Vesicomyinae (Bivalvia: Vesicomyidae) of the Kuril–Kamchatka Trench and adjacent abyssal regions

Krylova, Elena M.; Kamenev, Gennady M.; Vladychenskaya, Irina P.; Петров, Н. Б.

doi:10.1016/j.dsr2.2014.10.004

Cited by 20 publications

(13 citation statements)

References 24 publications

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“…(identified here as Vesicomya sp. 2; or Vesicomyinae, as previously noted by Krylova et al (2015)). Although a late Cretaceous to early Cenozoic origin of symbiotrophic pliocardiins is not surprising, the implication that they arose from deep-sea-dwelling ancestors stands in contrast to the evolutionary polarities seen in other vent and seep species that typically radiated, or re-radiated, from shallow-water ancestors (Vrijenhoek, 2013).…”

Section: Discussionmentioning

confidence: 55%

“…The only known genus, Vesicomya Dall 1886, uniting 15 species, occurs worldwide at 400-10,730 m depths in trenches and deep oceanic basins characterized by high inputs of sediment and refractory organic matter (Krylova, Kamenev, Vladychenskaya, & Petrov, 2015). Although stable isotope data suggest that chemoautotrophy does not contribute significantly to their nutrition, it remains unclear whether Vesicomya host chemosymbiotic bacteria (Krylova & Sahling, 2010, and unpubl.…”

Section: Introductionmentioning

confidence: 99%

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Phylogeny and origins of chemosynthetic vesicomyid clams

Johnson

Krylova

Audzijonytė

et al. 2016

Systematics and Biodiversity

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Large vesicomyid clams (Veneroida: Vesicomyidae: Pliocardiinae) are prominent members of the communities associated with sulphide-rich deep-sea habitats. Taxonomic uncertainties within the Pliocardiinae result from both plasticity in shell morphologies and the common occurrence of cryptic species. Molecular taxonomic studies have now clarified many species-level assignments and provided DNA-barcodes for more than 50 species worldwide. Nonetheless, genus-level assignments remain uncertain, because the existing COI barcode sequences are not sufficient for identifying higher-level groupings. To construct a robust phylogeny for this subfamily, we conducted a combined Bayesian analysis of the COI mitochondrial fragment and five additional independent nuclear gene segments. The phylogenetic results provide a better foundation for assessing genus-level assignments within the subfamily and reveal goals for future taxonomic research. Furthermore, morphological examinations helped to clarify and solidify generic classifications. Calibration of molecular clocks with recently verified fossil data permitted realistic estimates for the origins and evolutionary age of pliocardiins during the Cenozoic Era from a deep-dwelling ancestor.http://zoobank.org/urn:lsid:zoobank

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Section: Discussionmentioning

confidence: 55%

Section: Introductionmentioning

confidence: 99%

Phylogeny and origins of chemosynthetic vesicomyid clams

Johnson

Krylova

Audzijonytė

et al. 2016

Systematics and Biodiversity

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“…gigas may exhibit stronger allogenic effects (i.e. bioturbation) [ 26 , 130 ]. Enhanced bioturbation by A .…”

Section: Discussionmentioning

confidence: 99%

Food-Web Complexity in Guaymas Basin Hydrothermal Vents and Cold Seeps

et al. 2016

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In the Guaymas Basin, the presence of cold seeps and hydrothermal vents in close proximity, similar sedimentary settings and comparable depths offers a unique opportunity to assess and compare the functioning of these deep-sea chemosynthetic ecosystems. The food webs of five seep and four vent assemblages were studied using stable carbon and nitrogen isotope analyses. Although the two ecosystems shared similar potential basal sources, their food webs differed: seeps relied predominantly on methanotrophy and thiotrophy via the Calvin-Benson-Bassham (CBB) cycle and vents on petroleum-derived organic matter and thiotrophy via the CBB and reductive tricarboxylic acid (rTCA) cycles. In contrast to symbiotic species, the heterotrophic fauna exhibited high trophic flexibility among assemblages, suggesting weak trophic links to the metabolic diversity of chemosynthetic primary producers. At both ecosystems, food webs did not appear to be organised through predator-prey links but rather through weak trophic relationships among co-occurring species. Examples of trophic or spatial niche differentiation highlighted the importance of species-sorting processes within chemosynthetic ecosystems. Variability in food web structure, addressed through Bayesian metrics, revealed consistent trends across ecosystems. Food-web complexity significantly decreased with increasing methane concentrations, a common proxy for the intensity of seep and vent fluid fluxes. Although high fluid-fluxes have the potential to enhance primary productivity, they generate environmental constraints that may limit microbial diversity, colonisation of consumers and the structuring role of competitive interactions, leading to an overall reduction of food-web complexity and an increase in trophic redundancy. Heterogeneity provided by foundation species was identified as an additional structuring factor. According to their biological activities, foundation species may have the potential to partly release the competitive pressure within communities of low fluid-flux habitats. Finally, ecosystem functioning in vents and seeps was highly similar despite environmental differences (e.g. physico-chemistry, dominant basal sources) suggesting that ecological niches are not specifically linked to the nature of fluids. This comparison of seep and vent functioning in the Guaymas basin thus provides further supports to the hypothesis of continuity among deep-sea chemosynthetic ecosystems.

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“…Vesicomya galatheae was described from off Costa Rica and Panama at 2950- 3570 m. Morphologically similar to Vesicomya pacifica (Smith, 1885) holotype NHMUK 1887.2.9.2710-11 but Krylova et al (2015) regard this as a northern Pacific species distinguished from V. galatheae by the shape, hinge teeth and number of siphonal tentacles. When comparing sequences from our CCZ specimens with the Vesicomya pacifica from Krylova et al (2015), the K2P difference is 0.11.…”

Section: Systematicsmentioning

confidence: 93%

“…When comparing sequences from our CCZ specimens with the Vesicomya pacifica from Krylova et al (2015), the K2P difference is 0.11. In the molecular tree (Fig.…”

Section: Systematicsmentioning

confidence: 94%

Abyssal fauna of the UK-1 polymetallic nodule exploration area, Clarion-Clipperton Zone, central Pacific Ocean: Mollusca

Wiklund¹,

Taylor²,

Dahlgren³

et al. 2017

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We present the first DNA taxonomy publication on abyssal Mollusca from the Clarion-Clipperton Zone (CCZ), central Pacific ocean, using material collected as part of the Abyssal Baseline (ABYSSLINE) environmental survey cruise ‘AB01’ to the UK Seabed Resources Ltd (UKSRL) polymetallic-nodule exploration area ‘UK-1’ in the eastern CCZ. This is the third paper in a series to provide regional taxonomic data for a region that is undergoing intense deep-sea mineral exploration for high-grade polymetallic nodules.Taxonomic data are presented for 21 species from 42 records identified by a combination of morphological and genetic data, including molecular phylogenetic analyses. These included 3 heterodont bivalves, 5 protobranch bivalves, 4 pteriomorph bivalves, 1 caudofoveate, 1 monoplacophoran, 1 polyplacophoran, 4 scaphopods and 2 solenogastres. Gastropoda were recovered but will be the subject of a future study. Seven taxa matched published morphological descriptions for species with deep Pacific type localities, and our sequences provide the first genetic data for these taxa. One taxon morphologically matched a known cosmopolitan species but with a type locality in a different ocean basin and was assigned the open nomenclature ‘cf’ as a precautionary approach in taxon assignments to avoid over-estimating species ranges. One taxon is here described as a new species, Ledella knudseni sp. n. For the remaining 12 taxa, we have determined them to be potentially new species, for which we make the raw data, imagery and vouchers available for future taxonomic study. The Clarion-Clipperton Zone is a region undergoing intense exploration for potential deep-sea mineral extraction. We present these data to facilitate future taxonomic and environmental impact study by making both data and voucher materials available through curated and accessible biological collections.

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Vesicomyinae (Bivalvia: Vesicomyidae) of the Kuril–Kamchatka Trench and adjacent abyssal regions

Cited by 20 publications

References 24 publications

Phylogeny and origins of chemosynthetic vesicomyid clams

Phylogeny and origins of chemosynthetic vesicomyid clams

Food-Web Complexity in Guaymas Basin Hydrothermal Vents and Cold Seeps

Abyssal fauna of the UK-1 polymetallic nodule exploration area, Clarion-Clipperton Zone, central Pacific Ocean: Mollusca

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