Gadomus magnifilis Gilbert and Hubbs, 1920

Figure 2.

Gadomus magnifilis Gilbert and Hubbs, 1920:398–401, fig. 4 (holotype USNM 78208; n. Mindanao; Albatross sta. 5515 in about 700 fm [1280 m]; 2 paratypes, Philippines; 508–554 fm [929–1014 m]).— Howes and Crimmen, 1990:197 (descr. from type spec.).— Shao et al., 2008: table 2 (1 spec., SWT, first record for Taiwan) .

MATERIAL EXAMINED.— SWT: ASIZP 65627 (1, 70 HL, 385+ TL); CD 229, 880– 1062 m.

DISTINGUISHING FEATURES.— A species of Gadomus with chin barbel about 29–72% of HL; length elongated P ray 2–3 times HL; prolonged ray in 1D and V greater than 1.5 times HL; 1D II,9–10; P i17–i18; V 8; outer gill rakers bluntly tipped, lathlike, short, about half orbit diameter, (5–6)+(21–23); pyl. caeca 24–29; interorbital width 16–17% HL; orbit diameter 21–24%; suborbital depth 10–15%; upper jaw length 55–60%; chin barbel 29–72% (compiled from Gilbert and Hubbs 1920 and ASIZP 65627).

DISTRIBUTION.— Taiwan (SWT) to n. Mindanao, Philippines, in 929–1280 m.

REMARKS.— Our identification of the single Taiwan specimen is tentative. Its barbel length is somewhat shorter (29% HL cf. 61–72%) and suborbital somewhat deeper (15% HL cf. 10%) than in the type specimens of G. magnifilis . The Taiwan specimen appears similar to G. introniger in its gill-raker count, barbel length, orbit diameter, and bluntly tipped gill rakers, but differs in having a slightly narrower interorbital (17% cf. 20–23%), slightly deeper suborbital (15% cf. 10–13%), and longer orbit-to-preopercle distance (51% cf. 44–49%). The pyloric caeca could not be counted in our specimen because they had been previously extracted and were unavailable; they may have offered additional clues to the correct identity. Gilbert and Hubbs (1920:396) considered G. denticulatus as closely related to G. magnifilis, but compared to our specimen, G. denticulatus has a much narrower interorbital space (1.5–1.8 into orbit diameter cf. 1.3), slightly larger orbit (23–24% HL cf. 21% in our spec.), and slightly fewer gill rakers (4–6)+(17–22) (23–27 total), cf. 6+23 (29 total).