Phagoaata ■Qemalis Kenk, 1944 



Synonym: Fpntiaola vermalis: Ball, 1969. 



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32 



ij 



Fig. 32 after Kenk (1944). 



Length up to 12 mm, width 1.5 mm. Head truncate, somewhat variable in 

 shape during locomotion. Lateral edges of frontal margin rounded, behind 

 them a very slight narrowing of the lateral margins (neck). Dorsal side 

 gray, often with brownish hue, sometimes with darker longitudinal streaks; 

 ventral surface lighter. Pigment is lacking in the ocular spaces and at 

 the oral and genital apertures. Pigmentation may be almost absent in very 

 young specimens and in animals ready for asexual reproduction. Eyes two, 

 farther removed from the frontal than from the lateral margins. Cannot 

 be distinguished from several other species by external characters. Rare- 

 ly found sexually mature. Testes few, ventral, prepharyngeal , in part 

 longitudinally fused. Penis with rather small bulb and elongated, conical 

 papilla. Vasa deferentia enter bulb and unite to form a rather narrow 

 longitudinal canal, the ejaculatory duct, opening at the tip of the 

 papilla. No seminal vesicle is developed. Copulatory bursa U-shaped, 

 narrow in the midline, the two horns extending anteroventrally and ending 

 below the intestine. Oviducts unite in the space between the male atrium 

 and the bursal duct and open into the atrium anterior to the mouth of the 

 bursal duct. Reproduction is principally asexual, by fragmentation fol- 

 lowed by encystment. Found usually in temporary ponds in winter and early 

 spring. Distributed chiefly in the Mid-West (Michigan, Ontario, probably 

 Illinois and Indiana) and Tennessee. Principal literature: Kenk (1944). 



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