Phagooata woodworthi Hyman, 1957a 



Synonyms: Planaria gracilis: Girard, 1850 (not Haldeman, 1840); Phago- 

 oata gracilis: Girard, 1850 (and other authors before 1937); Euplanaria 

 gracilis: Hyman, 1931 (in part); Phagooata gracilis woodworthi Hyman, 

 1951; Fontioola gracilis woodworthi: Ball, 1969. 



50 



51 



0.5 mm 



bd ode sph 



b vd mp pi od gp 



Fig. 51 after Kenk (1970c). 



Adult specimens 15-30 mm long and 2t^4.5 mm wide. Head truncate, frontal 

 margin assuming a straight, convex, or concave shape during locomotion. 

 Lateral edges of the head rounded, very little protruding laterally. 

 Dorsal side dark gray, brown, or almost black, ventral side lighter. 

 Eyes normally two, situated at a distance of about 1/3 the head width. 

 Pharynges multiple. Cannot be distinguished externally from 

 P. gracilis. Testes numerous, mainly ventral (but also dorsal) to the 

 intestine. Vasa deferentia behind the spermiductal vesicles approach 

 the penis bulb directly without forming a backward loop. Penis with 

 feebly muscular bulb and a stout, short, usually truncate papilla. The 

 outer musculature of the papilla consists of a thick layer of inter- 

 mingled circular and longitudinal fibers very characteristic for the 

 species. Sperm ducts enter bulb anterodorsally or anterolateral ly, 

 unite in the bulb and open into the wide penial lumen which is not 

 differentiated into seminal vesicle and ejaculatory duct. The very 

 wide bursal canal is displaced to the right of the midline. It is 

 coated, in the anterior part, by the usual two layers of muscle fibers, 

 circular and longitudinal. As it approaches the atrium near the gono- 

 pore, its muscular envelope becomes very thick and consists of inter- 

 mingled longitudinal and circular fibers. Reproduction probably only 

 sexual. Northeastern parts of the U. S. north of the Delaware River 

 and eastern Canada as far west as Ontario. Principal literature: 

 Woodworth (1891, misidentified as P. gracilis), Hyman (1937a), Kenk 

 (1970c). 



44 



