FLEMINGER and HULSEMANN: FOUR SIBLING SPECIES OF PONTELLINA 



Genital segment bearing anterolateral and 

 posterolateral clusters of hairs on both sides of 

 segment (Figure 3 a, e); anterior cluster larger, 

 best seen in dorsal view. Posterior cluster less 

 prominent, of similar or coarser hairs. A row of 

 relatively long, fine hairs encircling segment 

 near distal margin. 



Male 



In lateral view posterior corner of ThIV-V 

 somewhat angular, apex usually bearing one 

 minute denticle (Figure 4e-h). Chela of right 

 P5 with proximal segment extending disto- 

 laterad as a relatively slender digitiform pro- 

 cess opposing apex of distal falcate segment 

 (Figure 4i); base of distolateral digitiform 

 process flanked by small anterior process, 

 triangular in lateral view, and small angular 

 posterior process bearing a sensoriiform seta 

 (Figure 4j); in lateral view posterior basal 

 process and digitiform process with relatively 

 straight margins intersecting at an angle great- 

 er than 70° (Figure 4j); in posterior view two 

 basal processes overlapping, both extending 

 toward center of lumen of chela; additional 

 sensoriiform setae on proximal segment of 

 chela: one anteromedial near articulation with 

 distal segment; on distal segment: one proximo- 

 medial, one mediosubapical, and three lateral. 

 Left P5 (Figure 4i) with proximal segment of 

 Re (Rel) short relative to other three species 

 below. Length of right furcal ramus exceeds 

 left Rel by 1.55-1.85 times, 46 specimens (see 

 Figure 30). 



Additional Description 



Female 



Right furcal ramus fused to anal segment, 

 varying directly with prosome length, relatively 

 longer than that in Indian and Pacific congeners 

 described below (Figure 25); ratio of length to 

 width highest in genus, usually 1.5 times longer 

 than wide (median 1.56:1, range 1.28-1.74:1, 

 134 specimens), showing apparent overlap only 

 with the equatorial Atlantic congener (see 

 Figure 27); lateral margin of right furcal ramus 

 with small pointed projection somewhat vari- 

 able in shape and size just anterior to base of 

 outermost seta (Figure 3e, h). Glandlike tissue 

 within right furcal ramus with associated duct- 

 like structure extending toward lateral point. 



Left furcal ramus not fused and appreciably 

 longer than right ramus (see Figure 19). 



P5 (Figui-e 4a, c, d) with inner margin of Re 

 lacking hair. Ri polymorphic with one or two 

 apical spines fused to segment, spines on left 

 and right Ri may differ in number in same 

 specimen (Figure 4b, Table 7); Re 2 to 3 times 

 longer than Ri, median 2.37:1, range 1.97- 

 3.08:1, 59 specimens, differing strongly from 

 Indian and Pacific congeners (see Figure 29). 



Attached spermatophore observed on four 

 specimens (see Figure 33 a, b; Table 5), hanging 

 free from single place of attachment in vicinity 

 of genital pore, neck with small helical turn 

 near place of attachment and larger helical turn 

 at origin of sac. 



Male 



Right furcal ramus not fused to anal segment, 

 about equal in length to left ramus (see Figure 

 19), varying directly with prosome length (see 

 Figure 26); ratio of length to width relatively 

 high (median 2.30:1, range 2.0-2.53:1, 44 speci- 

 mens), but showing more overlap with congeners 

 than found among females (see Figure 28). 



Types 



Unknown, presumed to be lost. Reference 

 specimens from the Atlantic, Pacific, and Indian 

 Oceans have been deposited in the U.S. National 

 Museum, Smithsonian Institution. 



Reference Specimens 



4d. 49, Atlantis //-31-5, lat. 39°13.0'N, long. 

 63°26.5'W, 14 Jan. 1967, ¥4-m net, 

 oblique tow, maximum cable out 200 m. 



2c5, 29, Capricorn 31, lat. 06°31'N, long. 124° 

 41'W, 13 Feb. 1953, 1-m net, oblique 

 tow, maximum cable out 200 m. 



2(5,2 9, TRANSPAC 134A, lat. 23°26.3'N, 

 long. 161°49.6'W, 17 Nov. 1953, 1-m 

 net, oblique tow between surface and 

 129 m est. 



2 d, 4 9, Lusiad V-76, lat. 02°01'S, long. 91°58'E, 

 24 Apr. 1963, 1-m net, oblique tow, 

 maximum cable out 280 m. 



2d Lusiad V-104, lat. 03°01'S, long. 



52°58'E, 10 May 1963, 1-m net. oblique 

 tow, maximum cable out 280 m. 



73 



