TY - JOUR AU - Pupulin, Franco AU - Karremans, Adam P. AU - Belfort Oconitrillo, Noelia PY - 2017/08/17 Y2 - 2024/03/29 TI - Two new species of <i>Echinosepala</i> (Orchidaceae: Pleurothallidinae) JF - Lankesteriana: International Journal on Orchidology JA - LIJO VL - 17 IS - 2 SE - Articles DO - 10.15517/lank.v17i2.30205 UR - https://revistas.ucr.ac.cr/index.php/lankesteriana/article/view/30205 SP - AB - <p>We describe and illustrate two new species of&nbsp;<em>Echinosepala</em>&nbsp;from Costa Rica, they are placed within a phylogenetic framework of the genus, and compared to their closest relatives. A short resume of the genus’ history is given, reviewing the main characters that have been used to group its species at various taxonomic ranks.&nbsp;<em>Echinosepala expolita</em>&nbsp;is compared with&nbsp;<em>E. pan</em>, from which it mainly differs by the glabrous, inflated sheaths that cover the ramicaul, the distinctly broader ligulate-lanceolate leaves, the lanate-hirsute ovary, the much larger flower, and the tomentose abaxial indumentum of the sepals.&nbsp;<em>Echinosepala longipedunculata</em>&nbsp;is similar to&nbsp;<em>E. aspasicensis</em>, but can be recognized by the unusually long peduncle, the greenish yellow flower, the verrucose-tuberculate adaxial surface of the sepals, and the shorter, truncate, orange lip. A key to the Costa Rican species of&nbsp;<em>Echinosepala</em>&nbsp;is provided. A new combination in&nbsp;<em>Echinosepala</em>&nbsp;is proposed for&nbsp;<em>Acianthera biseta</em>&nbsp;from Peru.</p> ER -