The correlation among molecular phylogenetics, morphological data, and growth temperature of the genus Emericella, and a new species
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The species of the genus Emericella have been classified and identified on the basis of morphological features. However, the phylogenetic relationships in this genus have not been investigated. To clarify the relationships according to molecular phylogenetics, morphological characteristics, and growth temperature regimens in Emericella, multilocus sequencing analysis based on recent Aspergillus taxonomy was carried out. Various characteristic species formed individual clades, and maximum growth temperature reflected the phylogenetics. Emericella species exhibit various ascospore characteristics, although some species do not have distinct ascospore ornamentation. Species that have smooth-walled ascospores with two equatorial crests are polyphyletic. Here, Emericella pachycristata is described and illustrated as a new species. Its ascospores are similar to those of E. nidulans. These species produce smooth-walled ascospores, but the equatorial crests of E. pachycristata are thicker than those of E. nidulans. On the phylogenetic trees, E. pachycristata is closely related to E. rugulosa, which produces ascospores with ribbed convex surfaces. Thus, E. pachycristata is considered to be a new species both morphologically and phylogenetically.
KeywordsEmericella pachycristata Morphological features New taxon Physiological characteristics
This work was supported in part by the National Bioresource Project “Pathogenic microbes in Japan” (http://www.nbrp.jp/) and a Grant-in-Aid for Scientific Research (B-18405005) from the Japan Society for the Promotion of Science.
- De Hoog GS, Guarro J, Gené J, Figueras MJ (2000) Atlas of clinical fungi, 2nd edn. Centraalbureau voor Schimmelcultures, Utrecht, pp 486–488Google Scholar
- Horie Y (1979) New or interesting Emericella from herbal drugs. Trans Mycol Soc Jpn 20:481–491Google Scholar
- Horie Y (1980) Ascospore ornamentation and its application to the taxonomic re-revaluation in Emericella. Trans Mycol Soc Jpn 21:483–493Google Scholar
- Keller NP (2006) Aspergillus nidulans: a model for elucidation of Aspergillus fumigatus secondary metabolism. In: Heitman J, Filler SG, Edwards JE Jr, Mitchell AP (eds) Molecular principles of fungal pathogenesis. ASM Press, Washington, DC, pp 235–243Google Scholar
- Kornerup A, Wanscher JH (1978) Methuen handbook of colour, 3rd edn. Methuen, London, p 252Google Scholar
- Raper KB, Fennell DI (1965) The genus Aspergillus. Williams & Wilkins, Baltimore, pp 491–542Google Scholar
- Swofford DL (2002) PAUP*: phylogenetic analysis using parsimony (*and other methods), version 4b10. Sinauer Associates, SunderlandGoogle Scholar
- Udagawa S, Muroi T (1979) Some interesting species of Ascomycetes from imported spices. Trans Mycol Soc Jpn 20:13–22Google Scholar