Sympatric Australian Lasaea species (Mollusca: Bivalvia) differ in their ploidy levels, reproductive modes and developmental modes

Foighil, Diarmaid Ó; Thiriot-Quiévreux, Catherine

doi:10.1006/zjls.1999.0192

Cited by 10 publications

(13 citation statements)

References 39 publications

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“…It also grows to a much larger size, 6.5 mm. Lasaea colmani Ó Foighil & Thiriot-Quiévreux, 1999, from Sydney is less than half the size, broader with very low broad, posteriorly placed umbones.…”

Section: Lasaea Eastera Sp Nov Figures 26 A-hmentioning

confidence: 99%

Biodiversity Quadrupled—Revision of Easter Island and Salas y Gómez Bivalves

RAINES¹,

HUBER²

2012

Zootaxa

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Seventy-one bivalve species, including fifteen new species living in the waters of Easter and Salas y Gómez Islands are hereindescribed: Nuculana (s.l.) anakena sp. nov., Lasaea eastera sp. nov., Borniola pasca sp. nov., Hyalokellia tahaia sp. nov., Tell-imya pauciradiata sp. nov., Tellimya tahaia sp. nov., Thecodonta rainesi sp. nov., Acrosterigma triangulare sp. nov., Herouvaliarapanui sp. nov., Moerella laperousea sp. nov., Abranda lamprelli sp. nov., Timoclea keegani sp. nov., Hyphantosoma crassumsp. nov., Hyphantosoma tenue sp. nov. and Austroneaera eastera sp. nov. Illustrated for the first time is the type material of Tin-daria salaria Dall, 1908. Results of this study also revise previously accepted levels of endemicity as well as species affiliation with other biogeographical areas.

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Section: Lasaea Eastera Sp Nov Figures 26 A-hmentioning

confidence: 99%

Biodiversity Quadrupled—Revision of Easter Island and Salas y Gómez Bivalves

RAINES¹,

HUBER²

2012

Zootaxa

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“…The temperate Australian coast harbours a small endemic clam species, Lasaea australis (Lamarck, 1818). It is arguably the most common bivalve in the temperate Australian rocky intertidal fauna (Tong ) and occurs in all three biogeographic provinces, nestled in rock crevices, under coralline algae or among encrusting epifauna (Roberts ; Ó Foighil ; Ó Foighil & Thiriot‐Quievreux ). L. australis is the only member of the near‐cosmopolitan genus Lasaea known to have planktotrophic larval development.…”

Section: Introductionmentioning

confidence: 99%

“…L. australis is the only member of the near‐cosmopolitan genus Lasaea known to have planktotrophic larval development. All others are direct developers that release crawl‐away juveniles (Ó Foighil ) and they are primarily composed of asexual clonal lineages (Ó Foighil & Smith , ; Ó Foighil & Thiriot‐Quievreux ; Taylor & Ó Foighil ). The global collective range of direct developing congeners has been attributed to long distance rafting: asexual clams that release nonpelagic juveniles are more likely to turn a rare rafting event into a successful colonization than are sexual congeners with obligate planktotrophic larval development (Ó Foighil ; Ó Foighil & Jozefowicz ).…”

Section: Introductionmentioning

confidence: 99%

Triton's trident: cryptic Neogene divergences in a marine clam (Lasaea australis) correspond to Australia's three temperate biogeographic provinces

Foighil

Park

2013

Molecular Ecology

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The southern coast of Australia is composed of three distinct biogeographic provinces distinguished primarily by intertidal community composition. Several ecological mechanisms have been proposed to explain their formation and persistence, but no consensus has been reached. The marine clam Lasaea australis is arguably the most common bivalve on southern Australian rocky shores and occurs in all three provinces. Here, we tested if this species exhibits cryptic genetic structuring corresponding to the provinces and if so, what mechanisms potentially drove its divergence. Variation in two mitochondrial genes (16S and COIII) and one nuclear gene (ITS2) was assayed to test for genetic structuring and to reconstruct the clam's phylogenetic history. Our results showed that L. australis is comprised of three cryptic mitochondrial clades, each corresponding almost perfectly to one of the three biogeographic provinces. Divergence time estimates place their cladogenesis in the Neogene. The trident-like topology and Neogene time frame of L. australis cladogenesis are incongruent with Quaternary vicariance predictions: a two-clade topology produced by Pleistocene Bass Strait land bridge formation. We hypothesize that the interaction of the Middle Miocene Climate Transition with the specific geography of the southern coastline of Australia was the primary cladogenic driver in this clam lineage. Additional in-depth studies of the endemic southern Australian marine biota across all three provinces are needed to establish the generality of this proposed older framework for regional cladogenesis.

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“…1997; Mewes et al . 1997; Wolfe & Shields 1997), invertebrates (Foighil & Thiriot‐Quievreux 1999) and vertebrates (Spring 1997; Pebusque et al . 1998; McLysaght et al .…”

Section: Introductionmentioning

confidence: 99%

Patterns of nucleotide variation in homoeologous regulatory genes in the allotetraploid Hawaiian silversword alliance (Asteraceae)

2003

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Genome-wide duplication (polyploidization) is prevalent in a large number of eukaryotic organisms and is particularly widespread in flowering plants. Polyploid species appear to vary from their diploid progenitors in a variety of ecologically important traits, suggesting that genome duplications provide a mechanism for ecological diversification. Studies of nucleotide variation at duplicate genes that arise via polyploidization allow us to infer the evolutionary forces that act on these polyploid loci. In an effort to examine the evolutionary dynamics of homoeologous loci, molecular population genetic analyses were undertaken for duplicate regulatory genes in the allopolyploid Hawaiian silversword alliance, a premier example of adaptive radiation. The levels and patterns of nucleotide variation for the floral homeotic genes ASAPETALA1 (ASAP1) and ASAPETALA3/TM6 (ASAP3/TM6) were studied in two species representing different lineages within the Hawaiian silversword alliance: Argyroxiphium sandwicense ssp. macrocephalum and Dubautia ciliolata ssp. glutinosa. Homoeologueous copies of ASAP1 and ASAP3/TM6 show differing levels and patterns of nucleotide polymorphism. Duplicate ASAP1 copies have similar levels of nucleotide diversity and haplotype structure in both species; by contrast, duplicate ASAP3/TM6 genes display different levels and patterns of variation in D. ciliolata ssp. glutinosa. Additionally, D. ciliolata ssp. glutinosa appears to be segregating for a moderate frequency null allele in one ASAP3/TM6 homoeologue. These results suggest that differing evolutionary forces can affect duplicate loci arising from allopolyploidization.

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Sympatric Australian Lasaea species (Mollusca: Bivalvia) differ in their ploidy levels, reproductive modes and developmental modes

Cited by 10 publications

References 39 publications

Biodiversity Quadrupled—Revision of Easter Island and Salas y Gómez Bivalves

Biodiversity Quadrupled—Revision of Easter Island and Salas y Gómez Bivalves

Triton's trident: cryptic Neogene divergences in a marine clam (Lasaea australis) correspond to Australia's three temperate biogeographic provinces

Patterns of nucleotide variation in homoeologous regulatory genes in the allotetraploid Hawaiian silversword alliance (Asteraceae)

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