Epigonus elongatus Parin & Abramov, 1986

Okamoto, Makoto & Gon, Ofer, 2018, A review of the deepwater cardinalfish genus Epigonus (Perciformes: Epigonidae) of the Western Indian Ocean, with description of two new species, Zootaxa 4382 (2), pp. 261-291 : 272-273

publication ID

https://doi.org/ 10.11646/zootaxa.4382.2.3

publication LSID

lsid:zoobank.org:pub:8E248E6F-FDA5-4829-9DD7-4CC0EFDB08B6

DOI

https://doi.org/10.5281/zenodo.5998241

persistent identifier

https://treatment.plazi.org/id/03A2BF38-6E66-4065-FF18-5FF0121E9D2E

treatment provided by

Plazi

scientific name

Epigonus elongatus Parin & Abramov, 1986
status

 

Epigonus elongatus Parin & Abramov, 1986 View in CoL

(New English name: Elongate Deepwater Cardinalfish) ( Figs. 2 View FIGURE 2 , 9 View FIGURE 9 ; Tables 1, 2)

Epigonus elongatus Parin & Abramov, 1986a: 55 View in CoL , fig. 2 (original description; type locality: 11°00 S, 50°42 E, off Saya de Malha Bank, Western Indian Ocean, 320 m depth; holotype: ZIN 47138); Shcherbachev, 1987: 42 (list, western Indian Ocean); Abramov, 1992: 98 (key); Okamoto & Motomura, 2013: 309, fig. 9c (key and photograph).

Material examined. ZIN 47138, holotype, 160.0 mm SL, 11°00 S, 50°42 E, off Saya de Malha Bank , Western Indian Ocean, 320 m depth, 9 April 1983 ; ZIN 47139, 2 specimens, paratypes, 140.0–149.0 mm SL, same data as holotype (photographs and radiographs).

Diagnosis. Dorsal-fin rays VII-I, 10; pectoral-fin rays 18–20; total gill rakers 22–23; vertebrae 10 + 15; pyloric caeca 7–9; pored lateral-line scales 48–50; opercular spine absent; maxillary mustache-like processes absent; nublike structures or spine on symphysis of lower jaw absent; ribs on last abdominal vertebra absent; tongue toothless; orbital diameter 12.1–13.6% SL; lower-jaw length 13.4–15.1% SL; body depth 16.4–18.2% SL.

Measurements (% SL); counts are given in Table 1. Head length 31.4–32.9; head height 15.7–18.9; body depth 16.4–18.2; body width 13.6–16.1; caudal-peduncle depth 8.2–9.4; caudal-peduncle length 27.3–30.0; orbital diameter 12.1–13.6; interorbital width 9.1–10.5; postorbital length 10.0–11.9; upper-jaw length 11.4–12.8; lowerjaw length 13.4–15.1; snout length 6.9–9.4; pre-first dorsal-fin length 36.2–39.1; pre-second dorsal-fin length 57.8–61.8; pre-pectoral-fin length 31.4–35.7; pre-pelvic-fin length 33.6–35.6; pre-anal-fin length 65.0–67.8; first spine length on first dorsal fin 3.1–6.4; second spine length on first dorsal fin 4.7–6.5; second dorsal-fin spine length 8.2–10.3; second anal-fin spine length 4.7–5.7; pelvic-fin spine length 8.0–9.4; first dorsal-fin base length 10.0–11.2; second dorsal-fin base length 9.1–10.0; anal-fin base length 8.6–9.4; pectoral-fin length 12.7–15.7; pelvic-fin length 10.1–12.1.

Distribution. Off Saya de Malha Bank, Western Indian Ocean (Parin & Abramov 1986a), at 320 m depth ( Fig. 2 View FIGURE 2 ).

Comparisons and Remarks. Epigonus elongatus is a member of the E. pandinonis group ( Okamoto & Motomura 2013). E. elongatus differs from the remaining 11 species of the genus in the Western Indian Ocean in having fewer gill rakers (22–23 vs. 26–36 in the others) and lacking ribs on the last abdominal vertebra. No additional specimens of E. elongatus have come to light since the original description in 1986 ( Fig. 9 View FIGURE 9 ).

ZIN

Russian Academy of Sciences, Zoological Institute, Zoological Museum

Kingdom

Animalia

Phylum

Chordata

Class

Actinopterygii

Order

Perciformes

Family

Epigonidae

Genus

Epigonus

Loc

Epigonus elongatus Parin & Abramov, 1986

Okamoto, Makoto & Gon, Ofer 2018
2018
Loc

Epigonus elongatus

Parin & Abramov 1986: 55
1986
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