172 



ILLINOIS BIOLOGICAL MONOGRAPHS 



[460 



ABOTHRIUM RUGOSUM (Batsch 1786) 

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



1773 Taenia decimpoUicaris 



1781 Taenia tetragonoceps (part.) 



1782 " Der runzlichter Fischbandwunn " 

 1786 Taenia rugosa 

 1788 Taenia tetragonoceps (part.) 

 1790 Taenia rugosa 



1802 Taenia rugosa 



1803 Rhytis conoceps 

 1810 Boihriocephalus rugosus 

 1816 Bothrioceophalus rugosus 

 1819 Bothriocephalus rugosus 

 1819 Bothriocephalus rugosus 

 1845 Bothriocephalus rugosus 

 1850 Dibothrium rugosum 

 1853 Bothriocephalus rugosus 

 1863 Dibothrium rugosum 

 1867 Bothriocephalus rugosus 

 1871 Abothrium gadi 

 1881 Abothrium gadi 

 1889 Bothriocephalus rugosus 



1889 Bothriocephalus rugosus 



1890 Dibothrium rugosum 



1890 Abothrium rugosum 



1891 Abothrium rugosum 



1892 Bothriocephalus rugosus 

 1894 Bothriotaenia rugosa 

 1896 Bothriotaenia rugosa 

 1896 Bothriotaenia rugosa 



1898 Bothriotaenia rugosa 



1899 Abothrium rugosum 



1900 Boihriotaenia rugosa 



1900 Abothrium rugosum 



1901 Dibothrium rugosum 

 1903 Bothriotaenia rugosa 

 1910 Abothrium rugosum 



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

 with maximum length, breadth and thickness of 1(X)0, 7 and 2mm., respectively. 

 Scolex present only in very young 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/i thick, subcuticula 0.14mm. Small calcareous bodies, 20/i in 

 length. Longitudinal muscles in bimdles, transverse forming septa between 

 proglottides. Nerve strands 45^* in diameter. Two chief excretory vessels 

 anteriorly, passing into 30 to 35 posteriorly. 



Genital cloaca irregularly alternating, between first and second thirds of 

 edges of proglottides. Vagina opens immediately behind the cirrus and 

 slightly ventral; no hermaphroditic duct. 



