1. Clastobryopsis brevinervis Fleisch. 短茎拟疣胞藓 duan jing ni you bao xian
Musci Buitenzorg 4: 1185. 1923. Aptychella brevinervis (Fleisch.) Fleisch., Musci Buitenzorg 4: 1671. 1923. Type: Indonesia.
Stems short, prostrate or spirally ascending near the apex, simple, up to 15 mm long. Gemmae axillary, 1.2–1.5 mm long, often on the upper and middle stems and branches. Leaves lanceolate, acuminate, ±2.5 mm × 0.6 mm, deeply plicate, semicanaliculate above; leaf margins frequently involute throughout; costae single, up to the midleaf; leaf cells linear, 50–65 µm × 4.0–4.5 mm; upper cells short, thick-walled; lower cells shorter; strongly decurrent, sometimes up to 1/4 the leaf length; alar cells 15–25 µm × 9–15 mm. Sporophytes not seen.