No abstract

The occurrence of the carpet weed Galenia secunda (L. fil.) Sond. (Aizoaceae) has been reported in Southern Spain. G. secunda is a prostrate perennial species native to South Africa. In this paper, the current distribution of G. secunda and the main habitats invaded in Southern Spain, are reported. The distribution survey revealed an area of occupancy of 92 ha and an extent of occurrence of 14,250 ha for this species, thus suggesting an early stage of invasion. Since the first citation of this species in Spain (1965), our current data (2007) support a rapid spread and invasiveness of G. secunda as a result of an intense rate of coastal development. G. secunda was more often found near roads, because roads facilitate seed dispersal. G. secunda also appeared in other coastal natural habitats such as sand dunes, where G. secunda forms dense monospecific mats. Studies on its invasion potential and impacts in natural habitats are recommended and control measures should be developed to prevent future expansion.

Se documentan los primeros registros de Ipomoea imperati (Vahl) Griseb. (Convolvulaceae) en la provincia de Cádiz. Esta especie rizomatosa y rastrera es nativa de Norteamérica y se ha encontrado formando poblaciones naturalizadas incipientes (entre 300 - 750 m2 ) en playas de los municipios de Barbate y Algeciras. Ipomoea imperati coloniza en ambos casos dunas móviles con diferente grado de desarrollo. El origen de la introducción es incierto. La evaluación del riesgo sugiere un riesgo alto de invasión, pudiendo extenderse la invasión sobre hábitats de interés comunitario.

A new species of jumping spider, Phlegra blaugrana sp. nov., is described (♂♀, Cádiz Province, Spain). Phlegra nitidiventris Lucas, 1846 is redescribed, and the female is described for the first time. Phlegra sapphirina Thorell, 1875 syn. nov. is synonymized with P. nitidiventris. A distribution map for P. blaugrana sp. nov. and P. nitidiventris is provided, and elements of the courtship behaviour of P. blaugrana sp. nov. are described.

Español.  Se documentan los primeros registros de Ipomoea imperati (Vahl) Griseb. (Convolvulaceae) en la provincia de Cádiz. Esta especie rizomatosa y rastrera es nativa de Norteamérica y se ha encontrado formando poblaciones naturalizadas incipientes (entre 300 - 750 m2 ) en playas de los municipios de Barbate y Algeciras. Ipomoea imperati coloniza en ambos casos dunas móviles con diferente grado de desarrollo. El origen de la introducción es incierto. La evaluación del riesgo sugiere un riesgo alto de invasión, pudiendo extenderse la invasión sobre hábitats de interés comunitario. English. The first records of Ipomoea imperati (Vahl) Griseb (Convolvulaceae) in the province of Cádiz are documented. This rhizomatous and creeping species is native to North America. I. imperati was found as incipient naturalized populations (between 300-750 m2) on beaches from Barbate and Algeciras municipalities. In both cases, I. imperati colonizes shifting (yellow) dunes with different levels of development. The origin of the introduction is uncertain. The risk assessment resulted in a high risk of invasion of habitats of Community interest