Check List 12(3): e19510, doi: 10.15560/12.3.1908
Dracontium nivosum (Lem.) G.H.Zhu (Araceae): range extension from Amazonia to a brejo forest refugium in Northeast Brazil confirmed
expand article infoIvanilza M. de Andrade‡, M. Francilene S. Silva§, Thales A. Ribeiro|, Simon J. Mayo
‡ Universidade Federal do Piauí, Herbário Delta do Parnaíba-HDELTA, Campus Ministro Reis Velloso, Av. São Sebastião 2819, CEP 64202-020, Parnaíba, PI, Brazil, Brazil§ Universidade Federal do Ceará-UFC, NPDM-LOE, Núcleo de Pesquisa e Desenvolvimento de Medicamentos (NPDM), Laboratório de Oncologia Experimental (LOE), Porangabussu, Rua Coronel Nunes de Melo 1000, CEP 60430-275, Fortaleza, CE, Brazil, Brazil| Universidade Estadual Vale do Acaraú - UVA, Curso de Ciências Biológicas, Av. da Universidade, Campus Betânia, Sobral, CE, Brazil, Brazil¶ Honorary Research Associate, Herbarium, Royal Botanic Gardens Kew, Kew Green, Richmond, Surrey TW9 3AE, United Kingdom, United Kingdom

Corresponding author: Simon Mayo ( simonjosephmayo@gmail.com )

© 2017 Ivanilza de Andrade, M. Francilene Silva, Thales Ribeiro, Simon Mayo.
This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Citation: Mayo S, de Andrade I, Ribeiro T, Silva M (2016) Dracontium nivosum (Lem.) G.H.Zhu (Araceae): range extension from Amazonia to a brejo forest refugium in Northeast Brazil confirmed. Check List 12(3): 1908. https://doi.org/10.15560/12.3.1908
Open Access
Abstract
The 558 km range extension of the Amazonian aroid Dracontium nivosum (Lem.) G.H.Zhu into semi-arid Northeast Brazil is confirmed. This species occurs in Ceará in threatened fragments of brejo forest at ca. 580–870 m elevation. An illustrated taxonomic description is provided. The species’  Extent of Occurrence (EOO) is estimated as 356,392 km2 (meets Least Concern); the Area of Occupancy (AOO), 60 km2 using a 2×2 km cell (Endangered). Within Ceará the EOO is 41.4 km2 (Critically Endangered) and the AOO is 16 km2 (Endangered). 
Keywords
Chapada da Ibiapaba; range extension; threatened forest fragments; semi-arid Neotropics; conservation status; spatial analysis; Ceará