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Current Status of the Tardigrada: Evolution and Ecology1
  • D. Nelson
  • Biology, Medicine
  • Integrative and comparative biology
  • 1 July 2002
Tardigrades have a hemocoel-type of fluid-filled body cavity, a complete digestive tract, and a lobed dorsal brain with a ventral nerve cord with fused ganglia, and the phylogenetic position of tardigrade as a sister group of the arthropods is confirmed. Expand
Young whale sharks, Rhincodon typus, feeding on a copepod bloom near La Paz, Mexico
Seven small (3.2 to 5.2 m total length) whale sharks were observed suction feeding on patches of surface plankton in the Bay of La Paz within 1 km of shore and 2 km N of the phosphate dock at SanExpand
A Family Level Analysis of Tardigrade Phylogeny
The 18S rRNA gene sequence of Batillipes mirus Richters, 1909 and Calohypsibius schusteri Nelson & McGlothlin, 1996 were obtained and their addition to a previously published dataset supports the monophyly of Heterotardigrada and of Parachela versus Apochela within the Eutardigrade. Expand
A Large-scale, Multihabitat Inventory of the Phylum Tardigrada in the Great Smoky Mountains National Park, USA: A Preliminary Report
An All Taxa Biodiversity Inventory (ATBI) is underway in the Great Smoky Mountains National Park (GSMNP), with the goal of attempting to identify all species of life in the 2000 km2 park. The GSMNPExpand
An evaluation of species richness estimators for tardigrades of the Great Smoky Mountains National Park, Tennessee and North Carolina, USA
For the past 5 years we have been conducting a large-scale, multi-habitat inventory of the tardigrades in the Great Smoky Mountains National Park (U.S.A.) as part of the All Taxa BiodiversityExpand
The biology and ecology of lotic Tardigrada
Summary 1Tardigrades comprise a micrometazoan phylum that is a sister group of the arthropods. 2They are components of the meiobenthos in lotic habitats, and ≈ 50–70 species have been reported inExpand
Macrobiotus (Eutardigrada, Macrobiotidae) from the Great Smoky Mountains National Park, Tennessee/North Carolina, USA (North America): two new species and six new records
A large-scale multihabitat inventory of tardigrades in the Great Smoky Mountains National Park in Tennessee and North Carolina, USA, finds two new species of Macrobiotus, one of which differs from all other species of the MacRobiotus hufelandi group by having a very simple buccal armature without bands of teeth, very large elliptical cuticular pores, unique characteristics of the egg, and other morphometric characters. Expand
Robust support for tardigrade clades and their ages from three protein-coding nuclear genes
Parsimony and likelihood analyses of nucleotides and amino acids yielded strong support for Tardigrada and all internal nodes and Divergence times have been estimated from amino acid sequence data using an empirical Bayesian statistical approach, which does not assume a strict molecular clock. Expand
“Smoky Bears”—Tardigrades of Great Smoky Mountains National Park
Challenges inherent in tardigrade taxonomy and the need for revisions of species groups are discussed. Expand