Description

Description. Adult male (Figs 13 A, 14 A-D, F-I, 15 A, B, D-H, J). Color: carapace dark brown, slightly paler in tergites and sternites; pedipalps reddish brown, but paler in trochanter; legs pale yellow. Carapace (Figs 14 A, 15 A): 1.20 x longer than broad; surface smooth, but with a medial furrow; with two distinct eyespots situated near anterior margin of carapace; anterior margin with five setae, posterior margin with eight setae, each seta acicular and very slightly curved. Chelicera (Fig. 15 B, D): much smaller than carapace length; surface smooth; four setae (sbs absent; es shorter than others) and two lyrifissures (exterior condylar lyrifissure and exterior lyrifissure) present on hand; movable finger with one galeal seta (shorter than others); bs and es dentate apically, is and ls long and acute. Fixed finger with seven unequally sized teeth, movable finger with two large teeth; galea present, shorter with two small branchlets and two dentations (Fig. 15 B). Serrula interior connected to fixed finger for entire length, proximally modified to form velum, serrula exterior with 25 lamellae, the basal one longest; lamina exterior present. Rallum composed of four blades, the basal two blades shorter than others, the distal two dentated anteriorly, remainder smooth (Fig. 15 D). Pedipalp (Figs 14 B-D, 15 G, J): stout, trochanter 1.77 x, femur 2.59 x, patella 1.95 x, chela with pedicel (without pedicel) 2.72 x (2.51 x), hand with pedicel (without pedicel) 1.66 x (1.45 x) longer than broad; movable chelal finger 0.64 x (0.74 x) longer than hand with pedicel (without pedicel) and 0.39 x (0.42 x) longer than chela with pedicel (without pedicel). Setae generally long and acuminate. All segments (except chelal fingers) with fine granulations; trochanter with an inconspicuous ventral tubercle and a well-developed conical dorsal tubercle. Fixed chelal finger with eight trichobothria, movable chelal finger with four trichobothria: eb and esb situated at base of fixed finger on retrolateral face, esb slightly distal to eb; ib and isb situated at base of fixed finger on prolateral face, isb slightly distal to ib; est in the middle of fixed finger; et near sub-distal of fixed finger; est midway between et and esb; it slightly distal to est and proximal to et; ist situated proximal to est and distal to isb; it closer to ist than to fingertip; distance between est and esb farther to that of ist and isb; distance between it and fingertip nearly equal to distance between ist and isb; b and sb situated at base of movable finger on retrolateral face; t in the middle of movable finger and at same level as est; sb closer to b than to st; st closer to sb than to t (Fig. 15 G). Venom apparatus only present in fixed chelal finger, venom ducts curved and short, terminating in inflated nodus ramosus between et and est. Both chelal fingers with a row of acute teeth, spaced contiguously along the margin, slightly rounded proximally: fixed chelal finger with 24 teeth; movable chelal finger with 28 teeth (nearly as large as teeth on fixed chelal finger); without accessory teeth (Fig. 15 G). Femur without long tactile setae. Movable chelal finger slightly curved in lateral view (Figs 14 B, 15 G). Opisthosoma: typical, all setae long and acuminate; pleural membrane longitudinally striate, without setae. Tergites incompletely divided, tergal chaetotaxy I-XI: 10: 8: 5: 11: 13: 14: 15: 15: 17: 17 (13 + 4 T): 12 (10 + 2 T). Sternites X and XI undivided and other sternites divided, sternal chaetotaxy IV-XI: 5 - 5: 8 - 8: 8 - 8: 7 - 8: 7 - 7: 7 - 7: 18: 16; sternites X and XI each with two pairs of long tactile setae. Anus (tergite XII and sternite XII) without raised rim. Anterior genital operculum with five or seven setae on each side, posterior margin with eight setae. Legs (Figs 14 G-I, 15 E, F): generally typical, fairly smooth, slightly stout; junction between femora and patellae I and II oblique. Femoropatella of leg IV 2.80 x longer than deep; tibia 3.86 x longer than deep; with basal tactile setae on tarsal segment: tarsus 3.55 x longer than deep (TS = 0.10); subterminal tarsal setae arcuate and acute. Arolium slightly shorter than claws, not divided; claws smooth. Adult females (Figs 13 B, 14 E, 15 I): mostly same as the male, but larger and paler. Chelicera: galea distinct relatively short, with five distinct larger branchlets (Fig. 15 C); serrula exterior with 25 lamellae, the basal one longest. Pedipalp: stout, trochanter 1.67 - 1.78 x, femur 2.42 - 2.52 x, patella 2.00 - 2.25 x, chela (with pedicel) 2.57 - 2.67 x, chela (without pedicel) 2.37 - 2.42 x, hand (with pedicel) 1.61 - 1.69 x, hand (without pedicel) 1.41 - 1.44 x longer than broad, movable chelal finger 0.58 - 0.60 x (0.68 x) longer than hand with pedicel (without pedicel) and 0.37 x (0.40 - 0.41 x) longer than chela with pedicel (without pedicel); palpal coxa with four apical setae, sub-terminal seta larger; all segments (except chelal fingers) with fine granulations. Opisthosoma: tergites incompletely divided, tergal chaetotaxy I-XI: 8: 9: 10: 13: 16: 14: 15: 17: 15: 16 (12 + 4 T): 11 (9 + 2 T). Sternites divided, sternal chaetotaxy IV-XI: 7 - 8: 8 - 8: 8 - 8: 8 - 9: 8 - 8: 9 - 9: 16 (12 + 4 T): 14 (12 + 2 T). Genitalia simple, spermathecae provided with separated median cribriform plates; anterior genital operculum with five setae on each side, posterior margin with four or five setae on each side. Legs: femoropatella of leg IV 2.81 - 2.93 x longer than deep; tibia 3.28 - 3.41 x longer than deep; with basal tactile setae on tarsal segment: tarsus 3.75 - 4.00 x longer than deep (TS = 0.09 - 0.11). Dimensions (length / breadth or, in the case of the legs, length / depth in mm). Male (females in parentheses): body length 2.73 (4.25 - 4.40). Carapace 0.85 / 0.71 (0.93 - 1.01 / 0.80 - 0.84). Pedipalp: trochanter 0.46 / 0.26 (0.45 - 0.48 / 0.27), femur 0.75 / 0.29 (0.75 - 0.78 / 0.31), patella 0.72 / 0.37 (0.72 - 0.81 / 0.36), chela (with pedicel) 1.28 / 0.47 (1.39 / 0.52 - 0.54), chela (without pedicel) 1.18 (1.26 - 1.28), hand (with pedicel) 0.78 (0.87 - 0.88), hand (without pedicel) 0.68 (0.75 - 0.76), movable finger length 0.50 (0.51 - 0.52). Leg I: trochanter 0.18 / 0.15 (0.17 - 0.20 / 0.14 - 0.17), femur 0.25 / 0.19 (0.24 - 0.26 / 0.20 - 0.21), patella 0.37 / 0.17 (0.41 / 0.18), tibia 0.39 / 0.12 (0.42 - 0.44 / 0.12), tarsus 0.38 / 0.09 (0.40 - 0.42 / 0.08 - 0.09). Leg IV: trochanter 0.29 / 0.16 (0.32 - 0.33 / 0.21), femoropatella 0.70 / 0.25 (0.76 - 0.79 / 0.27), tibia 0.54 / 0.15 (0.58 - 0.59 / 0.17 - 0.18), tarsus 0.39 / 0.11 (0.44 - 0.45 / 0.11 - 0.12).

Common Names

Taxonomic Hierarchy

Kingdom: Animalia

Phylum: Arthropoda

Class: Arachnida

Order: Pseudoscorpiones

Family: Atemnidae

Genus: Catatemnus

Species: Catatemnus tengchongensis Hou, Zhao & Zhang, 2023