Pignal Marc, Yockteng Roxana, Hearn David J. & Labat Jean-Noel, 2013 — Adenia barthelatii (Passifloraceae), a new endemic species of Mayotte and its phylogenetic status within the genus Adenia. Phytotaxavol. 99, n° 1, p. 40-48
Pignal Marc, Romaniuc-Neto Sergio, De Souza Sidnei, Chagnoux Simon & Lange Canhos Dora Ann, 2013 — Saint-Hilaire virtual herbarium, a new upgradeable tool to study Brazilian botany. Adansoniavol. 35, n° 1, p. 7-18
Pignal Marc, Soares Filho Avaldo de Oliveira & Romaniuc Neto Sergio, 2013 — A new species of Neea Ruiz & Pav. (Nyctaginaceae) from the Atlantic Forest of Bahia State (Brazil). Adansoniavol. 35, n° 1, p. 19-31