Anatemnus reni, Gao & Zhang & R. & ., 2016

Gao, Zhizhong & Zhang, Feng, 2016, Description of a new species of the genus Anatemnus Beier, 1932 (Pseudoscorpiones: Atemnidae) from China, Ecologica Montenegrina 7, pp. 567-572 : 568-571

Anatemnus reni sp. nov.

( Figs. 1–3 )

Type material. Holotype male (Ps.– MHBU – YN070803 ): China, Yunnan Province, Xishuangbanna Dai Autonomous Prefecture, Mengla County, Mohan Town ( Now called Shangyong Town ), under bark [N21°14′38.20″ E101°43′27.08″], 3,205 m a.s.l., 3 August 2007, Guodong Ren leg.

Etymology. The new species is named after Prof. Dr. Guodong Ren, who collected and donated the specimen to the author of this study.

Diagnosis. The new species differs from most congeners by the presence of two well-developed conical tubercles on pedipalpal trochanter ( Beier 1932a; With 1906, 1908), while from the morphologically closest species ( Anatemnus elongatus (Ellingsen, 1902) , A. rotundus ( With, 1906) , A. vermiformis ( With, 1906) and A. voeltzkowi (Ellingsen, 1908)) differs by the bicolor carapace, the gaping pedipalpal chelal fingers, the grouped trichobothria eb, esb, ib and isb situated basally and the widely spaced trichobothria it and isb.

Description. Body moderately flattened. Pedipalps and anterior half of carapace reddish-brown, legs, tergites and sternites yellowish-brown. Body setae straight, acuminate and short ( Fig. 1 ).

Each chelicera with four setae on hand (sbs absent) ( Fig. 3b ), surface smooth. Movable finger with one sub-distal seta. Trichobothria bs and es finely dentated, is and ls long and acute. Movable finger with 2-3 tiny teeth distally, while fixed finger with 4-5 moderately-sized pointed teeth. One lyrifissure present on fixed finger basally ( Fig. 3b ); galea with a bifurcate tip and one small sub-median ramus ( Fig. 3d ); rallum composed of four blades, only the distal one dentated anteriorly ( Fig. 3c ); serrula exterior with 23-24 blades; lamina exterior present, moderately broad.

Pedipalp. Mostly smooth; setae moderately long and acicular. Trochanter elongated, with two well-developed conical tubercles ( Fig. 2d , 3e ); both chelal fingers gaping ( Fig. 3g ); trochanter 1.36, femur 2.72, patella 2.48, chela (with pedicel) 3.35, chela (without pedicel) 3.12, hand (with pedicel) 2.19, hand (without pedicel) 1.96 times as long as broad, movable finger 0.58 times as long as hand with pedicel. Femur without long tactile setae.

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 reddish-brown, 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.

Abdomen. Pleural membrane longitudinally striate. Tergites divided except the first three, sternites unconspicuously divided. Tergal chaetotaxy (I-XI): 9: 10: 10: 7-8: 7-7: 8-7: 7-8: 8-9: 8-12: 8-10: 11 + 2T; all setae acicular. Sternal chaetotaxy (IV-XI): 7-8: 8-9: 9-9: 7-9: 8-9: 8-9: 10-10: 14 + 2T; setae uniseriate and acuminate; each tergite and sternite with 2-4 lyrifissures; male genital area as in the Fig. 2e ; glandular setae absent, but some tactile spots present; anus with four setae, not surrounded by sternite XI.

Legs ( Figs. 2g, 2h , 3i, 3j ). The junction between femora and patellae I and II oblique; femur + patella of leg IV 2.79 times as long as broad; tactile seta on tarsus IV ( Fig. 3h ) situated proximally (TS = 0.15); sub-terminal tarsal setae curved and apically acute; arolium undivided, clearly shorter than smooth and large claws.

Measurements (length/breadth or height in mm, ratios in parentheses). Body length 4.68. Pedipalps: trochanter 0.64/0.47 (1.36), femur 1.25/0.46 (2.72), patella 1.24/0.50 (2.48), chela (with pedicel) 1.91/0.57 (3.35), chela (without pedicel) 1.78 (3.12), hand length (with pedicel) 1.25 (2.19), hand length (without pedicel) 1.12 (1.96); movable finger length 0.73. Carapace 1.27/0.94 (1.35). Leg I: trochanter 0.23/0.21 (1.10), femur 0.37/0.25 (1.48), patella 0.59/0.24 (2.46), tibia 0.54/0.17 (3.18), tarsus 0.40/0.12 (3.33); leg IV: trochanter 0.39/0.23 (1.70), femur + patella 1.09/0.39 (2.79), tibia 0.76/0.23 (3.30), tarsus 0.48/0.13 (3.69).

Distribution. Southwest China (Yunnan), near to Laos borders, under bark.

Figures

Figure 1. Anatemnus reni sp. nov., holotype male: habitus, dorsal view.

Figure 2. Anatemnus reni sp. nov., holotype male: a. carapace, dorsal view; b. left pedipalp, dorsal view; c. left pedipalpal chela, retro-lateral view; d. trochanter of left pedipalp, retro-lateral view; e. genital area, ventral view; f. tarsus of left leg IV, lateral view; g. left leg I, lateral view; h. left leg IV, lateral view. Scale bars: 0.50 mm (a and b) and 0.20 mm (c-h).

Figure 3. Anatemnus reni sp. nov., holotype male: a. carapace, dorsal view (the position of lyrifissures indicated by black bars); b. left chelicera, dorsal view; c. left rallum; d. left galea; e. left pedipalp without chela, dorsal view; f. left pedipalpal chela, retro-lateral view; g. distal part of left pedipalpal chela, retro-lateral view; h. tarsus of left leg IV, lateral view; i. left leg I, lateral view; j. left leg IV, lateral view. Scale bars: 0.25 mm (a, e-j) and 0.10 mm (b-d).