Arcyria leiocarpa is a synonym of Hemitrichia leiocarpa and can be easily confused with Arcyria cinerea which is distinguished by ornamentation capilitium examination.
Why suggested for a Global Red List Assessment?
Hemitrichia leiocarpa is found in Brazil only in Atlantic Forest, which has its biodiversity threatened. Also, during a century of collections, only 03 records were found in the last 51 years.
Hemitrichia leiocarpa is known in 27 countries. In Brazil it is known in Pernambuco and Alagoas. There are 10 occurrences on GBIF for Pernambuco, but they actually represent 10 records of only one sample, which is preserved in BPI herbarium (Bezerra et al., 2009, Cavalcanti, 2010), and 02 records for Alagoas (unpublished records).
Population and Trends
Brazil has three occurrences of Hemitrichia leiocarpa, one in Pernambuco in 1968 and two in Alagoas in 2019. Hemitrichia leiocarpa is considered a rare species (Martin & Alexopoulos, 1969, Stephenson, 2011).
Population Trend: Uncertain
Habitat and Ecology
The species can be found in herbivore dung, mosses, wood and dead leaves.
Subtropical/Tropical Moist Lowland Forest
Hemitrichia leiocarpa in Brazil is collected in the Atlantic Forest domain, which has been losing its biological diversity resulting in species extinction.
Housing & urban areasCommercial & industrial areasShifting agricultureAgro-industry farmingSmall-holder plantationsAgro-industry plantationsRoads & railroadsIntentional use (species being assessed is the target)Intentional use (species being assessed is the target)Intentional use: subsistence/small scale (species being assessed is the target) [harvest]Intentional use: large scale (species being assessed is the target) [harvest]Increase in fire frequency/intensityAcid rainHabitat shifting & alterationDroughtsTemperature extremesStorms & flooding