Neodeightonia
Neodeightonia C. Booth, in Punithalingam, Mycol. Pap. 119: 17 (1970) [1969].
Index Fungorum number: IF 3450; Facesoffungi number: FoF 07627, 8 morphological species (Species Fungorum 2022), 8 species with molecular data.
Saprobic on host. Sexual morph: Ascostromata immersed, dark brown to black, with a single aparaphysate locule, wall composed of pseudoparenchymatic cells many layers thick, asci developing amongst partially disintegrating sterile thin-walled tissue in locule. Neck of ascostromata narrow, opening by an apical ostiole, formed by the disintegration of the central thin-walled cells. Pseudoparaphyses hyphae-like, septate, constricted at the septa. Asci parallel, more or less separated from one another by stromatic tissue, clavate to cylindric-clavate, 8-spored, bitunicate with a thick endotunica. Ascospores biseriate, initially hyaline, brown when mature, oval to broadly ellipsoidal with a single transverse septum, surrounded or not by a mucilaginous sheath. Asexual morph: Conidiomata brown to black, solitary or aggregated, sometimes intermixed with ascomata, globose, uni- to multilocular, stromatic, wall composed of dark-brown thick-walled textura angularis. Paraphyses absent. Conidiogenous cells holoblastic, hyaline, aseptate, cylindrical to sub-cylindrical. Conidia spherical to globose, initially hyaline, pale to dark brown when mature, thick walled, smooth to finely rough-walled with fine striations (adapted from Phillips et al. 2013).
Type species: Neodeightonia subglobosa C. Booth
Notes: Neodeightonia subglobosa was transferred to Botryosphaeria by Arx and Müller (1975) and Neodeightonia was reduced to synonymy under Botryosphaeria. Neodeightonia is characterised by dark brown to black immersed ascostromata, hyphae-like pseudoparaphyses, clavate to cylindric-clavate asci, and biseriate, hyaline to, pale to dark brown ascospores. Neodeightonia differs from Botryosphaeria in having dark, uniseptate ascospores. Neodeightonia was reinstated by Phillips et al. (2008) based on morphology and phylogenetic evidence. Punithalingam (1969) discussed the germ slits in the conidia of Neodeightonia. Crous et al. (2006) mentioned that these were actually striations on the conidial wall and this was confirmed by Phillips et al. (2008). Neodeightonia resembles Lasiodiplodia in having similar striate conidial walls but differs in lacking conidiomatal paraphyses. Neodeightonia is a distinct and well-supported genus in Botryosphaeriaceae. Molecular markers available for Neodeightonia are ITS, LSU, SSU, BTUB, TEF-1 and RPB2.
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