Euclichthys (Fahay & Markle, 1984)

Last, Peter R. & Pogonoski, John J., 2020, Revision of the fish family Euclichthyidae (Pisces: Gadiformes) with the description of two new species from the Western Pacific, Zootaxa 4758 (2), pp. 231-256 : 253

Key to the adults of Euclichthys species (based on material exceeding 124 mm SL)

1 First dorsal fin short, length of longest first dorsal-fin ray 11–12% SL, 1.8–2.1 times in body depth; snout relatively long, horizontal length 4.8–5.6% SL; eye diameter 1.1–1.2 times interorbital width; fewer than 20 (17–19) primary rakers on the outer gill arch; total caudal-fin rays fewer than 36 (30–35).......... Euclichthys microdorsalis sp. nov. (northeastern Australia)

- First dorsal fin tall, length of longest first dorsal-fin ray 13–16% SL, 1.0–1.4 times in body depth; snout relatively short, horizontal length usually 3.5–4.5% SL; eye diameter 1.3–1.6 times interorbital width; 20 or more primary rakers on the outer gill arch; total caudal-fin rays exceeding 36 (37–45)............................................................ 2

2 Eye relatively large, horizontal diameter 6.1–7.2% SL; longest first dorsal-fin ray 2.6–3.4 times interorbital width; anal-fin base relatively short, length 50–53% SL; scales large, ~9 along base of first dorsal fin, ~ 20 in transverse line from anal-fin base posteriorly to dorsal margin of body; 23–25 primary rakers on the outer gill arch; ratio otolith length to height <1.7................................................... Euclichthys polynemus (southern and western Australia, New Zealand)

- Eye relatively small, horizontal diameter usually 5.2–5.9% SL; longest first dorsal-fin ray 3.6–4.2 times interorbital width; anal-fin base relatively long, length 53–57% SL; scales small, ~14 along base of first dorsal fin, ~ 25 in transverse line from anal-fin base posteriorly to dorsal margin of body; 20–22 primary rakers on the outer gill arch; ratio otolith length to height>1.8............................................ Euclichthys robertsi sp. nov. ( New Caledonia, eastern Australia)