Dacryopinax (Fungi: Dacrymycetales) in Mexico Author Castro-Santiuste, Sandra 0000-0002-7923-1957 Laboratorio de Biogeografía y Sistemática, Departamento de Biología Evolutiva, Facultad de Ciencias, Universidad Nacional Autónoma de México, Ciudad Universitaria, Av. Universidad 3000, Coyoacán, 04510, Mexico City, Mexico santiuste@ciencias.unam.mx Author Sierra, Sigfrido 0000-0002-9006-4088 Laboratorio de Taxonomía de Hongos Tremeloides (Heterobasidiomycetes), Departamento de Biología Comparada, Facultad de Ciencias, Universidad Nacional Autónoma de México, Ciudad Universitaria, Av. Universidad 3000, Coyoacán, 04510, Mexico City, Mexico ssg@ciencias.unam.mx Author Guzmán-Dávalos, Laura 0000-0002-4390-3678 Laboratorio de Micología, Departamento de Botánica y Zoología, Universidad de Guadalajara, Apdo. Postal 1 - 131, 45101, Zapopan, Jal., Mexico laura.guzman@academicos.udg.mx Author Cifuentes, Joaquín 0000-0003-2842-3278 Laboratorio de Biodiversidad y Taxonomía de Hongos, Departamento de Biología Comparada, Facultad de Ciencias, Universidad Nacional Autónoma de México, Ciudad Universitaria, Av. Universidad 3000, Coyoacán, 04510, Mexico City, Mexico joaquinc873@gmail.com Author Evans, Thomas 0000-0002-2541-5099 Laboratorio de Micología, Departamento de Botánica y Zoología, Universidad de Guadalajara, Apdo. Postal 1 - 131, 45101, Zapopan, Jal., Mexico thomas.e.evans93@gmail.com Author Martínez-González, César Ramiro 0000-0002-0256-0840 Laboratorio de Biogeografía y Sistemática, Departamento de Biología Evolutiva, Facultad de Ciencias, Universidad Nacional Autónoma de México, Ciudad Universitaria, Av. Universidad 3000, Coyoacán, 04510, Mexico City, Mexico ramiro_mg.unam@ciencias.unam.mx Author Sizzo, Hernán Alvarado- 0000-0001-7291-0917 Laboratorio de Biogeografía y Sistemática, Departamento de Biología Evolutiva, Facultad de Ciencias, Universidad Nacional Autónoma de México, Ciudad Universitaria, Av. Universidad 3000, Coyoacán, 04510, Mexico City, Mexico halvarado@iies.unam.mx Author Luna-Vega, Isolda 0000-0002-7243-9018 Laboratorio de Biogeografía y Sistemática, Departamento de Biología Evolutiva, Facultad de Ciencias, Universidad Nacional Autónoma de México, Ciudad Universitaria, Av. Universidad 3000, Coyoacán, 04510, Mexico City, Mexico luna.isolda@gmail.com text Phytotaxa 2020 2020-05-26 446 1 6 22 http://dx.doi.org/10.11646/phytotaxa.446.1.2 journal article 10.11646/phytotaxa.446.1.2 1179-3163 13877819 Dacryopinax lowyi S. Sierra & Cifuentes (2005: 244) . Figs. 1b and 3 Basidiome up to 35 mm long, pileate-stipitate, gelatinous-cartilaginous, reddish gold (6C7) when young, with grayish orange tones (6B4), apricot (5B6), raw sienna (6D7), to brick red (7D6) when mature; with age becoming brownish orange (7C5). Pileus 2–35 mm in diameter, spathulate to cupulate, mature specimens with lobulate margin; sterile side velutinous under magnifying lens. Stipe 2–25 × 3–10 mm , cylindrical, eccentric, velutinous under magnifying lens. Hymenium unilateral on the internal side of the cup, smooth, occasionally papillate. Basidiospores 13–17 × 5.6–7.5 µm, Q = 2.2–2.7, ellipsoid to oblong or obovoid, some lacrymoid or phaseoliform, aseptate to transversally triseptate, with thin septum, hyaline to yellowish, guttulate, smooth, thin-walled; germination by conidia of 2–3 × 1.4–2 µm, subglobose. Probasidia 53–77 (–82.5) × 2.5–4.5 µm, cylindrical, hyaline to yellowish, guttulate. Metabasidia 58–76 (–84) × 3–5 µm, cylindrical, hyaline, guttulate; sterigmata 19–35 × 2–4.5 µm, cylindrical, with attenuate apex, becoming bifurcate, hyaline, guttulate. Elements from the sub-abhymenium (bulbous hyphae) 25–42 × 15–25 µm, globose to subglobose forming chains, hyaline to yellowish, thick-walled, purple in phloxine. Marginal hyphae (hairs) from abhymenium and stipe up to 100 × 6 µm, cylindrical, thick-walled; content purple in phloxine. Specimens examined:— MEXICO . Mexico City : Delegation Milpa Alta , 4.5 km NW of Tlaloc volcano, 3156 m , 19°07’22’’ N , 99°03’31’’ W , 26 August 2015 , S. Castro-Santiuste 295 ( FCME 27543 !) ; highest elevation of El Tulmiac , 19°08’11’’ N , 99°06’58’’ W , 19 June 2015 , A. Gutiérrez-Sánchez 122 ( FCME 27544 !) ; El Tulmiac , 19°07’44’’ N , 99°07’02’’ W , 8 August 2013 , D. Guzmán-Ramírez 9–10 (FCME 27546! – 27617!) ; Manitas Pintadas , 19°08’45’’ N , 99°04’59’’ W , 9 September 2015 , A. Gutiérrez-Sánchez 109 ( FCME 27545 !) ; 2 km NW of Ocusacayo volcano, 19°09’16’’ N , 99°04’49’’ W , 19 September 2008 , S. Sierra 2008–33 ( FCME 27547 !) ; Atlimeya , slopes of Tlaloc volcano, 16°06’58’’ N , 99°03’18’’ W , 14 August 2009 , S. Sierra 2009–8 ( FCME 27548 !) ; 6 September 2012 , S. Sierra 2012–16 ( FCME 27549 !) ; Delegation Tlalpan , km 32 highway Mexico City-Cuernavaca , near the Morelos state limit, 2900 m , 19°11’18’’ N , 99°9’52’’ W , 21 July 1968 , G. Guzmán 6753 (ENCB!) ; Mezontepec , San Miguel Ajusco , 19°09’59’’ N , 99°16’03’’ W , 28 September 2016 , A. Gutiérrez-Sánchez 232 ( FCME 27550 !). State of Mexico : Municipality of Amanalco de Becerra , km 39 highway Toluca-Amanalco-Valle de Bravo , settlement of Agua Bendita , 2750 m , 19°15’50’’ N , 99°56’25’’ W , 7 June 1990 , S. Sierra 14 ( FCME 3184 !). Municipality of Amecameca , km 14 highway Amecameca-Tlamacas , near Barranca de Ameyalco , 19°04’00’’ N , 98°41’23’’ W , 15 July 1993 , S. Sierra 165 ( FCME 20406 !) ; Municipality of Ixtapaluca , Zoquiapan Station , 19°17’18’’ N , 98°41’08’’ W , 26 September 2015 , A. Gutiérrez-Sánchez 100 & 107 (FCME 27551, 27618!) ; 24 September 2016 , S. Sierra 16–63 ( FCME 27552 !) ; Municipality of Jalatlaco , km 11 highway Jalatlaco-Ajusco , 19°11’21’’ N , 99°20’28’’ W , 3 August 1988 , L. Pérez-Ramírez 901 ( FCME 4562 !) ; Municipality of Ocuilan , Lagunas de Zempoala , 3 km W of Sta. Martha , 3100 m , 19°3’45’’ N , 99°23’50’’ W , 18 September 1977 , C. Flores s/n (ENCB!) ; Laguna Quila , 2490 m , 19°2’54’’ N , 99°19’3’’ W , 26 September 1996 , S. Sierra 625 ( FCME 20407 !) ; Municipality of Salazar , Cerro Cabezas , 3100 m , 19°18’10’’ N , 99°21’4’’ W , 9 September 1962 , M. Ruiz-Oronoz s/n (LSUM!) ; Municipality of Temascaltepec , km 54 highway Toluca-Temascaltepec , deviation towards El Polvorín , 2200 m , 19°5’43’’ N , 99°58’26’’ W , 23 July 1988 , A. Pompa-González 44 ( FCME 14317 !) ; highway Toluca-Temascaltepec , deviation towards La Peñuela , 3000 m , 19°10’34’’ N , 99°51’3’’ W , 23 July 1982 , G. Guzmán 21680 (ENCB!). Michoacán : Municipality of Angangueo , behind the station of the Reserva Especial de la Biósfera Mariposa Monarca , 18°39’46’’ N , 100°16’03’’ W , 21 July 2000 , S. Sierra 773 ( holotype , FCME 17489 !) ; Llano de Las Papas , 19°34’37’’ N , 100°15’53’’ W , 15 July 1999 , S. Sierra 725 & 728 (FCME! 17025, 17020!) ; 4August 1999 , S. Sierra 733 ( FCME 17014 !) ; Llano Villalobos , 19°40’10’’ N , 100°16’24’’ W , 12 September 1998 , E. Pellicer- González 81 ( FCME 15079 !) ; 26 September 1998 , S. Sierra 698 ( FCME 15030 !) ; Municipality of Ciudad Hidalgo , km 186 highway Toluca-Morelia , 19°45’38’’ N , 100°47’40’’ W , 29 July 1983 , E. Paez Aguirre s/n ( FCME 11569 !) ; Municipality of Zinapécuaro, Zona de Protección Forestal Los Azufres , Laguna Larga , 19°47’60’’ N , 100°41’08’’ W , 3 July 1987 , C. Núñez-Mariel s/n ( FCME 13863 !). Morelos : Municipality of Huitzilac, Parque Nacional Lagunas de Zempoala , near the Ojotongo lagoon, 3000 m , 19°3’9’’ N , 99°18’41’’ W , 28 June 1967 , G. Guzmán 5728 (ENCB!) ; Tres Marías , at the edge of the highway, in a small cedar forest, 2750 m , 19°2’36’’ N , 99°14’5’’ W , 7 August 1968 , G. Guzmán 6901 (ENCB!). Tlaxcala : Municipality of Tlaxco, Parque Recreativo El Rodeo , cerro El Peñón , 2800 m , 19°39’56’’ N , 98°12’44’’ W , 14 August 1992 , S. Sierra 96 ( FCME 4847 !) . Habit, habitat, and distribution:—Gregarious to fasciculate, on decaying wood, in Abies , Abies-Pinus , and Cedrus forests, at an elevation higher than 3000 m , from July to September. Known from Mexico City , Michoacán , Morelos , State of Mexico , and Tlaxcala . Remarks:—This species shares the presence of vesicles in the sub-abhymenium with D. primogenitus and D. yungensis , differing in the size of the basidiospores ( D. primogenitus 8.5–10 × 3–3.5 µm, D. yungensis 10–13 × 5–6 µm) and the length of basidia (23–49 µm in D. primogenitus ; 28–46 µm in D. yungensis ). The last two species mentioned have been collected in angiosperm forests (Lowy 1961, Pérez-Silva & Esqueda-Valle 1992 ; McLaughlin et al . 2016 ), whereas D. lowyi has only been reported in coniferous forests ( Abies , Pinus , and Juniperus ) ( Sierra & Cifuentes 2005 ). This latter species presents a limited distribution within Mexico , commonly found only in the Trans- Mexican Volcanic Belt, which is an area of great complexity, both environmentally as well as in its origins, containing over 30 different types of climate, and predominantly conifer forests ( Espinosa & Ocegueda 2007 ).