Amniculicolaceae Y. Zhang et al., in Zhang et al., Stud. Mycol. 64: 95 (2009)

Index Fungorum Number: IF515469
Saprobic in freshwater habitats. Sexual state: Ascomata solitary, scattered or in small groups, erumpent, immersed or nearly superficial, globose, subglobose to lenticular, with rough black surface, usually staining the woody substrate shades of purple, ostiolate. Ostiole with elongate apex and ostiolar canal filled with hyaline cells. Peridium two-layered, outer layer of small heavily pigmented thick-walled cells of textura angularis, inner layer of hyaline thin-walled cells textura angularis. Hamathecium comprising numerous, hyaline, septate, narrow, trabeculate, pseudoparaphyses, embedded in a gel matrix. Asci 8-spored, bitunicate, fissitunicate, long cylindrical to clavate, short-pedicellate, apically truncate, with an ocular chamber. Ascospores 1–2-seriate, fusiform or narrowly fusiform, hyaline, reddish-brown or pale, one to multi-septate, or muriform, constricted at the median septum, generally surrounded by an irregular, hyaline, gelatinous sheath. Asexual states: closely related to Anguillospora longissima (Sacc. & P. Syd.) Ingold, Spirosphaera cupreorufescens Voglmayr and Repetophragma ontariense (Matsush.) W.P. Wu (Zhang et al. 2008b, 2012a; Shearer et al. 2009).

Notes: The family Amniculicolaceae was formally introduced by Zhang et al. (2009b) to accommodate various freshwater fungi collected from Europe in the order Pleosporales and accepted by Shearer et al. (2009). The family is characterized by ascomata with a rough black surface, usually staining the woody substrate purple, trabeculate pseudoparaphyses and short-pedicellate asci bearing hyaline, reddish-brown or pale, 1-multi-septate or muriform ascospores, generally with hyaline gelatinous sheath (Zhang et al. 2009b). Currently, the family comprises three genera, Amniculicola (type), Murispora and Neomassariosphaeria that form a well-supported clade in the Pleosporales (Zhang et al. 2009a). Seifert et al. (2011) also confirmed the placement of Anguillospora in Amniculicolaceae but the placement of Repetophragma and Spirosphaera is confused as it has some lineages in Sordariomycetes. Hence we conclude that Amniculicolaceae have Anguillospora, “Spirosphaera”-like and “Repetophragma”-like hyphomycetous asexual morphs.

Genera

Key to genera of Amniculicolaceae
1. Ascospores two-celled …………………………………………………………………………………………………………………………………………………………………………. Amniculicola
1. Ascosporeswith more than two septa ……………………………………………………………………………………………………………………………………………………………………… 2
2. Ascospores muriform, pale or reddish-brown …………………………………………………………………………………………………………………………………………… Murispora
2. Ascospores with trans-septa only, hyaline to reddish-brown ……………………………………………………………………………………………………… Neomassariosphaeria