140 



H.W. PALM 



12 



Fig. 12 Nybelinia sakanariae sp. nov. Scolex from Xiphiurus capensis. 

 Scale bar=150 |im. 



Fig. 13 N. sakanariae sp. nov. from X. capensis Homeomorphous basal 

 and metabasal armature. Scale bar=20 urn. 



atrium ventro-submarginal, in anterior third of the segment; genital 

 pores alternate irregularly. Cirrus sac elongate and slender, in final 

 segments 55-90 x 1200-1330 in size, directed anteromedially, 

 parallel to anterior end of the proglottids; sac thin-walled; cirrus 

 unarmed and coiled within sac. Other internal structures not seen. 



Remarks. The present specimen belongs to subgroup IAa of 

 Palm etal.{\ 997) and resembles, with a rose-thorn-shaped basal and 

 metabasal tentacular armature, N. anthicosum, N. palliata, N. 

 strongyla, N. riseri, N. sphyrnae and N. thyrsites. A comparison with 

 the type material of A 7 , anthicosum and N. palliata, deposited at the 

 U.S. National Parasite Collection, Beltsville, revealed differences in 

 oncotaxy. N. strongyla has a much larger TW=55 and SL=2300 and 

 larger hooks, and N. riseri has smaller hooks together with a larger 

 TW and a different scolex form (Dollfus, 1960). N. sphyrnae and A 7 . 

 thyrsites also differ in hook and scolex form/size (see Beveridge & 

 Campbell, 1996). Thus, the present specimen represents a new 

 species, Nybelinia schmidti sp. nov. 



Etymology. 

 D. Schmidt. 



The new species is named after the parasitologist G. 



8. Nybelinia scoliodoni (Vijayalakshmi, Vijayalakshmi & 

 Gangadharam, 1996) comb. nov. (Tentacularia scoliodoni) 



(Figs 16-17) 



Material examined. BMNH 1976. 1 1 .5.42^13, R. van der Elst 

 leg., 1 adult from the gut of Carcharhinus limbatus, South Africa. 

 Additional material: NHMV 2111, A.E. Shipley leg., 1 adult from 

 Glyphis gangeticus (-Carcharhinus gangeticus), India. 



DESCRIPTION (Fig. 16-17). Measurements: SL=667; SW=320; 

 pbo=267; pv=227; pb=144; vel=267; BL=133 (125-144); BW=59 

 (56-64); BR=2.2:1; SP= 1.9: 1.6:1. The tentacles are 173-200 long 

 and a basal tentacle swelling is absent. The TW varies along the 

 tentacle; at the most proximal part of the basal armature, TW=14- 

 17; at the basal armature, TW=23-25; at the apical armature, 

 TW=12-13. The tentacle sheaths are straight (TSW= 18-21), 

 prebulbar organs and muscular rings around the basal part of the 

 tentacle sheaths are absent. The retractor muscles originate in the 

 basal part of the bulbs. 



The metabasal armature is homeoacanthous, homeomorphous, 



