TL;DR: This is one of the few studies to demonstrate specific relationships between jumping spiders and a particular plant type and plant size and density of bromeliad density.
Abstract: The jumping spiders Eustiromastix nativo, Psecas sumptuosus, and Uspachus sp. n. (Salticidae) live on terrestrial bromeliads in areas with different phytophysiognomies in southeastern and northeastern Brazil. To understand these spider–plant interactions, we investigated if (1) these spiders were associated specifically with bromeliads, (2) the spiders utilized particular bromeliad species, and (3) plant size and density of bromeliads affected spider distribution. The jumping spiders were not found outside bromeliads, indicating a strict spider–plant association. Eustiromastix and Uspachus occupied bromeliads in open areas, whereas Psecas was found on forest bromeliads. Eustiromastix occurred at a higher frequency on larger bromeliads and in patches with higher bromeliad density. This is one of the few studies to demonstrate specific relationships between jumping spiders and a particular plant type.
TL;DR: Eustiromastix nativo new species was described and illustrated based on specimens collected from bromeliads in northeastern and southeastern Brazil as mentioned in this paper, which is a new species of bromelia.
Abstract: Eustiromastix nativo new species is described and illustrated based on specimens collected from bromeliads in northeastern and southeastern Brazil.
TL;DR: The doubtful species status of E. guianae is validated with redescriptions of (supposedly lost) type and holotype males, and a first description of the female, with seventeen new salticid species for French Guiana reported.
Abstract: In this paper, we validate the doubtful species status of E. guianae, with redescriptions of (supposedly lost) type and holotype males, and a first description of the female. Both sexes are measured and illustrated by pictures of habitus and copulatory organs. Seventeen new salticid species for French Guiana are also reported and a detailed catalogue of all salticid species from the Trinite National Nature Reserve is provided.
TL;DR: The results show that several jumping spider species may be strictly associated with the Bromeliaceae in the Neotropics, one of the few studies to show host-specific associations for spiders on a particular plant type over a wide geographic range.
Abstract: Although spiders are a very diverse group on vegetation, their associations with plants are poorly known. Some salticid species specifically use Bromeliaceae as host plants in some regions of South America. In this study, I report the geographic range of these spider-bromeliad associations, and whether the spiders inhabit particular bromeliad species and vegetation types, as well as open areas or interior of forests. Nine salticid species were found to be associated with up to 23 bromeliad species in cerrados (savanna-like vegetation), semideciduous and seasonal forests, coastal sand dune vegetation, restingas, inselbergs, highland forests, chacos, and rain forests at 47 localities in Brazil, Paraguay, Bolivia, and Argentina. Some species were typically specialists, inhabiting almost exclusively one bromeliad species over a large geographic range (e.g., Psecas chapoda on Bromelia balansae), whereas others were generalists, occurring on up to 7-8 bromeliad species (e.g., Psecas sp., Eustiromastix nativo, and Coryphasia sp. 1). The regional availability of bromeliad species among habitats may explain this pattern of host plant use. More jumping spiders were found on bromeliads in open areas than on bromeliads in the interior of forests. These results show that several jumping spider species may be strictly associated with the Bromeliaceae in the Neotropics. This is one of the few studies to show host-specific associations for spiders on a particular plant type over a wide geographic range.