A new species of Surazomus, which belongs to the class Arachnida and the order Schizomida, has been discovered in the eastern Amazon, according to a study published March 20 in the open-access journal PLOS ONE by Gustavo Ruiz and Roberta Valente of the Universidade Federal do Pará in Brazil.
Schizomids are rare, small arachnids that are found in humid tropical and subtropical forests, mainly in leaf litter, caves, tree bark or under stones. They are all known as short-tailed whip scorpions due to the presence of a short flagellum—a lash-like appendage—in males and females. The flagellum of the male is held by the female's chelicerae—appendages in front of the mouth—during copulation in what is known as the mating march. But relatively little is known about the different shapes of male flagellum within Surazomus in terms of evolution, or the mechanism by which the female chelicerae anchor onto the male flagellum.
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