RESUMO
The anamorphic fungus Synchaetomella lunatospora gen. et sp. nov. is described from a culture isolated from leaf litter in Singapore. The genus is characterized by the production of synnematous conidiomata with brown stipes, phialidic conidiogenesis with terminal and acropleurogenous conidiogenous cells, and falcate, 1-septate conidia, aggregating in white, mucilaginous heads. Its phylogenetic relationships, inferred from the partial nuclear small ribosomal subunit (18S) sequence, are with the coelomycetous genera Sphaerographium, Chaetomella, and Hainesia. However, the order and family affinities of this group are unclear.
Assuntos
Ascomicetos/classificação , Ascomicetos/isolamento & purificação , Folhas de Planta/microbiologia , Ascomicetos/citologia , Ascomicetos/genética , Sudeste Asiático , DNA Fúngico/química , DNA Fúngico/genética , DNA Ribossômico/química , DNA Ribossômico/genética , Hifas/citologia , Dados de Sequência Molecular , Filogenia , RNA Ribossômico 18S/genética , Análise de Sequência de DNA , Esporos Fúngicos/citologiaRESUMO
Cyphellophora guyanensis sp. nov., isolated from leaf litter in French Guyana, is described and illustrated. This fungus is characterized by ampulliform to flask-shaped phialides, with a conspicuous, funnel-shaped collarette, and nearly straight to falcate or slightly sigmoid, (2-)3-6 septate conidia. Cyphellophora guyanensis is compared to the other Cyphellophora species, and the latter genus is compared to Kumbhamaya and Pseudomicrodochium. Kumbhamaya indica, P. fusarioides, and P. suttonii are transferred to Cyphellophora. The phylogenetic relationships of Cyphellophora with other genera of ascomycetes and related mitosporic fungi were inferred from the analysis of the partial nuclear ribosomal DNA SSU sequences data. The analysis supports a placement of Cyphellophora in Chaetothyriales, and probably in the Herpotrichiellaceae
Assuntos
Ascomicetos , Ascomicetos/classificação , Ascomicetos/citologia , Ascomicetos/genética , Ascomicetos/isolamento & purificação , DNA Fúngico/química , DNA Fúngico/genética , DNA Fúngico/isolamento & purificação , DNA Ribossômico/química , DNA Ribossômico/genética , DNA Ribossômico/isolamento & purificação , Fungos Mitospóricos/classificação , Dados de Sequência Molecular , Filogenia , Análise de Sequência de DNA , Homologia de Sequência do Ácido NucleicoRESUMO
Phialomyces fusiformis sp. nov., isolated from soil in Singapore, is described and illustrated. The species is similar to P. macrosporus-type species of the genus but differs in that it has longer, more ellipsoid-limoniform, fusiform and more coarsely ornamented conidia.
