Synonyms: Anaptychia aquila var. stippaea sensu Dalla Torre & Sarnth.; Anaptychia fusca var. stippaea auct.; Anaptychia stippaea (Ach.) Nádv sensu Nádv.
Distribution: N - Frl (Tretiach & Hafellner 2000), Ven (Nascimbene 2003b), TAA, Lomb, Piem (Nascimbene & al. 2021), VA. C - Sar (ASU 504620 det R. Moberg).
Description: Thallus foliose, heteromerous, dorsiventral, loosely attached. Lobes linear, flattened, smooth, ascending, often overlapping, 0.3-0.7(-1) mm broad and to 7 mm long, often with small (0.1 mm) adventitious marginal lobules. Upper surface olive-brown to chestnut brown, darker in sun-forms; lower surface whitish to pale brown, with a few sparse, mostly simple, brown rhizines. Upper cortex of interwoven hyphae; medulla white; lower cortex poorly developed, the hyphae running parallel to the surface. Apothecia not known. Photobiont chlorococcoid. Spot tests: thallus and medulla K-, C-, KC-, P-, UV-. Chemistry: no lichen substances.
Note: an arctic-alpine to boreal-montane, probably circumpolar species found amongst mosses and muribund plants on base-rich siliceous substrata in the alpine and subalpine belts.
Growth form: Fruticose
Substrata: soil, terricolous mosses, and plant debris