Capnodiales » Teratosphaeriaceae


Neocatenulostroma Quaedvl. & Crous, Persoonia 33: 26 (2014)

Index Fungorum number: IF 807805; Facesoffungi number: FoF 07021, 3 morphological species (Species Fungorum 2021), 3 species with molecular data.

Plant pathogenic (foliicolous) and saprobic. Mycelium immersed, pale brown, septate, smooth. Sexual morph: Ascomata amphigenous, immersed, substomatal, subepidermal, with small or no papilla, globose to slightly subglobose, with periphysate central ostiole. Peridium comprising two strata, the outer stratum of thick-walled, medium brown small-celled textura angularis, becoming thinner-walled and hyaline in the inner stratum. Asci obclavate to globose, bitunicate, sessile, narrowing to a rounded apex, 8-spored. Ascospores broadly fusiform, medianly 1-septate, hyaline to pale brown, smooth, eguttulate, with obtuse apices, with or without a mucilaginous sheath. Asexual morph: Colonies sporodochial, pulvinate, dry, dark brown to black. Conidiophores macronematous, mainly straight, caespitose, closely packed, emerging through stomata forming the sporodochia, short, smooth, olivaceous-brown. Conidiogenous cells irregularly cylindrical, terminal, holoblastic, delimitation of conidium by a single septum, with retrogressive delimitation of next conidium, giving an unconnected chain of conidia, secession schizolytic. Conidia variously shaped, cylindrical, Y-shaped, ellipsoidal, straight or curved, with rounded or truncated apices, catenate in branched basipetal chains, which are schizogenous, olivaceous to red-brown, multiseptate, with transverse and often longitudinal or oblique septa (Adapted from Quaedvlieg et al. 2014).


Type species: Neocatenulostroma microsporum (Joanne E. Taylor & Crous) Quaedvl. & Crous


Notes: Neocatenulostroma was introduced by Quaedvlieg and Crous (2014) with N. microsporum as type species. Neocatenulostroma differs from Catenulostroma s.str. in having chains of irregularly branched conidia with transverse, longitudinal or oblique septa, variously shaped, from cylindrical to Y-shaped or ellipsoidal while Catenulostroma s.str. has colonies that produce muriform eu- or distoseptate conidia in branched chains. Neocatenulostroma is morphologically and phylogenetically a distinct genus in Teratosphaeriaceae.


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