Isolation and characterization of a new fungal genus and species, Aphanoascella galapagosensis, from carapace keratitis of a Galapagos tortoise (Chelonoidis nigra microphyes)

D. A. Sutton, Y. Marín, E. H. Thompson, B. L. Wickes, J. Fu, D. García, A. Swinford, T. De Maar, J. Guarro

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6 Scopus citations


A new fungal genus and species, Aphanoascella galapagosensis, recovered from carapace keratitis in a Galapagos tortoise residing in a south Texas zoological collection, is characterized and described. The presence of a pale peridium composed of textura epidermoidea surrounded by scarce Hülle cell-like chlamydospores, and the characteristic reticulate ascospores with an equatorial rim separates it from other genera within the Onygenales. The phylogenetic tree inferred from the analysis of D1/D2 sequences demonstrates that this fungus represents a new lineage within that order. As D1/D2 and ITS sequence data also shows a further separation of Aphanoascus spp. into two monophyletic groups, we propose to retain the generic name Keratinophyton for species whose ascospores are pitted and display a conspicuous equatorial rim, and thereby propose new combinations in this genus for four Aphanoascus species.

Original languageEnglish (US)
Pages (from-to)113-120
Number of pages8
JournalMedical mycology
Issue number2
StatePublished - Feb 2013



  • Aphanoascella
  • Aphanoascella galapagosensis
  • Galapagos tortoise
  • Keratinophyton
  • Onygenales

ASJC Scopus subject areas

  • Infectious Diseases

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