Galapagos Species Database

The Galapagos Species Database shares the information about the species from our Natural History Collections.

Dyplolabia afzelii (Ach.) A. Massal.

liquen de escritura, Powdered script lichen

Dyplolabia afzelii Photo: Frank Bungartz, CDF, 2008.
Dyplolabia afzelii Photo: Frank Bungartz, CDF, 2008.

Thallus thin, inconspicuous, almost entirely embedded in the substrate, of the same color as the substrate or slightly darker, ochraceous, olive to deep brown; surface smooth, not pruinose; Apothecia prominent to sessile, lirellate; lirellae elongate, broad; labia black, but entirely covered by a thick, white, C+ red pruina (lecanoric acid); disc concealed, a thin slit; exciple laterally strongly carbonized, ±open below; hymenium hyaline, clear (not inspers), I–; ascospores hyaline, I–, 8 per ascus, short and broad, narrowly ellipsoid to broadly fusiform, 16-22 x 7-10 µm, transversely septate, 4-celled Chemistry: Apothecial pruina C+ red; lecanoric acid.

Some records in Weber (1986) are misidentifications of Helminthocarpon leprevostii, a species that is very common throughout the Galapagos dry lowlands, but one specimen collected by Pike (ID 37-18) is confirmed here as D. afzelii. This conspicuous species has since not been re-discovered and must be presumed extinct from the archipelago.

Taxonomy

Domain
Eukaryota

Kingdom
Fungi

Phylum
Ascomycota

Class
Lecanoromycetes

Order
Ostropales

Family
Graphidaceae

Genus
Dyplolabia

Species
afzelii

Taxon category: Accepted

Syn.: Graphis afzelii

Taxon origin: Native

Status

Critically endangered

Distribution

Distribution: A pantropical species; only few recent records from Floreana Island.

References

  • Weber, W.A. (1986) The Lichen Flora of the Galápagos Islands, Ecuador. Mycotaxon 27: 451-497.
  • Bungartz, F. Lücking, R. & Aptroot, A. (2009) The lichen family Graphidaceae (Ostropales, Lecanoromycetes) in the Galapagos Islands. Nova Hedwigia 90: 1-44.