A New Species of Leptosphaeria, an Etiologic Agent of Mycetoma

Publisher Website
Google Scholar
Abstract
L. tompkinsii was isolated by G. Segretain from a Mauritanian patient in Paris, and was included in L. senegalensis. The 2 spp. resemble each other in growth habit in culture and in the morphology of the ascocarp. Both are homothallic and produce no asexual spores. However, the perithecia of L. tompkinsii are larger (214-535 [mu]) than those of L. senegalensis (100-300 [mu]) and possess a thin differentiated area at the ascocarp apex that is not found in the latter sp. The asci of L. tompkinsii are slightly larger (80-115 x 20-25) than those of L. senegalensis (80-100 x 17-22 [mu]). The main differences are found in the ascospores in regard to size, shape, septation, and the nature of the gelatinous sheath. The ascospores of L. tompkinsii are 32-45 x 8-11 [mu], fusoid, 4-8 septate, mostly 6- and 7-septate, surrounded by a hyaline gelatinous sheath. The latter is fusoid like the spore and has no differentiated satellite on the spore base. The ascospores of L. senegalensis are 23-30 x 8-10 [mu], ellipsoid, 4-septate, and surrounded by a turbinate gelatinous sheath bearing a distinctive satellite at the spore base.

This publication has 1 reference indexed in Scilit: