Materials for the helminth fauna of fire-bellied toad Bombina bombina (Linnaeus, 1761) (Amphibia: Anura) in the Kaluga region

Data on helminths of a red-bellied toad of Bombina bombina (Linnaeus, 1761) from a flood plain of the Oka river (Kaluga region) are for the first time provided. In 2018 year of the full helminthological autopsy method investigated 37 specimen of amphibians. Six species of helminths from two taxonomic groups are registered: Trematoda (5) and Nematoda (1). Three species of trematodes (Diplodiscus subclavatus, Strigea strigis, mtc., Tylodelphys excavata, mtc.) are for the first time observed at amphibians of this region. Biohelminths (trematodes) dominate; nematodes are presented by the single species in adult stages of a group of geohelminths. The high contamination is noted by Tylodelphys excavata metacercaria stage. These circumstances are explained by features of biology, ecology and probably physiology of the host.