Publications by authors named "Lemarcis Thomas"
The exon capture approach allows for sequencing a large number of loci to reconstruct phylogenetic relationships at varying taxonomic levels. In order to efficiently recover the targeted loci, the probes designed to capture the exons need to be genetically sufficiently similar to bind to the DNA, with a proposed limit of 10% of divergence. However, this threshold has never been tested with a specific protocol.
View Article and Find Full Text PDFArticle Synopsis
- - Neogastropoda is a diverse order of over 15,000 marine species that are significant for both ecological functions and the economies of coastal regions, but their evolutionary relationships are complex and poorly understood due to a dense "bush" in their evolutionary tree.
- - The study utilized various phylogenetic methods and a comprehensive dataset of 1,817 genetic loci from 112 taxa to analyze relationships within Neogastropoda, confirming the monophyly of several superfamilies while revealing that some currently recognized groups are paraphyletic.
- - Three major uncertainties were identified in the phylogenetic relationships, particularly concerning the placement of the Cancellariidae family, which could hint at deeper evolutionary interventions,
Article Synopsis
- The Neogastropoda includes over 15,000 marine predator species, but their evolutionary relationships and classification are largely unclear.
- Researchers created a new molecular phylogeny using mitochondrial genomes and transcriptomic data from various neogastropod families, leading to the analysis of 113 taxa with multiple evolutionary models to construct phylogenetic trees.
- Despite revealing new relationships and insights, the study notes that key taxa are missing and suggests that alternative methods, like reduced-genome strategies, might be necessary for a complete understanding of neogastropod phylogeny.
We determined the complete sequence of the mitochondrial DNA (mtDNA) of a parasite discovered between the subcutaneous tissue and the peritoneum of an African nocturnal non-human primate (NHP). The parasite and host sequences were obtained by a combination of Sanger sequencing and nanopore MinION techniques. Analyses of mtDNA gene arrangements and sequences unambiguously showed that the parasite investigated was the pentastomid Armillifer armillatus, also commonly named the tongue worm.
View Article and Find Full Text PDFArticle Synopsis
- * Out of 315 fecal samples analyzed, 121 showed significant genetic similarity to known Onchocercidae species, with the cox1 gene providing better results for further genetic analysis than the 12S rDNA gene.
- * The findings indicated that filarial DNA detection in gorillas was significantly associated with co-infections from nematodes Oesophagostomum sp. and Necator sp., marking the study as the
Article Synopsis
- The land planarian Endeavouria septemlineata was discovered in Tahiti, French Polynesia, from a single specimen collected in 2017.
- Identification was confirmed through both its external and internal features as well as DNA analysis using COI sequencing.
- This discovery is significant for conservation efforts because the species plays a role as a predator of soil-dwelling animals.
Article Synopsis
- The study examined the prevalence of Ebola virus antibodies in bats across Africa from 2015-2017 to understand their role in Ebola ecology.
- A total of 4,022 bat blood samples were tested, revealing low seroprevalence rates for Zaire and Sudan Ebola viruses in various bat species.
- No viral RNA was found in a subset of samples, highlighting the need for ongoing surveillance of bats to help predict and prevent future Ebola outbreaks.