Description of a new species of the genus Anatemnus Beier , 1932 ( Pseudoscorpiones : Atemnidae ) from China

A new pseudoscorpion species, Anatemnus reni sp. nov., belonging to the family Atemnidae Kishida, 1929, is reported from Yunnan Province, Southwest China. The detailed diagnosis, description and illustrations of important morphological characters are presented in this paper.


Introduction
The pseudoscorpion family Atemnidae Kishida, 1929 contains two subfamilies: Atemninae and Miratemninae.The genus Anatemnus Beier, 1932 belongs to the subfamily Atemninae.It was erected by Beier (1932b) for the species Chelifer javanus Thorell, 1883, and currently includes 21 known species which are widespread in Africa, North America, South America, Australia and Asia (Hu and Zhang 2012;Harvey 2013;Alexander et al. 2014).More than half of the species (12) are distributed in Southeast Asia, and only two, A. chaozhouensis Hu andZhang, 2012 andA. orites (Thorell, 1889), have been recorded in China (Hu and Zhang 2012;Harvey 2013).
While examining pseudoscorpion samples collected under bark from Yunnan Province, China, we found one atemnid specimen which conforms to the following generic characters of Anatemnus: distance between trichobothrium it and fingertip equals that between ist and isb; distance between est and esb longer than that between ist and isb; pedipalpal patella not evidently expanded and nearly oval (Beier 1932a;Hu and Zhang 2012).For these reasons we placed it within the genus Anatemnus as a new species.The aim of the current study is to describe and diagnose the new pseudoscorpion species.

Material and Methods
The material was preserved in 75% ethyl alcohol.Photographs were taken by a Leica M205a stereomicroscope equipped with a Leica DFC550 camera and using a LAS software (Ver.4.6), from which the latter was also used for drawings (with a drawing tube) and measurements.Detailed examination was carried out with an Olympus BX53 compound light microscope.Temporary slide mounts were made in glycerol.The specimens are deposited in the Museum of Hebei University (MHBU), Baoding City, China.
Terminology and mensuration mostly follow Chamberlin (1931), with some minor modifications to the terminology of trichobothria (Harvey 1992), chelicerae (Judson 2007) and faces of appendages (Harvey et al. 2012).The chela and chelal hand are measured in lateral view.All measurements are given in mm unless noted otherwise.
Fixed chelal finger with eight trichobothria, whilst movable chelal finger with four trichobothria (Fig. 3g): eb, esb, ib and isb grouped and situated basally; esb in the middle between eb and isb; ist near to it, near the middle of fixed finger; est in the middle of fixed finger; ist distal to isb and est; et near sub-distal end of fixed finger; sb closer to b than to st; t slightly closer to st than to tip of movable finger; with no microsetae present on both fingers.Venom apparatus present only in fixed finger, venom ducts short and slender.Fixed finger with 28-29 pointed teeth, while movable finger with 35-36 pointed teeth except basally, where teeth are obtuse; with one accessory tooth in tip of fixed finger.
Carapace (Fig. 2a, 3a).Smooth, 1.35 times as long as broad; anterior half of the carapace reddishbrown, remaining part yellowish-brown; without transverse furrow; with a pair of eyespots situated near anterior margin of carapace; with ca.45 setae in total, including two on anterior and 10 on posterior margin; with two pairs of lyrifissures (indicated by black bars in Fig. 3a).Manducatory process with one long seta and three short setae.
Distribution.Southwest China (Yunnan), near to Laos borders, under bark.