7 Works

Phylogenetic data for the lichen genus Bacidia originally used to describe a new species, Bacidia gigantensis

Troy McMullin & James Lendemer
Bacidia gigantensis, a green to greenish-brown, sorediate, crustose to microsquamulose lichen is described a new to science. It is corticolous on mature Thuja occidentalis trees throughout Sleeping Giant Provincial Park on the Sibley Peninsula along the north shore of Lake Superior, Ontario. The species is unusual within Bacidia due to the production of asexual propagules and homosekikaic acid. Placement in Bacidia is based on the characters of the sexual reproductive structures (biatorine apothecia with a...

Canada's first known dinosaurs: Palaeontology and collecting history of upper Cretaceous vertebrates in Southern Alberta and Saskatchewan, 1874-1889

Brigid Christison, Darren Tanke & Jordan Mallon
The early collecting history of dinosaurs and other fossil vertebrates in Western Canada during the 1870s and 1880s is poorly documented. Initial finds were made by the British North American Boundary Commission and the Geological Survey of Canada in modern Saskatchewan and Alberta but, beyond a few well-publicized examples, little is known about precisely what was found and where. Much of the collected material is now housed in the collections of the Canadian Museum of...

Data from: Monadelpha (Euphorbiaceae, Plukenetieae), a new genus of Tragiinae from the Amazon rainforest of Venezuela and Brazil

Lynn J. Gillespie, Warren M. Cardinal-McTeague & Kenneth J. Wurdack
Monadelpha L.J.Gillespie & Card.-McTeag., gen. nov., is described as a new member of Euphorbiaceae tribe Plukenetieae subtribe Tragiinae, to accommodate Tragia guayanensis, a species known from western Amazonas, Venezuela and, newly reported here, from Amazonas, Brazil. The genus is unique in the subtribe for having 5-colpate pollen and staminate flowers with filaments entirely connate into an elongate, cylindrical staminal column terminated by a tight cluster of anthers. Phylogenetic analyses based on nuclear rDNA ITS and...

Data from: Shells of the bivalve Astarte moerchi give new evidence of a strong pelagic-benthic coupling shift occurring since the late 1970s in the NOW Polynya

Frederic Olivier, Blandine Gaillard, Julien Thébault, Tarik Meziane, Réjean Tremblay, Dany Dumont, Simon Bélanger, Michel Gosselin, Aurélie Jolivet, Laurent Chauvaud, André L. Martel, Søren Rysgaard, Anne-Hélène Olivier, Julien Pettré, Jérôme Mars, Silvain Gerber & Philippe Archambault
Climate changes in the Arctic may weaken the currently tight pelagic-benthic coupling. In response to decreasing sea ice cover, arctic marine systems are expected to shift from a ‘sea-ice algae-benthos’ to a ‘phytoplankton-zooplankton’ dominance. We used mollusk shells as bioarchives and fatty acid trophic markers to estimate the effects of the reduction of sea ice cover on the exported food to the seafloor. Bathyal bivalve Astarte moerchi that lives at 600 m depth in northern...

Data from: A revised sectional classification of Plukenetia L. (Euphorbiaceae, Acalyphoideae) with four new species from South America

Warren M. Cardinal-McTeague & Lynn J. Gillespie
Abstract—We present a phylogenetic classification for Plukenetia (Euphorbiaceae, Acalyphoideae) based on morphology and molecular phylogenetic studies using nuclear (ETS, ITS, KEA1 introns 11 and 17, TEB exon 17) and plastid (matK, ndhF, psbA-trnH) DNA data. Plukenetia comprises 25 species divided into six sections, with three new sections and four new species described here. The circumscription of Plukenetia is unaltered from recent treatments and we continue to recognize Romanoa as distinct. The sections of Plukenetia correspond...

Data from: Spatial and environmental influences on selection in a clock gene coding trinucleotide repeat in Canada lynx (Lynx canadensis)

Melanie Prentice, Jeff Bowman, Dennis Murray, Kamal Khidas & Paul Wilson
Clock genes exhibit substantial control over gene expression and ultimately life-histories using external cues such as photoperiod, and are thus likely to be critical for adaptation to shifting seasonal conditions and novel environments as species redistribute their ranges under climate change. Coding trinucleotide repeats (cTNRs) are found within several clock genes, and may be interesting targets of selection due to their containment within exonic regions and elevated mutation rates. Here, we conduct inter-specific characterization of...

A comprehensive sampling of species sheds light on the molecular phylogenetics of Calothecinae (Poaceae, Pooideae): evidence for a new subtribe and multiple genera within the Chascolytrum clade

Leonardo Nogueira Da Silva, Jeffery Saarela, Liliana Essi & Tatiana Souza-Chies
The circumscription of subtribe Calothecinae has undergone several changes since its description. Currently, three genera are considered in the subtribe: Chascolytrum, Laegaardia and Paramochloa, although no phylogenetic evidence for the placement of the two last genera was published so far. In this study we aim to evaluate the circumscription of Calothecinae and the infrageneric classification recently proposed for Chascolytrum using a more comprehensive sampling of taxa and molecular markers. We included species of all genera...

Registration Year

  • 2020
    7

Resource Types

  • Dataset
    7

Affiliations

  • Canadian Museum of Nature
    7
  • University of Montreal
    2
  • National Museum of Natural History
    1
  • University of Rennes 1
    1
  • Universidade Federal de Santa Maria
    1
  • University of Western Brittany
    1
  • University of Manitoba
    1
  • Ontario Ministry of Natural Resources
    1
  • Carleton University
    1
  • Grenoble Images Parole Signal Automatique
    1