Abstract
Ochroconis bacilliformis, O. phaeophora and O. robusta, three novel species of the melanized genus Ochroconis (Sympoventuriaceae, Venturiales), are described, illustrated and distinguished phenotypically and molecularly from previously described species in the genus Ochroconis. Their potential significance for infection of cold-blooded vertebrates is discussed.
Highlights
The genus Ochroconis, typified by O. constricta, was morphologically segregated from a genus with lobed conidia, Scolecobasidium by de Hoog & von Arx [1], for melanized fungi with sympodial conidiogenesis and septate, ellipsoidal conidia which were liberated rhexolytically
Machouart et al [2] elucidated the general phylogenetic position of the genus by investigating highly conserved genes and found that Ochroconis and its relatives belonged to the order Venturiales, family Sympoventuriaceae
Phylogenetic analyses of partial coding genes, actin (ACT1), b-tubulin (BT2) and translation elongation factor 1-a (TEF1) were difficult to apply due to high degrees of variability which interfered with alignment over the entire genus
Summary
The genus Ochroconis, typified by O. constricta, was morphologically segregated from a genus with lobed conidia, Scolecobasidium by de Hoog & von Arx [1], for melanized fungi with sympodial conidiogenesis and septate, ellipsoidal conidia which were liberated rhexolytically. Machouart et al [2] elucidated the general phylogenetic position of the genus by investigating highly conserved genes (nuSSU, nuLSU, mtSSU and RPB2) and found that Ochroconis and its relatives belonged to the order Venturiales, family Sympoventuriaceae. Samerpitak et al [3] studied species diversity by analyzing more variable genes in addition to the partial ribosomal operon, i.e., the partial coding genes, actin (ACT1), b-tubulin (BT2) and translation elongation factor 1-a (TEF1) and recognized thirteen species in Ochroconis. K. Samerpitak Department of Microbiology, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand. G. S. de Hoog Research Center for Medical Mycology, Peking University Health Science Center, Beijing, China
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