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TWO SYMPATRIC SPECIES OF AXIUS FROM THE NORTH-WEST ATLANTIC (DECAPODA, THALASSINIDEA, AXIIDAE)

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[Axius serratus Stimpson, 1852, is redescribed and illustrated, and its distribution based on 54 records of 68 specimens is recorded. The sympatric, and rarely recorded Axius armatus Smith, 1881, is redescribed and illustrated for the first time, based on six female specimens from five separate records. These two species are compared with the eastern Atlantic Axius stirhynchus Leach, 1815. The three species can be separated on the basis of the uropodal transverse suture, telsonic and pereopodal spination, and pereopod 4 sternite structure.

Axius serratus Stimpson, 1852 est redécrit et illustré et sa répartition géographique est donnée, à partir de 54 signalements de 68 spécimens. L'espèce sympatrique Axius armatus Smith, 1881, rarement rencontrée, est redécrite et illustrée pour la première fois, à partir de six individus femelles provenant de cinq stations séparées. Ces deux espèces sont comparées avec Axius stirhynchus Leach, 1815, de l'Atlantique oriental. Les trois espèces peuvent être différenciées par la suture transversale de l'uropode, les épines du telson et des péréiopodes et enfin la structure du sternite du péréiopode 4., Axius serratus Stimpson, 1852, is redescribed and illustrated, and its distribution based on 54 records of 68 specimens is recorded. The sympatric, and rarely recorded Axius armatus Smith, 1881, is redescribed and illustrated for the first time, based on six female specimens from five separate records. These two species are compared with the eastern Atlantic Axius stirhynchus Leach, 1815. The three species can be separated on the basis of the uropodal transverse suture, telsonic and pereopodal spination, and pereopod 4 sternite structure.

Axius serratus Stimpson, 1852 est redécrit et illustré et sa répartition géographique est donnée, à partir de 54 signalements de 68 spécimens. L'espèce sympatrique Axius armatus Smith, 1881, rarement rencontrée, est redécrite et illustrée pour la première fois, à partir de six individus femelles provenant de cinq stations séparées. Ces deux espèces sont comparées avec Axius stirhynchus Leach, 1815, de l'Atlantique oriental. Les trois espèces peuvent être différenciées par la suture transversale de l'uropode, les épines du telson et des péréiopodes et enfin la structure du sternite du péréiopode 4.]

Affiliations: 1: Department of Systematic Biology, National Museum of Natural History, Smithsonian Institution, Washington, D.C. 20560, U.S.A.

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/content/journals/10.1163/15685400152682692
2001-10-01
2016-12-04

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