[3] Over time, it was subsumed within Strigula due to shared morphological features, such as pale, non-carbonised perithecia (fruiting bodies) and folded thalli with small white papillae.

Molecular phylogenetics studies, particularly those by Jiang and colleagues (2020), have justified the resurrection of Puiggariella as a distinct genus, recognising its unique evolutionary lineage within foliicolous (leaf-dwelling) fungi.

The light grey-green to whitish thalli of Puiggariella are subcuticular (partially embedded within the leaf surface), often with a rugose (wrinkled) or plicate (folded) texture and scattered white papillae.

It is either corticate or pseudocorticate (having a thin, incomplete outer layer) and often has a wrinkled and folded (rugose-plicate) texture, interspersed with numerous small, white, wart-like projections (papillae).

[4] Inside, the hamathecium comprises slender, flexible, unbranched, or occasionally branched filaments called paraphyses, which are colourless (hyaline) and measure 0.5–0.7 μm in width.

These structures produce two types of asexual spores (conidia): larger, rod-shaped macroconidia with one septum and gelatinous appendages, and smaller, ellipsoid to spindle-shaped (fusiform) microconidia that lack septa.