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New species and new records of Lithodid crabs (Crustacea, Decapoda, Lithodidae) from the Southwestern and Central Pacific Ocean.

Authors: Macpherson, Enrique;

New species and new records of Lithodid crabs (Crustacea, Decapoda, Lithodidae) from the Southwestern and Central Pacific Ocean.

Abstract

[FR]Nouvelles espèces et nouvelles occurrences des crabes lithodidés (Crustacea, Decapoda) dans l’océan Pacifique sud occidental et central. Six espèces de Lithodidae de Nouvelle-Calédonie, Vanuatu, Fidji et Polynésie française sont étudiées. Deux espèces nouvelles, Paralomis arae n. sp. et P. dawsoni n. sp., sont décrites. Quatre autres espèces, Lithodes richeri, Neolithodes brodiei, N. nipponensis et Neolithodes sp. sont signalées pour la première fois pour les localités étudiées. P. arae n. sp. a la surface de la carapace et l’abdomen avec de nombreux granules de tailles différentes et elle est caractérisée par la présence d’épines peu nombreuses sur la surface dorsale de la carapace et une épine proéminente dans la région gastrique. Les pattes ambulatoires sont relativement longues, garnies d’une série d’épines fortes sur les bords dorsal et ventral du mérus et propode. La plus proche espèce est P. verrilli du Pacifique nord-est (mer de Bering jusqu’à la Californie), mais elles se différencient par la forme et l’ornementation de la carapace et par la longueur des dactyles des pattes ambulatoires. P. dawsoni n. sp. a la carapace, l’abdomen et les péréiopodes couvertes par des groupes de granules de tailles différentes. Cette nouvelle espèce est proche de P. granulosa des côtes sud de l’Argentine et du Chili. Elles peuvent se distinguer par l’ornementation de la carapace, du scaphocerite et des péréiopodes et par la longueur des pattes ambulatoires.

[EN]Six species of lithodid crabs from New Caledonia, Vanuatu, Fiji and French Polynesia are studied. Two new species, Paralomis arae n. sp. and P. dawsoni n. sp., are described. Four other species, Lithodes richeri, Neolithodes brodiei, N. nipponensis and Neolithodes sp., are reported for the first time from these localities. P. arae n. sp. has the carapace and the abdomen surfaces covered with small granules of various size and it is characterized by the presence of few scattered spines on the dorsal surface of the carapace and a prominent central spine on the gastric region. The walking legs are moderately long, having well-developed spines along dorsal and ventral margins of merus and propodus. The closest species is P. verrilli from the northeastern Pacific (Bering Sea to California), but they are differentiated by the shape and armature of the carapace and the length of the dactylus of the walking legs. P. dawsoni n. sp. has the carapace, abdomen and pereiopods surfaces covered with clusters of rounded granules of different sizes. This new species is closely related to P. granulosa from the southern coasts of Argentina and Chile. Both species are easily distinguished by the armature of the carapace, scaphocerite and pereiopods and the length of the walking legs.

9 páginas , 4 figuras.

Peer reviewed

Keywords

Paralomis, Pacific Ocean, Neolithodes, Crustacea, Decapoda, Lithodes, Nouvelles espèces, Océan Pacifique, Lithodidae, New species

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This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
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popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
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influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
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impulse
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