MINCARONE & MCCOSKER: REDESCRIPTION OF EPTATRETUSLUZONICUS 
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ventral Enfold (VFF) (holotype not measurable) 
(7.1-10.7); body depth excluding VFF (holotype 
not measurable) (6.7-9.4); body depth at cloaca 6.7 
(5.9-8.2); tail depth 8.1 (8.4-9.8). 
A 3-cusp multicusp on the anterior (outer) sets 
and a 2-cusp multicusp on the posterior (inner) sets 
of cusps; 9-11 unicusps on the anterior and 9-10 
unicusps on the posterior sets of cusps; total cusps 
47-51. Cusps slender and pointed (Fig. 2). A single 
palatine tooth in the roof of the mouth. A row of 
slime pores segmentally arranged on each side of 
body. Slime-pore counts (left + right sides of holo¬ 
type, followed by ranges for non-type specimens in 
parentheses): prebranchial pores 15 + 15 (13-14); 
branchial pores 7 + 8 (7-8); tmnk pores 49 + 50 
(49-55); tail pores 13 + 13 (12-14); total pores 84 
+ 86 (84-88). 
Eight pairs of gill pouches and gill apertures in 
the holotype and most non-type specimens; one 
specimen with 7 gill pouches and apertures on the 
right side and another specimen with 9 gill pouch¬ 
es and apertures on the left side of the body. One 
specimen with 8 gill apertures plus the pharyngocutaneous duct (PCD) aperture on the left side. 
Each gill pouch connected to its own gill aperture by the efferent branchial duct. Last branchial 
duct usually confluent with PCD, forming a large aperture on the left side of the body. Posterior tip 
of dental muscle reaches the fourth or fifth pair of gill pouches. Ventral aorta branches at the level 
of eighth gill pouch; all afferent branchial arteries connected to the branched portion of ventral 
aorta on both sides. 
Body color (Fig. 3) dark chocolate brown; tip of barbels whitish; conspicuous white eyespots; 
mouth and gill apertures with whitish margins; ventral finfold and caudal Enfold the same color as 
body. Body color slightly lighter in preserved specimens. 
DiSTRrouTiON. — Known only from the Philippines (Fig. 4). The holotype was collected at 
Figure 2. Dentition (anterior and posterior left 
series and palatine tooth) of Eptatretus luzonicus; CAS 
233675, 563 mm TL. Seale = 2 mm. 
Figure 3. Fresh speeimen of Eptatretus luzonicus', NPM 1999, 490 mm TL (443 mm after preservation). 
