored lateral-line scales 47 – 50 + 3 – 5; scales below lateral line 11; opercular spine absent; maxillary mustache-like processes absent; ribs on last abdominal vertebra present; oral cavity black; body depth 18.2 – 19.1 % SL.

A review of the deepwater cardinalfish genus Epigonus (Perciformes: Epigonidae) of the Western Indian Ocean, with description of two new species

distribution

Distribution. Western South Indian Ocean (Abramov & Manilo, 1987; Okamoto, 2016 b) and southeastern Atlantic (Okamoto, 2016 b). Comparisons and Remarks. This species (Fig. 4) is similar to E. macrops and E. telescopus by having an isolated dorsal-fin spine between first and second dorsal fins, but differs from it in having 33 – 36 gill rakers (vs. 18 – 20 in E. macrops and 23 – 26 in E. telescopus). Abramov & Manilo (1987) reported that E. angustifrons has small teeth on the tongue, but they misidentified the minute papillae as teeth (Okamoto, 2016 b). Epigonus trunovi Parin & Prokofiev in Parin, et al., 2012 is a junior synonym of the present species (Okamoto & Aungtonya, 2013; Okamoto, 2016 b).

A review of the deepwater cardinalfish genus Epigonus (Perciformes: Epigonidae) of the Western Indian Ocean, with description of two new species

materials_examined

Material examined. CSIRO H 5799 - 02, 316.1 mm SL, 39 ° 01 S, 46 ° 01 E, western South Indian Ocean, 600 – 820 m depth, 5 June 2000; FSKU-P 20015, 2 specimens, 191 – 216 mm SL, 38 ° 29 S, 46 ° 42 E, western South Indian Ocean, 20 June 2010; SAIAB 193851, 133.5 mm SL, 41 ° 25.34 S, 42 ° 55.48 E, western South Indian Ocean, 802 – 1033 m depth, 2 December 2009.

A review of the deepwater cardinalfish genus Epigonus (Perciformes: Epigonidae) of the Western Indian Ocean, with description of two new species