Falcileptoneta innuta, 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 : 46-51

Falcileptoneta innuta sp. nov.

Figures 1C–D , 6–7 , 13 (3)

Type material. Holotype: ♁, Wando Arboretum : 156, Chopyeong 1-gil, Gunoe-myeon, Wando-gun, Korea (34°21ʹ36.6ʺN, 126°39ʹ41.8ʺE), 09.ix.2021, J.H. Oh leg. ( SNU).

Paratypes: 4 ♁, 4 ♀, same data as holotype ( SNU) ; 1 ♀, 18–19.viii.2020, other data same as holotype ( SNU) .

Other material examined. 9 juv., same data as holotype ( SNU) ; 3 juv., 18–19.viii.2020, other data same as holotype ( SNU) .

Etymology. The specific name is derived from Latin verb innuta meaning “beckon to” referring to the shape of retrolateral tibial apophysis.

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

Description. Male (Holotype). Habitus as in Fig. 6A, B . Body length 1.84. Prosoma dark brown but gradually lighter towards central region, with three setae scattered in thoracic area, one in front of AER, and two between AME and PME, 0.81 long, 0.72 wide, 1.13 times longer than wide; eyes six well developed. Sternum shield shape slightly protruded wide posteriorly, 0.55 long, 0.52 wide. Endite L-shaped, longer than wide. Legs thin and elongated, femur I 2.00 times longer than prosoma length, leg formula I-IV-II-III, measurements: I 6.12 (1.60, 0.28, 1.95, 1.46, 0.83); II 4.81 (1.32, 0.27, 1.41, 1.06, 0.75); III 4.04 (1.09, 0.25, 1.14, 0.95, 0.61); IV 5.61 (1.49, 0.28, 1.72, 1.34, 0.78); palp 1.37 (0.53, 0.21, 0.30, 0.33). Palp ( Fig. 6C–F ): femur without row of strong spine; patella slightly elongated; tibia with three trichobothrium; retrolateral tibial apophysis semi-transparent, with a sharp and curved bending process apically; tarsus unbranched, apically blunt with dense of long setae; palpal bulb oval, 1.69 times longer than wide, with developed sickle-like embolus tip, and three types of sclerite: median sclerite shoehorn-like, prolateral sclerite dark and needle shape, retrolateral sclerite membranous. Opisthosoma dark brown and oval with eight to nine white chevron patterns decreasing in width posteriorly, 1.03 long, 0.70 wide.

Female. Habitus as in Fig. 7A, B . Similar to male in general appearance and coloration but slightly larger than male in body size. Total length 2.01. Prosoma dark brown, coloration and arrangement of prosomal setae similar to male, 0.86 long 0.76 wide, 1.13 times longer than wide; eyes six. Sternum shield shape, widely protruded posteriorly, 0.57 long, 0.93 wide. Legs thin and elongated, femur I 1.78 times longer than prosoma length, leg formula I-IV-II-III, measurements: I 6.00 (1.53, 0.32, 1.90, 1.35, 0.90); II 4.53 (1.30, 0.28, 1.38, 1.02, 0.55); III 4.08 (1.10, 0.29, 1.13, 0.94, 0.62); IV 5.50 (1.46, 0.29, 1.69, 1.29, 0.77); Palp 1.62 (0.51, 0.19, 0.40, 0.52). Opisthosoma brown with white chaperons, arrangement similar to male, 1.15 long, 0.93 wide. Internal genitalia ( Fig. 7C ): atrium rectangular; posterior margin with short and fine setae; spermathecae stalk coiled once; spermathecae oval heading downwards.

Habitat information. This species was found in litter and between rock piles in mixed forests.

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

Comments. DNA barcodes of this species have been reported in Oh et al. (2022), synonym to Falcileptoneta sp8 (GenBank Acc. No.: ON041850, ON041851, ON041852, ON041872, ON042103, ON042104, ON042105, ON042106, ON042107, ON042108, ON042109, ON042110, ON042111).

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 6. Falcileptoneta innuta 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 7. Falcileptoneta innuta sp. nov., paratype female.A–B, habitus (A: dorsal view, B: ventral view); C, internal genitalia, dorsal view. Abbreviations: At=atrium, SH=spermathecae, SS=spermathecae stalk. Scale bars: A–B=0.5 mm, C=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..