New and interesting records of Trentepohlia (Trentepohliales, Chlorophyta) from French Guiana, including the description of two new species

Four species of the genus Trentepohlia were collected from French Guiana, including two new to science. Trentepohlia chapmanii sp. nov. formed orange coatings on bamboo reeds and consisted of a thick and compact, pseudoparenchymatous prostrate part on which numerous thin and unbranched erect axes were borne. Trentepohlia infestans sp. nov. produced dark red discolorations on many concrete walls and consisted of crustose masses formed by globular or elliptical cells, from which numerous cylindrical erect axes, supporting sporangiate laterals, arose. Regeneration of sporangiate laterals on the same erect axes was frequently observed. Trentepohlia dusenii, a little-known species, was collected from a metal surface in a forest environment and characterized morphologically. Sporangiate laterals were first observed in this species, and the collection from French Guiana represented its first record for the Americas. Trentepohlia diffracta var. colorata was collected from tree bark in rain forest, representing the second record since the original description from Queensland.