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| - Shahdadi & Mendoza (2023)
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| dct:title
| - Shahdadi & Mendoza (2023)
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| dct:abstract
| - Two new species of the mangrove crab genus Leptarma Shahdadi, Fratini&Schubart, 2020, are described herein. Leptarma schubarti, new species, is described from Vanuatu and Palau, and is shown to have a close phylogenetic association to L. aurifrons (Li, Shih&Ng, 2019) from Taiwan. It differs significantly from L. aurifrons and other congeners in the structure of the first gonopod and vulva, which have a long, narrow apical corneous process, and a broadly oval operculum along the inner side with a distinct sternal cover, respectively. Leptarma bertrandi, new species, is described from the Loyalty Islands (New Caledonia), Vanuatu, and Taiwan. This species is shown to have both close morphological and genetic affinity to L. lenzii (De Man, 1895) from western Sumatra and the Cocos (Keeling) Islands, but can be distinguished from L. lenzii s. str. by several key morphological features including its live colour pattern. Compared to L. lenzii, L. bertrandi, new species, has proportionally longer ambulatory legs, fewer dactylar tubercles on the chelae, and the first gonopod has a shorter apical corneous process. Therefore, the number of recognised species of Leptarma now rises to 22, of which four occur in the oceanic islands of the Western Pacific. Present genetic analyses once again show that COX1 may not be the best marker for molecular taxonomy and species delimitation in this genus as it is not able to separate morphologically distinct species.
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| bibo:abstract
| - Two new species of the mangrove crab genus Leptarma Shahdadi, Fratini&Schubart, 2020, are described herein. Leptarma schubarti, new species, is described from Vanuatu and Palau, and is shown to have a close phylogenetic association to L. aurifrons (Li, Shih&Ng, 2019) from Taiwan. It differs significantly from L. aurifrons and other congeners in the structure of the first gonopod and vulva, which have a long, narrow apical corneous process, and a broadly oval operculum along the inner side with a distinct sternal cover, respectively. Leptarma bertrandi, new species, is described from the Loyalty Islands (New Caledonia), Vanuatu, and Taiwan. This species is shown to have both close morphological and genetic affinity to L. lenzii (De Man, 1895) from western Sumatra and the Cocos (Keeling) Islands, but can be distinguished from L. lenzii s. str. by several key morphological features including its live colour pattern. Compared to L. lenzii, L. bertrandi, new species, has proportionally longer ambulatory legs, fewer dactylar tubercles on the chelae, and the first gonopod has a shorter apical corneous process. Therefore, the number of recognised species of Leptarma now rises to 22, of which four occur in the oceanic islands of the Western Pacific. Present genetic analyses once again show that COX1 may not be the best marker for molecular taxonomy and species delimitation in this genus as it is not able to separate morphologically distinct species.
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| dct:issued
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| dct:bibliographicCitation
| - Shahdadi, A. & Mendoza, J. 2023. Two new species of the mangrove crab genus <em>Leptarma </em>(Crustacea: Brachyura: Sesarmidae) from the Western Pacific islands. <em>Raffles Bulletin of Zoology</em>, 71: 207-223.
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