4 Works

Phylogenomics of scorpions reveal a co-diversification of scorpion mammalian predators and mammal-specific sodium channel toxins

Carlos Santibanez, Shlomi Aharon, Jesús Ballesteros, Guilherme Gainett, Caitlin Baker, Edmundo González-Santillán, Mark Harvey, Mohamed Hassans, Ali Abu-Almaaty, Shorouk Aldeyarbi, Lionel Monod, Andrés Ojanguren-Affilastro, Robert Raven, Ricardo Pinto Da Rocha, Yoram Zvik, Efrat Gavish-Regev & Prashant Sharma
Scorpions constitute a charismatic lineage of arthropods and comprise more than 2,500 described species. Found throughout various tropical and temperate habitats, these predatory arachnids have a long evolutionary history, with a fossil record that began in the Silurian. While all scorpions are venomous, the asymmetrically diverse family Buthidae harbors nearly half the diversity of extant scorpions, and all but one of the 58 species that are medically significant to humans. Many aspects of scorpion evolutionary...

A test of the riverine barrier hypothesis in the largest subtropical river basin in the neotropics

Leonardo Campagna, Cecilia Kopuchian, Darío A. Lijtmaer, Gustavo S. Cabanne, Natalia C. García, Pablo D. Lavinia, Pablo L. Tubaro, Irby Lovette & Adrián S. Di Giacomo
The riverine barrier hypothesis proposes that large rivers represent geographic barriers to gene flow for terrestrial organisms, leading to population differentiation and ultimately allopatric speciation. Here we asses for the first time if the subtropical Paraná-Paraguay River system in the Del Plata basin, second in size among South American drainages, acts as a barrier to gene flow for birds. We analyzed the degree of mitochondrial and nuclear genomic differentiation in seven species with known subspecies...

Phylogeny of the Eocene Antarctic Tapetinae Gray, 1851 (Bivalvia: Veneridae) from the La Meseta and Submeseta formations

Maximiliano Jorge Alvarez
Systematic analysis shows that the Southern Hemisphere bivalve genus Retrotapes includes the Antarctic species R. antarcticus, R. newtoni, and R. robustus and recognizes for the first time the presence of Katelysia represented by K. florentinoi. Two new genera were erected in this study: Marciachlys new genus to include M. inflata new combination, and Adelfia new genus, which includes A. austrolissa new combination and A. omega new species from the Eocene of Antarctica, and the late...

The ontogenetic pattern of neurocentral suture closure in the axial skeleton of Hyperodapedontinae (Archosauromorpha: Rhynchosauria) and its evolutionary implication

Clara Heinrich, Voltaire Paes Neto, Marcel Lacerda, Agustin Martinelli, Maico Fiedler & Cesar Schultz
Understanding ontogeny of a taxon is a crucial step to properly elucidate its taxonomy and evolution. However, aside from histological data, osteological criteria for assessing maturity are considered lineage specific or controversial. The sequence of neurocentral suture closure of the axial skeleton of extant crocodilians, which occurs in a postero-anterior sequence, has being used as a non-destructive method to determine maturity in extinct reptiles. However, the use of this criterion in extinct archosaurs not closely...

Registration Year

  • 2020

Resource Types

  • Dataset


  • Bernardino Rivadavia Natural Sciences Museum
  • National University of the Littoral
  • Western Australian Museum
  • Eastern Connecticut State University
  • National Autonomous University of Mexico
  • Port Said University
  • University of Wisconsin-Madison
  • Queensland Museum
  • University of Sao Paulo
  • National Scientific and Technical Research Council