Broad-Scale Climatic Gradients Drive Multiple Facets of Scorpion Beta Diversity in Northeastern Brazil

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  Broad-Scale Climatic Gradients Drive Multiple Facets of Scorpion Beta Diversity in Northeastern Brazil ABSTRACT Aim Beta diversity analyses clarify mechanisms structuring ecological communities, but their multidimensional facets remain poorly explored in arthropods. Here, we quantified taxonomic, phylogenetic, and functional beta diversity in scorpions, partitioned these facets into species replacement and richness differences, and evaluated the relative importance of spatial structure and environmental conditions in driving community assembly. Location Northeastern Brazil, South America. Taxon Scorpions (Arachnida: Scorpiones). Methods Taxonomic beta diversity was estimated using species presence across 70 sites in northeastern Brazil. Phylogenetic turnover was calculated from a multi-locus molecular tree, and functional beta diversity was derived from morphometric and ecological traits. All beta diversity facets were decomposed into replacement and richness-difference component...

Paranita, a new genus of spiders from northeastern Argentina (Araneae, Trachelidae)

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Paranita, a new genus of spiders from northeastern Argentina (Araneae, Trachelidae)

Abstract


Paranita, a new spider genus in the family Trachelidae, is described with two new species, Paranita paulae sp. n. and Paranita inesae sp. n., both from grasslands and marshes of the Paraná and Uruguay Rivers in northeastern Argentina. Paranita species are similar to those of the genera Orthobula and Capobula in having abundant spines on the tibia, metatarsus and tarsus of the two pairs of anterior legs, as well as large pores on the surface of the carapace and a peculiar morphology of the claw lever of the legs. Phylogenetic analysis of molecular sequences and morphological data suggests that Paranita is not closely related to those genera and, therefore, these similarities would be evolutionary convergences.

RAMÍREZ, Martín J.; GRISMADO, Cristian. Paranita, a new genus of spiders from northeastern Argentina (Araneae, Trachelidae). Revista del Museo Argentino de Ciencias Naturales nueva serie, [S.l.], v. 26, n. 1, p. 47-68, may. 2024. ISSN 1853-0400. Available at: <http://revista.macn.gob.ar/ojs/index.php/RevMus/article/view/824>. Date accessed: 28 May. 2024.