Falcileptoneta jindoensis, Oh & Lee, 2023

Oh, Jong-Hwa & Lee, Seunghwan, 2023, Six new epigean species of the genus Falcileptoneta Komatsu, 1970 (Araneae Leptonetidae) from South Korea, Zootaxa 5339 (1), pp. 40-58 : 51

Falcileptoneta jindoensis sp. nov.

Figures 1 (E–F), 8, 13 (4)

Type material. Holotype: ♁, Sancheon-ri , Uisin-myeon, Jindo-gun, Jeollanam-do, Korea (34°27ʹ57.8ʺN, 126°18ʹ19.2ʺE), 08.ix.2021, J.H Oh leg. ( NIBR).

Other material examined. 1 juv., same data as holotype ( SNU)

Etymology. The specific name is derived from the type locality, Jindo island.

Diagnosis. Falcileptoneta jindoensis sp. nov. can be separated from all Falcileptoneta species except F. innuta sp. nov. by the following combination: abdomen with row of white chevron patterns; palpal tibia without small projection, RTA semi-transparent, bulb with sickle-like embolus tip. Separated from F. innuta sp. nov. by a faint boundary of chevron patterns in abdomen (clear boundary in F. innuta sp. nov.), blade-like prolateral sclerite (needle-like in F. jindoensis sp. nov.).

Description. Male (Holotype). Habitus as in Fig. 8A, B . Body length 1.90. prosoma dark brown but gradually lighter towards central region, with three setae in thoracic area and two both side of PME, 0.88 long 0.80 wide, 1.10 times longer than wide; eyes six well developed. Sternum shield shape slightly widely protruded posteriorly, 0.57 long, 0.55 wide. Endite L-shaped, longer than wide. Legs thin and elongated, femur I 2.52 times longer than prosoma length, leg formula I-IV-II-III, measurements: I 8.27 (2.22, 0.30, 2.66, 2.03, 1.06); II 6.01 (1.64, 0.30, 1.79, 1.35, 0.93); III 4.85 (1.35, 0.28, 1.45, 1.15, 0.62); IV 6.66 (1.83, 0.29, 2.14, 1.63, 0.77); palp 1.64 (0.65, 0.26, 0.35, 0.38). Palp ( Fig. 8C–F ): femur without row of strong spine; patella slightly elongated; tibia with two trichobothrium; retrolateral tibial apophysis finger-like, rather transparent with bifurcation and excessively bent inwards, apically tapering; tarsus unbranched, apically blunt with dense of long setae; palpal bulb oval, 1.67 times longer than wide, with developed sickle-like embolus tip, and three types of sclerite: median sclerite shoehorn-like, prolateral sclerite dark and blade-like, retrolateral sclerite membranous. Opisthosoma dark brown and oval with seven white chevron patterns decreasing in size and gradually clear in border posteriorly, 1.02 long, 0.67 wide.

Female. Unknown (only an immature female was found).

Habitat information. This species was found in litter in mixed forests.

Distribution. South Korea (Jindo Is., Jindo-gun, Jeollanam-do) ( Fig. 13 ).

Comments. DNA barcodes of this species have been reported in Oh et al. (2022), synonym to Falcileptoneta sp9 (GenBank Acc. No.: ON042094, ON042095).

Figures

FIGURE 1. Live habitus of collected specimens (A, C, E: male, B, D: female, F: female, immature). A–B, Falcileptoneta decemspina sp. nov.; C–D, F. innuta sp. nov.; E–F, F. jindoensis sp. nov..

FIGURE 8. Falcileptoneta jindoensis sp. nov., holotype male. A–B, habitus (A: dorsal view, B: ventral view); C–F, left palp (C: prolateral view, D: retrolateral view, E: dorsal view, F: ventral view). Abbreviations: Em=embolus, MS=median sclerite, PS=prolateral sclerite, RTA=retrolateral tibial apophysis. Scale bars: A–B=0.5 mm, C–F=0.1 mm.

FIGURE 13. Sampling sites of collected specimens of six new Falcileptoneta species from Korea. 1 (Pink), F. alboclavata sp. nov.; 2 (Orange), F. decemspina sp. nov.; 3, (Brown) F. innuta sp. nov.; 4 (Yellow), F. jindoensis sp. nov.; 5 (Green), F. stilla sp. nov.; 6 (Blue), F. triformis sp. nov..