The Hidden Amphibians of the Voynich Manuscript: A Caecilian Reading of Folio 49r

This paper reframes recent zoological and ecological findings within the interpretive lens of the Voynich Manuscript (VM), treating the manuscript as a record of observed natural phenomena embedded in a medical–hydrological landscape. Building on the integrative taxonomic description of an unstriped Ichthyophis species in Yunnan China at the border of Vietnam (Poyarkov et al., 2025), this study examines the correspondence between caecilian morphology, water-dependent liana habitats, and visual motifs depicted in VM folio 49r. The dotted, annulated, limbless forms illustrated on this folio are analyzed not as symbolic serpents but as biologically accurate renderings of fossorial amphibians encountered in saturated riverine environments. By correlating VM imagery with species-level endemism, plant–soil associations, and the Red River (Yuanjiang–Hồng Hà) corridor, this paper argues that the manuscript encodes first-hand ecological observation consistent with Southeast Asian hydrological landscapes. The study further proposes that water-loving lianas functioned as surface indicators for subterranean amphibian presence, a relationship implicitly preserved in the manuscript’s visual description.