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Rejection of the concept of hemiurid genus Pulmovermis (Digenea: Hemiuridae) and other taxonomic propositions: new morphological and molecular data regarding Lecithochirium cyanovitellosum (Coil and Kuntz, 1960) Urabe and Sokolov, comb. nov. (formerly Pulmovermis cyanovitellosus).
Syst Parasitol
January 2025
A.N. Severtsov Institute of Ecology and Evolution RAS, Moscow, Russia.
Pulmovermis cyanovitellosus Coil and Kuntz, 1960 is a species of hemiurid trematode that localizes in the lung of sea snakes, an unusual trait for this group of parasites. Recent molecular phylogenetic studies based on 28S rRNA gene sequences have shown that this species is closely related to members of the genus Lecithochirium Lühe, 1901. This finding is unexpected given that Pulmovermis Coil and Kuntz, 1960 and Lecithochirium are currently classified in different subfamilies of Hemiuridae (Pulmoverminae Sandars, 1961 vs.
View Article and Find Full Text PDFAntimatter in astronomy and cosmology: the early history.
Ann Sci
January 2025
Niels Bohr Institute, Copenhagen University, Copenhagen, Denmark.
So-called antimatter in the form of elementary particles such as positive electrons (antielectrons alias positrons) and negative protons (antiprotons) has for long been investigated by physicists. However, atoms or molecules of this exotic kind are conspicuously absent from nature. Since antimatter is believed to be symmetric with ordinary matter, the flagrant asymmetry constitutes a problem that still worries physicists and cosmologists.
View Article and Find Full Text PDFCranial osteology and neuroanatomy of the late Permian reptile and implications for early reptile evolution.
R Soc Open Sci
January 2025
Department of Biological Sciences, Idaho State University, Pocatello, Idaho, USA.
Millerettidae are a group of superficially lizard-like Permian stem reptiles originally hypothesized as relevant to the ancestry of the reptile crown group, and particularly to lepidosaurs and archosaurs. Since the advent of cladistics, millerettids have typically been considered to be more distant relatives of crown reptiles as the earliest-diverging parareptiles and therefore outside of 'Eureptilia'. Despite this cladistic consensus, some conspicuous features of millerettid anatomy invite reconsideration of their relationships.
View Article and Find Full Text PDFExploring research trends and hotspots on PCSK9 inhibitor studies: a bibliometric and visual analysis spanning 2007 to 2023.
Front Cardiovasc Med
November 2024
Key Laboratory of Prevention and Treatment of Cardiovascular and Cerebrovascular Diseases, Ministry of Education, Gannan Medical University, Ganzhou, China.
Background: Following the identification of proprotein convertase subtilisin/kexin type 9 (PCSK9) inhibitors, research in this area has experienced significant growth. However, a thorough bibliometric analysis of this burgeoning field remains conspicuously absent. The current study aims to delineate research hotspots and anticipate future trends on PCSK9 inhibitors employing bibliometric analysis.
View Article and Find Full Text PDFSkull Ossification in the Andean Toad Rhinella spinulosa (Bufonidae) and the Genetic Model Organism Xenopus tropicalis (Pipidae) Reveals Heterochrony Phenomena and Frontoparietal Suture Modifications.
J Exp Zool B Mol Dev Evol
December 2024
Group for the Study of Developmental Processes (GDeP), School of Biological Sciences, University of Concepción, Concepción, Chile.
Anurans are famous for having evolved a highly simplified skull through bone loss and fusion events. Nevertheless, their skeleton displays a rich morphological diversity associated with adaptations to diverse lifestyles and ecological niches. Here, we report larval skull ossification in the Andean toad Rhinella spinulosa (Bufonidae), and compare it to the phylogenetically distant genetic model organism Xenopus tropicalis (Pipidae).
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