© 2015 Adac. Tous droits réservés doi/10.7872/crya.v36.iss1.2015.55 Padina ditristromatica and Padina pavonicoides (Dictyotales, Phaeophyceae): two new records for the marine benthic flora of the Mediterranean Spanish coasts Antonio GÓMEZ GÓMEZ, Bernat PERALTA POCH, Francesc RIERA RIBAS, Amelia GÓMEZ GARRETA, M. Antonia RIBERA SIGUAN & Jordi RULL LLUCH * Laboratori de Botànica, Facultat de Farmàcia, Universitat de Barcelona. Av. Joan XXIII s/n, 08028 Barcelona, Spain Abstract – Padina distristromatica Ni-Ni-Win & H. Kawai and Padina pavonicoides Ni-Ni-Win & H. Kawai, two species recently described from the Mediterranean Sea, are reported for the first time from the coasts of the Iberian Peninsula, and the former also from the Balearic Islands. In this paper new data are provided for both species, especially cell dimensions. The indusium features, which are proposed as new taxonomical character for P. distristromatica, as well as the lack of stolon-like structures in this species, are considered useful features for distinguishing P. distristromatica from P. pavonica. A distribution map of both species in the Spanish coasts is also provided. Padina / Dictyotales / Phaeophyceae / Iberian Peninsula / Balearic Islands / Mediterranean Sea INTRODUCTION Padina pavonica (Linnaeus) Thivy is the type species of the genus Padina Adanson (Dictyotales, Phaeophyceae). Padina boergesenii Allender & Kraft, Padina boryana Thivy, Padina gymnospora (Kützing) Sonder, Padina tenuis Bory de Saint-Vincent and P. pavonica have been reported from the Mediterranean Sea (Cormaci et al., 2012). According to South & Skelton (2003) and Abbott & Huisman (2004) P. tenuis, a species widely cited on the Mediterranean (Nizamuddinn, 1981; Ribera et al., 1992), is a synonym of P. boryana. On the other hand, Ni-Ni-Win et al. (2011) described two new species, Padina distristromatica Ni-Ni-Win & H. Kawai and Padina pavonicoides Ni-Ni-Win & H. Kawai, from the Mediterranean Sea. These authors point out that the references of P. boryana and P. gymnospora from the Mediterranean Sea must correspond to misidentifications with P. boergesenii. Recently, Cormaci et al. (2012), according to Ni-Ni-Win et al. (2011), considered that the citations of P. boergesenii from the Mediterranean Sea must be misidentifications. Consequently, Cormaci et al. (2012) propose that * Corresponding author : jordirull@ub.edu Cryptogamie, Algologie, 2015, 36 (1): 55-63