Implications of range overlap in the commercially important pan-tropical sea urchin genus Tripneustes (Echinoidea: Toxopneustidae)

Bronstein, Omri; Kroh, Andreas; Miskelly, A.; Smith, Stephen; Dworjanyn, Symon A.; Mos, Benjamin; Byrne, Maria

doi:10.1007/s00227-019-3478-4

Cited by 11 publications

(13 citation statements)

References 23 publications

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“…10–15 ng). Details on primers and protocols can be found in Bronstein et al, 2019 . PCR products were visualized on a 1% agarose gel, purified using ExoSAP-IT (Affymetrix), and sequenced at Microsynth GmbH (Vienna, Austria) with the same primers.…”

Section: Sequencing and Further Bioinformatic Detailsmentioning

confidence: 99%

Phylogenomic analyses of echinoid diversification prompt a re-evaluation of their fossil record

Koch

Thompson

Hiley

et al. 2022

eLife

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Echinoids are key components of modern marine ecosystems. Despite a remarkable fossil record, the emergence of their crown group is documented by few specimens of unclear affinities, rendering their early history uncertain. The origin of sand dollars, one of its most distinctive clades, is also unclear due to an unstable phylogenetic context. We employ 18 novel genomes and transcriptomes to build a phylogenomic dataset with a near-complete sampling of major lineages. With it, we revise the phylogeny and divergence times of echinoids, and place their history within the broader context of echinoderm evolution. We also introduce the concept of a chronospace – a multidimensional representation of node ages – and use it to explore methodological decisions involved in time calibrating phylogenies. We find the choice of clock model to have the strongest impact on divergence times, while the use of site-heterogeneous models and alternative node prior distributions show minimal effects. The choice of loci has an intermediate impact, affecting mostly deep Paleozoic nodes, for which clock-like genes recover dates more congruent with fossil evidence. Our results reveal that crown group echinoids originated in the Permian and diversified rapidly in the Triassic, despite the relative lack of fossil evidence for this early diversification. We also clarify the relationships between sand dollars and their close relatives and confidently date their origins to the Cretaceous, implying ghost ranges spanning approximately 50 million years, a remarkable discrepancy with their rich fossil record.

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Section: Sequencing and Further Bioinformatic Detailsmentioning

confidence: 99%

Phylogenomic analyses of echinoid diversification prompt a re-evaluation of their fossil record

Koch

Thompson

Hiley

et al. 2022

eLife

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“…10-15 ng). Details on primers and protocols can be found in [103]. PCR products were visualized on a 1% agarose gel, purified using ExoSAP-IT (Affymetrix), and sequenced at Microsynth GmbH (Vienna, Austria) with the same primers.…”

Section: Bathysalenia Phoinissa Micropyga Tuberculatamentioning

confidence: 99%

Phylogenomic analyses of echinoid diversification prompt a re-evaluation of their fossil record

Koch

Thompson

Hatch

et al. 2021

Preprint

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Echinoids are key components of modern marine ecosystems. Despite a remarkable fossil record, the emergence of their crown group is documented by few specimens of unclear affinities, rendering their early history uncertain. The origin of sand dollars, one of its most distinctive clades, is also unclear due to an unstable phylogenetic context. We employ seventeen novel genomes and transcriptomes to build a dataset with a near-complete sampling of major lineages and use it to revise the phylogeny and divergence times of echinoids. We introduce the concept of a chronospace - a multidimensional representation of node ages - and use it to explore the effects of using alternative gene samples, models of molecular evolution, and clock priors. We find the choice of clock model to have the strongest impact on divergence times, while gene sampling and the use of site-heterogeneous models show little effects. Crown group echinoids originated in the Permian and diversified rapidly in the Triassic. We clarify the relationships among sand dollars and their close relatives, showing that Apatopygus represents a relict lineage with a deep Jurassic origin. Sand dollars are confidently dated to the Cretaceous, implying ghost ranges spanning approximately 50 million years, a remarkable discrepancy with their fossil record.

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“…Amplification of the initial COI fragment followed Bronstein et al (2019) using the forward primer COI16bf 5′-AGCCAGGTCAGTTTCTATCT-3′ (Bronstein et al 2019) with the reverse primer COIeR5′-GCTCGTGTGTCTACGTCCAT-3′ (Arndt et al 1996) (flanking a region of ~1000 bp). PCR reactions were done in a total volume of 25 µL and contained 5.0 μL of DNA, 2.5 μL of 10× CoralLoad PCR Buffer, 2.0 μL of 25 mM of MgCl 2 , 0.5 μL of 10 mM of dNTPs, 0.25 μL of each 10-mM forward and reverse primers, 0.25 μL of CoralLoad DNA polymerase and brought to 25 μL with nuclease free water.…”

Section: Methodsmentioning

confidence: 99%

“…Tripneustes kermadecensis was first identified as a distinct species by morphological and molecular genetic analysis of specimens from the Kermadec Islands, New Zealand (Bronstein et al 2017). Subsequently, T. kermadecensis was confirmed to be the species that also commonly occurs in the subtropical and temperate regions of NSW, locally as the ‘lamington urchin’ (Bronstein et al 2017, 2019).…”

Section: Introductionmentioning

confidence: 98%

“…In the subtropical-to-temperate transition zone of New South Wales (NSW) in eastern Australia, two species of Tripneustes co-occur, the tropical species T. g. gratilla and the subtropical species T. kermadecensis . Until recent taxonomic clarification (Bronstein et al 2019), the presence of T. kermadecensis was misidentified as a range extension of T. g. gratilla (Castro et al 2020). This confusion may have been driven by the wide variety of colour morphs that exist within T. g gratilla globally (Bronstein et al 2016).…”

Section: Introductionmentioning

confidence: 99%

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Hidden in plain sight: Tripneustes kermadecensis (Echinodermata: Echinoidea) is a junior synonym of the eastern Australian sea urchin Evechinus australiae described in 1878

McLaren,

Bronstein,

Kroh

et al. 2023

Invertebr. Syst.

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Accurate taxonomy and descriptions of species are key to understanding biodiversity. The echinoid genus Tripneustes is an ecologically and commercially important taxon that includes the tropical Tripneustes gratilla gratilla and the recently described T. kermadecensis from Australia and New Zealand. While examining the Australian Museum collections to clarify the distributions of these two species in eastern Australia we found potential senior type material for T. kermadecensis. These specimens from Sydney Harbour were originally described in 1878 as Evechinus australiae by Tenison-Woods but neither illustrated nor redescribed in any subsequent report. We undertook molecular and morphological analysis of these specimens to determine whether T. kermadecensis and E. australiae represent two distinct taxa or not. This included micro-computed tomography, quantification of test traits and molecular genetic analysis. The COI sequence and morphology of Evechinus australiae matched that of Tripneustes kermadecensis. As such, T. kermadecensis is a junior synonym of Evechinus australiae. The correct designation of this taxon is therefore Tripneustes australiae (Tenison-Woods, 1878).ZooBank: urn:lsid:zoobank.org:pub:9B9E685C‐9C1C‐4645‐A799‐D97969BAA033

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Implications of range overlap in the commercially important pan-tropical sea urchin genus Tripneustes (Echinoidea: Toxopneustidae)

Cited by 11 publications

References 23 publications

Phylogenomic analyses of echinoid diversification prompt a re-evaluation of their fossil record

Phylogenomic analyses of echinoid diversification prompt a re-evaluation of their fossil record

Phylogenomic analyses of echinoid diversification prompt a re-evaluation of their fossil record

Hidden in plain sight: Tripneustes kermadecensis (Echinodermata: Echinoidea) is a junior synonym of the eastern Australian sea urchin Evechinus australiae described in 1878

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