A new species of the genus Malaconothrus ( Acari , Oribatida , Malaconothridae ) from Ecuador

A new species of oribatid mites of the genus Malaconothrus (Oribatida, Malaconothridae) is described from forest litter in Ecuador. Malaconothrus paraweigmanni Ermilov sp. nov. differs from the most similar species, M. weigmanni Colloff, 2013 by the smaller body size, barbed notogastral setae and comparatively long anal setae.


Introduction
This work is a part of my continuing study of the oribatid mite fauna of Ecuador (e.g.Ermilov & Kalúz 2012;Ermilov et al. 2014;2016).The present study includes data on Malaconothridae (Acari, Oribatida).This family comprises two genera and more than 170 species, which has a cosmopolitan distribution collectively (Colloff & Cameron 2013;Subías 2004Subías , online version 2016)).
During taxonomic study of the Ecuadorian malaconothrids, I found one new species belonging to the genus Malaconothrus Berlese, 1904.The main goal of the paper is to describe and illustrate this species under the name M. paraweigmanni Ermilov sp.nov.

Material and Methods
Material.The collection locality and habitat are given in the "Material examined" section.
Methods.Specimens were mounted in lactic acid on temporary cavity slides for measurement and illustration.Body length was measured in lateral view, from the tip of the rostrum to the posterior edge of the ventral plate.Notogastral width refers to the maximum width in dorsal aspect.All body measurements are presented in micrometers.Formulas for leg setation are given in parentheses according to the sequence trochanter-femur-genu-tibia-tarsus (famulus included).Formulas for leg solenidia are given in square brackets according to the sequence genu-tibia-tarsus.
Drawings were made with a camera lucida using a Carl Zeiss transmission light microscope -Axioskop-2 Plus‖.Images were obtained with an AxioCam ICc3 camera using a Carl Zeiss transmission light microscope -Axio Lab.A1‖.
Type deposition.The holotype is deposited in the collection of the Senckenberg Institute, Görlitz, Germany; one paratype is deposited in the collection of the Tyumen State University Museum of Zoology, Tyumen, Russia.
Etymology.The specific name paraweigmanni refers to the similarity between the new species and Malaconothrus weigmanni Colloff, 2013.