Review of records of hymenolepidids (Eucestoda: Hymenolepididae) from dormice (Rodentia: Gliridae) in Europe, with a redescription of Armadolepis spasskyi Tenora & Baruš, 1958 and the description of A. genovi n. sp.

Armadolepis (Armadolepis) spasskyi Tenora & Barus, 1958 is redescribed on the basis of the type-series consisting of the holotype from the garden dormouse Eliomys quercinus (Linnaeus) (type-host) and a paratype from the forest dormouse Dryomys nitedula (Pallas); the occurrence of this species in the fat dormouse Glis glis (Linnaeus) cannot be confirmed due to the lack of specimens from this host species both in the type-series and other studied samples. The main corrections in the diagnostic characters of A. spasskyi are related to the number and length of the rostellar hooks (12 hooks, 12–14 µm long versus 16–19 hooks, 15.3–17.1 µm long in the original description) and the position of the testes in triangle (versus in line as originally described). Specimens originally identified as Hymenolepis myoxi (Rudolphi, 1819) by Genov (1984) from the fat dormouse G. glis from Bulgaria are described as Armadolepis (Bremserilepis) genovi n. sp. The new species differs from the congeners by the presence of a rudimentary rostellum and rudimentary rostellar hooks; the new species differs from the other two species of the subgenus, A. (B.) myoxi and A. (B.) longisoma, by its longer cirrus-sac (196–240 µm), scolex diameter of 180–300 µm (wider than that of A. myoxi and narrower than that of A. longisoma) and wider ovary (220–310 µm). Cestodes previously reported as Hymenolepis myoxi from E. quercinus from Switzerland and France (western and north-western Alps) are now identified as Armadolepis (A.) jeanbaeri Makarikov, 2017. Cestodes from G. glis from Switzerland and Slovakia, previously identified as Hymenolepis sulcata (von Linstow, 1879), are now identified as Armadolepis (B.) myoxi (sensu stricto). The position of Hymenolepis (s.l.) sciurina Cholodkovsky, 1913 as a subspecies of A. myoxi is rejected and it is considered a species inquirenda.