Showing papers by "Thierry Backeljau published in 2019"
108 citations
TL;DR: It is asked that manuscripts submitted for publication be required to use Crassostrea as the accepted genus for all Pacific and Atlantic cupped oysters, until a more detailed and comprehensive genomic analysis resolves the correct nomenclature.
22 citations
TL;DR: This study provides evidence to suggest nine species new to science and to synonymize 12 nominal morphospecies in Glyphidrilus by integrating DNA sequence and morphological data, and illustrates that the uncritical use of COI as a universal DNA barcode may overestimate species diversity.
11 citations
Royal Belgian Institute of Natural Sciences1, Royal Museum for Central Africa2, China Agricultural University3, California Department of Food and Agriculture4, University of California, Davis5, Carleton University6, Agriculture and Agri-Food Canada7, Leibniz Institute for Neurobiology8, University of Antwerp9
TL;DR: The objectives of the current study are to assemble the mitogenomes of five Afrotropical Eristalinus species (belonging to two subgenera), infer their phylogenetic relationships and measure the informativeness of each mitochondrial protein coding gene (PCG) and rRNA gene for the resolution of phylogenetic Relationship remain unknown.
Abstract: The hoverfly genus Eristalinus (Diptera, Syrphidae) contains many widespread pollinators. The majority of the species of Eristalinus occur in the Afrotropics and their molecular systematics still n...
11 citations
TL;DR: Melarhaphe neritoides seems to be panmictic over the entire NEA, which is consistent with its long-lived pelagic larval stage, and the combined use of φST and DEST can provide a reasonable inference of connectivity patterns from hyperdiverse mtDNA, too.
Abstract: Hyperdiverse mtDNA with more than 5% of variable synonymous nucleotide sites can lead to erroneous interpretations of population genetic differentiation patterns and parameters (φST, DEST). We illustrate this by using hyperdiverse mtDNA markers to infer population genetic differentiation and connectivity in Melarhaphe neritoides, a NE Atlantic (NEA) gastropod with a high dispersal potential. We also provide a recent literature example of how mtDNA hyperdiversity may have misguided the interpretation of genetic connectivity in the crab Opecarcinus hypostegus. mtDNA variation surveyed throughout the NEA showed that nearly all M. neritoides specimens had haplotypes private to populations, suggesting at first glance a lack of gene flow and thus a strong population genetic differentiation. Yet, the bush-like haplotype network, though visually misleading, showed no signs of phylogeographic or other haplotype structuring. Coalescent-based gene flow estimates were high throughout the NEA, irrespective of whether or not mtDNA hyperdiversity was reduced by removing hypervariable sites. Melarhaphe neritoides seems to be panmictic over the entire NEA, which is consistent with its long-lived pelagic larval stage. With hyperdiverse mtDNA, the apparent lack of shared haplotypes among populations does not necessarily reflect a lack of gene flow and/or population genetic differentiation by fixation of alternative haplotypes (DEST ≈ 1 does not a fortiori imply φST ≈ 1), but may be due to (1) a too low sampling effort to detect shared haplotypes and/or (2) a very high mutation rate that may conceal the signal of gene flow. Hyperdiverse mtDNA can be used to assess connectivity by coalescent-based methods. Yet, the combined use of φST and DEST can provide a reasonable inference of connectivity patterns from hyperdiverse mtDNA, too.
7 citations
TL;DR: Phylogenetic inferences suggests that the earliest split in Baikalodrilus and the time of divergence of most lineages corresponding to species are consistent with the hypothesis of a general rearrangement of theBaikal fauna, following major environmental changes due to a general cooling in the Early Pleistocene.
5 citations
TL;DR: The historic and current taxonomic situation is summarized and explained, the problems and issues raised here are experienced by researchers working on many taxa; the present work seeks to clarify the general taxonomic landscape for non-taxonomists.
3 citations
01 Jan 2019
3 citations
TL;DR: The first anatomical descriptions of the reproductive apparatus, pallial system and radula of Helix capitium Benson, 1848 and Helix onestera Mabille, 1887, the respective type species of Ganesella and Globotrochus are provided.
Abstract: The taxonomy of the speciose genus Ganesella W.T. Blanford, 1863 and the endemic genus Globotrochus Haas, 1935 is unclear since the anatomical characters of the the type species of these two genera have never been reported before. Therefore, the present paper provides the first anatomical descriptions of the reproductive apparatus, pallial system and radula of Helix capitium Benson, 1848 and Helix onestera Mabille, 1887, the respective type species of Ganesella and Globotrochus. In addition, Ganesella rhombostoma (Pfeiffer, 1861) and Ganesella carinella (Mollendorff, 1902) from Thailand are re-described, and a new species, Ganesella halabalah Sutcharit & Panha, sp. nov., from southern Thailand is described. This new species differs from all others by having a larger shell, an obtuse apex and an aperture lip with a prominent beak-like deflection.
2 citations