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Open Access item A new genus and species of tree-climbing crab (Crustacea: Brachyura: Sesarmidae) from Taiwan with notes on its ecology and larval morphology

Authors:Schubart, Christoph D.
Liu, Hung-Chang
Cuesta, José A.
Keywords:Sesarmidae, Taxonomy, Morphology, Ecology, Zoea larva
Issue Date:30-Jun-2003
Publisher:National University of Signapore
Citation:Raffles Bulletin of Zoology 51(1): 49-59 (2003)
Abstract:A new genus and species of sesarmid crab, Scandarma lintou, is described from Taiwan. This crab has a semi-terrestrial habit: adults and juveniles thrive in ind-protected and vegetated habitats in close vicinity of fresh water and up to one kilometer from the sea. In southern Taiwan, this species was most commonly found hiding in leaf axils or climbing on the thorny leaves of the screw pine Pandanus odoratissimus Linnaeus. During the reproductive season (June to January), ovigerous females migrate to estuaries, where small and free-swimming pelagic larvae are released into the brackish waters and probably washed into the sea. Morphologically, this species is superficially similar to species of other semi-terrestrial sesarmid genera, but differs from these taxa by the shape of the anterolateral carapace region, by the markedly flattened fingers, by the presence of a row of tubercles on the dorsal border of the dactylus, a row of ventral spines on the pollex, and a granular ridge on the dorsal face of the palm. The first zoeal stage of the new genus shows two autapomorphies in the morphology of antennae and first maxillipeds. Otherwise, this stage presents the combination of features that are typical of sesarmid zoeae, i.e. absence of lateral carapace spines, a 2,3 setation of the maxillar endopod, a 2,2,3,3 setation on the basis of the first maxilliped, and a characteristic setation pattern of antennae and telson.
Description:11 páginas, 8 figuras.
Publisher version (URL):http://rmbr.nus.edu.sg/rbz/biblio/51/51rbz049-059.pdf
URI:http://hdl.handle.net/10261/48405
ISSN:0217-2445
Appears in Collections:(ICMAN) Artículos

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