Cheilolejeunea holostipa Grolle & Zhu (2001: 1071
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 holostipa

description: 13. Cheilolejeunea holostipa (Spruce) Grolle & Zhu (2001: 1071).—
Lejeunea holostipa Spruce (1884: 171).
Type:—BRAZIL. Pará, Spruce L219 (MANCH!, lectotype designated by Grolle & Reiner-Drehwald 1999).—Fig. 10A–G.
Plants light brown, 0.3–5 mm wide. Stems in cross section 80–100 µm in diameter, 7 epidermal cells and 4–6 medullary cells. Ventral merophytes 2 cells wide. Leaves subimbricate to imbricate, ovate, flat to slightly concave, 230–300 × 200–250 µm; margin entire, apex rounded, dorsal and ventral curved; cells orbicular to ovate, conspicuous trigones (but not very large); basal cells 12–22 × 16–18 µm, median cells 16–18 × 13–16 µm, marginal cells 10–13 × 6–8 µm, smooth. Lobules large, 1/2 of leaf length, ovate, more or less inflated, tooth acute, formed by one long cell, 27 × 6 µm, free margin involute, keel curved, and terminal tooth acute. Underleaves distant, orbicular, 90–100 × 100–110 µm, 1.5–2 × stem width, entire, insertion base cuneate. Dioicous. Androecia in principal stem, with 2–5 pairs of bracts. Gynoecia on short shoots with innovations pycnolejeuneoid, bracts obovate, 400 × 300 µm, apex rounded; lobule 180 × 80 µm, bracteole ovate 330 × 270 µm, bifid to 1/3, generally recurved. Perianth with 5 weak to strong keels in the upper half of the perianth, beak long. Vegetative reproduction unknown.
Distribution and habitat:—Neotropical, occurring on Caribbean islands, Mexico, Honduras, Costa Rica, Panamá, Colombia, Venezuela, Guianas, Ecuador, Peru, and Brazil (Bastos 2017, Schäfer-Verwimp 1999). This species grows on tree trunks in the study area, in lowland rainforest, lower and upper montane rainforests, between 700–3000 m, in the Guatuso-Talamanca, Puntarenas-Chiriquí, Guajira, Magdalena, and Cauca provinces of the Pacific dominion. The record of C. holostipa occurring in the Páramo (Fig. 11), actually belongs to the Cauca province.
Notes:—This species can be recognized as small plants (<600 µm wide), with ventral merophytes 2 cells wide and underleaves distant and fully entire. The section Cyrtolejeunea is composed of two species in the Neotropics, C. holostipa and C. insecta; the latter species differs by a slightly bifid underleaf and the presence of bracteoles throughout the male spike (Bastos & Gradstein 2020) and does not occur in the study area.
Specimens examined:— BRAZIL. Pará: Capit „o Poço, 1°46’S, 47°4’W, 40 m, 15 September 2016, Tavares 1025 (RB). Rio de Janeiro: Rio de Janeiro, PARNA Tijuca, 22°57’28”S, 43°16’40”W, 446 m, 19 July 2016, Santos 551 (RB). Santa Catarina: Blumenau, Nova Rússia, 27°3’7”S, 49°5’16”W, 281 m, 17 November 2003, Costa 4687 (RB). COLOMBIA. Antioquia: Cocorna, 6°2’40.29”N, 75°7’46.46”W, 964 m, 19 August 2016, Ordoñez 251 (HUA); San Luis, 811 m, 12 June 2018, Carvajal 11 (HUA); Santo Domingo, January 2018, Ordoñez 625 (HUA). Cundinamarca: Ubalá, 754 m, 26 July 2018, Carmona s.n. (HUA). Magdalena: Santa Marta, Cuchilla de San Lorenzo, S. Winkler C227 (COL). Risaralda: El Pital, 4°51’N, 75°45’W, 1500 m, 8 November 1986, Wolf 1226 (COL). Santa Rosa de Cabal, 4°50’N, 75°31.5’W, 2740 m, 4 June 1986, Wolf 1572 (COL). ECUADOR. Loja: Loja, Parque Nacional Podocarpus, 2700 m, 11 November 2009, Gradstein 12261 (QCA). PANAMÁ. Chiriqui: Straβe von El Volcán, 8°49,67’ N, 82°42.85’ W, 1220 m, 3 April 2013, Schäfer-Verwimp & Werwimp 34702 (ALBC).
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 pages 94-95, DOI: 10.11646/phytotaxa.587.2.1, http://zenodo.org/record/7731813