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Table 2 A comparison of morphological characters of the genus Auxarthron, Auxarthronopsis, and Amauroascus.

From: Auxarthronopsis, a new genus of Onygenales isolated from the vicinity of Bandhavgarh National Park, India

Character   Auxarthron Auxarthronopsis Amauroascus
Ascomata Colour Yellow-brown to brown White to pale cream White, yellow or brown
  Size <700 500–1000 Up to 2.5 mm
Ascoma type   Reticuloperidium Reticuloperidium Incompositoperidium
Asci   Subglobose, globose or ovoid, 8-spored, evanescent,
7.2–8 × 10.6 µm
Globose, 8-spored, hyaline evanescent,
5 × 5.5 µm
Ovoid, 8-spored, up to 14 µm
Ascospore Colour Hyaline, to yellow or yellow-brown Hyaline Hyaline, yellow or reddish brown to dark brown
  Shape spherical to oblate, minutely punctuate to punctate-reticulate globose to subglobose, finely and regularly punctate, globose in polar view but oblate in equatorial view spherical with pronounced irregular or regular puncta and ridges
  Size   1.75–2.5 × 2.75–3.2 3.5–7 µm
Peridial hyphae   Reddish, rusty tan, enlarged at septa, thick cuticularized smooth to minutely to coarsely asperulate or tuberculate Pale brown, branched and anastomosed form reticulate network, with swollen septa, sparsely asperulate Usually undifferentiated in culture, occasionally pale brown, smooth & thick walled
Peridial appendages   Branches rare, tips round, sub-acute, larger appendages septate (1, 2 or 3 septa) with simple apices which are bent or slightly coiled or uncinate Multiseptate with distinct swollen septa, tapering to acute hyaline apex indistinguishable from vegetative hyphae, upto 400 µm Appendages lacking
Anamorph   Terminal, intercalary or rarely lateral, pyriform, oblong or cylindrical, aleurioconidia, arthroconidia, keratinolytic Terminal or intercalary rhexolytically dehiscing arthroconidia and aleurioconidia, slightly keratinolytic Terminal and/or intercalary rhexolytically dehiscing conidia, keratinolytic