Molecular Evolution of the Small Subunit Ribosomal DNA in Woodlice (Crustacea, Isopoda, Oniscidea) and Implications for Oniscidean Phylogeny

Mattern, Dominik; Schlegel, Martin

doi:10.1006/mpev.2000.0861

Cited by 34 publications

(25 citation statements)

References 41 publications

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“…This hypothesis is in accordance with the results of recent studies that have shown that, within Oniscidea, the morphological series is not a phylogenetic one (Hoese, 1982) and that lungs evolved independently (Ferrara et al, 1994;Mattern and Schlegel, 2001). …”

Section: Discussionsupporting

confidence: 90%

Morphology and evolution of the respiratory apparatus in the family Eubelidae (Crustacea, Isopoda, Oniscidea)

Paoli¹,

Ferrara²,

Taiti³

2002

Journal of Morphology

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The morphology of the respiratory apparatus in the pleopodal lungs of the family Eubelidae was investigated. The family is a monophyletic group including more than 240 species in 53 genera (three of which are nomina dubia), mostly distributed in the Afrotropical Region (tropical Africa and Arabian Peninsula). In all the Eubelidae, except for the monospecific genus Parelumoides and two species of the genus Elumoides, the exopods of pleopods have lungs. All the pulmonary morphologies present in the entire suborder Oniscidea are found: 1) uncovered lungs, composed of a pleated respiratory surface, directly exposed to the air (Atracheodillo-type) or partially enclosed within the appendage (Synarmadilloides-type); 2) covered lungs with several spiracles and respiratory trees, housed within the appendages, with spiracles surrounded by a specialized, nonrespiratory, structure (perispiracular area) (Eubelum- and Somaloniscus-types); 3) covered lungs with only one spiracle, with or without perispiracular area, and one respiratory tree (Aethiopopactes- and Periscyphis-types), which in taxa with Periscyphis-type lung crosses the insertion of the appendage and penetrates into the pleon with bundles of respiratory tubules. The evolution of the various types of lungs is discussed. It is concluded that the two main evolutionary lines, i.e., uncovered lungs and covered lungs, originated independently from an ancestral respiratory structure-the semilunar area. A first mechanism of development of the semilunar area by folding of its surface produced the Atracheodillo-type (all folds coplanar with the surface of the exopod) and Synarmadilloides-type (folds partly coplanar and partly intraflexed inside the exopod) uncovered lungs. A second mechanism of development by tubular invagination of the cuticle of the semilunar area produced the polyspiracular Eubelum-type lungs (numerous arborescent invaginations) and the monospiracular Aethiopopactes-type lungs (only one arborescent invagination), probably passing through a common intermediate pattern. From the common pattern, both the poly- and monospiracular types would have inherited the characteristic concave cell arrangement of the perispiracular area. The Somaloniscus-type and Periscyphis-type lungs are forms specialized for arid environments, directly derived from the Eubelum-type and Aethiopopactes-type, respectively.

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Section: Discussionsupporting

confidence: 90%

Morphology and evolution of the respiratory apparatus in the family Eubelidae (Crustacea, Isopoda, Oniscidea)

Paoli¹,

Ferrara²,

Taiti³

2002

Journal of Morphology

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“…However, transitions of sex chromosomes are difficult to establish due to the lack of a robust phylogenetic framework. Two studies have so far attempted to reconstruct molecular phylogenies of some terrestrial isopod species 29, 30 , but both yielded poorly resolved trees owing to the small number of markers used and the relatively low amount of phylogenetic signal contained in these markers. Here, we investigated the diversity and evolution of sex determination systems in terrestrial isopods in two steps: (i) we reconstructed the first fully-resolved molecular phylogeny of terrestrial isopods, and (ii) we assessed heterogametic systems in terrestrial isopod species using experimental procedures.…”

Section: Introductionmentioning

confidence: 99%

Diversity and evolution of sex determination systems in terrestrial isopods

Becking

Giraud

Raimond

et al. 2017

Sci Rep

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Sex determination systems are highly variable in many taxa, sometimes even between closely related species. Yet the number and direction of transitions between these systems have seldom been characterized, and the underlying mechanisms are still poorly understood. Here we generated transcriptomes for 19 species of terrestrial isopod crustaceans, many of which are infected by Wolbachia bacterial endosymbionts. Using 88 single-copy orthologous genes, we reconstructed a fully resolved and dated phylogeny of terrestrial isopods. An original approach involving crossings of sex-reversed individuals allowed us to characterize the heterogametic systems of five species (one XY/XX and four ZW/ZZ). Mapping of these and previously known heterogametic systems onto the terrestrial isopod phylogeny revealed between 3 and 13 transitions of sex determination systems during the evolution of these taxa, most frequently from female to male heterogamety. Our results support that WW individuals are viable in many species, suggesting sex chromosomes are at an incipient stage of their evolution. Together, these data are consistent with the hypothesis that nucleo-cytoplasmic conflicts generated by Wolbachia endosymbionts triggered recurrent turnovers of sex determination systems in terrestrial isopods. They further establish terrestrial isopods as a model to study evolutionary transitions in sex determination systems and pave the way to molecularly characterize these systems.

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“…Molecular techniques may offer an alternative approach to elucidating their higher-level relationships and, potentially, their relationships to the free-living isopods. Molecular studies involving sequence analyses of several regions (12S and 16S LSU mitochondrial rDNA, COI mitochondrial DNA, and 18S SSU rDNA) have proven useful in elucidating other isopod phylogenies (Held, 2000;Mattern & Schlegel, 2001;Wetzer, 2001Wetzer, , 2002Raupach et al, 2004;Wetzer et al, 2013), but few examples of epicarideans have been included in past studies.…”

Section: Introductionmentioning

confidence: 99%

A molecular phylogeny of Bopyroidea and Cryptoniscoidea (Crustacea: Isopoda)

Boyko

Moss

Williams

et al. 2013

Systematics and Biodiversity

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Epicaridean isopods are parasitic on other crustaceans. They represent a diverse group of highly derived taxa in two superfamilies and 10 families. Little work has been done on the phylogeny of these parasites because of the difficulty in defining homologous characters for adults above the genus level. The females exhibit morphological reduction of characters and the males have few distinguishing characters. Moreover, epicarideans have only rarely been included in past studies of isopod phylogeny. Our objective was to derive a phylogeny of epicaridean taxa based on 18S rDNA, then use that phylogeny to examine the relationships of the bopyrid subfamilies, bopyroid families and epicarideans to cymothoid isopods. We tested the monophyly of the Epicaridea, evaluated hypotheses on relationships among epicaridean families and subfamilies, examined the evolution of the abdominal mode of infestation on caridean, gebiidean, axiidean and anomuran hosts and examined coevolution between epicarideans and their crustacean hosts. The molecular phylogeny indicated that Epicaridea were monophyletic with respect to Cymothooidea. Bopyroidea formed a monophyletic group without Dajidae and Entophilinae (now as Entophilidae). Both latter taxa grouped with Cryptoniscoidea, and this group was the sister taxon to the redefined Bopyroidea in all trees. The bopyrid subfamily Ioninae is the sister taxon to the other bopyrid subfamilies (except Entophilidae). Ioninae was elevated to family status but found not to be monophyletic; a new subfamily, Keponinae, was erected for all genera formerly placed in Ioninae except the type genus. The abdominal mode of parasitism appears to have evolved independently among the subfamilies. Coevolution between host and parasite phylogenies showed extensive incongruence, indicating frequent host-switching as a general pattern in Epicaridea.http://www.zoobank.org/urn:lsid:zoobank.

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Molecular Evolution of the Small Subunit Ribosomal DNA in Woodlice (Crustacea, Isopoda, Oniscidea) and Implications for Oniscidean Phylogeny

Cited by 34 publications

References 41 publications

Morphology and evolution of the respiratory apparatus in the family Eubelidae (Crustacea, Isopoda, Oniscidea)

Morphology and evolution of the respiratory apparatus in the family Eubelidae (Crustacea, Isopoda, Oniscidea)

Diversity and evolution of sex determination systems in terrestrial isopods

A molecular phylogeny of Bopyroidea and Cryptoniscoidea (Crustacea: Isopoda)

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