TY - JOUR A1 - Barberá, Patricia A1 - Lachenaud, Olivier A1 - Riina, Ricarda T1 - A new species of Paranecepsia (Euphorbiaceae-Acalyphoideae) from Madagascar and its relationships among the 'alchorneoids clade' T2 - European journal of taxonomy N2 - The formerly monotypic genus Paranecepsia Radcl.-Sm. is expanded with the description and illustration of a second species, Paranecepsia andrafiabensis Barberá & O.Lachenaud sp. nov. Molecular phylogenetic analyses of plastid rbcL and trnL-F data confirm a sister relationship between the new species and P. alchorneifolia Radcl.-Sm., as members of the alchorneoids clade. Paranecepsia andrafiabensis sp. nov. is notable for expanding the character states for the genus (now including both 2- and 3-locular ovary species) and broadening the geographic range of the genus from continental Africa to Madagascar. The new species adds to the diverse karst limestone endemics of northwestern Madagascar, where it has a very restricted distribution at the base of the western wall of the Ankarana tsingy. An amended generic description of Paranecepsia and a key to the species are also presented. Paranecepsia andrafiabensis sp. nov. is provisionally assessed as VU D1 based on the IUCN Red List criteria. T3 - European journal of taxonomy : EJT - 834:22-37 KW - Alchorneeae KW - Ankarana KW - Africa KW - Madagascar KW - tsingy Y1 - 2022 UR - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/68762 UR - https://nbn-resolving.org/urn:nbn:de:hebis:30:3-687625 SN - 2118-9773 VL - 2022 IS - 834 SP - 22 EP - 37 PB - Muséum National d'Histoire Naturelle CY - Paris ER -