The millipede genus Cylindroiulus Verhoeff, 1894 in north-west Spain and northern Portugal: Recent records and descriptions of four new species (Diplopoda, Julida, Julidae)

Recent collections of millipedes from north-west Spain and northern Portugal have yielded 11 species of the genus Cylindroiulus. Four species are described as new (C. anglilectus, C. boreoibericus, C. gregoryi, C. ventanaea), three species are new to Spain –C. britannicus (Verhoeff, 1891), C. fenestratus Read, 1989, C. dahli Demange, 1970– and two are recorded for the Iberian mainland for the first time having previously been found on the Atlantic islands: C. truncorum (Silvestri, 1896) in Portugal and C. dahli in Spain. Notes are given on the relationship between the new species and those previously described, including those endemic to the Madeiran archipelago. A key to species likely to be found in the northwest of the Iberian pensinsula is presented. Recientes recolecciones de miriápodos del noroeste de Espa a y norte de Portugal han permitido obtener 11 especies del género Cylindroiulus. Se describen cuatro nuevas especies (C. anglilectus, C. boreoibericus, C. gregoryi, C. ventanaea), tres nuevas citas para Espa a –C. britannicus (Verhoeff, 1891), C. fenestratus Read, 1989, C. dahli Demange, 1970–, y dos especies son citadas por primera vez en la Península Ibérica, tras haber sido previamente descritas en islas atlánticas: C. truncorum (Silvestre, 1896) en Portugal y C. dahli en Espa a. Se incluyen notas sobre relaciones de las especies nuevas con otras previamente descritas, incluidas algunas endémicas del archipiélago de Madeira. Se presenta una clave de especies de probable aparición en el noroeste de la Peninsula Iberica.