THREE NEW TREMATODES FROM THE GALAPAGOS 



MARINE IGUANA 

 AMBLYRHYNCHUS CRIST ATUS* 



(With Two Plates) 



Paul T. Gilbert 

 University of Nebraska 



The trematodes described below were collected during the Allan 

 Hancock Expedition to the Galapagos Islands in 1934, by Dr. H. W. 

 Manter under whose direction this study was made. 



Three species of trematodes were secured from the marine iguana, 

 Amblyrhynchus cristatus (Bell). All three species seem to represent 

 new genera of Pronocephalidae. Two of the new genera are in the 

 subfamily Pronocephalinae, and one in the subfamily Teloporinae. 



At present the family Pronocephalidae contains five subfamilies 

 and consists of monostomes chiefly from marine turtles. There are 

 thirteen species recorded from Chelone midas alone. Although no 

 Pronocephallds are hitherto known from Lacertilia, it is not sur- 

 prising that the trematodes of Amblyrhynchus should belong to this 

 family since the food and habitat of this iguana are so much like 

 those of marine turtles. This iguana lives along a rocky coast line 

 and feeds upon seaweed. 



The type specimens of the three new species described are de- 

 posited in the United States National Museum and paratypes are 

 in the collection of The University of Southern California. 



Family: PRONOCEPHALIDAE Looss, 1902 .^-; 



Subfamily: Pronocephalinae Looss, 1899 



Iguanacola navicularius, new genus, new species •^^■t 



(Plate 11, figs. 1-4) I -^ ^ 



Host: Amblyrhynchus cristatus ,-^ . 



Location: Intestine ^, 



Locality: Albemarle Island ^' \ 



The following description is based on a study of four mounted 

 and two sectioned specimens. Of the four toto mounts only two were 



* Studies from the Zoological Laboratories, University of Nebraska, No. 194. 



[91] 



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