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A Complete Skull of an Early Cretaceous Sauropod and the Evolution of Advanced Titanosaurians
TLDR
A new sauropod dinosaur from the Early Cretaceous of Brazil represents the earliest advanced titanosaurian known to date, demonstrating that the initial diversification of advanced titosaurians was well under way at least 30 million years before their known radiation in the latest Cret Jurassic.
Comparative enzymatic composition of Brazilian coral snake (Micrurus) venoms.
TLDR
Venom of M. surinamensis was significantly different from those of its congeners in most assays, and protease activity against synthetic or dyed natural substrates was generally negligible in all elapid venoms examined.
A hyaluronidase from Potamotrygon motoro (freshwater stingrays) venom: isolation and characterization.
TLDR
The P. motoro venom extracted from the sting presented hyaluronidase activity, which was shown to be heat instable, being stabilized by bovine albumin and DTT, and inhibited by Fe(2+), Mn( 2+), Cu(2+) and heparin.
Coral snake bites (Micrurus spp.) in Brazil: a review of literature reports
TLDR
Most coral snake bites reported in Brazil were caused by M. corallinus and M. frontalis, with several patients showing signs of acute myasthenia, with signs of weakness and ptosis that may evolve to paralysis and respiratory failure.
A novel peptide from the ACEI/BPP-CNP precursor in the venom of Crotalus durissus collilineatus.
TLDR
Analysis of a cDNA clone from venom glands of Crotalus durissus collilineatus revealed a nearly identical sequence in the ACEI/BPP-CNP spacer, suggesting that these novel toxins probably activate anaphylatoxin C3a receptors.
A new species of triadal coral snake of the genus Micrurus Wagler, 1824 (Serpentes: Elapidae) from northeastern Brazil.
TLDR
A new species of triadal coral snake from northeastern Brazil is described that appears to be restricted to tropical ombrophilous lowland coastal forests of northeastern Brazil and all recently collected specimens are known to occur in small forest patches surrounded by periurban environment, which calls for an urgent evaluation on its conservation status.
Description of a New Pored Leposternon (Squamata, Amphisbaenidae) from the Brazilian Cerrado
TLDR
The new species of Leposternon is described from the Brazilian Cerrado, Goiás and Minas Gerais states and has the following diagnostic characters: frontal portion of head strongly depressed, pectoral shield modified, autotomic site absent.
A gyroxin analog from the venom of the bushmaster (Lachesis muta muta).
TLDR
Phospholipase assays, LD50 determinations and SDS-polyacrylamide gel electrophoresis indicated the presence of non-toxic phospholipases, but no crotoxin homologs.
Coralsnake Venomics: Analyses of Venom Gland Transcriptomes and Proteomes of Six Brazilian Taxa
TLDR
Phylogenetic analysis indicates that the six Micrurus taxa diverged 15–35 million years ago and that they split from their last common ancestor with Old World elapines nearly 55 million years old, and given their early diversification, many cryptic micrurine taxa are anticipated.
Electrophoretic and immunochemical studies of Micrurus snake venoms.
TLDR
The electrophoretic mobilities of venom components from 15 Micrurus species were studied by polyacrylamide gel electrophoresis and revealed some proteins completely conserved, whereas others exhibited intraspecies variation.
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