172 



ILLINOIS BIOLOGICAL MONOGILiPHS 



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ABOTHRIUM RUGOSUM (Batsch 1786) 

 [Figs. 32-36, 63, 76, 91, 109] 



Taenia dccimpollicaris 



Taenia tetragonoceps (part.) 



"Der rmizlichter Fischbandwtirm " 



Taettia rugosa 



Taenia tetragonoccps (part.) 



Taenia rugosa 



Taenia rugosa 



Rhytis conoccps 



Bothriocephalus rugosus 



Bothrioceophalns rugosus 



Bothriocephalus rugosus 



Bothriocephalus rugosus 



Bothriocephalus rugosus 



Dibothrium rugosum 



Bothriocephalus rugosus 



Dibothrium rugosum 



Bothriocephalus rugosus 



A bothrium gadi 



Abothrium gadi 



Bothriocephalus rugosus 



Bothriocephalus rugosus 



Dibothrium rugosum 



Abothrium rugosum 



Abothrium rugosum 



Bothriocephalus rugosus 



Bothriotaenia rugosa 



Bothriotaenia rugosa 



Bothriotaenia rugosa 



Bothriotaenia rugosa 



Abothrium- rugosum 



Boihriotaenia rugosa 



A bothrium rugosum 



Dibothrium rugosum 



Bothriotaenia rugosa 



Abothrium rugosum 



Specific diagnosis: With the characters of the genus. Large cestodes 

 with maximum length, breadth and thickness of 1000, 7 and 2mm., respectively. 

 Scolex present only in very yoimg strobilas, when conical and provided with 

 very weak bothria, changing with age to a pseudoscolex of various shapes, 

 usually imbedded in pyloric cecum of host. Proglottides at first broad and 

 very short, obscured by irregular transverse and longitudinal rugae, then 

 gradually lengthening with age until finally quadrate or longer than broad. '^ 



Cuticula 5^4 thick, subcuticula 0.14mm. Small calcareous bodies, 20/x in 

 length. Longitudinal muscles in bundles, transverse forming septa between 

 proglottides. Nerve strands 45/i in diameter. Two chief excretory vessels 

 anteriorly, passing into 30 to 35 posteriorly. 



Genital cloaca in"egularly alternating, between first and second thirds of 

 edges of proglottides. Vagina opens immediately behind the cirrus and 

 slightly ventral; no hermaphroditic duct. 



