Thysananthus anguiformis (Hook.f. & Taylor) Taylor ex Gottsche, Lindenberg & Nees (1845: 289)

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

publication ID	https://doi.org/ 10.11646/phytotaxa.193.1.1
persistent identifier	https://treatment.plazi.org/id/73083D48-FF80-BF0E-FF17-3A16FF73999E
treatment provided by	Felipe
scientific name	Thysananthus anguiformis (Hook.f. & Taylor) Taylor ex Gottsche, Lindenberg & Nees (1845: 289)
status

Treatment

10. Thysananthus anguiformis (Hook.f. & Taylor) Taylor ex Gottsche, Lindenberg & Nees (1845: 289) View in CoL . Jungermannia anguiformis Hooker & Taylor (1844: 567) . Mastigolejeunea anguiformis (Hook.f & Taylor) Thiers & Gradstein (1989: 75). Lectotype (designated by Thiers & Gradstein 1989): NEW ZEALAND. without location, without date, Colenso s.n. (lectotype FH!; isolectotype NY!), ibid., Colenso 226, 1222, 2121 (paralectotypes BM!).

Plants dioicous, with projecting growth, turning upwards and becoming ascending to erect, yellowish to reddish brown in herbarium specimens, up to 3 cm long × 1–1.6 mm wide. Stems rather rigid; ventral merophyte 6–7(–9) cell rows wide; stem in cross section orbicular, 123–211 µm high× 86–217 µm wide, 6–11 cell layers high, composed of 15–27 epidermal cells surrounding 16–62 medullary cells, dorsal epidermal cells larger and somewhat thinner-walled than medulla and ventral epidermal cells. Leaves imbricate, when dry suberect and slightly convolute, when moist strongly convex and ventrad, apical part turned to the ventral side, recurved; dorsal lobe asymmetrically ovate, 0.7–1.2 × 0.5–1 mm, apex acute, margin entire, dorsal base cordate, ventral margin

Thysananthus ( Lejeuneaceae , Marchantiophyta) Phytotaxa 193 (1) © 2015 Magnolia Press • 37 plane; cells elongate-hexagonal with acute ends, vitta absent, marginal cells 7.5–10 × 7.5–12.5 µm, median cells 20–30 × 7.5–12.5 µm, basal cells 25–45 × 12.5–17.5 µm, trigones cordate, often coalesced, intermediate thickenings 0–1 per cell; oil bodies unknown. Lobules rectangular, 0.3–0.4 × 0.2–0.3 mm, ± 1/2 × lobe length, appendage on surface of lobule base not developed; keel sometimes with appendage on one side where leaves and underleaves are free and opposite to adnate ones; lobule apex rotundus, ending abruptly in a short point of ventral lobe margin, free margin slightly incurved, apex with one broadly triangular or linear tooth, the tooth consisting of 5–9 cells, being 2–3 cells wide at base and ending in a row of 1–5 cells. Underleaves imbricate, slightly squarrose, broadly obovate, 0.3–0.5 × 0.5–0.7 mm, 3–5 × stem width, apex broadly rounded to truncate, margin entire, bases cuneate, underleaf bases adnate with leaves on one side, on left-hand side for right branches and right-hand side for left branches; cells 20–22.5 × 7.5–10 µm. Androecia terminal-intercalary on lateral branches, bracts, and bracteoles in 3–6 pairs, bracts epistatic, ovate, 0.7–0.8 × 0.4–0.5 mm, apex acute, margins entire; antheridia 2 per bract. Gynoecia with 2 lejeuneoid innovation forming a dichasial pattern; lobe ovate, 0.9–1.3 × 0.5–0.8 mm, apex apiculate, margin entire; lobules broadly ovate, 1/2 × lobe length, apex apiculate, margin entire; bracteoles obovate, 0.7–0.9 × 0.5–0.8 mm, margins entire, slightly recurved. Perianths oblong, 1.2–1.3 × 0.7–0.8 mm, keel in upper 1/ 4 with triangular teeth, the teeth consisting of 3–6 cells, being 2 cells wide at base and and ending in a row of only one cell; beak 82–200 µm (6–11 cells) in length. Fig. 21 View FIGURE 21 .

Distribution and ecology:— Endemic to New Zealand; 50–150 m; on tree trunks, rotten logs, on branches in dense bush near sea shore, and in wet forest dominated by treeferns. Fig. 5F View FIGURE 5 .

Representative specimens:— New Zealand. AUCKLAND: Northcape , Bartlett 2–79–5b ( JE) ; Waitakere range near Auckland , 3 August 1983, Braggins s.n. ( GOET, U) ; Great Barrier Island, Kirk 218 (G); Coromandel state forest, Schäfer-Verwimp & Verwimp 13731 ( GOET) .— BAY OF PLENTY: Mamaku forest, Een NZ063, NZ064 (S); Rotorua , 1929, Allison s.n. (S); near Rotorua, 17 May 1929, Allison s.n. ( JE) ; 3 miles west of Rotorua , 15 April 1966, Wade s.n. ( JE) .— NORTHLAND: Waipoua Kauri forest , Hatcher 436 ( JE) , 475/b (F, JE), Schäfer-Verwimp & Verwimp 13662 ( U) ; Bay of Islands , Kirk 76 (G) .— SOUTHLAND: Martin’s bay , Hatcher 963/c ( JE) ; North of Mc Kerrow river, Hatcher 808 ( JE) .— WELLINGTON: Akatarawa forest park, Mues 80a, 80b ( U) , water fall creek, Braggins 84/431A (F).— WEST COAST: Mt. Stormy trail, Frahm 20–10 ( GOET) ; Matheson lake , Mues 80d ( U) ; Westland National Park, Schäfer-Verwimp & Verwimp 14058 ( GOET 2 packets) .

Taxonomic notes:— Thysananthus anguiformis is characterized by the truncate-rotund lobule apices, ending abruptly in a short point of ventral lobe margin. This species varies in the shape of its lobule tooth, which can be broadly triangular to linear, being made up of 5–9 cells and ending in a row of 1–5 cells.

This species, together with Thysananthus pancheri , was long been placed in Mastigolejeunea because of its entire female involucres and enlarged dorsal epidermal cells ( Thiers & Gradstein 1989). Molecular work, however, has confirmed that T. anguiformis and T. pancheri are members of Thysananthus (Wilson et al. 2007, Sukkharak et al. 2011b). The robust sister-group relationship of subsect. Thysananthus and subsect. Anguiformes is morphologically supported by the presence of adnate underleaves in these two subsections ( Sukkharak et al. 2011b).