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      Nuevos registros de cangrejos ermitaños (Crustacea: Decapoda: Paguroidea) del Santuario Islas de Bahía Chamela, Jalisco, México: con comentarios sobre el uso de conchas vacías como hábitat Translated title: New records of hermit crabs (Crustacea: Decapoda: Paguroidea) from Chamela Bay Islands Sanctuary, Jalisco, Mexico: with comments about the use of empty shells as habitat

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          Abstract

          Se identificaron 12 especies de cangrejos ermitaños del material recolectado en la bahía Chamela, Jalisco. La familia Diogenidae fue la mejor representada con 7 especies. Nueve especies representan registros nuevos para la bahía y 2 pertenecientes al género Paguristes se descubrió que no han sido descritas. Se encontró asociación de los cangrejos ermitaños con conchas de 29 especies de gasterópodos que utilizaban como habitáculo; las conchas más comunes fueron Cantharus sanguinolentus (Duclos, 1833) y Mancinella speciosa (Valenciennes, 1832).

          Translated abstract

          Twelve species of hermit crabs were identified from material recollected in Chamela Bay, Jalisco. The family Diogenidae was the best represented with 7 species. Nine species represent new records for Chamela Bay and 2 species of the genus Paguristes were found to be undescribed. We found an association of hermit crabs with shells used as home in 29 gastropods; the commonest shells used were Cantharus sanguinolentus (Duclos, 1833) and Mancinella speciosa (Valenciennes, 1832).

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          Sea shells of tropical West America

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            The Behavioral Mechanisms Underlying Shell Selection By Hermit Crabs1)

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              Hermit to king, or hermit to all: multiple transitions to crab-like forms from hermit crab ancestors.

              The Anomura presents the greatest degree of morphological disparity in the decapod Crustacea, with body forms ranging from the symmetrical and asymmetrical hermit crabs to squat lobsters and king crabs. The phylogeny of the anomurans has been fraught with controversy. Recent debate has focused primarily on the phenomenon of carcinization, the evolution of crab-like form from a non-crab-like ancestor, focused chiefly on derivation of king crabs from asymmetrical hermit crabs--the "hermit to king" hypothesis. We show by phylogenetic analysis of five nuclear protein-coding gene sequences that hermit crabs have a single origin, but surprisingly, that almost all other major clades and body forms within the Anomura, are derived from within the hermit crabs. The crab-like form and squat lobster form have each evolved at least twice from separate symmetrical hermit crab ancestors. In each case, a carcinization trend can be posited via a transition series from the initial symmetrical long-tailed hermit crab form, through the intermediate squat lobster or asymmetrical hermit crab form, to the final crab-like form. Adaptation to dextral shell habitation evolved at least twice, once in an exclusively deep-water clade and once in the common ancestor of all other asymmetrical hermit crabs (from which king crabs are derived). These remarkable cases of parallelism suggest considerable phenotypic flexibility within the hermit crab ground plan, with a general tendency toward carcinization. Rather than having a separate origin from other major clades, hermit crabs have given rise to most other major anomuran body types.
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                Author and article information

                Contributors
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Journal
                rmbiodiv
                Revista mexicana de biodiversidad
                Rev. Mex. Biodiv.
                Instituto de Biología (México )
                2007-8706
                September 2013
                : 84
                : 3
                : 782-791
                Affiliations
                [1 ] Universidad de Guadalajara Mexico
                [2 ] Universidad Nacional Autónoma de México Mexico
                Article
                S1870-34532013000300007
                10.7550/rmb.32505
                d50f4788-3b29-412c-a54a-128d32524bb1

                http://creativecommons.org/licenses/by/4.0/

                History
                Categories
                Biodiversity Conservation

                Animal science & Zoology
                gastropod shells,supralittoral,intertidal,subtidal,diversity,Mexican Pacific,conchas de gasterópodos,supralitoral,intermareal,submareal,diversidad,Pacífico mexicano

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