The life and adventures of an eight-legged castaway: Colonization and diversification of Philisca ghost spiders on Robinson Crusoe Island (Araneae, Anyphaenidae)

Oceanic archipelagoes, by their young origin and isolation, provide privileged settings to study the origin and diversification of species. Here, we study the anyphaenid spider genus Philisca, endemic to the Valdivian temperate rainforest, which includes species living both on the mainland as well a...

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Detalles Bibliográficos
Autores principales:	Soto, Ignacio M., Labarque, Facundo Martín, Ramírez, Martín Javier
Publicado:	2017
Materias:	Biogeography Phylogenetic Rapid diversification Robinson Crusoe Island Spiders animal classification ecosystem geography island (geological) phylogeny spider statistical model Animals Ecosystem Geography Islands Likelihood Functions Phylogeny
Acceso en línea:	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10557903_v107_n_p132_Soto http://hdl.handle.net/20.500.12110/paper_10557903_v107_n_p132_Soto
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	paper:paper_10557903_v107_n_p132_Soto
record_format	dspace
spelling	paper:paper_10557903_v107_n_p132_Soto2025-07-30T18:39:07Z The life and adventures of an eight-legged castaway: Colonization and diversification of Philisca ghost spiders on Robinson Crusoe Island (Araneae, Anyphaenidae) Soto, Ignacio M. Labarque, Facundo Martín Ramírez, Martín Javier Biogeography Phylogenetic Rapid diversification Robinson Crusoe Island Spiders animal classification ecosystem geography island (geological) phylogeny spider statistical model Animals Ecosystem Geography Islands Likelihood Functions Phylogeny Spiders Oceanic archipelagoes, by their young origin and isolation, provide privileged settings to study the origin and diversification of species. Here, we study the anyphaenid spider genus Philisca, endemic to the Valdivian temperate rainforest, which includes species living both on the mainland as well as on the Robison Crusoe Island in the Juan Fernández archipelago. Anyphaenids, as many spiders, are potentially good colonizers due their ability for ballooning, an airborne dispersal mediated by strands of silk that are caught in the wind. We use a molecular approach to estimate both the phylogenetic relationships and the timeframe of species diversification of Philisca, with the aim to infer its evolutionary history. We further estimate the rates of speciation on both the insular and continental Philisca species and score the microhabitat used by each species and their sizes as a proxy to evaluate ecological niche diversification within the island. Most analyses support the monophyly of Philisca, with the exclusion of Philisca tripunctata. Our results reveal colonization from a single lineage that postdated the origin of the island, followed by rapid (∼2 Ma) diversification. The ancestral microhabitat was most likely leaf-dwelling but we identify two independent microhabitat shifts. Our data provides evidence that Philisca has undergone an adaptive radiation on the Robison Crusoe Island. © 2016 Elsevier Inc. Fil:Soto, E.M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Labarque, F.M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Ramírez, M.J. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2017 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10557903_v107_n_p132_Soto http://hdl.handle.net/20.500.12110/paper_10557903_v107_n_p132_Soto
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Biogeography Phylogenetic Rapid diversification Robinson Crusoe Island Spiders animal classification ecosystem geography island (geological) phylogeny spider statistical model Animals Ecosystem Geography Islands Likelihood Functions Phylogeny Spiders
spellingShingle	Biogeography Phylogenetic Rapid diversification Robinson Crusoe Island Spiders animal classification ecosystem geography island (geological) phylogeny spider statistical model Animals Ecosystem Geography Islands Likelihood Functions Phylogeny Spiders Soto, Ignacio M. Labarque, Facundo Martín Ramírez, Martín Javier The life and adventures of an eight-legged castaway: Colonization and diversification of Philisca ghost spiders on Robinson Crusoe Island (Araneae, Anyphaenidae)
topic_facet	Biogeography Phylogenetic Rapid diversification Robinson Crusoe Island Spiders animal classification ecosystem geography island (geological) phylogeny spider statistical model Animals Ecosystem Geography Islands Likelihood Functions Phylogeny Spiders
description	Oceanic archipelagoes, by their young origin and isolation, provide privileged settings to study the origin and diversification of species. Here, we study the anyphaenid spider genus Philisca, endemic to the Valdivian temperate rainforest, which includes species living both on the mainland as well as on the Robison Crusoe Island in the Juan Fernández archipelago. Anyphaenids, as many spiders, are potentially good colonizers due their ability for ballooning, an airborne dispersal mediated by strands of silk that are caught in the wind. We use a molecular approach to estimate both the phylogenetic relationships and the timeframe of species diversification of Philisca, with the aim to infer its evolutionary history. We further estimate the rates of speciation on both the insular and continental Philisca species and score the microhabitat used by each species and their sizes as a proxy to evaluate ecological niche diversification within the island. Most analyses support the monophyly of Philisca, with the exclusion of Philisca tripunctata. Our results reveal colonization from a single lineage that postdated the origin of the island, followed by rapid (∼2 Ma) diversification. The ancestral microhabitat was most likely leaf-dwelling but we identify two independent microhabitat shifts. Our data provides evidence that Philisca has undergone an adaptive radiation on the Robison Crusoe Island. © 2016 Elsevier Inc.
author	Soto, Ignacio M. Labarque, Facundo Martín Ramírez, Martín Javier
author_facet	Soto, Ignacio M. Labarque, Facundo Martín Ramírez, Martín Javier
author_sort	Soto, Ignacio M.
title	The life and adventures of an eight-legged castaway: Colonization and diversification of Philisca ghost spiders on Robinson Crusoe Island (Araneae, Anyphaenidae)
title_short	The life and adventures of an eight-legged castaway: Colonization and diversification of Philisca ghost spiders on Robinson Crusoe Island (Araneae, Anyphaenidae)
title_full	The life and adventures of an eight-legged castaway: Colonization and diversification of Philisca ghost spiders on Robinson Crusoe Island (Araneae, Anyphaenidae)
title_fullStr	The life and adventures of an eight-legged castaway: Colonization and diversification of Philisca ghost spiders on Robinson Crusoe Island (Araneae, Anyphaenidae)
title_full_unstemmed	The life and adventures of an eight-legged castaway: Colonization and diversification of Philisca ghost spiders on Robinson Crusoe Island (Araneae, Anyphaenidae)
title_sort	life and adventures of an eight-legged castaway: colonization and diversification of philisca ghost spiders on robinson crusoe island (araneae, anyphaenidae)
publishDate	2017
url	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10557903_v107_n_p132_Soto http://hdl.handle.net/20.500.12110/paper_10557903_v107_n_p132_Soto
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The life and adventures of an eight-legged castaway: Colonization and diversification of Philisca ghost spiders on Robinson Crusoe Island (Araneae, Anyphaenidae)

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