Phaeomegaceros fimbriatus (Gottsche) R.J.Duff, J.C.Villarreal, Cargill & Renzaglia

Ibarra-Morales, Ariadna, Valencia-Avalos, Susana, Muñiz-Díaz, María Eugenia & León, De, 2020, Anatomy and morphology of Phaeomegaceros fimbriatus (Gottsche) R. J. Duff, J. C. Villarreal, Cargill & Renzaglia (Anthocerotophyta), a novel record for North America, Cryptogamie, Bryologie 20 (17), pp. 219-228 : 221

Phaeomegaceros fimbriatus (Gottsche) R.J.Duff, J.C.Villarreal, Cargill & Renzaglia

( Figs 2-3 )

The Bryologist 110: 241 (2007).

Anthoceros fimbriatus Gottsche. Annales des Sciences naturelles, Botanique sér. 5, 1: 187 (1864). — Isolectotype: Boquerón, Colombia 2800 m, A. Lindig s.n. (G).

SPECIMENS EXAMINED. — Mexico. Veracruz: Tlapacoyan, Arroyo Tendido, road Teziutlán-Tlapacoyan, 19°55’26”N, 97°15’17”W, growing on shadded 85° slopes, elevation: 790 m, A Mendoza s.n. (FCME). 13.XII.2011.

Figures

FIG. 2. — Phaeomegaceros fimbriatus (Gottsche) R.J.Duff, J.C.Villarreal, Cargill & Renzaglia: A, female plant; B, transverse section of gametophyte thallus with band-like thickenings (eng) in cell walls; C, transverse section of gametophyte thallus with ventral tuber (tv) surrounded by rhizoids (ri); D, dorsal surface of a male plant with an antheridium (an) in each antheridial chamber; E, transverse section of a male plant with numerous antheridial chambers (can) and an antheridium (an); F, close up on antheridium (an); G, transverse section of involucre (i) with numerous lamellae (l); H, longitudinal section of the sporophyte foot (e) with placenta (pl); I, longitudinal section of sporophyte capsule with assimilative tissue (ta), spores (es) and central columella (c); J, transverse section of sporophyte with epidermis (ep), assimilative tissue (ta) and central columella (c); K, close up of spores (es), pseudoelaters and central columella (c); L, spores (es) and pseudoelaters (ps). Scale bars: A, 5 mm; B, I, K, 50 µm; C, F, H, J, 100 µm; D, E, G, 200 µm L, 30 µm.

FIG. 3. — Spores of Phaeomegaceros fimbriatus (Gottsche) R.J.Duff,J.C.Villarreal,Cargill & Renzaglia under scanning electron microscopy:A-B, distal face varia- tion of the spores:A, five depressions surrounding a central depression on distal face of spores;B, six depressions surrounding a central depression on distal face of spores; C, proximal face with button-like verrucae confined to the center of triangular areas; D, spore tetrads (tesp) and pseudoelaters (ps). Scale bars:10 µm.