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  • 1
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    Ultrastructure and histochemistry of the male reproductive system of the genus Callinectes Stimpson, 1860 (Brachyura: Portunidae)
    Wiley ; 2020
    In:  Journal of Morphology Vol. 281, No. 12 ( 2020-12), p. 1660-1678
    Details
    In: Journal of Morphology, Wiley, Vol. 281, No. 12 ( 2020-12), p. 1660-1678
    Abstract: We described the ultrastructure and histochemistry of the reproductive system of five Callinectes species, and evaluate the seasonal variation in weight of the reproductive system and hepatopancreas by comparing annual changes of somatic indices. The somatic indices changed little throughout the year. In Callinectes , spermatogenesis occurs inside the lobular testes and, within each lobule, the cells are at the same developmental stage. Spermatogenesis and spermiogenesis follow the same development pattern in all Callinectes studied. Mature spermatozoa are released into the seminiferous ducts through the collecting ducts. Cells of the vas deferens are secretory as evidenced by rough endoplasmic reticulum, Golgi complex, and secretory vesicles that produce the seminal fluid. The anterior vas deferens shows two portions: proximal and distal. In proximal portion (AVDp), spermatozoa are clustered and embedded in an electron‐dense, basophilic glycoproteinaceous secretion Type I. In the distal portion (AVDd), the spermatophore wall is formed by incorporation of a less electron‐dense glycoproteinaceous secretion Type II. The secretion Type I change to an acid polysaccharide‐rich matrix that separates the spermatophores from each other. The median vas deferens (MVD) stores the spermatophores and produces the granular glycoproteinaceous seminal fluid. The posterior vas deferens (PVD) has few spermatophores. Its epithelium has many mitochondria and the PVD seminal fluid changes into a liquid and homogeneous glycoprotein. Many outpocketings in the PVD and MVD help to increase the fluid production. Overall, the reproductive pattern of Callinectes is similar to other species that produce sperm plugs. The secretions of AVD, MVD, and PVD are responsible for the polymerization that forms the solid, waxy plug in the seminal receptacle. The traits identified here are common to all Portunidae species studied so far.
    Type of Medium: Online Resource
    ISSN: 0362-2525 , 1097-4687
    URL: Issue
    URL: Article
    DOI: 10.1002/jmor.v281.12
    DOI: 10.1002/jmor.21277
    Language: English
    Publisher: Wiley
    Publication Date: 2020
    detail.hit.zdb_id: 1479991-1
    SSG: 12
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  • 2
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    Ultrastructure of spermatozoa of spider crabs, family Mithracidae (Crustacea, Decapoda, Brachyura): Integrative analyses based on morphological and molecular data
    Wiley ; 2017
    In:  Journal of Morphology Vol. 278, No. 12 ( 2017-12), p. 1628-1646
    Details
    In: Journal of Morphology, Wiley, Vol. 278, No. 12 ( 2017-12), p. 1628-1646
    Abstract: Recent studies based on morphological and molecular data provide a new perspective concerning taxonomic aspects of the brachyuran family Mithracidae. These studies proposed a series of nominal changes and indicated that the family is actually represented by a different number and representatives of genera than previously thought. Here, we provide a comparative description of the ultrastructure of spermatozoa and spermatophores of some species of Mithracidae in a phylogenetic context. The ultrastructure of the spermatozoa and spermatophore was observed by scanning and transmission electron microscopy. The most informative morphological characters analysed were thickness of the operculum, shape of the perforatorial chamber and shape and thickness of the inner acrosomal zone. As a framework, we used a topology based on a phylogenetic analysis using mitochondrial data obtained here and from previous studies. Our results indicate that closely related species share a series of morphological characteristics of the spermatozoa. A thick operculum, for example, is a feature observed in species of the genera Amphithrax , Teleophrys , and Omalacantha in contrast to the slender operculum observed in Mithraculus and Mithrax . Amphithrax and Teleophrys have a rhomboid perforatorial chamber, while Mithraculus , Mithrax , and Omalacantha show a wider, deltoid morphology. Furthermore, our results are in agreement with recently proposed taxonomic changes including the separation of the genera Mithrax (previously Damithrax ), Amphithrax (previously Mithrax ) and Mithraculus , and the synonymy of Mithrax caribbaeus with Mithrax hispidus . Overall, the spermiotaxonomy of these species of Mithracidae represent a novel set of data that corroborates the most recent taxonomic revision of the family and can be used in future taxonomic and phylogenetic studies within this family.
    Type of Medium: Online Resource
    ISSN: 0362-2525 , 1097-4687
    URL: Issue
    URL: Article
    DOI: 10.1002/jmor.v278.12
    DOI: 10.1002/jmor.20737
    Language: English
    Publisher: Wiley
    Publication Date: 2017
    detail.hit.zdb_id: 1479991-1
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  • 3
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    Ultrastructure of spermatozoa of members of Calappidae, Aethridae and Menippidae and discussion of their phylogenetic placement
    Wiley ; 2020
    In:  Acta Zoologica Vol. 101, No. 1 ( 2020-01), p. 89-100
    Details
    In: Acta Zoologica, Wiley, Vol. 101, No. 1 ( 2020-01), p. 89-100
    Abstract: The families Aethridae and Calappidae were originally considered as part of the same family; however, their morphology and molecular biology separate them into two families. In this context, we describe the ultrastructure of spermatozoa of species of the Calappidae, Aethridae and Menippidae to elucidate the relationships among taxa. The vasa deferentia were submitted to routine protocols for transmission electron microscopy. Our results indicate that the morphology of the spermatozoa of Hepatus pudibundus supports its exclusion from the Superfamily Calappoidea due to the presence of the apical striated layer. The spermatozoa of Menippe nodifrons is very similar to H .  pudibundus and corroborates the recent phylogenetic analysis using sequence data of nuclear genes. Moreover, our results evidence two morphological patterns of spermatozoa within Calappidae. Calappa ocellata and C .  cinerea show spermatozoa with a wide acrosome vesicle, a thick operculum shaped as a shallow “W” and a large thickened ring. Calappa gallus and C .  hepatica show spermatozoa with a longer acrosome vesicle, a pointed operculum and a slender thickened ring. Our ultrastructure results conform with previous molecular proposal and show that spermatozoa ultrastructure can be an effective tool to adjust phylogenetic relationship when used in association with molecular data.
    Type of Medium: Online Resource
    ISSN: 0001-7272 , 1463-6395
    URL: Issue
    URL: Article
    DOI: 10.1111/azo.v101.1
    DOI: 10.1111/azo.12273
    RVK:
    WA 15000
    Language: English
    Publisher: Wiley
    Publication Date: 2020
    detail.hit.zdb_id: 2019873-5
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  • 4
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    From copula to fertilization: The reproduction of primitive crab Hypoconcha parasitica (Linnaeus, 1763) (Podotremata: Dromiidae)
    Wiley ; 2022
    In:  The Anatomical Record Vol. 305, No. 11 ( 2022-11), p. 3341-3355
    Details
    In: The Anatomical Record, Wiley, Vol. 305, No. 11 ( 2022-11), p. 3341-3355
    Abstract: This study describes the mating behavior of Hypoconcha parasitica under laboratory conditions highlighting the spermathecal morphology and focusing on the seminal fluid storage and release of spermatozoa. The pairs were kept in aquaria where the mating behavior was recorded and described. The spermathecae of the female were analyzed using scanning electron microscopy, X‐ray micro‐CT, histology, and histochemistry. No pre‐ or post‐copulatory mate guarding was observed in H. parasitica . The sperm transfer occurred with each pair maintaining the protection shield (bivalve shell) on their dorsum. The pair of spermathecae is covered exclusively by the cuticle, following the Podotremata pattern. Many muscle fiber bundles are attached to the cuticular wall facing toward the cephalothorax cavity, especially covering the lateral and slightly dorso‐anterior region toward the apodeme of Sternite 7. The spermathecal organization indicates that the process of sperm release during fertilization occurs through muscular action exerted by the female on the wall of the chamber. Thus, the musculature distribution in Hypoconchinae distinguishes them from described for other Podotremata such as Homolidae, which shows the musculature associated with the spermathecae aperture. Like the Homolidae, the first pleopod in H. parasitica seems to take part in the transfer/ movement of spermatozoa and oocytes between the sternum and abdomen, which forms a temporary chamber where fertilization occurs. In conclusion, the spermathecal morphology and associated structures bring new insights to the mechanisms involved in the sperm storage and fertilization of primitive crabs and how the Dromiidae spermatheca perform a new pattern among the poorly studied Podotremata.
    Type of Medium: Online Resource
    ISSN: 1932-8486 , 1932-8494
    URL: Issue
    URL: Article
    DOI: 10.1002/ar.v305.11
    DOI: 10.1002/ar.24920
    Language: English
    Publisher: Wiley
    Publication Date: 2022
    detail.hit.zdb_id: 2273240-8
    detail.hit.zdb_id: 2109216-3
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  • 5
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    Integrative depiction of the male reproductive system of the commercial purple crab Homalaspis plana (Platyxanthidae): Structure and function
    Wiley ; 2019
    In:  Journal of Morphology Vol. 280, No. 11 ( 2019-11), p. 1693-1705
    Details
    In: Journal of Morphology, Wiley, Vol. 280, No. 11 ( 2019-11), p. 1693-1705
    Abstract: The information available on structures and function of reproductive systems are female‐biased in many animal groups and crabs are not an exception. However, knowledge about the male reproductive system can help us to understand evolutionary and ecological processes such as the mating system and mating behavior. This study focuses on an integrative description of the principal regions of the male reproductive system of the purple crab, Homalaspis plana , a commercially exploited crab from the southeastern Pacific. For this description a combination of morphological observation, gravimetric records, histological and histochemical techniques and biochemical analysis were used. Also, a gross description of the seminal receptacle of the female was performed. The male reproductive system of H. plana was highly extended and complex, with a great capacity to produce and store spermatophores and secrete, at least, two kinds of seminal fluids. Sperm production, sperm packaging in spermatophores, storage of spermatophores and seminal liquid secretion were functions localized in specific regions. The vasosomatic index was the highest recorded to date in crabs, symptomatic of a high investment in reproduction. All these traits allow identification of H. plana as an internal sperm plug producer, which matches well with the highly extensible seminal receptacle of females. The great quantity of seminal material transferred to females during mating indicates that males may be able to mate only one time in the reproductive season and thus this species could be vulnerable to sperm depletion in males and sperm limitation in females if the fishery substantively reduced the abundance of males in the populations.
    Type of Medium: Online Resource
    ISSN: 0362-2525 , 1097-4687
    URL: Issue
    URL: Article
    DOI: 10.1002/jmor.v280.11
    DOI: 10.1002/jmor.21058
    Language: English
    Publisher: Wiley
    Publication Date: 2019
    detail.hit.zdb_id: 1479991-1
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  • 6
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    An integrative approach to the evolution of shrimps of the genus Palaemon (Decapoda, Palaemonidae)
    Wiley ; 2017
    In:  Zoologica Scripta Vol. 46, No. 4 ( 2017-07), p. 473-485
    Details
    In: Zoologica Scripta, Wiley, Vol. 46, No. 4 ( 2017-07), p. 473-485
    Abstract: Shrimps of the genus Palaemon Weber, 1795 comprise of 86 species with a wide morphological and ecological variability along the tropical and temperate regions. Studies based on molecular data have indicated that despite a recent taxonomic rearrangement, it may remain not monophyletic. On the other hand, cladistic, morphological analyses have suggested the presence of synapomorphies, implying a natural status for the genus. In this work, a broad taxonomic and molecular sampling is applied to verify whether Palaemon is a monophyletic taxon and, based on the recovered phylogeny, identify geographical and morphological patterns related to the lineages. Partial sequences of 16S rRNA , histone H3 and 18S rRNA from 60 species of Palaemon and 15 species from other genera of Palaemonidae were analysed. In addition, previously used characters as well as novel diagnostic characters were scrutinized. The present phylogeny indicates that the species of Palaemon fall into three distinct lineages and that the colonization of America and Europe likely occurred multiple times. Morphological characters allow for the identification of at least four monophyletic groups in Palaemon ; two of which are monospecific at the moment. Based on the present results, it may become necessary to establish two new genera (to accommodate Palaemon concinnus and Palaemon mercedae , respectively), as well as re‐erect the genus Alaocaris Holthuis, 1949 for Palaemon antrorum, potentially including a further six American species.
    Type of Medium: Online Resource
    ISSN: 0300-3256 , 1463-6409
    URL: Issue
    URL: Article
    DOI: 10.1111/zsc.2017.46.issue-4
    DOI: 10.1111/zsc.12228
    RVK:
    WA 15000
    Language: English
    Publisher: Wiley
    Publication Date: 2017
    detail.hit.zdb_id: 2022109-5
    detail.hit.zdb_id: 121103-1
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  • 7
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    A molecular and morphological approach on the taxonomic status of the Brazilian species of Palaemon (Decapoda, Palaemonidae)
    Wiley ; 2020
    In:  Zoologica Scripta Vol. 49, No. 1 ( 2020-01), p. 101-116
    Details
    In: Zoologica Scripta, Wiley, Vol. 49, No. 1 ( 2020-01), p. 101-116
    Abstract: Previous studies have indicated the occurrence of nine species of Palaemon in Brazil. However, the extensive variability in their diagnostic characters and the geographic distribution of some species raises doubts about the validity of some taxa, potentially indicating the occurrence of species not yet reported from Brazil or even not described. To solve taxonomic issues with Palaemon species in Brazil, we carried out a multigene analysis by using partial fragments of 16S and COI mitochondrial genes and the nuclear H3. Phylogenetic relationships were inferred by maximum likelihood and Bayesian inference. The external morphology corresponding to the terminal clades obtained in the molecular phylogram was analysed to identify diagnostic characters that allow the recognition of the groups and the correct taxa assignment. The combined analysis of molecular and morphological data confirms the existence of nine species of Palaemon in Brazil, five from the “ Palaemon ” lineage ( P. mercedae and four Palaemon stensu stricto — P. argentinus , P. octaviae— first record in Brazil , P. northropi and P. paivai ) and four of the “ Alaocaris ” lineage ( P. carteri, P. ivonicus, P. pandaliformis and P. yuna ). The possibility of further cryptic speciation is also pointed out. In addition to confirming the validity of the nine species, the results indicate the need for taxonomic adjustments and corresponding changes in the geographic distribution of Palaemon species occurring in Brazil.
    Type of Medium: Online Resource
    ISSN: 0300-3256 , 1463-6409
    URL: Issue
    URL: Article
    DOI: 10.1111/zsc.v49.1
    DOI: 10.1111/zsc.12394
    RVK:
    WA 15000
    Language: English
    Publisher: Wiley
    Publication Date: 2020
    detail.hit.zdb_id: 2022109-5
    detail.hit.zdb_id: 121103-1
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  • 8
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    Systematics of the shrimp genus Atya (Decapoda, Atyidae) in the light of multigene‐based phylogenetic and species delimitation inference
    Wiley ; 2021
    In:  Zoologica Scripta Vol. 50, No. 6 ( 2021-11), p. 780-794
    Details
    In: Zoologica Scripta, Wiley, Vol. 50, No. 6 ( 2021-11), p. 780-794
    Abstract: The Atya genus classification is mostly stabilized, comprising 13 species in the Americas and West Africa. However, nearly 40 years have passed since its last revision. Some taxonomic questions remained due to morphological uncertainty, and new ones have been raised with molecular Atyidae phylogenies. The aim of this study was to conduct the first Atya molecular systematic assessment, verifying the taxonomic status of A. gabonensis , A. innocous , A. margaritacea and A. scabra . Gene fragments (16S, COI and H3) were obtained by DNA sequencing and used for genetic distance, phylogeny and species delimitation analyses (ABGD, PTP and GMYC). Our data corroborate A. gabonensis as a species with amphi‐Atlantic distribution and suggest the use of A. innocous for specimens of the Caribbean Sea. We revalidated A. tenella Smith, 1871 for specimens from Pacific. Atya margaritacea , distributed along the Pacific coast of the Americas, was considered a valid and distinct species from A. scabra , which is distributed in the Atlantic and Pacific coasts of the Americas and West Africa; moreover, maybe this wide distribution belongs to a distinct species, being A. scabra restricted to "Gulf of Mexico lineage". We corroborated the genus as monophyletic and highlighted remaining systematic issues. Overall, our multigene‐based phylogeny and species delimitation analyses suggest that Atya comprises 14 species. This study provides data for future studies on the biodiversity, evolution and conservation of freshwater Atyidae shrimps and Neotropical fauna.
    Type of Medium: Online Resource
    ISSN: 0300-3256 , 1463-6409
    URL: Issue
    URL: Article
    DOI: 10.1111/zsc.v50.6
    DOI: 10.1111/zsc.12503
    RVK:
    WA 15000
    Language: English
    Publisher: Wiley
    Publication Date: 2021
    detail.hit.zdb_id: 2022109-5
    detail.hit.zdb_id: 121103-1
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  • 9
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    Demographic changes and life‐history strategies predict the genetic diversity in crabs
    Wiley ; 2023
    In:  Journal of Evolutionary Biology Vol. 36, No. 2 ( 2023-02), p. 432-443
    Details
    In: Journal of Evolutionary Biology, Wiley, Vol. 36, No. 2 ( 2023-02), p. 432-443
    Abstract: Uncovering what predicts genetic diversity (GD) within species can help us access the status of populations and their evolutionary potential. Traits related to effective population size show a proportional association to GD, but evidence supports life‐history strategies and habitat as the drivers of GD variation. Instead of investigating highly divergent taxa, focusing on one group could help to elucidate the factors influencing the GD. Additionally, most empirical data is based on vertebrate taxa; therefore, we might be missing novel patterns of GD found in neglected invertebrate groups. Here, we investigated the predictors of the GD in crabs (Brachyura) by compiling the most comprehensive cytochrome c oxidase subunit I (COI) available. Eight predictor variables were analysed across 150 species (16 992 sequences) using linear models (multiple linear regression) and comparative methods (PGLS). Our results indicate that population size fluctuation represents the most critical trait predicting GD, with species that have undergone bottlenecks followed by population expansion showing lower GD. Egg size, pelagic larval duration and habitat might play a role probably because of their association with how species respond to disturbances. Ultimately, K‐strategists that have undergone bottlenecks are the species showing lower GD. Some variables do not show an association with GD as expected, most likely due to the taxon‐specific role of some predictors, which should be considered in further investigations and generalizations. This work highlights the complexity underlying the predictors of GD and adds results from a marine invertebrate group to the current understanding of this topic.
    Type of Medium: Online Resource
    ISSN: 1010-061X , 1420-9101
    URL: Issue
    URL: Article
    DOI: 10.1111/jeb.v36.2
    DOI: 10.1111/jeb.14138
    RVK:
    WA 15000
    Language: English
    Publisher: Wiley
    Publication Date: 2023
    detail.hit.zdb_id: 92624-3
    detail.hit.zdb_id: 1465318-7
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  • 10
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    Integrated morphometric and molecular analyses indicate three male morphotypes in the freshwater prawn Macrobrachium olfersii (Decapoda, Palaemonidae) along the Brazilian neotropical region
    Wiley ; 2023
    In:  Acta Zoologica Vol. 104, No. 4 ( 2023-10), p. 538-551
    Details
    In: Acta Zoologica, Wiley, Vol. 104, No. 4 ( 2023-10), p. 538-551
    Abstract: Males of Macrobrachium olfersii have a large cheliped (second pereiopod) with individual variations in shape and ornamentation, and they vary in size within and between populations. Some misidentification or doubts about taxonomic validity occur due to this morphological variability throughout their geographic distribution. We carried out a morphometric analysis to detect specific patterns and the potential occurrence of morphotypes in M. olfersii from different populations. Our data set included 52 females and 109 males collected in the Neotropical region, between the north and south limits of Brazilian territory, in coastal rivers from the states of Rio Grande do Norte, Bahia, Espírito Santo, Rio de Janeiro, São Paulo, Paraná and Santa Catarina. Body measurements were size standardized by allometric methods and explored by the principal component analysis (PCA) and non‐hierarchical analysis of K‐means clustering and canonical variate analysis (CVA). Our results suggested three distinct morphological groups (morphotypes) only for males in M. olfersii . Furthermore, the confirmation of monophyly of the different populations of M. olfersii was accomplished by sequences of 16S rDNA. Additional studies about relative growth in other populations and the analysis of the entire ontogenetic development of males in the laboratory will be important to complement the knowledge about morphotypes in this species.
    Type of Medium: Online Resource
    ISSN: 0001-7272 , 1463-6395
    URL: Issue
    URL: Article
    DOI: 10.1111/azo.v104.4
    DOI: 10.1111/azo.12437
    RVK:
    WA 15000
    Language: English
    Publisher: Wiley
    Publication Date: 2023
    detail.hit.zdb_id: 2019873-5
    SSG: 12
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