ABSTRACT A phylogenetic analysis of the two-clawed spiders grouped in Dionycha is
presented, with 166 representative species of 49 araneomorph families, scored for 393 …

An updated and extensively revised checklist of the arthropods of Hispaniola (Dominican
Republic and Haiti) is presented 11 years after the publication of the original in 2008. It …

Fossil spiders have not been fully cataloged since Bonnet's Bibliographia Araneorum and
are not included in the current Catalog. Since Bonnet's time there has been considerable …

South America is the fourth largest continent on the planet; its birds, mammals, and
amphibian's biodiversity is relatively well known, but no outright assessment of the continent …

A cladistic phylogenetic analysis at generic level of the subfamily Amaurobioidinae is
presented. The analysis is based on a dataset of 93 representative species scored for one …

Type specimens are the core of taxonomical studies, unfortunately, many taxonomists in the
1800s did not officially designate type specimens nor type deposition institutions …

Background The IUCN Red List of Threatened Species is the most widely used information
source on the extinction risk of species. One of the uses of the Red List is to evaluate and …

Sperm transfer in spiders is achieved by copulatory organs on the male pedipalps (ie,
copulatory bulbs), which can be simple or a complex set of sclerites and membranes. During …

A check list of the Araneae type specimens deposited in the Museu Nacional, Universidade
Federal do Rio de Janeiro, is given, including also all the type specimens of species …

The rhythm of biodiversity loss vastly surpasses the number of new species described per
year, with several taxa going extinct without us even knowing about their existence. After …