Hypocrea virens sp nov., the teleomorph of Trichoderma virens

The new species Hypocrea virens, has been found to be the teleomorph of Tri choderma virens, a species commonly used in biological control applications . This conclusion is based on the comparison of morphological and molecular data from four isolates of T. virens and a single collection and isolate o f H. virens. Data for several morphological characters, including colony an d growth characteristics, were collected. In addition, sequence data from I TS1, 5.8S, ITS2 rDNA and translation elongation factor (tef-1 alpha) were a nalyzed for the five isolates. Analysis of phenotypic characters show that cultures and microscopic characters of the anamorph of H. virens are indist inguishable from those of T. virens. This is consistent with sequence data from ITS1, 5.8S, ITS2 rDNA which show that the sequence of H. virens is ide ntical to that of the ex-type isolate of T virens. Despite minor variation in tef-1 alpha sequences, T. virens isolates and H. virens form a monophyle tic group that is different from other examined species of Hypocrea; this c lade is supported by a 100% bootstrap value. Molecular and morphological da ta confirm the connection between H. virens and T. virens.