Thysananthus retusus subsp. sellingii (Herzog) Sukkharak., 2015

Sukkharak, Phiangphak, 2015, A systematic monograph of the genus Thysananthus (Lejeuneaceae, Marchantiophyta), Phytotaxa 193 (1), pp. 448-450 : 448-450

15b. Thysananthus retusus subsp. sellingii (Herzog) Sukkharak. Thysananthus sellingii (Herzog) Hürlimann (1989: 168) . Mastigolejeunea sellingii Herzog (1953: 60) . Type: NEW CALEDONIA. South: slope above N. branch of Yaté River, humid forest with Dacrydium, O. Selling 144 p. p. (holotype JE!; isotypes S 2 packets!).

Lobules 0.3–0.4 × 0.1–0.2 mm, 4–5 × longer than wide, 1/2 × lobe length. Figs. 29B, G .

Thysananthus ( Lejeuneaceae , Marchantiophyta) Phytotaxa 193 (1) © 2015 Magnolia Press • 47

Distribution and ecology:— Endemic to New Caledonia; 400–700 m; on tree trunks in lowland rain forests.

Representative specimens:— New Caledonia. SOUTH: Mé Amméri, Guillaumin & Baumann-Bodenheim 8902, 9136 (G, GOET); Rivière Blanche, Guillaumin & Baumann-Bodenheim 11900 (G, GOET); Rivière Bleue, Guillaumin & Baumann-Bodenheim 10893 (GOET); Koghis Mts., Bouo summit, Hürlimann 2111 (G, GOET, U); Pourina, Hürlimann 2647c (GOET).

Subspecific variation:— Thysananthus retusus subsp. sellingii differs from subsp. retusus in the much greater length of lobule, which is 5 × longer than wide. Thysananthus sellingii is treated here as a subspecies of T. retusus because it is separated from the latter by only one diagnostic morphological character and by its different geographical range.

Figures

FIGURE 29. Thysananthus retusus (Reinw., Blume & Nees) B.M.Thiers & Gradst. A–E. Portion of shoot, ventral view. F–I. Leaves, ventral view. J–L. Underleaves, ventral view. M–N. Leaf lobule apices. (A, F, J, M from the holotype of T. australis; C, H, K, N from Gradstein 3963 (GOET); D from the holotype; E, I, L from Degelius 223 (JE).—T. retusus subsp. sellingii (Herzog) Sukkharak. B. Portion of shoot, ventral view. G. Leaves, ventral view. (All from the holotype).