Definition
Menegazzia asahinae is a species of foliose lichen belonging to the family Parmeliaceae and the genus Menegazzia.
Overview
Menegazzia is a genus of lichens characterised by perforated, leaf‑like thalli that are commonly referred to as “tree flutes.” M. asahinae is one of the less‑commonly recorded species within the genus. Published records indicate that it occurs in East Asia, with documented collections from Japan. Further occurrences outside this region have not been widely reported in the primary lichenological literature.
Etymology / Origin
The specific epithet asahinae honors the Japanese lichenologist Yasuhiko Asahina (1881–1975), who made significant contributions to the taxonomy and chemistry of lichens. The name follows the standard Latinised form for dedication to a person.
Characteristics
- Thallus: Foliose, loosely attached to the substrate, with a surface that typically displays a series of circular or irregular perforations (the hallmark of Menegazzia species).
- Upper surface: Usually gray‑green to pale brown, often bearing a thin, whitish pruina.
- Lower surface: Typically blackened with a dense network of rhizines for attachment.
- Reproductive structures: Apothecia, when present, are lecanorine with a pale disc and a margin similar in colour to the thallus. Conidia and soredia have not been extensively described for this species.
- Chemical constituents: Standard chemical spot tests (K, C, P) and thin‑layer chromatography have identified the presence of typical Menegazzia secondary metabolites such as usnic acid; however, detailed chemoprofiles specific to M. asahinae are not extensively documented.
- Ecology: Grows on bark (corticolous) of trees in temperate forest zones, favouring humid microhabitats.
Accurate information regarding the full geographic range, detailed morphological measurements, and comprehensive chemical profile is not confirmed.
Related Topics
- Menegazzia – the genus encompassing perforated foliose lichens.
- Lichenology – the scientific study of lichens.
- Parmeliaceae – a large family of lichens that includes many foliose and fruticose forms.
- Yasuhiko Asahina – Japanese lichenologist after whom the species is named.
- Foliose lichens – lichens with leaf‑like thalli that are loosely attached to their substrate.