Abstract
A review of the taxonomy of the genus Cladotaenia established that at least four species of this genus occur in Europe, Egypt, and Sudan; that four species occur in North America; and that there are 10 valid species in the world. C. circi Yamaguti, 1935 is redescribed from Circus cyaneus hudsonius and Accipiter cooperi, and C. globifera (Batsch, 1786) is redescribed from Accipiter gentilis atricapillus, A. striatus velox, Buteo p. platypterus, B. jamaicensis, and C. cyaneus hudsonius all collected in North America. The development of the plerocercoid of both species is described. Natural infections with the plerocercoid of C. circi, are reported from Peromyscus maniculatus sonoriensis, and with the plerocercoid of C. globifera in the rodents, Clethrionomys gapperi, Napaeozapus insignis, Peromyscus maniculatus gracilis, P. leucopus noveboracensis, Tamias striatus, Tamiasciurus hudsonicus, and the insectivore Sorex cinereus. The ratio of the length of the hook to length of guard of the large hooks of Cladolaenia is less than 3.5:1, whereas this ratio is more than 3.5:1 on the large rostellar hooks of Paruterina, which is considered a good criterion for distinguishing the plerocercoids of the two genera.
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