Puiggariella Speg., Anal. Soc. Cient. Argentina 12: 99 (1881); Jiang et al., Fung. Div. 102: 280.
MycoBank number: MB 4546; Index Fungorum number: IF 4546; Facesoffungi number: FoF 08885; four morphologically delimited species (Jiang et al. 2020b); molecular data available for two species (Jiang et al. 2020b).
= Amoebomyces Bat. & H. Maia, Atas Inst. Micol. Univ. Pernambuco 2: 353 (1965); Lücking et al., Lichenologist 30: 135 (1998).
Type species: Amoebomyces pseudolmediae Bat. & H. Maia [= Strigula nemathora Mont.].
Lichenized on leaves in terrestrial, lowland to montane, tropical habitats. Thallus (pseudo-)corticate, light grey- green to whitish green, subcuticular, typically rugoseplicate and with numerous small, white papillae. Photobiont Cephaleuros. Sexual morph: Ascomata perithecia, erumpent to prominent, pale, usually covered by thallus layer, wart-shaped, non-carbonaceous, ostiolate. Involucrellum present, pale to brownish. Excipulum prosoplectenchymatous, pale to brownish. Hamathecium comprising 0.5–0.7 µm wide paraphyses, hyaline, flexuose, unbranched or very rarely branched and anastomosing. Asci 8-spored, bitunicate, fissitunicate, narrowly obclavate, shortly pedicellate, with narrow ocular chamber, non-amyloid. Ascospores irregularly arranged to biseriate, fusiform, hyaline, 1-septate, with thin eusepta and rectangular lumina, smooth-walled, constricted at the septa. Asexual morph: Pycnidia infrequent, immersed, visible as dark dots. Conidia acrogenous, either macro- or microconidia; macroconidia 1-septate,bacillar, with gelatinous appendages, hyaline; microconidia usually aseptate, ellipsoid to fusiform, small, hyaline.
Chemistry: No secondary substances known.
Type species: Puiggariella apiahyna Speg. [= Puiggari- ella nemathora (Mont.) S.H. Jiang, Lücking & J.C.Wei in; Jiang et al., Fungal Div. 102: 282.
Notes: The only species previously recognized in this group by Santesson (1952) and subsequent workers, Strigula nemathora, was long considered unique due to its pale, non-carbonized perithecia, in combination with its thallus appearing folded and featuring numerous small, white papillae. Phylogenetically, this taxon not only forms a separate clade, but the available data also indicate that Puiggariella nemathora is a collective species, including several related lineages differing largely in their morphology (Jiang et al. 2020b). Currently, three species are accepted in the genus (Jiang et al. 2020b).