A new Early Jurassic gastropod from Ellesmere Island, Canadian Arctic - an ancient example of holoplanktonic gastropods

Nützel, Alexander; Schneider, Simon; Hülse, Peter; Kelly, Simon R. A.; Tilley, Laura; Veit, Reinhart

doi:10.3140/bull.geosci.1597

Cited by 7 publications

(11 citation statements)

References 15 publications

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“…Finally, the morphospecies Atlanta peronii, which is made up of four putative species, was used to calibrate more recent speciation [15]. The fossil genus Freboldia (163.5-157.3 Ma) was not included in the calibrations because, unlike B. minuta, this species does not show morphological similarity to the Atlantidae and we are uncon dent in its current placement [18]. Two independent MCMC chains were run with 10 8 generations each and checked for convergence with a burnin of 10% in Tracer 1.6.0 [67] before being combined using LogCombiner 2.5.0 [64].…”

Section: Fossil-calibrated Phylogenymentioning

confidence: 99%

“…Holoplanktonic gastropods rst appear in the Jurassic, coinciding with the Early Jurassic Anoxia Event [18]. Amongst the earliest holoplanktonic gastropods are several potential heteropod genera including Coelodiscus, Freboldia and Tatediscus [16,19,20].…”

Section: Introductionmentioning

confidence: 99%

“…Destombes [24] considered the relationship between B. minuta and the genus Oxygyrus to be unclear, due to differences in size and incompleteness of the aperture in B. minuta fossils. He thereforeplaced B. minuta into a separate family, Bellerophinidae, in which an older genus Freboldia (163.5-157.3 Ma) is now also placed [18].However, the relationship between Oxygyrus and B. minuta remains enigmatic [23], and here we consider B. minuta to belong within the family Atlantidae, having a shell morphology very similar to the extant genus Oxygyrus [23]. Indeed, the World Register of Marine Species places the genus Bellerophina within the Family Atlantidae.…”

Section: Introductionmentioning

confidence: 99%

“…Indeed, the World Register of Marine Species places the genus Bellerophina within the Family Atlantidae. Freboldia uitans Nützel & Schneider, 2016163.5-157.3 Ma) is thought to be holoplanktonic and its shell morphology is involute and quite rounded in shape, however, unlike B. minuta, the shell surface has little or no ornamentation, and the coiling direction of F. uitans cannot be determined with certainty [18].…”

Section: Introductionmentioning

confidence: 99%

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Fossil-calibrated molecular phylogeny of atlantid heteropods (Gastropoda, Pterotracheoidea)

Wall-Palmer

Janssen

Goetze

et al. 2020

Preprint

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Abstract Background: The aragonite shelled, planktonic gastropod family Atlantidae (shelled heteropods) is likely to be one of the first groups to be impacted by imminent ocean changes, including ocean warming and ocean acidification. With a fossil record spanning at least 100 Million years (Ma), atlantids have experienced and survived global-scale ocean changes and extinction events in the past. However, the diversification patterns and tempo of evolution in this family are largely unknown. Results: Based on a concatenated maximum likelihood phylogeny of three genes (cytochrome c oxidase subunit 1 mitochondrial DNA, 28S and 18S ribosomal rRNA) we show that the three extant genera of the family Atlantidae, Atlanta, Protatlanta and Oxygyrus, form monophyletic groups. The genus Atlanta is split into two groups, one exhibiting smaller, well ornamented shells, and the other having larger, less ornamented shells. The fossil record, in combination with a fossil-calibrated phylogeny, suggests that large scale atlantid extinction was accompanied by considerable and rapid diversification over the last 25 Ma, potentially driven by vicariance events. Conclusions: Now confronted with a rapidly changing modern ocean, the ability of atlantids to survive past global change crises gives some optimism that they may be able to persist through the Anthropocene.

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Section: Fossil-calibrated Phylogenymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Fossil-calibrated molecular phylogeny of atlantid heteropods (Gastropoda, Pterotracheoidea)

Wall-Palmer

Janssen

Goetze

et al. 2020

Preprint

View full text Add to dashboard Cite

show abstract

“…Holoplanktonic gastropods are thought to have evolved from benthic gastropods with planktotrophic larvae, with likely progression to remain planktonic in response to increasing hostility of the sea floor, including anoxic bottom conditions [ 16 ] and/or an increase in benthic shell destroying predators [ 17 ]. Holoplanktonic gastropods first appear in the Jurassic, coinciding with the Early Jurassic Anoxia Event [ 18 ]. Amongst the earliest holoplanktonic gastropods are several potential heteropod genera including Coelodiscus, Freboldia and Tatediscus [ 16 , 19 , 20 ].…”

Section: Introductionmentioning

confidence: 99%

Fossil-calibrated molecular phylogeny of atlantid heteropods (Gastropoda, Pterotracheoidea)

et al. 2020

View full text Add to dashboard Cite

Background The aragonite shelled, planktonic gastropod family Atlantidae (shelled heteropods) is likely to be one of the first groups to be impacted by imminent ocean changes, including ocean warming and ocean acidification. With a fossil record spanning at least 100 Ma, atlantids have experienced and survived global-scale ocean changes and extinction events in the past. However, the diversification patterns and tempo of evolution in this family are largely unknown. Results Based on a concatenated maximum likelihood phylogeny of three genes (cytochrome c oxidase subunit 1 mitochondrial DNA, 28S and 18S ribosomal rRNA) we show that the three extant genera of the family Atlantidae, Atlanta, Protatlanta and Oxygyrus, form monophyletic groups. The genus Atlanta is split into two groups, one exhibiting smaller, well ornamented shells, and the other having larger, less ornamented shells. The fossil record, in combination with a fossil-calibrated phylogeny, suggests that large scale atlantid extinction was accompanied by considerable and rapid diversification over the last 25 Ma, potentially driven by vicariance events. Conclusions Now confronted with a rapidly changing modern ocean, the ability of atlantids to survive past global change crises gives some optimism that they may be able to persist through the Anthropocene.

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Some observations on the geological history of the holoplanktonic gastropods

Hart

Wall-Palmer

Janssen

et al. 2020

Proceedings of the Geologists' Association

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A new Early Jurassic gastropod from Ellesmere Island, Canadian Arctic - an ancient example of holoplanktonic gastropods

Cited by 7 publications

References 15 publications

Fossil-calibrated molecular phylogeny of atlantid heteropods (Gastropoda, Pterotracheoidea)

Fossil-calibrated molecular phylogeny of atlantid heteropods (Gastropoda, Pterotracheoidea)

Fossil-calibrated molecular phylogeny of atlantid heteropods (Gastropoda, Pterotracheoidea)

Some observations on the geological history of the holoplanktonic gastropods

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