Into the deep: A phylogenetic approach to the bivalve subclass Protobranchia

Sharma, Prashant P.; Zardus, John D.; Boyle, Elizabeth E.; González, Vanessa L.; Jennings, Robert M.; McIntyre, Erin; Wheeler, Ward C.; Etter, Ron J.; Giribet, Gonzalo

doi:10.1016/j.ympev.2013.05.018

Cited by 77 publications

(62 citation statements)

References 69 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Forms a unique monophyletic clade distinct from all other AB01 specimens. Genetic match in 18S to Bathyspinula calcar (GenBank KC993875) from the north eastern Pacific (Sharma et al 2013), but as the GenBank 18S sequence from B. calcar was only 289 bp long and as that specimen lacked COI, it was not included in the analyses. Some very small juvenile specimens (Fig.…”

Section: Systematicsmentioning

confidence: 99%

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

Wiklund¹,

Taylor²,

Dahlgren³

et al. 2017

View full text Add to dashboard Cite

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.

show abstract

Section: Systematicsmentioning

confidence: 99%

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

Wiklund¹,

Taylor²,

Dahlgren³

et al. 2017

View full text Add to dashboard Cite

show abstract

“…With a Cambrian origin (Carter et al 2000;Sharma et al 2013), this subclass has diversified and colonised the deep sea, representing ~ 50 and 90% of bivalve species on the continental slope and abyssal plain, respectively (Allen 1978). Although protobranch bivalves are important bioturbators in the deep sea (Zardus 2002), they remain one of the least studied molluscan groups (Sharma et al 2013;Reed et al 2014). Protobranch bivalves are well represented in the Antarctic, but information regarding the ecology of Protobranchia in the Southern Ocean is limited as most species are found only in deeper water (Reed et al 2013b).…”

Section: Introductionmentioning

confidence: 99%

The reproductive ecology of the Antarctic bivalve Aequiyoldia eightsii (Protobranchia: Sareptidae) follows neither Antarctic nor taxonomic patterns

et al. 2018

View full text Add to dashboard Cite

The accepted paradigm for reproduction in Antarctic marine species is one where oogenesis takes 18 months to 2 years, and a bimodal egg-size distribution where two cohorts of eggs are present in female gonads throughout the year. These slow gametogenic traits are driven by low temperature and/or the restriction of resource availability because of extreme seasonality in the marine environment. Here we present data on the reproductive ecology of the common Antarctic bivalve Aequiyoldia eightsii (Jay, 1839) (Protobranchia: Sarepidae) from monthly samples collected between January 2013 and May 2014 at Hangar Cove, Rothera Point on the West Antarctic Peninsula. These data show that A. eightsii is unusual because it does not follow the typical pattern expected for reproduction in Antarctic marine invertebrates, and differs also from closely related nuculanid protobranch bivalves with respect to gametogenic duration and reproductive periodicity. Continuous oogenesis, evidenced by the year-round occurrence of previtellogenic, vitellogenic, and ripe oocytes in female gonads, is supplemented by a seasonal increase in reproductive intensity and spawning in Austral winter (April-May), evidenced by the loss of mature spermatozoa and ripe oocytes from males and females, respectively. The simultaneous occurrence of these contrasting traits in individuals is attributed to a flexible feeding strategy (suspension and deposit feeding) in response to seasonal changes in food supply characteristic of the Antarctic marine environment. Asynchrony between individual females is also notable. We hypothesise that the variability may represent a trade-off between somatic and reproductive growth, and previously reported internal interannual cycles in shell growth.

show abstract

“…The use of such a multi-gene molecular approach has helped resolve problems in different molluscan clades (e.g., Puillandre et al, 2008;Aktipis et al, 2010;Tëmkin, 2010;Sharma et al, 2013). The present study aims to improve the phylogenetic understanding of the Fasciolariidae and investigate the diversification patterns of its members by conducting multi-gene phylogenetic analyses.…”

Section: Introductionmentioning

confidence: 99%