Croton maranonensis: a new species of Euphorbiaceae from the tropical inter-Andean dry valleys

Martín-Muñoz J.; Silva E.C.E.; Gonzáles P.; Muñoz-Sánchez Á.; Cumbicus N.; Goodwin Z.; Meira R.M.S.A.; Riina R. · European Journal of Taxonomy (2024) · DOI: 10.5852/ejt.2024.947.2639

Resumen

We describe Croton maranonensis Riina & Martín-Muñoz sp. nov., a species in Croton section Julocroton (Mart.) G.L.Webster from the seasonally dry tropical forests and shrublands of the inter-Andean valleys. This species is a small shrub occurring along the Marañón river valley in Peru and similar dry areas in southern Ecuador. We surveyed morpho-anatomical characters of the new species and closely related taxa. To confi rm the placement of the new species in C. section Julocroton, we conducted a molecular phylogenetic analysis including three accessions of the new species and selected representatives of section Julocroton and related groups within Croton L. Micro- and macromorphological evidence, and molecular data support C. maranonensis sp. nov. as an independent lineage within the C. section Julocroton clade. We compared the new species with morphologically similar species in the same section that also occur in the Andean region, including C. fl avispicatus Rusby, C. triqueter Lam., and C. hondensis (H.Karst.) G.L. Webster.

Instituciones: Universidad Nacional Mayor de San Marcos