Atemnus politus
Creators: name: Hu, Jun-fang
name: Zhang, Feng
Publisher: name: Zenodo
Year: 2012
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Pseudoscorpiones
Atemnidae
Atemnus
Atemnus politus

description: <i>Atemnus politus</i> (Simon, 1878) (Image 1, Fig. 1) For synonymies see Harvey (2011). <b>Material examined:</b> 02.viii.2010, five males (Ps.- MHBU-SX10080201–10080205) and five females (Ps.- MHBU-SX10080206–10080210) from China, Shanxi Province, Licheng City, Huangyadong Forest Park (36.800 N &amp; 113.450 E), 757m, coll. Sheng-tao Guo leg. <b>Diagnosis:</b> <i>Atemnus politus</i> is characterized by the granulate medial face of the pedipalpal femur and patella, the presence of a round dorsal tubercle on the trochanter, and the relatively small size of chela with pedicel (male 1.15–1.33 mm, female 1.30–1.35 mm). <b>Description:</b> Pedipalps and the anterior half of carapace deep brown, tergites yellow (Image 1). Setae on body and legs apically dentate. Carapace smooth (Fig. 1A), without furrow and longer than broad (1.12 × in male and 1.04–1.07 × in female); with distinct eyespots; 38–42 setae in total, of which 6 on anterior margin and 6–8 on posterior margin; the anterior half darker than the posterior half. Abdomen tergites IV–X incompletely divided, half-tergites with 4–6 marginal setae. Tergal chaetotaxy: 6–8: 6–8: 8: 10–12: 10–11: 10–11: 11–12: 12: 12: 10–12 (4T): 8 (2T): 2; sternites IV–VIII divided, half-sternites with 5–8 setae, sternal chaetotaxy (IV–XI): 9–11: 11–14: 12–13: 12–14: 12–14: 12–15: 10–12 (4T): 8–10 (4T): 2. Anterior genital operculum of male (Fig. 1J) with 9–10 setae on each side and 10 on posterior margin; that of female (Fig. 1H) with 10–12 setae on anterior genital operculum and 2–3 lyrifissures, and with 9–10 setae on posterior margin. Male genital structure (Fig. 1K): the distal part (l) of lateral apodemes is relatively smaller, and the hooked branch (b) is bowed distally and terminates in a plate-like tip, the proximal part has a distinct dark sclerotized bar (c); the longitudinal fold of medial diverticula (d) has a projection midway along its length; the ejaculatory canal atrium (e) not well-developed; the lateral rods (f) long and diverging proximally; the tip of dorsal apodeme (g) completely joined; the ventral diverticulum (h) bilobed. Female genital structure (Fig. 1D) simple, spermathecae provided with separated median cribriform plates. Cheliceral hand with four setae, <i>bs</i> and <i>es</i> short and finely dentate, and <i>is</i> and <i>ls</i> long and acute, fixed finger with four retrorse teeth and three small apical teeth, movable finger with a long, tooth-like subapical lobe, male galea (Fig. 1B) relatively short and with six branchelets and female galea (Fig. 1C) long and with 5–6 distinct branchelets, of which the basal one rebranched, serrula exterior 21–25 lamellae, rallum of four setae, only the distal one dentate anteriorly. Pedipalp: trochanter 1.72–1.74, femur 2.50–2.67, patella 2.19–2.23, chela with pedicel 3.03–3.09, chela without pedicel 2.82–2.91, hand without pedicel 1.68–1.70 × longer than broad, and movable finger 0.59–0.71 × longer than hand (female trochanter 1.43–1.50, femur 2.67–2.86, patella 1.97–2.09, chela with pedicel 2.70–2.77, chela without pedicel 2.46– 2.55, hand without pedicel 1.50–1.55 × longer than broad, and movable finger 0.75–0.77 × longer than hand). The prolateral face of pedipalpal femur and patella strongly granulate (Figs. 1E–F); trochanter with distinct round dorsal protuberance, fixed finger (Fig. 1G) with 29–30 cusped marginal teeth, movable finger with 35 marginal teeth, venom duct short, ramosus nodus between trichobothria <i>et</i> and <i>it</i>, but near <i>et</i>. Trichobothrial pattern: <i>st</i> on movable finger nearly between <i>t</i> than <i>sb</i>; on fixed finger distance of <i>est</i> removed from <i>esb</i> same as <i>ist</i> and <i>isb</i>, <i>it</i> from finger tip nearly equals to distance between <i>ist</i> and <i>isb</i>. Legs fairly stout, without granular, claws simple and longer than arolia, subterminal seta acute and curved. Tactile seta on tarsus IV (Fig. 2I) situated near the base (TS = 0.12). <b>Dimensions (length/breadth or depth, in mm):</b> Male. Body length: 2.55–2.61. Carapace 0.75–0.84 / 0.67–0.75 (1.12); pedipalp: trochanter 0.40–0.43 / 0.23–0.25 (1.72–1.74), femur 0.70–0.80 / 0.28–0.30 (2.50–2.67), patella 0.70–0.78 / 0.32–0.35 (2.19–2.23), chela with pedicel 1.15–1.33 / 0.38–0.43 (3.03–3.09), chela without pedicel 1.07–1.25 (2.82–2.91), hand without pedicel 0.64–0.73 (1.68–1.70), movable finger length 0.43–0.52 (0.59–0.71 × hand); leg I: femur 0.23–0.25 / 0.15–0.18 (1.39–1.53), patella 0.38–0.40 / 0.14 – 0.18 (2.22–2.71), tibia 0.40 / 0.10–0.11 (3.64– 4.00), tarsus 0.38 – 0.40 / 0.08–0.10 (4.00–4.75); leg IV: femur + patella 0.70–0.80 / 0.23–0.25 (3.04–3.20), tibia 0.53–0.60 / 0.15–0.18 (3.33–3.53), tarsus 0.40– 0.43 / 0.10–0.12 (3.58–4.00). Female. Body length: 3.38–3.47. Carapace 0.80 / 0.75–0.77 (1.04–1.07); pedipalp: trochanter 0.42– 0.43 / 0.28–0.30 (1.43–1.50), femur 0.80 / 0.28–0.30 (2.67– 2.86), patella 0.73–0.75 / 0.35–0.38 (1.97–2.09), chela with pedicel 1.30–1.35 / 0.47–0.50 (2.70–2.77), chela without pedicel 1.20–1.23 (2.46–2.55), hand without pedicel 0.73–0.75 (1.50–1.55), movable finger length 0.55–0.58 (0.75–0.77 × hand); leg I: femur 0.28–0.35 / 0.15–0.18 (1.87–1.94), patella 0.38–0.40 / 0.15–0.18 (2.22–2.53), tibia 0.38–0.43 / 0.10–0.13 (3.31–3.80), tarsus 0.33–0.40 / 0.08–0.10 (4.00–4.13); leg IV: femur + patella 0.73–0.80 / 0.23–0.25 (3.17–3.20), tibia 0.55–0.60 / 0.15–0.18 (3.33–3.67), tarsus 0.43– 0.45 / 0.10–0.12 (3.75–4.30). <b>Distribution:</b> China (Shanxi). <b>Habitat:</b> The specimens of <i>A. politus</i> were collected from leaf litter in a temperate deciduous forest. <b>Remarks:</b> <i>Atemnus politus</i> was first reported from China by Beier (1967). The male genital structures of the specimens from Shanxi Province fit <i>A. politus</i> illustrated by Klausen (2005). In addition, the dimensions and proportions are rather consistent with those of <i>A. politus</i> given by Beier (1932a, b; 1963) and Dashdamirov &amp; Schawaller (1992). Based on the external morphological characters and male genital characters, we believe the material from Shanxi, China belonging to <i>A. politus</i>.
description: Published as part of <i>Hu, Jun-fang &amp; Zhang, Feng, 2012, Notes on two species of the genus Atemnus Canestrini (Pseudoscorpiones: Atemnidae) from China, pp. 3059-3066 in Journal of Threatened Taxa 4 (11)</i> on pages 3060-3062, DOI: 10.11609/JoTT.o3049.3059-66, http://zenodo.org/record/5092442
description: {"references": ["Beier, M. (1967). Pseudoscorpione vom kontinentalen Sudost- Asien. Pacific Insects 9: 341 - 369.", "Beier, M. (1932 a). RevisionderAtemnidae (Pseudoscorpionidea). Zoologische Jahrbucher, Abteilung fur Systematik, Okologie und Geographie der Tiere 62: 547 - 610.", "Dashdamirov, S. &amp; W. Schawaller (1992). [Pseudoscorpions of the Caucasian fauna (Arachnida Pseudoscorpionida)]. Arthropoda Selecta 1 (4): 31 - 72."]}