IWAMOTO & MCCOSKER: DEEP-WATER FISHES OF THE PHILIPPINE EXPEDITION289 
Platycephalidae (Flatheads) 
Rogadius welanderi (Schultz, 1966)? (Fig. 103a-b) 
Material.— CAS 235511 (87.6 mm SL, DC-1517); HEPD-028, beam trawl in 115-124 m. 
Remarks.— The HEPD specimen follows Knapp’s (1999:2414) description fairly well, except for a few 
minor items. The right P has 23 rays (c/22-23 recorded by Knapp); preopcrcle spine 1 (vs. 2 or 3); a rel¬ 
atively large antrose preopercle spine (r?5. small spine); and fm pigmentation patterns of D, P, A and D dif¬ 
fer. The maximum size of 13 cm TL reported is not much larger than the 11 cm TL of the HEPD speci¬ 
men, so size may not be a factor in the pigmentation differences. The species has been recorded from the 
American Samoas, Marehall Islands, Moluccas, and west into the Indian Ocean; it is not known from the 
Philippines, so the identification of this specimen remains tentative. 
Thysanophrys chiltonae (Schultz, 1966) (Fig. 104a-b) 
Material.— CAS 235508 (94.0 mm SL, DC-1507); HEPD-026, beam trawl in 82-86 m. 
Remarks. — The single juvenile collected during the expedition appeared to lack iris lappets. According to 
Knapp (1999), the species has “lappets bearing short branches with bifurcate tips.” Otherwise, tlie HEPD 
specimen agrees well witli his description. Widely distributed in the Indo-West Pacific. 
Hoplichthyidae (Ghost Flatheads) 
Hoplichthys langsdorfi Cuvier in Cuvier and Valenciennes, 1829 (Fig. 105) 
Material.— CAS 235513 (136 mm SL) and CAS 235800 (1, 123 mm SL, DC-1466); HEPD-021, beam 
trawl in 132-172 m. CAS 235525 (2, 105-147 mm SL): HEPD-022, otter trawl in 115-144 m. 
Remarks. — Previously recorded from southern Japan to the East China Sea and Taiwan (see Shao 2013); the 
HEPD specimens extend the range to the west coast of Luzon Is, Philippines. 
PSYCHROLUTIDAE (FATHEAD SCULPINS) 
Psychwlutes cf- occidentalis Fricke, 1990 (Fig. 106) 
Material.— CAS 234016 (137 mm SL, DC-1342); HEPD-011, otter trawl in 636-664 m. 
Remarks.— The absence of vomerine teeth, no cirri on head or body, D 22, P 23, and dark but not jet-black 
peritoneum agrees with those diagnostic characters for Psychmlutes occidentalis as given by Nelson (p. 
2428 in Carpenter and Niem, 1999). However, the color pattern does not entirely agree with Fricke’s (1990) 
original description. Fresh coloration of the HEPD specimen showed an overall unifoiTnIy brownish-giay 
color with blackish posterior part of body, black caudal tin, possibly pale caudal peduncle (but this may be 
an artifact of preseiwation with the skin shipped away), black pectoral fin but paler neai' base, with those 
fins lacking whitish margins, the eyes were not yellowish, and the belly was not whitish but grayish. 
Fricke’s drawing of the holotype shows traces of d iagonal bars on the body, which are lacking in our spec¬ 
imen. The known distribution of P. occidentalis is the Rowley Shoals off the northwestern coast of Aus¬ 
tralia. No member of the genus has hitherto been recorded from the Phihppines. 
Dactylopteridae (Flying Gurnards) 
Dactyloptena orientalis (Cuvier, 1829) (Fig. 107) 
Material.— CAS 235790 (101 mm SL, DC-1482); HEPD-022, otter trawl in 115-144 m. CAS 235470 
(39.4 mm SL); HEPD-026, beam trawl in 82-86 m. 
Remarks. — A widespread Indo-Pacific species known from Africa to Hawaii, Society Islands, Pitcairn and 
Rapa, and Japan to Austrafia. 
Dactyloptena tiltoni Eschmeyer, 1997 (Fig. 108) 
Material.— CAS 235885 (86.5 mm SL, DC-1498); HEPD-022, otter trawl in 115-144 m. CAS 235469 (72 
mm SL); HEPD-028, beam trawl in 115-124 m. 
Remarks.— A distinctive species of the family; so far known only from the Philippines. 
