Genetic Differentiation between Unionicola formosa and U. foili (Acari: Unionicolidae): Cryptic Species of Molluscan Symbionts

Edwards, Dale D.; Dimock, Ronald V.

doi:10.2307/3226976

Cited by 18 publications

(13 citation statements)

References 30 publications

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“…Most species are obligate mussel symbionts, and use host tissues, including the gills (gill mites), or mantle and foot (mantle mites) as sites of oviposition (Vidrine 1996a). A taxonomic treatise of North American Unionicola mussel-mites (Vidrine 1996b), along with behavioral (LaRochelle and Dimock 1981; Edwards and Dimock 1995) and population genetic studies (Edwards and Dimock 1997;Edwards et al 1998) for a limited number of species of mussel-mites from North America suggests that the evolution of Unionicola mites is closely tied to the evolutionary history of their hosts. However, a thorough understanding of this interplay awaits well-supported phylogenies of both mussels and their Unionicola symbionts.…”

Section: Introductionmentioning

confidence: 99%

Mitochondrial genome sequence of Unionicola parkeri (Acari: Trombidiformes: Unionicolidae): molecular synapomorphies between closely-related Unionicola gill mites

et al. 2011

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The mitochondrial genome of Unionicola parkeri is a 14,734 bp circular DNA molecule. The sequence and annotation revealed a unique gene order, related to but distinct from the gene order in the closely related species U. foili. Mitochondrial tRNA sequences annotated in this genome predict non-canonical secondary structures for these molecules. The continuing patterns of unique gene orders and unusual tRNA structures in the Trombidiformes in general and Unionicola in particular support the use of phylogenetic approaches that use these types of molecular features as shared, derived character states. Further progress in using these molecular character states to reconstruct phylogeny will depend on careful annotation, especially of tRNA genes.

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Section: Introductionmentioning

confidence: 99%

Mitochondrial genome sequence of Unionicola parkeri (Acari: Trombidiformes: Unionicolidae): molecular synapomorphies between closely-related Unionicola gill mites

et al. 2011

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“…The genetic findings of Edwards and Dimock (1997) resulted in the designation of a new species within the subgenus Uriioiiicola, U. foili Edwards and Vidrine, 1994. There are 5 known species of Uiiioriicola from the subgenus Diriiockatar Vidrine, 1992, four of which occur in North America in association with anodontine bivalve molluscs (Vidrine, 1986b). Morphological differences among species from this subgenus are minor and based primarily on the number and relative size of clawlets on the palpal tarsus.…”

Section: Introductionmentioning

confidence: 98%

“…Interestingly, an examination of allozyme variation (Edwards and Dimock, 1997) and heterogeneity in the sequence data of the mitochondria1 cytochrome oxidase subunit I (~0 .~1 ) gene (Emsting et nl.,…”

Section: Introductionmentioning

confidence: 99%

Genetic Differences Among Sibling Species of the SubgenusDimockatax(Acari: Unionicolidae:Unionicola): Heterogeneity in Dna Sequence Data Supports Morphological Differentiation

Ernsting

Edwards

Vidrine

et al. 2008

International Journal of Acarology

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Water mites of the subgenus Diniockatax (Unionicolidae: U I I~O I~~C O~)are common inhabitants of anodontine bivalve molluscs. Morphological differences among the five species that comprise the subgenus are minor and based primarily on subtle differences in one or two characters. The newly described species Uiiionicola eriutiiigi (Edwards et al., 2008) is distinguished from its sibling species U. ttnsida (Wolcott, 1898) by the number of clawlets on the tarsus of the pedipalps. These mites have been reported from the same locality, although they inhabit distinct species of host mussels. Uiiioriicola eriistirtgi occurs with Anodontoides radiatis (Conrad, 1834), and U. ttrniida is found in association with Strophitin subvexis (Conrad, 1834). Taxonomic delineations among U I~~O I I~C O~~ mussel-mites parasitizing different species of hosts have, however, been challenged by the suggestion that morphological differences between mites may be influenced by the host species in which they metamorphosed. To test the validity ofthe species status for Dirnockatnu mites from A . radiatus and S. strbvexirs, heterogeneity in sequence data of the cox1 gene was examined. A comparison of cox1 sequences for U. tirniida from S. subveriis and U. eriistirigi from A. radiatirs revealed a high degree of differentiation (12.7%). The genetic differences observed for U. erristirtgi and U. tirirtida are consistent with those observed for other closely related, yet morphologically distinct species of Uiiioiiicola reported from different species of host mussel and thus complement morphological data recognizing them as valid species.

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“…Addressing evolutionary relationships among species of Unionicola within subgenera using morphological criteria may prove to be problematical for at least two reasons. First, morphological differences among species that comprise subgenera are often comparatively minor, making it rather difficult to delineate species on the basis of morphological characters (Vidrine, 1996b;Edwards and Dimock, 1997). Second, there have been suggestions that morphological characters that have been used to distinguish between certain species of Unionieola (e.g., species from the subgenus Unionicolides Lundblad 1937) are plastic and influenced by the host species in which these Table 1.…”

Section: Introductionmentioning

confidence: 98%

Phylogenetic relationships among species of the subgenusParasitatax(Acari: Unionicolidae:Unionicola) based on DNA sequence of the mitochondrial cytochrome oxidase i gene

Ernsting

Edwards

Vidrine

et al. 2006

International Journal of Acarology

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Morphological differences among species of parasitic water mites in subgenus Parasitatax (Unionicolidae: Unionicola) are comparatively minor, with taxonomic distinctions among most members of the taxon based on subtle differences in one or two morphological characters. Two species of the subgenus, Unionicolaformosa Dana and Whelpley, 1836 and U. foili Edwards and Vidrine, 1994 are morphologically indistinguishable and have been designated separate species on the basis of host specificity and allozyme analysis. The present study examines heterogeneity in sequence data of the mitochondrial cytochrome oxidase subunit I (COI) gene among four putative species of the subgenus Parasitatax: U. dimocla" Vidrine, 1986, U.foili, U.formosa, and U. ypsilophora Bonz, 1783. Because populations of U.formosa from different species of host mussels are genetically divergent, intraspecific diversity of the COI gene among host-associated populations of U. formosa was also examined. DNA sequence data was used to construct a phylogenetic hypothesis for the group and assess the degree to which a phylogeny based on molecular data is consistent with traditional taxonomy. Maximum parsimony and maximum likelihood analysis each yielded a single tree with the same topology and high bootstrap support. The gene tree indicates two major clades, with U. dimocki and U. ypsilophora forming one clade and U. foili along with host-associated populations of U.formosa forming the other. The latter clade resolved into two branches and indicated that one host-associated population of U. formosa is more closely related to U. foili than it is to other host-associated populations of U. formosa.

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Genetic Differentiation between Unionicola formosa and U. foili (Acari: Unionicolidae): Cryptic Species of Molluscan Symbionts

Cited by 18 publications

References 30 publications

Mitochondrial genome sequence of Unionicola parkeri (Acari: Trombidiformes: Unionicolidae): molecular synapomorphies between closely-related Unionicola gill mites

Mitochondrial genome sequence of Unionicola parkeri (Acari: Trombidiformes: Unionicolidae): molecular synapomorphies between closely-related Unionicola gill mites

Genetic Differences Among Sibling Species of the SubgenusDimockatax(Acari: Unionicolidae:Unionicola): Heterogeneity in Dna Sequence Data Supports Morphological Differentiation

Phylogenetic relationships among species of the subgenusParasitatax(Acari: Unionicolidae:Unionicola) based on DNA sequence of the mitochondrial cytochrome oxidase i gene

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