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Fissurina aggregatula
Fissurina aggregatula is a lichen that forms a thin, crust-like growth on bark and belongs to the family Graphidaceae. It was first described from Fakahatchee Strand Preserve State Park in southwestern Florida. There, it forms small clusters of short lirellae (slit-like fruiting structures), and standard chemical tests (thin-layer chromatography) did not detect any lichen substances.
From the article Fissurina aggregatula on Wikipedia (CC BY-SA), quoted section by section
Description
The thallus forms a crust on bark, typically 1–3 cm (0.4–1.2 in) across and about 40–80 μm (micrometers) thick. The surface is uneven to distinctly roughened, often warty or blistered (bullate), and ranges from yellowish green to olive-brown. Its photobiont (the photosynthetic partner) is a trentepohlioid alga (Trentepohlia-type). The fruiting structures are fissurine lirellae, arranged in dense, small clusters. Individual lirellae are straight to curved, usually unbranched (sometimes sparsely branched), and about 0.3–0.7 mm long. In these lirellae, the disk (spore-producing surface) is concealed, and the lips (labia) are thick and yellowish white. Microscopically, the asci are fusiform (spindle-shaped) and usually contain eight ellipsoid ascospores. The ascospores are 3-septate (divided by three internal walls), about 14–20 × 7–9 μm, and non-amyloid. Chemical screening (thin-layer chromatography) did not detect any lichen substances.
Range & habitat
Fissurina aggregatula is known from a few collections in Fakahatchee Strand Preserve State Park (Collier County, Florida). It has been found on the bark of branches of unidentified hardwood trees, in second-growth habitat along trails within the preserve. The lichen has since been recorded from Sikkim, India, and Rondônia, Brazil.
== References ==
Wikipedia: “Habitat and distribution”
Where it lives
Recorded sightings
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geo-referenced records in GBIF, from museums, herbaria and field observers.
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In the stacks
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Every page naming Fissurina aggregatula in the Biodiversity Heritage Library →
This page is assembled live from iNaturalist, GBIF, Wikipedia, the Source Library and the Internet Archive. It is not yet part of the hand-edited codex. iNaturalist taxon 462917.