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Endemism and evolution in the littoral woodlouse Halophiloscia Verhoeff, 1908 (Crustacea, Isopoda, Oniscidea) from the Canary Islands: implications for conservation policies

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1. The woodlouse genus Halophiloscia Verhoeff, 1908 includes littoral
halophilous species distributed along the coasts of the Mediterranean Sea, the
Atlantic coasts of Europe and northern Africa. The species Halophiloscia couchii has
been introduced to theAmericas, Hawaii and Australia. The Canary Islands harbour
four species, two of which are included in catalogues of endangered species.

2. One mitochondrial and one nuclear gene sequenced from over 100 specimens,
including outgroups, were analysed to infer the colonisation and diversification processes
of Halophiloscia in theCanary Islands and shed light on their conservation status.

3. The Canary Islands were independently colonised by three distinct Halophiloscia
lineages: (i) the endemic species H. rodriguezi, collected in several western
Canary Islands, and the troglobiomorphic H. microphthalma from La Palma, (ii)
the endemic H. canariensis, found throughout the eastern Canaries, and (iii) the
cosmopolitan H. couchii, present on Gran Canaria and Tenerife.

4. Halophiloscia microphthalma is not sister to the extant epigean Halophiloscia
species present on the same island, which together with the low levels of
genetic variability detected in the species may warrant a higher conservation
status than presently given.

5. The mitochondrial marker revealed a fine-scale phylogeographic structure in
H. canariensis, and rejected recent sharp declines in its population size, which in addition
to its widespread distribution challenge its consideration as an endangered species.

6. The presence of H. couchii in the archipelago is interpreted as a recent
introduction. Although no evidence of introgression was detected, more thorough
sampling and monitoring of introduced populations are recommended to
discard either hybridisation or competitive displacement of native species.

Key words. 28S rRNA, alien species, arthropod conservation, Bayesian skyline plots, cave life, cytochrome c oxidase (COI),molecular phylogenetics, phylogeography.

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Informasi Detail

Judul Seri

Insect Conservation and Diversity

No. Panggil

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Penerbit

London : The Royal Entomological Society., 2015

Deskripsi Fisik

Insect Conservation and Diversity (2015) 8, 17–30

Bahasa

English

ISBN/ISSN

doi: 10.1111/icad.12

Klasifikasi

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Tipe Isi

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Tipe Media

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Tipe Pembawa

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Edisi

Insect Conservation and Diversity

Subjek

ENTOMOLOGI

Info Detail Spesifik

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Pernyataan Tanggungjawab

agus

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Lampiran Berkas

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