Nipponogarypus seosanensis Jeong & Harms, 2024

Jeong, Kyung-Hoon, Harms, Danilo & Yoo, Jung-Sun, 2024, The pseudoscorpion genus Nipponogarypus (Pseudoscorpiones, Olpiidae) found in seashore habitats in Japan and Korea, Zoosystematics and Evolution 100 (3), pp. 1053-1060 : 1053-1060

Nipponogarypus seosanensis Jeong & Harms sp. nov.

Type material.

Holotype. Female ( NUHGIV 0000001225 ). Korea: Chungcheongnam-province: Ganwoldo 1 – gil, Buseok-myeon, Seosan-si, 36 ° 36 ' 5.56 " N, 128 ° 10 ' 28.54 " E, 03, Jul 2022, KH Jeong leg.

Paratypes: One female and two males ( NUHGIV 0000001228 ), same data as holotype .

Etymology.

This species is named after the type locality, Seosan-si, Chungcheongnam-do, in South Korea.

Habitat.

This species was collected from cracks and fissures of moist rocks in the supralittoral zone, right next to the shoreline (Fig. 2 ).

Diagnosis.

This species is most similar to N. enoshimaensis by having similar L / W ratios in the pedipalpal femur (0.56–0.61 / 0.18 – 0.20 mm in N. seosanensis sp. nov. and 0.52–0.59 / 0.18 mm in N. enoshimaensis ) and pedipalpal patella (0.53–0.59 / 0.21 – 0.23 mm in N. seosanensis sp. nov. and 0.57 / 0.22 mm in N. enoshimaensis ). Both species can easily be distinguished by the number of marginal teeth on the fixed chelal finger (40–43 in N. seosanensis sp. nov., 50 in N. enoshimaensis ). N. seosanensis sp. nov. can further be distinguished from N. okinoerabensis stat. nov. by having a longer pedipalpal femur (0.56–0.61 mm in N. seosanensis sp. nov. and 0.48 mm in N. okinoerabensis stat. nov.) and patella (0.53–0.59 mm in N. seosanensis sp. nov. and 0.45 mm in N. okinoerabensis stat. nov.).

Description.

Female, adult (holotype) (Fig. 3 A, B ).

Color. Blackish-brown, glossy; the ventral surface darker than the end of the body appendages; the coxal region reddish-orange.

Cephalothorax (Fig. 4 A, H ). Carapace 1.18 times longer than the broad; carapace sub-rectangular; four conspicuous eyes; two transverse furrows on the carapace; ten lyrifissures; first furrow situated in medial position on the carapace, second furrow near the posterior margin of the carapace; carapacal chaetotaxy 4–2: 22; setae short and acuminate. Pedipalpal coxa with 10 setae; coxal chaetotaxy 5: 5: 6: 13; one lyrifissure on coxa I – III, two lyrifissures on coxa IV.

Chelicera (Figs 4 C , 5 A ). Cheliceral margin smooth; five setae on the cheliceral hand, one seta on the movable finger; galea long and shortly three-branched at the tip in both sexes; serrula exterior with 19 blades, rallum with three blades. Two lyrifissures on the hand.

Pedipalp (Figs 4 B , 5 B, C ). Trochanter 1.60, femur 2.95, patella 2.46, chela 3.24 times longer than the broad, movable finger 0.99 times longer than the hand. Two pseudotactile setae on the femur. Sensory setae present between et and isb. b and sb on the basal of the finger; st on the middle of the t and b. ib, esb, and eb grouped at the base of the finger; est on the middle of et and esb; it and ib on the dorsal surface of the fixed finger, it on the middle of the finger, and ib on the basal of the finger; ist on the paraxial surface of the chela, between isb and est, but closer to isb; short venom ducts in both fingers, not extending past trichobothrium et.

Marginal teeth small and contiguous; triangular teeth on both fingers; fixed finger with 40, movable finger with 43 marginal teeth.

Legs (Figs 4 D, E , 5 D ). Leg I: trochanter 1.56, femur 2.51, patella 1.80, tibia 3.06, metatarsus 2.08, tarsus 2.33 times longer than the broad; leg IV: trochanter 1.40, femur + patella 3.26, tibia 3.93, metatarsus 2.69, tarsus 2.98 times longer than the broad. Typical for the genus: femur and patella of leg I freely mobile; metatarsus of leg IV shorter than the tarsus; metatarsus of leg I longer than the tarsus; one each pseudotactile seta in the distal position of the tarsus; basal position of the metatarsus; arolium undivided, longer than claws, and simple.

Abdomen (Fig. 5 F ). Pleural membrane striate; all tergites and sternites both undivided; all setae short and acuminate; tergal chaetotaxy 2: 4: 4: 4: 4: 4: 6: 5: 6: 4: 4: 2. Sternal chaetotaxy 10: 4: 6: 8: 6: 4: 6: 6: 4: 4: 2.

Dimensions (in mm). Body length: 1.93 cephalothorax: carapace 0.63 / 0.54, anterior eye 0.07, posterior eye 0.05; chelicera: total 0.22 / 0.12, movable finger 0.16; pedipalp: trochanter 0.31 / 0.19, femur 0.59 / 0.20, patella 0.58 / 0.23, chela 1.08 / 0.33, movable finger 0.53, hand 0.54; leg I: trochanter 0.15 / 0.10, femur 0.23 / 0.09, patella 0.18 / 0.10, tibia 0.21 / 0.07, metatarsus 0.10 / 0.05, tarsus 0.11 / 0.05; leg IV: trochanter 0.16 / 0.11, femur + patella 0.55 / 0.17, tibia 0.38 / 0.10, metatarsus 0.17 / 0.06, tarsus 0.16 / 0.05.

Variation (one female, paratype)

Cephalothorax. Carapace 1.16 times longer than broad.

Pedipalp. Trochanter 1.65, femur 3.13, patella 2.64, chela 3.29 times longer than broad, movable finger 0.88 times longer than hand. Fixed finger with 42, movable finger with 43 marginal teeth.

Legs. Leg I: trochanter 1.28, femur 3.29, tibia 3.34, metatarsus 2.38, tarsus 2.89 times longer than broad; leg IV: trochanter 1.50, femur + patella 3.06, tibia 3.08, metatarsus 2.25, tarsus 2.82 times longer than broad.

Abdomen. Tergal chaetotaxy 2: 4: 4: 4: 4: 6: 6: 6: 4: 2: 2. Sternal chaetotaxy 8: 4: 6: 6: 6: 6: 6: 4: 4: 4: 2.

Dimensions (in mm). Body length 1.90; cephalothorax: carapace 0.58 / 0.50, anterior eye 0.06, posterior eye 0.05; chelicera: total 0.20 / 0.12, movable finger 0.16; pedipalp: trochanter 0.33 / 0.20, femur 0.61 / 0.20, patella 0.59 / 0.22, chela 1.04 / 0.32, movable finger 0.49, hand 0.56; leg I: trochanter 0.14 / 0.11, femur 0.24 / 0.10, patella 0.19 / 0.10, tibia 0.25 / 0.08, metatarsus 0.12 / 0.05, tarsus 0.13 / 0.05; leg IV: trochanter 0.19 / 0.13, femur + patella 0.60 / 0.20, tibia 0.34 / 0.11, metatarsus 0.15 / 0.07, tarsus 0.18 / 0.06.

Variation (two males, paratype)

Cephalothorax. Carapace 1.20–1.23 times longer than broad.

Pedipalp. Trochanter 1.34–1.59, femur 3.07–3.13, patella 2.6, chela 3.05–3.21 times longer than the broad, movable finger 0.81–0.89 times longer than the hand. Fixed finger with 40–41, movable finger with 41–43 marginal teeth.

Legs. Leg I: trochanter 1.20–1.67, femur 2.08–2.45, patella 1.66–1.70, tibia 2.67–3.22, metatarsus 2.62–2.67, tarsus 2.86–3 times longer than broad; leg IV: trochanter 1.25–1.39, femur + patella 2.67–2.74, tibia 3.54–3.63, metatarsus 2.77–3.16, tarsus 2.5–2.7 times longer than broad.

Abdomen. Tergal chaetotaxy 2: 4: 4: 4: 4: 6: 6: 6: 6: 4: 4: 2. Sternal chaetotaxy 11: 6: 4: 6: 6: 6: 6: 5: 4: 4: 2.

Male genital sternites (Fig. 4 G ). Nine lyrifissures on sternites II and III; 11 setae on the genital opening area; six setae on the sternite III.

Dimensions (in mm). Body length: 1.83–1.84; cephalothorax: carapace 0.61 / 0.50–0.51, anterior eye 0.06, posterior eye: 0.04–0.05; chelicera: total 0.20 / 0.10–0.11 movable finger 0.14; pedipalp: trochanter 0.25–0.32 / 0.19 – 0.20, femur 0.56–0.60 / 0.18 – 0.19, patella 0.53–0.57 / 0.21 – 0.22, chela 0.91–0.92 / 0.21 – 0.29, movable finger 0.41–0.43, z 0.49–0.50; leg I: trochanter 0.12 / 0.07–0.10, femur 0.18–0.24 / 0.09 – 0.10, patella 0.15–0.16 / 0.09 – 0.10, tibia 0.17–0.23 / 0.06 – 0.07, metatarsus 0.12–0.13 / 0.05, tarsus 0.13 / 0.04; leg IV: trochanter 0.17–0.18 / 0.13, femur + patella 0.51 / 0.19, tibia 0.37 / 0.10, metatarsus 0.15–0.16 / 0.05, tarsus 0.12–0.16 / 0.05 – 0.06.

Figures

Figure 2. Habitat of Nipponogarypus seosanensis sp. nov. in the littoral zone of Seosan-si, Chungcheongnam-do, South Korea.

Figure 3. Habitus of Nipponogarypus seosanensis sp. nov. A. Female holotype, dorsal view; B. Female holotype, ventral view; C. Male paratype, dorsal view; D. Male paratype, ventral view.

Figure 4. Appendages of Nipponogarypus seosanensis sp. nov., holotype female. A. Carapace; B. Chelicera in dorsal view; C. Left pedipalp in dorsal view; D. Right chela from lateral view; E. Coxa; F. Right leg I; G. Right leg II; H. Female genital sternites; I. Right leg IV; J. Male genital sternites. Scale bars: 0.5 mm (A, C – G, I); 0.2 mm (H, J); 0.1 mm (B).

Figure 5. Appendages of Nipponogarypus seosanensis sp. nov., paratype female. A. Galea; B. Left chela, lateral view; C. Left chelal fingers, lateral view, sensory setae in the white box; D. Right leg I; E. Claws and arolium of right leg I; F. Pleural membrane. Scale bars: 0.02 mm (A); 0.3 mm (B); 0.1 mm (C, D, F); 0.05 mm (E).