Anthoceros tristanianus J.C.Villarreal, J.J.Engel & Váňa
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publication ID |
https://doi.org/ 10.5252/cryptogamie-bryologie2020v41a9 |
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persistent identifier |
https://treatment.plazi.org/id/03CDCD36-FF97-961A-FCD5-FEC74B67F9E5 |
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treatment provided by |
Felipe |
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scientific name |
Anthoceros tristanianus J.C.Villarreal, J.J.Engel & Váňa |
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Anthoceros tristanianus J.C.Villarreal, J.J.Engel & Váňa
( Fig. 1 View FIG )
In Memoirs of the New York Botanical Garden, Váňa & Engel
105: 33 (2013).
TYPE. — Tristan Da Cunha. Along small stream W. of the Settlement of Edinburgh, in open grassland, 30 m, Gremmen 2005- T 028 (holo-, herb. J. Váňa; see note below).
SPECIMENS STUDIED. — Colombia. Boyacá, Muncipio de Guican, Vereda San Antonio de la Cueva, Sendero Lagunillas-Pulpito, 11.VIII.2017. Roadside over exposed area on soil and rock, 6°23’50.53”N, 72°21’42.18”W, 3920 m a.s.l. collected by G. F. Peñaloza-Bojacá, D. Sanín, M. Sundeu, W.Texto & B. Moncada 915, 926, 927, 928, 930 ( COL, BHCB [198757: GFPB 927, 198758: GFPB 915]).
DESCRIPTION
Plants
Thallus dark green; 13.1-17 mm long and 3-6.2 mm wide; margins lobulated, dorsal lamellae absent. Schizogenous cavities scarce; transverse section of thallus 40-300 × 60-590 Μm. One chloroplast per cell, without a pyrenoid; rhizoids hyaline to brownish. Monoicous. Androecia scattered over dorsal surface; antheridial chamber 0.34-0.46 mm in diameter; 3-8 antheridia per chamber ( Fig. 1B View FIG ); spherical; brownish; antheridial length 107.5-140 Μm and jacket cells regularly arranged into four tiers. Involucre 2.2-6.8 mm long; lamellae absent ( Fig. 1A View FIG ). Sporophytes 1-3 per gametophyte. Capsule 2.2-35 mm long; dehiscent by two longitudinal valves; epidermal cells of capsule elongate; 7.5-17.5 × 52.5-132.5 Μm, with thin to slightly thickened-walls; stomata abundant ( Fig. 1C View FIG ); assimilative tissue 3-6 cells thick in transverse section. Columella rigid and brownish with 16 cells in cross section. Pseudoelaters brownish to blackish at maturity; 1-4 cells; 47.5-137.7 Μm long (n = 36 pseudoelaters measured from seven sporophytes). Spores dark brown to blackish at maturity; 40-75 Μm in diameter (n = 112 spores from seven sporophytes; proximal surface with a distinct trilete mark; triangular areas with a central wart; ornamentation of scattered single papillae; up to 1 Μm high ( Fig. 1D View FIG ); distal surface with spines single, bifid, or confluent; 1-4 Μm long ( Fig. 1E View FIG ).
| W |
Naturhistorisches Museum Wien |
| T |
Tavera, Department of Geology and Geophysics |
| J |
University of the Witwatersrand |
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Conservatoire et Jardin botaniques de la Ville de Genève |
| F |
Field Museum of Natural History, Botany Department |
| M |
Botanische Staatssammlung München |
| B |
Botanischer Garten und Botanisches Museum Berlin-Dahlem, Zentraleinrichtung der Freien Universitaet |
| COL |
Universidad Nacional de Colombia |
| BHCB |
Universidade Federal de Minas Gerais |
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.
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