[in Russian with English abstract: ] The amphibious freshwater lichen Verrucaria madida previously known only from a few scattered, predominantly oceanic localities in Europe, is reported for the first time for Asia and Russia on the basis of morphological, anatomical and molecular data. The species was found on the Crylion Peninsula in southern Sakhalin Island, growing on periodically submerged siliceous rocks in a forest stream. A detailed description of the Russian material is provided, confirming its identity by the unique character of (3)4(5)-spored asci, a green subgelatinous thallus with a characteristic green cortical pigment, prominent perithecia and small ellipsoid ascospores. The characteristics of pycnidia and conidia missing in the protologue are given for the first time. A key morphological finding supporting the phylogenetic relationship with Wahlenbergiella is the first documented presence of filiform conidia in Verrucaria madida, a trait it shares with Wahlenbergiella tavaresiae. The discovery extends the known range of this rare species eastward by over 7000 km and represents a significant range extension from its European localities. Keywords: Wahlenbergiella, aquatic lichens, biogeography, disjunctive distribution, lichenized fungi, new record, py­renocarpous lichens, range extension, Crylion Peninsula, East Asia.