Puiggariella
Puiggariella Speg., Anal. Soc. Cient. Argentina 12: 99 (1881); Jiang et al., Fung. Div. 102: 280.
= Amoebomyces Bat. & H. Maia, Atas Inst. Micol. Univ. Pernambuco 2: 353 (1965); Lücking et al., Lichenologist 30: 135 (1998).
Index Fungorum number: IF 4546; Facesoffungi number: FoF 08885, 4 morphological species (Species Fungorum 2022), 2 species with molecular data.
Thallus foliicolous, subcuticular, with entire margins or crenulate-lobulate to laciniate, lobes widely separated to completely confluent, surface usually with numerous minute, white papillae. Photobiont Cephaleuros. Sexual morph: Perithecia immersed-erumpent to prominent, wart-shaped to applanately conical, often ridged or fissured; excipulum prosoplectenchymatous, colorless; involucrellum colorless to pale brown, not carbonized; hamathecium colorless, I–, KI–; paraphyses unbranched, thin. Asci bitunicate, with short thallus and narrow, ocular chamber, I–, KI–, clavate to oblong. Ascospores 8 per ascus, uniseriate to biseriate, fusiform, uniseptate, colorless. Asexual morph: Pycnidia immersed-erumpent, wart-shaped to conical, pale to brownish. Macroconidia bacillar to filiform,uniseptate, colorless, both ends usually with short to medium length gelatinous appendages. Microconidia fusiform-ellipsoid, non-septate, colorless. Chemistry: No substances detected by TLC (adapted from Jiang et al. 2020).
Type species: Puiggariella apiahyna Speg.
Notes: Puiggariella is characterised by crenulate-lobulate to laciniate thallus, immersed-erumpent to prominent perithecia, clavate to oblong asci and uniseriate to biseriate, fusiform, uniseptate ascospores. The asexual morph is characterised by immersed-erumpent, wart-shaped to conical, pale to brownish pycnidia, bacillar to filiform, uniseptate, colorless macroconidia and fusiform-ellipsoid, non-septate, colorless microconidia. Puiggariella differs from other genera in Strigulaceae in thallus morphology namely laciniate and white papillae and uncarbonized perithecia. Santesson (1952) included P. apiahyna in Strigula. Jiang et al. (2020) accepted three species P. confluens, P. nigrocincta and P. nemathora and provided a key to species. Puiggariella is currently a distinct genus in Strigulaceae. Molecular markers available for Puiggariella (P. nemathora and P. nigrocincta) include ITS, SSU, RPB2 and TEF-1.
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