Dr. Éva Murai szerk.: Miscellanea Zoologica Hungarica 1. 1982 (Budapest, 1982)

Murai, É.: Taeniid species in Hungary (Cestoda: Taeniidae). II. Larval stages of taeniids parasitizing rodents and lagomorphs

Characterization of Cladothyridium globifera C

. globifera larvae are not uncommon in Apodemus- species, where they are usually situated at the edges of the hepatic lobes in strong-walled opaque cysts arranged bead-like around the liver (Fig. 5). One host cyst usually contains more than one larva (maximum noted: 11). The oval or globular host-cysts vary in diameter from 0.5 to 0.8 mm. The cysticercus-type larvae 0.5 to 0.7 mm length usually containe inverted - or protruded - scoleces with a diameter ranging from 0.2 to 0.3 mm. The same measurements for the rostellum is 0.09 mm, for the suckers 0.08 mm. The rostellum is arranged in two rows of 39-49 characteristically shaped hooks (Figs. 24-26). The smaller of these hooks varv in length from 0.022 to 0.027 mm, the larger from 0.034 to 0.037 mm. Adult specimens of the species were found in Buteo buteo (Linnaeus, 1758), B

. lagopus (Pontoppidan. 1763), Circus aeruginosus (Linnaeus, 1758) and C. macrourus (Gmelin, 1771) hosts in the Bakony Mountains and in the Hortobágy National Park (MURAI & TENORA, 1973, MURAI et al., in press). Note

. MARKOWSKI (1928) observed 1-3 larvae in host-cysts of a Cladotaenia species. FREEMAN (1959) summarized the data for the genus available till that time and keyed the species on the base of a number of characters. ABULADZE (1964) considered the larval form to be of diagnostic importance for differentiating taeniid species and name it Cladothyridium. It must be noted that in those Cladotaenia host-cysts which contained more than one larva, the larvae were situated besides one another, lying freely. Multiscolex form, or the formation of daughter bladder was not observed. 9. Cladotaenia circi Yamaguti, 1935 Name of larva: Cladothyridium circi (Yamaguti, 1935) Abuladze, 1964. Intermediate hosts: Clethrionomys glareolus, Microtus arvalis

. - Localization: on the liver and the pulmonal surface. - Extensity: 0.18% in C. glareolus, 0.04% in M

. arvalis. - Intensity: 5 to 50 host-cysts. Collection data of the infested intermediate hosts: Clethrionomys glareolus - County Vas: Őriszentpéter 20/06/67 = 1 case. Microtus arvalis - County Vas: Bük 26/06/74 = 1 case. Characterization of Cladothyridium circi During the course of examining small rodents, only two cases of larval infestation were found where the occurrence of C. circi could be ascertained on the basis of the shape and size of the hooks. Few cysts were found In the liver of a Clethrionomys glareolus and a massive infection was found in a Microtus arvalis

. where not only the liver, but also the lungs contained large number of cladothyridia. The cysts were situated mainly at the edges of the lobes of the liver and the lungs. The diameter of the oval cysts ranged from 0.8 to 1.0 mm, the larvae were freely placed in the translucent cysts with strong walls (pergament-like membrane of connective tissue). The length of the cysticercus-type larvae vary from 0.6x0.4 mm to 0.6x0.5 mm. The larvae usually have invaginated but sometimes also everted scoleces, often 2-3 larvae in a hostcyst. Diameter of the scolex is 0.3 mm, that of the rostellum 0.08 to 0.10 mm, Bame for the suckers is 0.07 mm. The rostellum is arranged in two rows, with 47 to 52 hooks of different sizes and shapes. The smaller hooks vary in length from 0.018 to 0.020 mm, the larger ones vary from 0.023 to 0.026 mm. The shape of the hooks is unmistakebly different from those of the T. tenuicollis

. which are similar in size (see photographs on Figs 27-29). Adult specimens of the species were collected from Falco peregrinus Tunstall, 1777 in the Hortobágy National Park (MURAI et al., in press).