A NEW TREMATODE OF THE GENUS UROTREMA FROM 



BATS 



By Joseph E. Alicata 



Junior Zoologist, Zoological Divdsion, Bureau of Animal Industry, Urdted 



States Department of Agriculture 



A trematode that appears to be a new species is described in this 

 paper. This fluke belongs to the family Urotrematidae Poche, 1926, 

 and to the genus TJrotrema Braun, 1900. Three specimens were col- 

 lected by the writer in June, 1931, from the intestine of a red bat 

 {Lasiurus horealis) captured in Washington, D. C. 



UROTREMA LASIURENSIS, new species 

 FlQUKB 1 



Specific diagnosis. — Urotrema: Body elongated, 3 mm to 3.5 mm 

 long by 890}i to 967)m wide in middle region of body, flattened dorso- 

 ventrally ; anterior end attenuated and posterior end bluntly rounded. 

 Cuticular spines present on anterior two-thirds of body and absent 

 on posterior third of body. Oral sucker subterminal, 124/t* to 156/i 

 long by 140yu, to 156/i wide. Prepharynx apparently absent ; pharynx 

 78/x to 93/i, long by 68/a to 76/ii wide; esophagus 91/* to lOQjx long; 

 intestinal ceca sinuous in outline, terminating 358/i to 390ju, from pos- 

 terior end of body. Acetabulum 156ft long by 156|U, to 162/* wide, 

 situated 234jti to 312jti from posterior margin of oral sucker. Testes 

 subspherical to oval, tandem or slightly oblique, and situated in 

 posterior half of the body. Anterior testis 296/x to 374/a long and 452/* 

 to 483/i wide, and posterior testis 343/* to 405/* long and 468/* to 561/* 

 wide; testes approximated or separated by a space of 15/*. Cirrus 

 pouch 327/* to 358/* long by 171/* wide, somewhat spindle-shaped, 

 directed slightly oblique to left of long axis of body and situated 

 at posterior end of body. Cirrus pouch contains a large seminal 

 vesicle and a relatively short, slender, unarmed cirrus. Genital pore 

 subterminal and ventral, situated at base of cirrus pouch. Ovary 

 transversely ovoid, 187/i to 234/* long by 249/* to 280/* wide, situated 

 in median line 31/* to 124/* caudad of acetabulum. Shell gland well 

 defined, caudad to and left of ovary. Receptaculum seminis well 

 developed and situated slightly to left of median line caudad of 



No. 2928.-PROCEEDINGS U. S. NATIONAL MUSEUM. VOL. 81, ART. 5 

 107709—32 1 



