Phytotaxa 345 (3): 219–271 ISSN 1179-3155 (print edition) http://www.mapress.com/j/pt/ PHYTOTAXA Copyright © 2018 Magnolia Press Article ISSN 1179-3163 (online edition) https://doi.org/10.11646/phytotaxa.345.3.2 The genus Agaricus in the Caribbean. Nine new taxa mostly based on collections from the Dominican Republic LUIS A. PARRA1, CLAUDIO ANGELINI2,3, BEATRIZ ORTIZ-SANTANA4, GERARDO MATA5, CHRISTOPHE BILLETTE6, CARLOS ROJO7, JIE CHEN8 & PHILIPPE CALLAC6* 1 Avda. Padre Claret 7, 5º G, 09400 Aranda de Duero, Burgos, Spain. 2 Jardín Botánico Nacional Dr. Rafael Ma. Moscoso, Apartado 21-9, Santo Domingo, Dominican Republic. 3 Via Cappuccini 78/8, 33170 Pordenone, Italia. 4 US Forest Service, Northern Research Station, Center for Forest Mycology Research, One Gifford Pinchot Drive, Madison, Wisconsin 53726, USA. 5 Instituto de Ecología, A. C., Apartado Postal 63, 91000 Xalapa, Veracruz, Mexico. 6 INRA, MycSA, CS 20032, 33882 Villenave d’Ornon CEDEX, France 7 Biotecnología Forestal Aplicada (IdForest), Calle Curtidores 17, 34004 Palencia, Palencia, Spain. 8 AV7 1715, Córdoba Centro, 94500 Córdoba, Veracruz, Mexico. * Corresponding author:
[email protected] Abstract Field collections of Agaricus were collected in the Dominican Republic from 2009–2016 with the intent to evaluate the diversity in this genus, which was quasi-unknown in this country. In the same period, studies on tropical Agaricus revealed tropical clades that remained unclassified. A new taxonomic system of classification was developed, with the aim, inter alia, to integrate such tropical clades. A recent phylogenetic study, which included some samples from the Dominican Republic, revealed they belonged to three putative new sections.