1. Family Gyrodactylidae (Beneden and Hesse, 1863) 



Cobbold, 1864 



(Figs. 12, 32, E, 33, H, 43, 63, 131, 133, 134) 



Gyrodactylides Beneden and Hesse, 1863. 



The characteristics correspond to those of the suborder. 



Tjrpe genus; Gyrodactylus Nordmann, 1832. 



In addition to the type genus, Icancistrum Beauchamp, 1912; 

 Gyrodactyloides Bychowsky, 1947; and Paragyrodactylus Gvosdev, 1953 

 enter into the composition of the family. 



First of all one must note that we cannot agree with the inter- 

 pretation of English researchers concerning the author who first established 

 the present family. Price (Price, 1937b) indicates the family Gyrodactylidae 

 with the name "Gobbold" (sic ) and the year "1877. " With this in the text 

 he writes that "many authors including Johnston and Teigs (Johnston and 

 Teigs, 1922), Fuhrmann (Fuhrmann, 1928), Froissant (Froissant, 1930), 

 and Bychowsky, (Bychowsky, 1933c) relate the name of the family to van 

 Beneden and Hesse (van Beneden and Hesse, 1863), whereas the latter 

 authors gave the name "Gyrodactylides" and not "Gyrodactylidae"; the 

 first which gave the correct form of the name of the family \vas Cobbold 

 (Cobbold, 1877). " Sproston (Sproston, 1946) "corrects" the data of Price 

 and indicates that for the first time the name Gyrodactylidae was used by 

 Cobbold, not in 1877, but in the first edition of his book ("Entozoa: An 

 Introduction to the Study of Helminthology. . . ", 1864). It seems to us that 

 such an attitude toward the establishment of the name of the author of the 

 family is incorrect, forinally and actually, In the work of van Beneden 

 and Hesse it is clearly stated (van Beneden and Hesse, 1863, page 64 ) that 

 the name "Gyrodactylides" is attached to a special family of trematodes 

 and consequently these authors must be considered the first to establish 

 the name of this family. All the supplementary changes in the spelling of p. 399 

 the name of this group w^ithout the changing of its rank should not in any 

 way be considered as equivalent to authorship. Thus, Sproston correcting 

 Price in the appellation of the subfamily Trochopodinae, indicates Price 

 as its author and not herself (Price called this subfamily Trochopinae) 

 which in our opinion is completely correct. However, an impression is 

 formed that Anglo -Anne rican authors are sometimes excessively 

 punctilious formally. (This remark is not limited to this present case. ) 



Within the limits of the family there is one monotypic genus -- 

 Isancistrum, which is encountered on squids and is characterized by the 

 absence of middle hooks (Beauchamp, 1912). We can note in this connection 

 that the indication of the presence of 15 edge hooks in I. loliginis Beauchamp 

 is erroneous; there are undoubtedly 16 as among all Gyrodactylidae. 



477 



