The genus Icaleptes was proposed by Kury & Pérez-González in 2002 to accommodate a single Colombian species, malkini, collected the southeastern slope of Sierra Nevada de Santa Marta, Cesar Department. In this study, we describe two new species for previously monotypic on northwestern department Magdalena. dimorphicus sp. nov. and armasi were included within based external genital similarities such as male scutum magnum continuously convex lacking sulci; pedipalps with highly reduced setae;...

Stenostygnus martensi spec. nov. and huberi are described from montane localities of the States Mérida Lara in Venezuela, diagnosis previously monotypic genus Simon, 1879, is emended. The presence these two new species as local endemics Andean Venezuela represents a huge range extension for Stenostygnus, also ecologically different known Amazon Basin. This could indicate rich uncharted diversity stenostygnines regions, particularly north South America.

Promecostethus unifalculatus Enderlein, 1909, is the only representative of order Opiliones from Crozet Islands. The species belongs to family Triaenonychidae and biogeographically interesting because it a candidate for transoceanic dispersal, very rare event in this ancient family. Despite significance, P. taxonomically still poorly known, redescription using modern taxonomic standards urgently needed. Here we redescribe species, offer first description illustrations male genitalia provide...

Abstract Mega hydroelectric dams have become one of the main drivers habitat loss in tropical forests, converting large tracts pristine forests into isolated forest islands. Understanding how biodiversity cope with landscape modification these archipelagic landscapes is paramount importance to assess environmental consequences dam infrastructure and propose mitigation actions for conservation. In this context, harvestmen (Opiliones, Arachnida) comprise an excellent indicator taxon quality,...

The genus Nuncia has long been the most speciose within Opiliones family Triaenonychidae, comprising 63 species and subspecies distributed across New Zealand South America. Recent molecular studies utilizing Sanger sequencing ultraconserved elements (UCEs) have indicated that this is not monophyletic, true are actually confined to Zealand. Here, morphology of all American triaenonychids re-examined DNA sequence data compiled from three markers (18S rRNA, 28S rRNA cytochrome c oxidase subunit...

Harvestmen genera with transcontinental distributions are rare but represent very interesting models for evolutionary and biogeographical studies. However, before attempting to understand such distributions, it is crucial have a good taxonomic foundation of the focal taxa. One most disjunct harvestmen NunciaLoman, 1902 (Triaenonychidae), which has been recorded from New Zealand South America, alpha taxonomy in need improvement, mainly respect detailed characterization male genitalic...

Among the Amazonian families of harvestmen members Stygnidae are better known due to recent revision family and efforts specialists describing new taxa in last few years. Species genus Auranus Mello-Leitão, 1941, have been collected several inventories that were carried out different locations Amazon basin. In this paper we provide a diagnosis for Auranus, description two species: leonidas sp. nov. xerxes from Brazilian states Roraima Amazonas, respectively. We also offer complementary...

We describe Avima anitas sp. nov. based on material collected in the Brazilian state of Roraima, representing first record Agoristenidae State. The new species differs externally from other by presenting one proximal tubercle mesal face male cheliceral segment II and a pair dark spots partially covering mesotergal area III-IV. genital ventral small setae plate, which are trifid instead uniramous or bifid.

Procaeculus coineaui sp. nov. from Cretaceous Burmese amber is described and its phylogenetic position discussed. This fossil taxon the first caeculid mite known constitutes earliest record of family. The genus redefined to include new species internal relationships between genera family are discussed based on a hypothesis.

Abstract Phocyx gen. nov. and australis sp. have been newly described from New South Wales, Australia. This represents the first record of family Buemarinoidae in Australia, thereby remarkably extending known distribution this ancient relictual group Opiliones. Our descriptions include images genital morphology, a critical element diagnosis. Additionally, we present discourse on conserved external morphology within Triaenonychoidea underscore significance taxonomy superfamily. Very low...

Triaenonychidae is a family of Opiliones with almost 500 described species distributed in the southern continents. Recent work has provided solid phylogenetic foundation based on Sanger and ultraconserved element molecular sequence data that resulted global reorganisation family. In this study, we turn to South American triaenonychids, aggregating sequences three markers (18S rRNA, 28S rRNA cytochrome c oxidase subunit I), re-examining position additional confirming existence new genus. We...

Abstract Mega hydroelectric dams have become one of the main drivers habitat loss in tropical forests, converting large tracts pristine forests into isolated forest islands. Understanding how biodiversity cope with landscape modification these archipelagic landscapes is paramount importance to assess environmental consequences dam infrastructure and propose mitigation actions for conservation. In this context, harvestmen (Opiliones, Arachnida) comprise a good indicator taxon quality, given...

Ceratomontia starengai sp. nov. is described from South Africa, based on one specimen found in the type series of capensis Roewer, 1915, which redescribed this work. The presence new species represents sympatry species, something not uncommon for family Triaenonychidae. Images genital morphology, are crucial to diagnosis group, included descriptions.