Acanthotrema alboisidiatum

The species grows up to a diameter of 5 cm (2 in) and bears short, white isidiate outgrowths that resemble insect eggs.

The holotype, the original specimen from which the description is derived, was discovered in Río Grande, Puerto Rico, on the trunk of a Dacryodes excelsa tree.

Its unique, white isidia, especially noticeable in their early stages of growth, are a standout feature that defines this taxon.

What stands out are the white isidia, short outgrowths on the lichen's surface that, especially when not fully matured, bear a resemblance to insect eggs.

[2] Tabonuco forests in Puerto Rico have a diverse lichen biota, with 76 corticolous species having been identified from this habitat.