Thallus habitus: ARostania occultata var. populina (Odelvik 1269, S), thallus lobes (arrow) B Rostania multipunctata (Poelt 8852, GZU), accessory lobules (arrow) C Rostania ceranisca (MW_HOCH020, S), accessory finger-like lobules (arrow) D Rostania laevispora (isotype of Collema laevisporum Swinscow & Krog, Tanzania, 1986, Swinscow & Krog T 3/6, O-00298), apothecium in initial stage (arrow) E Rostania callibotrys (Moberg 4431a, UPS), apothecium in initial stage (arrow). tL = thallus lobes, al = accessory lobules, Ai = apothecium in initial stage covering the top of the accessory lobules. Scale bar: 1 cm.