Cheilolejeunea aneogyna Evans 1900
Creators: name: Gil-Novoa, Jorge Enrique
name: Costa, Denise Pinheiro
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Plantae
Marchantiophyta
Jungermanniopsida
Porellales
Lejeuneaceae
Cheilolejeunea
Cheilolejeunea aneogyna

description: 3. Cheilolejeunea aneogyna (Spruce) Evans (1900: 440).—
Lejeunea aneogyna Spruce (1884: 254).
Type:— VENEZUELA. San Carlos, in ramulis et mortuis, R. Spruce L103 (MANCH!, lectotype designated by Grolle 1979).— Fig. 2W –CC.
Cheilolejeunea assurgens (Spruce 1884: 256) Stephani (1914: 651), syn. fide Bastos (2012a).
Plants dark brown to yellowish brown, often 0.9 mm wide. Stems in cross section 60–80 µm in diameter, 7–8 epidermal cells in cross section, 16–20 × 7–11 µm; 9–10 medullary cells, 8–11 × 4–7 µm. Ventral merophytes 2 cells wide. Leaves subimbricate, orbicular to ovate, fully flat to slightly recurved at the apex, 440–480 × 340–400 µm; margin entire, apex rounded; cells smooth, inconspicuous trigones; basal cells ovate, 19–24 × 12–17 µm, median cells 15–20 × 9–14 µm, marginal cells 10–14 × 9–11 µm. Lobules ovoid to almost rectangular, ca. 1/4 of leaf length, with two teeth prominent and obtuse, usually overlapping each other; free margin slightly involute, keel arched. Underleaves distant to contiguous, orbicular to ovate, 2–3 x wider than the stem, 200–260 × 180–240 µm, bifid to 1/3, with a V-shaped sinus, margin entire, base cuneate. Autoicous. Androecia on short-specialized branches or intercalary on long shoots, 3–6 pairs of bracts. Gynoecia on branches, without innovations, bracts obovate, 350 × 200 µm, apex rounded, lobule 120 × 230 µm, bracteole ovate, slightly smaller than bracts, bifid to 1/8. Perianth with 4 prominent keels at the apex, beak short. Vegetative reproduction by caducous leaves.
Distribution and habitat:—Neotropical, occurring in Panamá, Colombia, Bolivia, Venezuela, Ecuador, Brazil, and Jamaica (Bastos 2017, Campos et al. 2014, Schäfer-Verwimp et al. 2013). In the study area, this species generally grows on tree trunks, in lowland rainforest and lower montane rainforest, between 20–800(–1400) m, in GuatusoTalamanca, Magdalena, and the Ecuadorian provinces of Pacific dominion (Fig. 3).
Notes:—Characterized by the presence of two lobule teeth, with the first tooth usually covering the second tooth (requiring observation of many lobules). Bastos & Gradstein (2020) described a new variety, C. aneogyna var. riparia, characterized by dioicous sexuality and pycnolejeuneoid innovations, and being restricted to Amazonian forests. This variety might possibly occur in the study area as well but has not yet been recorded there.
Specimens examined:— BRAZIL. Amazonas: Manaus, 3°03’39”S, 60°00’47”W, 90 m, 8 August 1974, Griffin III 772 (COL). São Paulo: Praia Grande, 24°0’46”S, 46°33’46”W, 20-780 m, 25 August 2016, Prudêncio 86 (RB). COLOMBIA. Amazonas: Comunidad “Peña Roja”, 0°34’S, 72°08’W, 200 m, 14 July 2000, Idárraga 24318, 2432, 2442, 2482 (HUA). Antioquia: Yondó, 6°42’2.9” N, 74°24’54.1” W, 109 m, 26 November 2017, Larrota 10897 (COL). Cundinamarca: Guaduas, 1388 m, 1 September 2017, Malagón 850 (COL). ECUADOR. Guayas: Camacho, 2°48.6’S, 79°38.9’W, 100 m, 14 March 2012, Schafer-Verwimp s.n. (QCA).
description: Published as part of Gil-Novoa, Jorge Enrique & Costa, Denise Pinheiro, 2023, Synopsis of the species of Cheilolejeunea (Marchantiophyta, Lejeuneaceae) in the Pacific dominion and Páramo province of tropical America, pp. 73-120 in Phytotaxa 587 (2) on page 83, DOI: 10.11646/phytotaxa.587.2.1, http://zenodo.org/record/7731813