Myxomycetes, state of Ceara, northeastern Brazil

Abstract

Thirty four genera and 215 species of Myxomycetes are present in northeastern Brazil, covering83 % of families, all subclasses and orders recognized for these microorganisms. Ceará, with an area of148,825,602 km2, is one of the least explored of the nine states in this region of the country, with records of 27species, distributed across 13 genera, occurring in a humid forest environment of the southern mesoregion.The dominant vegetation type is the Caatinga (dry, tree-shrub deciduous vegetation), with patches of Cerrado(savanna-like vegetation), Carrasco (montane deciduous shrub vegetation) and fragments of Pluvio-nebularTropical Subperennial Forest and Pluvial Tropical Subdeciduous Forest. In order to better document thediversity of myxomycetes in that state, specimens were collected from the field between 2002-2007 in Ceará’snorthern and northwestern mesoregions. The specimens obtained were deposited at the UFP Herbarium.Eighteen species were recorded, occurring in the Caatinga vegetation and the records of Comatricha, Crateriumand Metatrichia increase the number of genera which comprise Ceará’s myxobiota to 16. Arcyria denudata,Craterium leucocephalum, Badhamia panicea, B. melanospora, Didymium intermedium, Metatrichia vesparia,Physarum rigidum and P. tenerum are new records for Ceará, increasing the number of species known to occurin the state to 37.