The study of soil microarthropod biodiversity is illustrative problems that are related to other organisms (fungi, for instance) or can be found in environments (canopy, oceanic sediments, hosts accommodating parasites, etc.). Indeed, the contribution fauna global remains an enigma even though, recent years, it has received considerable attention. Our contention debate on will remain open – and sterile as long adequate sampling methodologies not set up, critically evaluated largely used....

The discontinuous bark cover formed by epiphytic lichens and algae provides a mosaic of microhabitats for the fauna. Multivariate analyses applied to 1800 samples collected in Belgian Lorraine (southern Belgium) during each four seasons has made it possible distinguish five major classes arthropod microcommunities. Two them are confined special habitats or places at certain seasons, viz. Pseudochermes fraxini (Homoptera) community found on Fraxinus summer, “trophically” different from...

The goal of this paper is to present an overview the genera prostigmatic mite family Tydeidae 60 years after appearance E.W. Baker's seminal on (1965), and define in systematic scientific terms within superfamily Tydeoidea. Cumulative curves are given for genera, species names. number morphospecies estimated be around 11,600 which 3.72% have been described. Evolutionary plasticity a new concept explored. revised considered here contain 31 3 non-nominal subgenera. Nomenclatural changes noted...

SUMMARY A transplant experiment using an animal was carried out for monitoring and mapping air pollution in Brussels during the Winter of 1980. microarthropod, Humerobates rostrolamellatus (Acari: Oribatida), known to be sensitive S02 used as a biological indicator.

The Tydeoidea as a whole (Tydeidae, Iolinidae and Ereynetidae) are analysed cladistically for the first time, based on critical reappraisal of morphological characters. In addition to chaetotaxy, solenidiotaxy poroidotaxy, following characters considered: form dehiscence line; number eyes; presence posterior trichobothrium; discs genital acetabula; breadth cis-acetabulal area; sexual dimorphism (indicative true mating); segmentation legs palps; structure ereynetal organ; shape chelicerae...

The early history of the genus Tydeus, type family Tydeidae, is complex and convoluted and, subsequently, even identity species remains unclear. First, literature thoroughly analysed morphological characters some are reappraised. After studying Oudemans' types, two inquirendae, Tydeus croceus T. cruciatus, redescribed a third, spathulatus, removed from synonymy reinstated as valid species. A fourth species, confused with described. lectotype designated for spathulatus neotype croceus....

We studied adaptations to subterranean environments in Acari. Mite populations of two caves and the mineral horizon soil from three forest sites were analysed. In soil, body length was limited by pore size. The proportions (i) predators, (ii) phoretic mites, (iii) primitive oribatids higher caves. This potentially explained polyphagy or predation on other groups reduced interspecific competition, fragmented structure liability flooding cave habitat, humidity Adaptations dry habitats probably...

Depending on the publication consulted, Dugès' caudatus is a mite listed either in Tenuipalpidae, or Tydeidae, both. The name varies accordingly and species called Tenuipalpus (Dugès, 1834) Tydeus 1834). A transect was conducted laurustinus shrubs (Viburnum tinus) around Montpellier (France) to retrieve described by Dugès. It results that probably Tenuipalpidae not Tydeidae. redescribed from specimens collected neotype deposited Paris. most frequent tydeid observed Viburnum tinus goetzi...

An online database on the taxonomy of Tydeoidea is described and available Wikispecies platform at https://species.wikimedia.org/wiki/Tydeoidea. It counts 1 324 records or pages, 724 for Tydeidae, 334 Ereynetidae, 203 Iolinidae 63 Triophtydeidae. For each taxon are detailed parent taxa as well child which listed. A nec subsection lists names that not recommended. Subjective objective synonymies homonymies given taxon. Notes provide historical aspects past studies. The type locality habitat...

Interpretations of the genus Lorryia Oudemans, 1925 are reviewed together with their respective criteria. After consideration Oudemans' detailed description and previously unavailable plates, unique type specimen (lost ?) is not considered abnormal but rather reveals evolutionary pathways (heterobidactyly, reduction palp chaetotaxy) consistent other Tydeoidea. discussion, re-established in its pristine state remains monospecific (L. superba). The Brachytydeus Thor, 1931 (ca 200 species)...