DAILEY and PERRIN: HELMINTH PARASITES OF PORPOISES 



Hjlocerciis delphi>ii Baylis and 

 Daubney, 1925 



This parasite has been reported previously 

 from the genus Stenella by Zam et al. (1971). 

 They found three of 17 S. plagiodoii (Cope, 

 1866) taken off the Florida coast infected with 

 H. (lelphiiii. This report represents a new 

 host record from S. gruff ma ni and S. loiigi- 

 rostris. Infections occurred in bunches with 

 the anterior ends of the parasites embedded 

 in capsules found outside of the bronchial walls 

 (Figure 1). The body of each parasite lies 

 in the bronchiole oriented in an anterior direc- 

 tion, never towards the apex of the lobe, similar 

 to the orientation described for SkrjabiiialiHs 

 cryptocephalus (see Delyamure, 1955). 



Miistigo>ienui stetielLie gen. et sp. n. 

 (Nematoda: Spiruridae) 



This nematode is described from three female 

 specimens taken from the forestomachs of two 

 S. graffmatii (both recovered prior to present 

 study) and one S. loiigirostris. 



Miistigoueiiui gen. n. (Ascaropsinae) 



Mouth with two unlobed lips. Cervical cuticle 

 not inflated or flanged. Buccal capsule cylin- 

 drical, with few connecting, annular, thicken- 

 ings. Esophagus long, not divided into anterior 

 and posterior portions; valve of typical spiru- 

 roid form. Females prodelphic, ovaries post- 

 esophageal. Vulva in middle third of body. 

 Cuticle transversely striated. Oviparous. Para- 

 sites of Cetacea. 



Miistigoneiuci steuelLie sp. n. (Figures 2-6) 



With characters of the genus: body whip- 

 shaped, with thin anterior and enlarged pos- 

 terior portions. Stoma triangular; two large 

 lips. Buccal capsule reinforced with connecting 

 rings, cervical papillae present, eggs with 

 enlarged cap. 



Female: 25.5 (23.5-28.5) long by 1.2 in 

 maximum width, 7.0 from posterior end. Buccal 

 capsule 0.054 long, tapering from 0.045 wide 

 at anterior to 0.032 at esophageal junction. 



Figure 1. — Halocercus delphini with anterior end em- 

 bedded in capsule. (X7) 



Nerve ring 0.281 from anterior end, surround- 

 ing esophagus. Esophagus 8.5-11.7 long, widen- 

 ing at approximately 2.59 from anterior end. 

 Ovaries directed anteriorly then reflexing 

 sharply. Vulva muscular, 16.64 from anterior, 

 vagina vera 0.13 long by 0.086 wide, vagina 

 uterina 0.81 long by 0.11 wide. Eggs 0.034 

 long by 0.032 wide, with swollen cap slightly 

 larger than bottom portion. Anal lip large, 

 anus 0.22 from posterior tip. Tail conical with 

 large mucron. 



Hosts: Stenella graffniaiii, S. loiigiroHtris. 



Location: Forestomach. 



Locality: Eastern tropical Pacific Ocean; 



holotype from S. loitgirostris collected 



at approximately lat 8°N, long 107° W. 

 Type specimens: USNM Helminth Collection 



holotype female No. 72159, paratype 



No. 72160. 



Remarks: A search of the literature indicates 

 this is the first report of a spirurid 



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