1887

Abstract

SUMMARY: Numerical analysis of the 41 species currently recognized in the genus indicated that only 23 clusters were sufficiently different, at less than 90% matching of 58 characters, to be classified as separate species. These species belonged to four main divisions of the genus, mutually related at 70 to 75% matching: group (twelve species), (seven species), group (three species) and By similar analysis of the genus , three groups were recognized; the first, of twelve species, was associated with , which, related at 70% to the four groups of , may be regarded as a fifth group of that genus. The second group of is a single species, , which is related to the group. The third group of , five former species related to , is closely related to The genera and overlap and it is proposed that they be regarded as a single genus, In the combined genus there are 34 species, assessed at 90% matching coefficient. A list of proposed synonyms is presented, with modified standard descriptions of those species in which the synonyms are merged.

The advantages of serological identification over a scheme based on fermentation and assimilation are discussed; yeast isolates may be allocated rapidly to one of the major taxonomic groups by agglutination and examination of morphology.

characteristically reacted with serum A, and group usually with serum D, although occasionally also with sera A or B. The groups of species associated with and were antigenically heterogeneous, but were distinguished by morphology of the cells.

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1972-11-01
2021-10-21
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