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Spatial distribution of Madeira Island Laurisilva endemic spiders (Arachnida: Araneae)
Publication . Crespo, Luís C.; Boieiro, Mário; Cardoso, Pedro; Aguiar, Carlos A. S.; Amorim, Isabel R.; Barrinha, Carla; Borges, Paulo A. V.; Menezes, Dilia; Pereira, Fernando E. A.; Rego, Carla; Ribeiro, Sérvio P.; Silva, Israel F.; Serrano, Artur R. M.
Madeira island presents a unique spider diversity with a high number of endemic species, many of which are still poorly known. A recent biodiversity survey on the terrestrial arthropods of the native forest, Laurisilva, provided a large set of standardized samples from various patches throughout the island. Out of the fifty two species recorded, approximately 33.3% are Madeiran endemics, many of which had not been collected since their original description. Two new species to science are reported – Ceratinopsis n. sp. and Theridion n. sp. – and the first records of Poeciloneta variegata (Blackwall, 1841) and Tetragnatha intermedia Kulczynski, 1891 are reported for the first time for Madeira island. Considerations on species richness and abundance from different Laurisilva locations are presented, together with distribution maps for endemic species. These results contribute to a better understanding of spider diversity patterns and endemic species distribution in the native forest of Madeira island.
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