Ascomycota, genera » incertae sedis

Neochaetospora

Neochaetospora B. Sutton & Sankaran, Mycol. Res. 95(6): 768 (1991)

Chaetospora Faurel & Schotter, Revue Mycol., Paris 30(3): 149 (1965) [1964]

Facesoffungi number: FoF 07474

Ascomycota, genera incertae sedis

Coprophilous on rodent dung (e.g., Massoutiera harterti). Sexual morph: undetermined. Asexual morph: Conidiomata black, pycnidial, innate-erumpent, globose, unilocular, setose, ostiolate. Ostiole single, circular, centrally located. Conidiomatal setae dark brown below, tapered and paler towards apex, subulate to irregular, rigid, straight or slightly curved, unbranched, smooth-walled, mostly restricted at ostiolar region, occasionally on the pycnidial wall. Conidiomatal wall composed of thick-walled, dark brown cells of textura angularis. Conidiophores reduced to conidiogenous cells. Conidiogenous cells arising from inner cell layer of conidiomata, hyaline, enteroblastic, phialidic, lageniform to cylindrical, discrete, determinate, smooth-walled, with flared collarettes. Conidia hyaline, cylindrical to fusiform, with truncate base, 2-septate, smooth-walled, bearing 3–5, unbranched, septate, flexuous, apical appendages arising from different loci of bulbous apical cell (Nag Raj 1993).

Type species: Neochaetospora quezelii (Faurel & Schotter) B. Sutton & Sankaran, Mycol. Res. 95(6): 768 (1991)

Chaetospora quezelii Faurel & Schotter, Revue Mycol., Paris 29(3): 149 (1965) [1964]

Notes: Neochaetospora is a monotypic genus. The genus is similar to Pseudoneottiospora in having cylindrical or subcylindrical to fusiform conidia bearing unbranched, flexuous appendages. However, Neochaetospora possesses globose, setose conidiomata and 2-septate conidia with bulbous apical cell bearing 3–5-septate, apical appendages. Pseudoneottiospora has globose, glabrous conidiomata and 1–3-septate conidia with cylindrical or dolliform apical cell bearing 3–4-aseptate apical appendages (Nag Raj 1993). Neochaetospora has not been studied with molecular data. Future studies with fresh collections are needed to place it in a natural group.

Distribution: Sahara (Africa) (Nag Raj 1993).

Neochaetospora quezelii (redrawn from Nag Raj 1993) a Surface view of a conidioma. b Enlarged surface view of ostiolar setae and parietal cells. c Conidiogenous cells and developing conidia. d Conidia.

 

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