| S. bononiae | Resupinate to effused-reflexed. Corky to somewhat pliable. Pilei when present forming on the center and margins of the basidiomes. | Cylindrical, with acute to truncate apices, somewhat clustered and flattened. With an evident granulose aspect due to protuding cystidia; 4–6 per mm; Lm = 0.51 mm. | Ellipsoid. 3.1 × 2.0 µm. | Skeletocystidia elongated, covered with a thick cap of crystals, projecting above the hymenium; (20) 35–65 × 5–9 (10) µm. |
| S. elegantissimum | Resupinate. Forming small patches on the substratum that fuse as they grow. Membranaceous and pliable. | Conical to filiform, with acute apices, solitary, very thin and waxy; 6–8 per mm; Lm = 0.41 mm. | Ellipsoid. 4.2 × 2.5 µm. | Skeletocystidia elongated, covered with a cap of thin crystals, projecting above the hymenium; 20–70 (75) x 4–8 µm. |
| S. larssonii | Resupinate to effused-reflexd. Pilei forming on the margins of the basidiomes. Waxy to corky. | Cylindrical, with round to acute apices, mostly solitary, 4–6 per mm; Lm = 0.5 mm. | Subglobose to broadly ellipsoid. 3.9 × 3.2 µm. | Skeletocystidia covered with a cap of crystals, protruding into the hymenium or slightly above it; 30–50 (60) × 7–10 µm. |
| S. molle | Resupinate. Usually forming large patches. Soft to membranaceous, pliable and easily tearing. | Cylindrical to filiform, with acute apices., mostly solitary, 5–7 per mm. Lm = 0.45. | Ellipsoid. 3.1 × 2.1 µm. | Skeletocystidia coarsely encrusted with large crystals, immersed in the trama or with the apices protruding into the hymenium; (20) 30–60 × 7–13 (15) µm. |
| S. perparvulum | Resupinate to effused-reflexed. Papery and pliable, easily tearing. When present, small pilei forming on the margins of the basidiomes. | Conical to cylindrical, with acute apices, solitary; 4–7 per mm; Lm = 0.43 mm (reaching up to 0.7 mm in effused-reflexed basidiomes). | Subglobose to broadly ellipsoid. 2.7 × 1.9 µm. | Skeletocystidia covered with a cap of crystals, immersed in the trama or with the apices projecting above the hymenium; (20) 25–42 (48) × (4) 6–12 (15) µm. |
| S. resinaceum | Resupinate. Membranaceous to papery and pliable when flesh, turning waxy and tough upon drying. | Cylindrical, with truncate to acute apices, often bifurcate and laterally fused; clustered when dried. 5–6 per mm; Lm = 0.52. | Ellipsoid. 3.0 × 2.0 µm. | Skeletocystidia coarsely encrusted with large crystals, immersed in the trama or with the apices protruding into the hymenium; 25–45 (50) × (7) 9–11 (12) µm. |
| S. subochraceum | Effused-reflexed, with imbricate pilei. Papery to corky and somewhat pliable. | Cylindrical, with truncate to acute apices, solitary; 3–5 per mm; Lm = 1.52. | Subglobose. 3.8 × 3.3 µm. | Skeletocystidia elongated, covered with a thin cap of crystals, immersed in the trama or more rarely projecting outwards; 25–50 × 5–8 (9) µm. |
| S. undulatum | Effused-reflexed. With very small imbricate pilei forming a wavy pattern on the basidiomes. | Conical to cylindrical, with acute to round apices, sometimes flattened, solitary or arising from a common base; 4–6 per mm; Lm = 0.85 mm. | Ellipsoid. 3.6 × 2.3 µm. | Skeletocystidia covered with a cap of crystals, immersed in the trama or with the apices protruding into the hymenium; 20–60 × 7–10 µm. |