PIETSCH and SEIGEL: CERATIOID ANGLERFISHES OF THE PHILIPPINE ARCHIPELAGO 



Oneirodes flagellifer was previously known 

 from only three specimens, all collected from the 

 Indo-West Pacific region: the holotypes of O. 

 flagellifer and O. thysanophorus (= O. flagellifer) 

 collected by the Dana in 1929, and an additional 

 specimen collected by the Galathea in 1951 

 (Pietsch 1974a, fig. 110). The Alpha Helix has 

 added six additional females from the Sulu Sea 

 that compare very well with the previously re- 

 corded material (Table 1). 



Oneirodes melanocauda Bertelsen 1951 



Oneirodes melanocauda is known from five lar- 

 val specimens (easily separated from other 

 Oneirodes larvae by the presence of pigment on 

 the tips of the caudal fin rays, Pietsch 1974a) three 

 of which were collected by the Dana in southeast 

 Asian waters. No additional material was pro- 

 vided by the Southeast Asian Bioluminescence 

 Expedition. 



Oneirodes plagtonema n. sp. , Figures 5, 6; Table 2 



Material. — A single female, the holotype, LACM 

 36114-2, 25 mm SL, stn 66. 



Diagnosis. — A species of Oneirodes differing from 

 all previously described species in escal morphol- 

 ogy: anterior appendage narrow, elongate, and 

 directed anteroventrally; medial appendages 

 absent; posterior appendage minute; a pair of 

 filamentous, branched, anterolateral appendages. 



Description. — Escal appendage pattern B (Pietsch 

 1974a, fig. 60B); esca with anterior appendage 

 narrow and elongate, with a single, short, distal 

 filament, directed anteroventrally; medial ap- 

 pendages absent; terminal papilla unusually 

 large, rounded, with a distal pigment spot; pos- 

 terior appendage minute; a filamentous, branched, 

 anterolateral appendage on each side (Figure 5). 



Suboperculum short, upper end rounded with- 

 out indentation on posterior margin (Figure 6); 

 length of lower fork of operculum 24.0% of SL; 

 ratio of lengths of upper and lower forks of oper- 

 culum 0.53. 



Epibranchial teeth absent; teeth present on 

 pharyngobranchial II. 



Counts and measurements in Table 2. 



Etymology. — The name plagionema is derived 

 from the Greek plagios, meaning oblique, and 

 nema, thread, alluding to the oblique, anteroven- 

 trally directed anterior escal appendage. 



Figure 5. — Esca of Oneirodes plagionema n.sp., holotype, 

 LACM 36114-2, 25 mm SL, left lateral view. 



FIGURE 6. — Opercular bones of Oneirodes plagionema n.sp., 

 holotype, LACM 36114-2, 25 mm SL, right lateral view. 



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