Ellula Nag Raj, Can. J. Bot. 58(18): 2013 (1980)
Faces of fungi number: FoF 07358
Basidiomycota, genera incertae sedis
Saprobic on dead culms of Guadua sp. (Poaceae). Sexual morph: undetermined. Asexual morph: Conidiomata pearl white when moist but dirty yellow when dry, stromatic, pycnidial, linearly disposed, subepidermal in origin, erumpent, gelatinous, pulvinate or cornuted, globose to subglobose in section view, unilocular or multilocular, glabrous, ostiolate. Ostiole centrally located, with an initially narrow, but ultimately wider pore, lined by densely packed, columnar bundles of hyphae with clamp connections. Conidiomatal wall composed of thick-walled, hyaline, septate hyphae of textura intricata in the exterior, gradually merging with hyaline hyphae of textura epidermoidea toward hymenium. Conidiophores arising from inner layer cells of conidiomata, hyaline, cylindrical or irregular, unbranched or rarely branched, septate, smooth-walled, with clamp connections. Conidiogenous cells hyaline, holoblastic, cylindrical, integrated or discrete, determinate, smooth-walled, arising from near clamp connections along the length of the conidiophores. Conidia hyaline, 2-septate, with a larger ellipsoidal to subcylindrical central cell, and a shorter, terete cell on either end of the central cell, with an attenuated, unbranched, apical appendage, smooth-walled, guttulate (Nag Raj 1980, 1993).
Type species: Ellula guaduae (Viégas) Nag Raj, Can. J. Bot. 58(18): 2014 (1980)
Notes: Ellula is a monotypic genus and there is no molecular data available. The genus is characterized by pycnidia with a central pore, cylindrical conidiophores bearing clamp connections, and ellipsoidal to subcylindrical conidia with an unbranched, attenuated, flexuous appendage. Ellula is similar to Cenangiomyces, Fibulocoela and Pycnovellomyces in having cylindrical conidiophores bearing clamp connections. The differences among these genera are discussed under Fibulocoela. Fresh collections are needed to clarify the taxonomy of Ellula.
Distribution: Brazil (Nag Raj 1980, 1993).
Ellula guaduae (redrawn from Nag Raj 1993) a Vertical section of conidioma. b Conidia with appendages. c Conidiophores with clamp connections at basal septa and conidia.
Li WJ, McKenZie EHC, Liu JK, Bhat DJ, Dai DQ, Caporesi E, Tian Q, Maharachcikumbura SSN, Luo ZL, Shang QJ, Zhang JF, Tangthirasunun N, Karunarathna SC, Xu JC, Hyde KD (2020) Taxonomy and phylogeny of hyaline-spored coelomycetes. Fungal Diversity 100: pages279–801.