RESUMO
In a study on soil microfungi from different countries two new hyphomycetes were found. The first one, Ramophialophora humicola, isolated from a soil sample collected in Ronda (Spain), is characterized by producing profusely branched conidiophores ending in sterile, sometimes swollen apices, and subhyaline, dacryoid conidia borne from both integrated and discrete phialides with conspicuous collaretes. ITS sequence data reveal its relationships with members of the Sordariales and its genetic differences with other fungi morphologically close, such as Cladorrhinum spp. The second species, Fibulochlamys chilensis, isolated from a soil sample collected in LaJunta (Chile), is characterized by micronematous, clamped, mostly branched conidiophores producing thallic, one-celled, thick-walled conidia that exhibit strongly wrinkled surfaces in age. The analysis of partial sequences of the ITS region and 28S rRNA gene reveal that this fungus is close to members of the gilled Agaricales.
Assuntos
Agaricales/classificação , Microbiologia do Solo , Sordariales/classificação , Agaricales/genética , Agaricales/isolamento & purificação , Agaricales/fisiologia , Chile , DNA Fúngico/análise , DNA Espaçador Ribossômico/análise , Genes de RNAr , Técnicas de Tipagem Micológica , Filogenia , RNA Ribossômico 28S/genética , Análise de Sequência de DNA , Sordariales/genética , Sordariales/isolamento & purificação , Sordariales/fisiologia , Espanha , Especificidade da Espécie , Esporos Fúngicos/genética , Esporos Fúngicos/fisiologiaRESUMO
Two new ascomycetes, Boerlagiomyces costaricensis (Pleosporales) and Scopinella musciformis (Sordariales sensu lato), from litter samples collected in rainforests of Costa Rica, are described and illustrated. Boerlagiomyces costaricensis has globose, ostiolate ascomata covered by numerous setae-like hairs; cylindrical, fissitunicate asci without apical structures; and large, fusiform, muriform, hyaline to pale brown ascospores. Scopinella musciformis is characterized by ostiolate ascomata with a few compact clusters of hypha-like hairs distributed on the peridial surface and a long neck; ovate to ellipsoidal unitunicate asci; and small quadrangular ascospores with diagonal germ slits.
Assuntos
Ascomicetos/classificação , Folhas de Planta/microbiologia , Árvores/microbiologia , Animais , Ascomicetos/citologia , Ascomicetos/genética , Costa Rica , DNA Fúngico/genética , DNA Ribossômico/genética , Esporos Fúngicos/citologiaRESUMO
Apiosordaria hispanica sp. nov. and Apiosordaria globosa sp. nov. isolated from soil samples collected in Tarragona, Catalonia, Spain, are described and illustrated. Both species are morphologically close to A. otanii. The ascospores of A. hispanica have tuberculate walls, while those of A. otanii have small warts. Apiosordaria globosa differs from those species by the globose upper cell of the ascospores, which has a small apical protrusion with sub-apical germ pore when young. In A. hispanica and A. globosa the lower cells of the ascospores are slightly warted, while in A. otanii the lower cell of the ascospores is smooth-walled.
RESUMO
Poroconiochaeta tetraspora sp. nov., isolated from soil of Russia, is described and illustrated. The new taxon differs from P. discoidea in its four-spored asci (eight-spored in P. discoidea) and from P. punctulata in the pattern of ascospore ornamentation, which is conspicuously pitted in P. tetraspora (punctulate in the other species). The new combination Poroconiochaeta savoryi is proposed and discussed.
RESUMO
Syspastospora tropicalis sp. nov. isolated from soil samples from different tropical regions is described and illustrated. The fungus can be easily separated from the other species of the genus by its setose perithecial ascomata with a short papillate neck.