Description

Description. Adult male (Figs 1 A, 2 A-E, G-I, 3 A-H, J-L). Color: anterior half of carapace yellowish brown, paler in posterior half; pedipalps reddish brown, paler in female; tergites brown, paler in legs; remainder yellow. Carapace (Figs 2 A, 3 A): anterior half slightly darker than posterior half; surface smooth, but with a faint medial furrow; with two faint eyespots situated near anterior margin of carapace; anterior margin with six setae, posterior margin with seven setae, 47 in total, each seta acicular and very slightly curved; with a pair of lyrifissures on anterior margin and posterior margin, respectively. Chelicera (Fig. 3 B, C, E): much smaller than carapace length; surface smooth; four setae (sbs absent; bs shorter than others) and two lyrifissures (exterior condylar lyrifissure and exterior lyrifissure) present on hand; movable finger with one galeal seta; bs and es dentate apically, is and ls long and acute. Fixed finger with six large retrorse teeth and three small apical teeth, movable finger with a long broadly rounded subapical lobe; galea present, slender, apically with five branchlets (Fig. 3 C). Serrula interior connected to fixed finger for entire length, proximally modified to form velum, serrula exterior with 26 lamellae, the basal one longest; lamina exterior present. Rallum composed of four blades, the basal two blades shorter than others, the distal one dentated anteriorly, remainder smooth (Fig. 3 E). Pedipalp (Figs 2 B-D, 3 F, H): stout, trochanter 1.85 x, femur 2.48 x, patella 2.14 x, chela with pedicel (without pedicel) 3.05 x (2.81 x), hand with pedicel (without pedicel) 1.79 x (1.55 x) longer than broad; movable chelal finger 0.71 x (0.82 x) longer than hand with pedicel (without pedicel). Setae generally long and acuminate. Retrolateral surface of trochanter, the prolateral surface of femur, patella, and hand granular; trochanter with a rounded 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 closer to et than to 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 shorter 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 t than to sb (Fig. 3 H). Venom apparatus only present in fixed chelal finger, venom ducts curved and short, terminating in inflated nodus ramosus between et and est and closer to est. Both chelal fingers with a row of acute teeth, spaced contiguously along the margin, slightly rounded proximally: fixed chelal finger with 28 teeth; movable chelal finger with 35 teeth (nearly as large as teeth on fixed chelal finger); without accessory teeth (Fig. 3 H). Sense spots absent; femur without long tactile setae. Movable chelal finger slightly curved in lateral view (Figs 2 C, 3 H). Opisthosoma: generally typical, all setae long and acuminate, pleural membrane longitudinally striate, without setae. Tergites I and XI undivided and other tergites incompletely divided, tergal chaetotaxy I-XI: 9: 9: 4 - 4: 7 - 7: 9 - 8: 7 - 8: 7 - 8: 8 - 7: 8 - 6: 7 - 7 + (2 T): 13 + (4 T), arranged in two rows on tergites IV-XI. Sternites XI undivided and other sternites divided, sternal chaetotaxy IV-XI: 6 - 6: 8 - 7: 8 - 8: 8 - 8: 6 - 7: 7 - 7: 7 - 7 (4 T): 13 + (4 T). Anus (tergite XII and sternite XII) without raised rim. Anterior genital operculum with seven setae on each side, posterior margin with four setae on each side and with one or two lyrifissures. Male genitalia (Figs 2 E, 3 J, L): the distal part (l) of lateral apodemes with a distinctive inner ridge curved into semicircle; the hooked branch (br) bowed distally and terminated in a plate-like tip; the proximal part with a distinct dark sclerotized bar (c), shorter and incurved; the longitudinal fold of medial diverticula (d) with a projection midway along its length, forming a lobe bulge; the ejaculatory canal atrium (e) not well-developed, curved distally; the lateral rods (f) long and diverging proximally; the tip of dorsal apodeme (g) completely joined; the ventral diverticulum (h) bilobed; genital atrium without genital setae. Legs (Figs 2 G-I, 3 G, K): typical, fairly smooth, slightly stout; junction between femora and patellae I and II oblique. Femoropatella of leg IV 3.13 x longer than deep; tibia 3.93 x longer than deep; with basal tactile setae on tarsal segment: tarsus 4.50 x longer than deep (TS = 0.09 - 0.11); subterminal tarsal setae arcuate and acute. Arolium slightly shorter than claws, not divided; claws smooth. Adult Female (Figs 1 B, 2 F, 3 D, I): mostly same as the male, but a little larger in body size; anterior half of carapace yellowish brown, paler in posterior half; pedipalps reddish brown; tergites yellowish brown, paler in legs; remainder yellow. Carapace: anterior margin with two setae, posterior margin with eight setae, 46 in total. Chelicera: hand with four setae, bs and es dentate apically, is and ls long and acute; fixed finger with six large retrorse teeth and three small apical teeth, movable finger with two long broadly rounded subapical lobes; galea with six branchlets (Fig. 3 D); serrula exterior with 21 lamellae; rallum with four blades. Pedipalp: stout, the retrolateral surface of trochanter, the prolateral surface of femur, patella and base of chelal fingers granular; trochanter with two distinct conical dorsal tubercles; trochanter 1.88 x, femur 2.52 x, patella 2.20 x, chela (with pedicel) 2.93 x, chela (without pedicel) 2.74 x, hand (without pedicel) 1.58 x longer than broad, movable chelal finger 0.67 x (0.75 x) longer than hand with pedicel (without pedicel). Opisthosoma: tergites I, II, and XI undivided, tergites III and IV incompletely divided and other tergites completely divided; tergal chaetotaxy (I-XI): 8: 11: 6 - 6: 8 - 7: 7 - 8: 9 - 8: 9 - 9: 8 - 8: 8 - 8: 14 + (2 T): 10 + (4 T); sternites XI undivided and other sternites divided, sternal chaetotaxy (IV-XI): 6 - 6: 8 - 8: 8 - 9: 7 - 5: 8 - 6: 8 - 8: 8 - 9 (4 T): 9 + (4 T); genital structure (Figs 2 F, 3 I) simple, spermathecae provided with separated median cribriform plates. Dimensions (length / breadth or, in the case of the legs, length / depth in mm). Male (female in parentheses): body length 3.19 (3.21). Carapace 0.87 / 0.66 (0.87 / 0.69). Pedipalp: trochanter 0.48 / 0.26 (0.49 / 0.26), femur 0.72 / 0.29 (0.78 / 0.31), patella 0.77 / 0.36 (0.77 / 0.35), chela (with pedicel) 1.28 / 0.42 (1.35 / 0.46), chela (without pedicel) 1.18 (1.26), hand (with pedicel) 0.75 (0.82), hand (without pedicel) 0.65 (0.73), movable finger length 0.53 (0.55). Leg I: trochanter 0.17 / 0.14 (0.16 / 0.15), femur 0.28 / 0.18 (0.27 / 0.19), patella 0.40 / 0.16 (0.40 / 0.16), tibia 0.40 / 0.12 (0.42 / 0.12), tarsus 0.38 / 0.08 (0.41 / 0.09). Leg IV: trochanter 0.30 / 0.16 (0.30 / 0.17), femoropatella 0.75 / 0.24 (0.79 / 0.25), tibia 0.59 / 0.15 (0.62 / 0.16), tarsus 0.45 / 0.10 (0.48 / 0.11).

Common Names

Taxonomic Hierarchy

Kingdom: Animalia

Phylum: Arthropoda

Class: Arachnida

Order: Pseudoscorpiones

Family: Atemnidae

Genus: Catatemnus

Species: Catatemnus huae Hou, Zhao & Zhang, 2023