Quantifying the internationalization and representativeness in research.

Author-level performance metrics do not account for collaboration and knowledge transfer between people, institutions, and countries. We propose the i-index and r-index, publication metrics that aim to incentivize the collaboration between researchers and research institutions across borders. These indices promote benefit-sharing among countries of different levels of development.

Sphingomyelinase D Activity in Venom: Toxic Potential and Clues to the Evolution of SMases D in the Sicariidae Family.

The spider family Sicariidae includes three genera, , and . The three genera share a common characteristic in their venoms: the presence of Sphingomyelinases D (SMase D). SMases D are considered the toxins that cause the main pathological effects of the venom, that is, those responsible for the development of loxoscelism.

Searching for the toxic potential of Loxosceles amazonica and Loxosceles willianilsoni spiders' venoms.

The Loxosceles genus belongs to the Sicariidae family and it comprises species whose venom can cause accidents with potentially fatal consequences. We have previously shown that SMase D is the enzyme responsible for the main pathological effects of Loxosceles venom. Despite the severity of accidents with Loxosceles, few species are considered to be of medical importance.

Description of the male of the Critically Endangered tarantula Bertani, 2012 (Araneae, Theraphosidae), with comments on tarantula trade and conservation.

The genus C.L. Koch, 1850 consists of five small size arboreal tarantula species with remarkable colored abdominal patterns and a very restricted geographic range in Brazil.

Global wildlife trade permeates the Tree of Life.

Legal and illegal wildlife trade is a multibillion dollar industry that is driving several species toward extinction. Even though wildlife trade permeates the Tree of Life, most analyses to date focused on the trade of a small selection of charismatic vertebrate species. Given that vertebrate taxa represent only 3% of described species, this is a significant bias that prevents the development of comprehensive conservation strategies.

Two new species of Guyruita Guadanucci et al., 2007 (Araneae, Theraphosidae) from Brazil.

Guyruita Guadanucci et al., 2007 is an ischnocoline genus with three described species from Brazil and Venezuela. Two new Brazilian species from the states of Rio Grande do Norte (Guyruita isae n.

Spiders of the São Paulo state islands, Brazil: redescription of (Mello-Leitão, 1923) n. comb. (Araneae, Nemesiidae).

Spiders of the islands on the coast of the state of São Paulo, Brazil are poorly known. Herein, we redescribe and discuss the taxonomic position of Psalistops crassimanus Mello-Leitão, 1923, described from Alcatrazes Island and formerly included in the Barychelidae. This species is, herein, transferred to the genus Stenoterommata Holmberg, 1881, Nemesiidae, and the new combination Stenoterommata crassimana (Mello-Leitão, 1923) n.

Two new Brazilian species of Heinecken & Lowe, 1832 with remarks on and groups (Araneae, Sicariidae).

The genus Heinecken & Lowe, 1832 has 91 representatives in the New World. Despite medical relevancy, the taxonomy of the genus is poorly understood. South American were divided into four groups of species: , , and ; this last one has a single species, Gertsch, 1967.

Taxonomic revision and cladistic analysis of Lamarck, 1818 (Araneae, Theraphosidae, Aviculariinae) with description of three new aviculariine genera.

The genus Lamarck, 1818 is revised and all species are rediagnosed. The type species, described as Linnaeus, 1758, is the oldest mygalomorph species described and its taxonomic history is extensive and confusing. Cladistic analyses using both equal and implied weights were carried out with a matrix of 46 taxa from seven theraphosid subfamilies, and 71 morphological and ecological characters.