Morphological and morphometric appraisal of the spermatophore of the southern hermit crab Isocheles sawayai (Anomura: Diogenidae), with comments on gonopores in both sexes

Mantelatto, Fernando L.; Scelzo, Marcelo A.; Tudge, Christopher C.

doi:10.1016/j.jcz.2008.06.002

Cited by 16 publications

(25 citation statements)

References 16 publications

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“…The external morphology of the lateral ridge in Petro chirus diogenes is also similar to that observed in other species of Diogenidae, including Calcinus (Mantelatto et al 2009a) and Diogenes pugilator (Tirelli et al 2008). In these species, the lateral ridge consists of a thickening of the wall of the ampulla at the border along which the 2 valves are joined.…”

Section: Spermatophoressupporting

confidence: 76%

“…We selected 15 males covering the widest possible range of sizes. All procedures followed the protocols described by Scelzo et al (2004Scelzo et al ( , 2010, Amadio & Mantelatto (2009) and Mantelatto et al (2009a).…”

Section: Methodsmentioning

confidence: 99%

“…Comparisons of reproductive morphology are a taxonomic tool, providing key characters for species delimitation, solving taxonomic problems and establishing phylogenetic relationships between groups of crustaceans (Mantelatto et al 2009a, Fantucci & Mantelatto 2011. Recently, studies based on electron microscopy have intensified interest in morphological analyses of the re productive structures of decapod crustaceans, especially in males (Manjón-Cabeza & García-Raso 2000, Amadio & Mantelatto 2009).…”

Section: Introductionmentioning

confidence: 99%

“…The production of these structures is habitat-related, and in marine species, the spermatophores appear to reduce spermatozoal loss (Subramoniam 1993). In addition, spermato phores provide an energy-rich substrate, allowing for spermatozoal storage over long periods (Subramoniam 1991, Scelzo et al 2004, Mantelatto et al 2009a.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Reproductive apparatus of the male giant hermit crab Petrochirus diogenes (Anomura, Diogenidae): morphology and phylogenetic implications

Buranelli¹,

Mantelatto²

2012

Aquat. Biol.

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Section: Spermatophoressupporting

confidence: 76%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Reproductive apparatus of the male giant hermit crab Petrochirus diogenes (Anomura, Diogenidae): morphology and phylogenetic implications

Buranelli¹,

Mantelatto²

2012

Aquat. Biol.

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“…Recent eVorts to improve knowledge of the hermit crabs of Brazilian waters have revealed important and relevant aspects of I. sawayai in terms of biogeography, systematics , biology and reproduction (Fantucci et al 2007(Fantucci et al , 2008Mantelatto et al 2009), such as intersexuality. We used this species as a model to evaluate morphological parameters as instruments to establish the size at which sexual maturity occurs, and to evaluate the presence of sexual dimorphism.…”

Section: Introductionmentioning

confidence: 99%

Use of pleopod morphology to determine sexual dimorphism and maturity in hermit crabs: Isocheles sawayai as a model

2009

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In the Anomura, studies on growth patterns are infrequent, possibly because the heterogeneity of the group, especially in terms of morphology, makes it diYcult to construct generalized growth models. Particularly hermit crabs are an interesting group to evaluate aspects of growth, because of their unique body. Isocheles sawayai, a hermit crab found only in the western Atlantic Ocean, poorly known with respect to its sexual dimorphism and maturity, was investigated here based on morphometry. Monthly collections (July 2001 through June 2003) were made from a shrimp Wshing boat in the Caraguatatuba region on the northern coast of the state of São Paulo, Brazil. The specimens were measured and weighed, and had their sex checked. Throughout the sampling period, 374 specimens of I. sawayai were collected (11.23% nonovigerous females, 6.69% ovigerous females, 79.41% males and 2.67% intersexes). The size at which morphological sexual maturity was reached by both sexes ranged from 4.0 to 4.3 mm shield length, according to the relative growth and the size of the smallest ovigerous female. Sexual dimorphism was shown by males, which were signiWcantly larger than females, and by diVerences in growth pattern between the sexes, especially for relationships that involved the pleopods, which is related to their diVerent functions in males and females. The present study is one of the Wrst to use pleopod morphometry to determine sexual maturity and dimorphism in hermit crabs, especially for species with intersexuality such as I. sawayai.

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Male reproductive apparatus and spermatophore morphology of the hermit crabs Pagurus brevidactylus and P. criniticornis (Anomura, Paguridae)

Fantucci

Mantelatto

2011

Journal of Morphology

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Spermatozoa of most crustacean species are nonmotile and are packed into spermatophores. In Decapoda, spermatophores are highly variable in morphology and can be useful in the solving of taxonomic and systematic questions, especially among the Anomura. In this study, the morphology and morphometry of the spermatophores of the western Atlantic hermit crabs Pagurus brevidactylus and P. criniticornis are described. The abdomen of fresh male specimens was dissected to expose the reproductive system and to extract the spermatophores, which were analyzed by stereoscopic, light, and scanning electron microscopy. The vas deferens can be divided macroscopically in three regions, all of them containing spermatophores. Tripartite spermatophores are composed of an elongated cylindrical main ampulla, a triangular accessory ampulla, a narrow cylindrical peduncle, and a round pedestal. Dimensions of the spermatophore components are positively correlated to the size of the crab. Morphological patterns observed in this study resemble those of other pagurid hermit crabs investigated to date. The morphological character distribution confirms classifications based on adult morphology and molecular analysis.

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Morphological and morphometric appraisal of the spermatophore of the southern hermit crab Isocheles sawayai (Anomura: Diogenidae), with comments on gonopores in both sexes

Cited by 16 publications

References 16 publications

Reproductive apparatus of the male giant hermit crab Petrochirus diogenes (Anomura, Diogenidae): morphology and phylogenetic implications

Reproductive apparatus of the male giant hermit crab Petrochirus diogenes (Anomura, Diogenidae): morphology and phylogenetic implications

Use of pleopod morphology to determine sexual dimorphism and maturity in hermit crabs: Isocheles sawayai as a model

Male reproductive apparatus and spermatophore morphology of the hermit crabs Pagurus brevidactylus and P. criniticornis (Anomura, Paguridae)

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