Pholcus chilgapsanensis Lee & Lee, 2021

Lee, Jun-Gi, Lee, Jun-Ho, Choi, Doo-Young, Park, Sun-Jae, Kim, A-Young & Kim, Sam-Kyu, 2021, Five new species of the genus Pholcus Walckenaer (Araneae: Pholcidae) from South Korea, Zootaxa 5052 (1), pp. 61-77 : 72-74

publication ID	https://doi.org/ 10.11646/zootaxa.5052.1.3
publication LSID	lsid:zoobank.org:pub:64AA2A9F-9C9B-4F54-A199-644B4A0E2C3F
DOI	https://doi.org/10.5281/zenodo.5565985
persistent identifier	https://treatment.plazi.org/id/316F879B-FFFA-FFFA-C1BC-7514FC65F82D
treatment provided by	Plazi
scientific name	Pholcus chilgapsanensis Lee & Lee
status	sp. nov.

Treatment

Pholcus chilgapsanensis Lee & Lee View in CoL , sp. nov.

Figs. 1I–J View FIGURE 1 , 2I–J View FIGURE 2 , 11 View FIGURE 11 , 12 View FIGURE 12 , 15A–R View FIGURE 15 , 16 View FIGURE 16

Type material. Holotype: ♂, SOUTH KOREA : Chungcheongnam-do: Cheongyang-gun, Daechi-myeon, Janggoksa temple in Mt. Chilgapsan (36˚25’00”N, 126˚51’29”E), 12 Sep. 2012, DY Choi leg. ( NIBR) . Paratypes: 2♂ 5♀, same data as for holotype ( KISE) ; 2♀, same data as for holotype ( KNU) ; Chungcheongbuk-do: 4♂ 5♀, Eumseong-gun, Saenggeuk-myeon, Sureuisan Natural Recreation Forest (37˚02'28"N, 127˚39'15"E), 03 Nov. 2012, DY Choi leg. ( KISE) ; 1♂ 1♀, ditto ( KNU) ; 19♂ 17♀, Jincheon-gun, Chopyeong-myeon, near Chopyeong 1 tunnel (36˚48'07"N, 127˚31'41"E), 20 May 2016, DY Choi leg. ( KISE) ; 1♂ 1♀, ditto ( KNU) .

Etymology. The specific epithet is derived from the holotype locality, Mt. Chilgapsan.

Diagnosis. This species can be distinguished from the other congeners by the combination of following characteristics: Male—procursus tip with serrated, distally pointed dorsal process and distally hooked membranous prolateral process; uncus lingulate, inner margin slightly convex. Female—epigynal anterior plate strongly protruded, with round posterior margin; epigynal posterior plate reduced and obscured by epigynal anterior cuticle; epigynal knob well-developed; anterior arch of internal genitalia with anterolateral extension laterally.

Description. Male (holotype). Habitus as in Fig. 1I View FIGURE 1 . Total length 5.4. Prosoma 1.6 long, 1.5 wide. Diameter of AME 130 µm, ALE 170 µm, PME 150 µm, PLE 160 µm. AME–AME 80 µm, PME–PME 210 µm, PME–ALE 40 µm. Chelicera ( Fig. 2I–J View FIGURE 2 ) with thumb-like proximo-lateral apophysis, conical frontal apophysis and triangular distal apophysis curved dorsally, longer than proximo-lateral apophysis; Opisthosoma 3.6 long, 1.5 wide. Leg Ⅰ 47.3 (11.9 + 0.7 + 12.0 + 20.6 + 2.1), leg II 31.6 (8.8 + 0.6 + 8.0 + 12.8 + 1.4), leg III 20.7 (6.1 + 0.5 + 5.1 + 7.9 + 1.1), leg IV 27.3 (7.9 + 0.6 + 7.0 + 10.9 + 0.9). Ratio of leg Ⅰ (16.1: 1.0: 16.2: 27.8: 2.9), leg II (13.7: 1.0: 12.5: 20.1: 2.3), leg III (11.5: 1.0: 9.6: 14.8: 2.0), leg IV (13.6: 1.0: 12.0: 18.7: 1.6). Leg formula 1243. Tibia Ⅰ L/d 75. Retrolateral trichobothrium on tibia Ⅰ at 6% proximally. Tarsus Ⅰ with 27 pseudosegments. For the other somatic features see description of the species-group above. Palp ( Fig. 11 View FIGURE 11 ). Trochanter apophysis ( Fig. 11A–B View FIGURE 11 ) longer than femur, slender, distinctly elongated and slightly curved retrolaterally, with tubercle proximo-retrolaterally; femur ventrally swollen; tibia with prolatero-ventral tubercle; procursus ( Fig. 11B View FIGURE 11 ) brown, slightly sinuated dorsally, with moderate ventral knee; dorso-subdistal portion of procursus slightly swollen, with one short hair and two spines ( Fig. 11C View FIGURE 11 ); procursus tip ( Fig. 11C–E View FIGURE 11 ) with two ridges retrolaterally, pointed projection prolatero-distally (arrowed 3 in Fig. 11D View FIGURE 11 ), serrated, distally pointed dorsal process directed prolaterally (arrowed 1 in Fig. 11D View FIGURE 11 ), distally hooked membranous prolateral process (arrowed 2 in Fig. 11D View FIGURE 11 ), and round ventral process (arrowed in Fig. 11E View FIGURE 11 ); genital bulb round, pale yellow; uncus ( Fig. 11F View FIGURE 11 ) dark brown, lingulate, outer proximal margin extended roundly without scales, outer distal margin curved and inner distal margin slightly convex, with many tiny scales; pseudoappendix ( Fig. 11G View FIGURE 11 ) tiny and round; embolus ( Fig. 11G View FIGURE 11 ) pale yellow, slender and distally fringed, weakly sclerotized, about 1.5 times as long as uncus.

Female (one of paratypes from the same locality as holotype). Habitus as in Fig. 1J View FIGURE 1 . Total length 5.2. Prosoma 1.5 long, 1.5 wide. Diameter of AME 120 µm, ALE 190 µm, PME 160 µm, PLE 170 µm. AME–AME 50 µm, PME– PME 170 µm, PME–ALE 60 µm. Opisthosoma 3.4 long, 1.7 wide. Leg Ⅰ 36.0 (9.3 + 0.6 + 9.3 + 14.6 + 2.2), leg II 24.5 (6.9 + 0.7 + 6.3 + 9.2 + 1.4), leg III 17.7 (5.1 + 0.6 + 4.5 + 6.4 + 1.1), leg IV 24.7 (7.2 + 0.7 + 6.3 + 9.2 + 1.3). Ratio of leg Ⅰ (15.2: 1.0: 15.2: 23.9: 3.5), leg II (9.6: 1.0: 8.7: 12.7: 2.0), leg III (8.3: 1.0: 7.3: 10.6: 1.8), leg IV (10.6: 1.0: 9.3: 13.6: 2.0). Leg formula 1423. Tibia Ⅰ L/d 62. For the other somatic features see description of the species-group above. Epigyne ( Fig. 12A–C View FIGURE 12 ). Anterior plate strongly protruded, half as high as epigyne length, with round posterior margin; anterior cuticle sclerotized; posterior plate reduced and obscured by anterior plate; epigynal knob thick and distally round. Internal genitalia ( Fig. 12D View FIGURE 12 ). Anterior arch with median portion slightly curved anteriorly, anterolateral portion extended laterally; genital valve inverted U-shaped; posterolateral portion strongly concave; pore plates ovoid, close together anteriorly but wide apart posteriorly.

Variation. Males.Prosoma length:1.3–1.9(mean 1.7),tibiaⅠ:10.3–14.9(mean 12.4)(n=10).An intrapopulational variation was observed on the number of serrations on the dorsal process of the procursus tip ( Fig. 15A, D, G, J, M, P View FIGURE 15 ), ranging from prominent to without discernible serrations, as in specimens from Chopyeong 1 tunnel, Jincheon ( Fig. 15M, P View FIGURE 15 ). The length of the dorso-subdistal spines of procursus is also variable.

Females. Prosoma length: 1.3–1.7 (mean 1.5), tibia Ⅰ: 7.7–9.4 (mean 8.4) (n=10). An intrapopulational variation was observed on the shapes of the pore plates of internal genitalia, ranging from ovoid to narrowly oblong ( Fig. 15C, F, I, L, O, R View FIGURE 15 ); specimens from holotype locality (Mt. Chilgapsan, Cheongyang) have ovoid pore plates ( Fig. 15C, F View FIGURE 15 ), but specimens from other localities (Mt. Sureuisan, Eumseong and near Chopyeong 1 tunnel, Jincheon) have narrowly oblong or oblong pore plates ( Fig. 15I, L, O, R View FIGURE 15 ). The epigynal shapes were slightly variable but largely consistent ( Fig. 15B, E, H, K, N, Q View FIGURE 15 ).

Habitat information. This species was found on rock walls and road drains in mountainous regions.

Distribution. Korea (Cheongyang, Eumseong, Jincheon) ( Fig. 16 View FIGURE 16 )