TENTACULARIID TRYPANORHYNCHS FROM THE NHM 



139 



Fig. 8 N. tingualis from T. pleurogramma. Homeomorphou.s metabasal 



armature. Scale bar=10 urn. 

 Fig. 9 N. lingualis from T. pleurogramma. Homeomorphous apical 



armature. Scale bar=10 urn. 



for the type material but the same kind of tentacular armature. The 

 size should be considered as a case of intraspecific morphological 

 variability within the species. 



Etymology. The new species is named after J.A. Sakanari, in 

 honour to her work on the life cycle of trypanorhynch cestodes. 



7. Nybelinia schmidti sp. nov. 



(Figs 14-15) 



Material examined. Holotype BMNH 1982.12.3.1, G. Ross 

 leg., 23.07.1978, 1 adult from the stomach of Isurus glaucus, Algoa 

 Bay, South Africa. 



DESCRIPTION (Figs 14-15). Measurements: SL=1172; SW=832; 

 pbo=794; pv=473; pb=289; ppb= 46; vel=373; BL=289; BW=104 

 (94-117); BR=2.8:1; SP=2.7:2.6:1. The tentacles are long and 

 slender; TW=1 8.4-23.5; and a basal swelling is absent. The tentacle 

 sheaths are spirally coiled; TSW=46-51. Prebulbar organs and 

 muscular rings around the basal part of the tentacle sheaths are 

 absent. The retractor muscles originate at the basal part of the bulbs. 



The tentacular armature is homeoacanthous, homeomorphous, 

 and a characteristic basal armature is absent. The massive and rose- 

 thorn shaped hooks increase in size towards the metabasal part of the 

 tentacle, L=13.5-15.0; B=l 1.7-13.3 (metabasal) and L=9.0-10.3; 

 B=8. 3-9.0 (basal); the hooks in the metabasal part of the tentacle are 

 slightly more slender than in the basal part; hsr=5-6. 



The strobilar is acraspedote, with about 240 very large segments, 

 wider than long. The proglottids in the anterior part of strobila are 

 140-155 long x 1400-1540 wide, the final proglottids enlarge in 

 size towards 450-560 x 2800-3080. In mature proglottids, genital 



Fig. 10 Nybelinia riseri. Scolex from Trachyurus felicipes. Scale 

 bar=100 |jm. 



Fig. 11 N. riseri. Homeomorphous basal armature consisting of rounded 

 hooks without anterior extension of the basal plate. Scale bar=15 \xm. 



