Abstract
A new species of dragonet, Callionymus madangensis from Madang, Papua New Guinea, is described on the
basis of a single male specimen collected with a trawl in about 30–40 m depth near Madang. The new species is
characterised within the subgenus Pseudocalliurichthys by a small branchial opening; head short (3.7 in SL); eye
large (2.3 in head length); preopercular spine with a short, straight main tip, six to seven curved serrae on its dorsal
margin and a strong antrorse spine at its base, ventral margin smooth, slightly concave; first dorsal fin much higher
than second dorsal fin, with 4 spines, first spine with a long filament (male); second dorsal-fin distally straight,
with 8 unbranched rays (last divided at base); anal fin with 7 unbranched rays (last divided at base); 17 pectoralfin
rays; caudal fin elongate, distally rounded, nearly symmetrical in male (upper rays not much shorter than lower
rays); sides of head, membrane connecting pelvic fin pectoral fin, and body with small ocelli; first dorsal fin plain
dark grey; second dorsal fin translucent, rays spotted; anal fin dark grey; lower margin of caudal fin dark grey,
remainder with vertical rows of brown spots. The new species is compared with similar species. Revised keys to
callionymid fish species of New Guinea, as well as of the subgenus Pseudocalliurichthys, are presented.
Key words: fishes, taxonomy, systematics, identification keys.
Abstract
A new species of dragonet, Callionymus madangensis from Madang, Papua New Guinea, is described on the
basis of a single male specimen collected with a trawl in about 30–40 m depth near Madang. The new species is
characterised within the subgenus Pseudocalliurichthys by a small branchial opening; head short (3.7 in SL); eye
large (2.3 in head length); preopercular spine with a short, straight main tip, six to seven curved serrae on its dorsal
margin and a strong antrorse spine at its base, ventral margin smooth, slightly concave; first dorsal fin much higher
than second dorsal fin, with 4 spines, first spine with a long filament (male); second dorsal-fin distally straight,
with 8 unbranched rays (last divided at base); anal fin with 7 unbranched rays (last divided at base); 17 pectoralfin
rays; caudal fin elongate, distally rounded, nearly symmetrical in male (upper rays not much shorter than lower
rays); sides of head, membrane connecting pelvic fin pectoral fin, and body with small ocelli; first dorsal fin plain
dark grey; second dorsal fin translucent, rays spotted; anal fin dark grey; lower margin of caudal fin dark grey,
remainder with vertical rows of brown spots. The new species is compared with similar species. Revised keys to
callionymid fish species of New Guinea, as well as of the subgenus Pseudocalliurichthys, are presented.
Key words: fishes, taxonomy, systematics, identification keys.
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