Micaria longimana Suzuki, 2022

Suzuki, Yuya & Tatsuta, Haruki, 2022, Two New Species of Ground Spiders (Araneae: Gnaphosidae) from Okinawa Islands, Japan, Species Diversity 27 (2), pp. 319-328 : 323-327

Micaria longimana Suzuki , sp. nov.

[New Japanese name: Tenaga-tsuyagumo] ( Figs 4–6 )

Type material. Holotype: male, NSMT-Ar 22042 , Moriguchi-koen Park , Oroku, Naha City, Okinawa, Japan (26.197408°N, 127.673565°E), 9 March 2021, Y. Suzuki leg. Paratypes: 1 male 2 females, NSMT-Ar 22043 , same data as the holotype; 3 males 2 females, NSMT-Ar 22044 , same locality as the holotype, 11 March 2020, Y. Suzuki leg.; 1 male 1 female, NSMT-Ar 22045 , same locality as the holotype, 30 March 2020, R. Shida leg. ; 1 female 1juv., NSMT-Ar 22046, Urasoe-daikouen Park , Iso, Urasoe City, Okinawa, Japan (26.246425°N, 127.731277°E), 8 March 2021, Y. Suzuki leg .

Specimens used for comparison. Micaria dives : 1 male 1 female, NSMT-Ar 22047, Kaname, Tsukuba City, Ibaraki, Japan, 27 July 2019, Y. Suzuki leg; 1 female, Tennodai, Tsukuba City , Ibaraki, Japan, 17 August 2019, Y. Suzuki leg.; 2 males 2 females, Kurihara, Tsukuba City , Ibaraki, Japan, 25 April 2020, Y. Suzuki leg.; 1 female, Mitsugi, Musashimurayama City , Tokyo, 27 April 2014, T. Ichikawa leg.; 1 male, Mt. Tenran-zan, Hanno City, Saitama, Japan, 21 July 2014, T. Ichikawa leg.; 1 male, Kofuchu Town, Kofu City , Yamanashi, 4 April 2014, T. Ichikawa leg.; 1 female, Ikaruga Town Ikoma Distirct , Nara, 17 July 2014, T. Ichikawa leg.; 1 female, Ōzukanishi, Asaminami-ku, Hiroshima City , Hiroshima, 30 May 2020, M. Honda leg.; 1 male, Kitatakami Town, Kochi City , Kochi, 15 July 2019, R. Serita leg.

Etymology. The specific name is an adjective (“longhanded” in Latin) refers to the elongated palps of males in the species.

Diagnosis. Micaria longimana sp. nov. closely resem-bles M. dives in general appearance and elongated male palps, but can be distinguished based on the following characters: spines on the prolateral side of cymbium and palpal tibia relatively thicker (vs. relatively thin in M. dives ; Fig. 5B, C , cf. Fig. 5E ); blunt, membranous median apophysis locat-ed on distal end of the bulb (vs. MA thin and apophysis with hook-like tip in M. dives ; Figs 5A–C , 6A–C , cf. Fig. 5D–F ); TA short, blunt and very weakly developed (vs. TA distinctively developed in M. dives ; Fig. 6A , cf. Fig. 5D ); bulb thinner and shorter in relation to the cymbium length (PBT/ CL 0.218, PBL/CL 0.465 in M. longimana sp. nov. vs. PBT/ CL 0.401, PBL/CL 0.670 in M. dives ; Figs 5B , 6B vs. Fig. 5E ); palpal tibia longer in relation to the cymbium length (PTL/ CL 1.014 in M. longimana sp. nov. vs. PTL/CL 0.792 in M. dives ; Fig. 5A, B vs. Fig. 5D, E ); AEM absent (vs. present in M. dives ; cf. Fig. 5G , cf. Fig. 5H ) and a pair of short transverse furrows at CO (vs. longitudinal furrows in M. dives ; Fig. 5G , cf. Fig. 5H ); CD positioned at anterior side of internal genitalia and inserted to anterior-mesial side of Sp (vs. CO and Sp are close to each other and CD inserted to posterior-mesial side of Sp in M. dives ; Fig. 5G, I, J , cf. Fig. 5H ; Fig. 6D, E ).

Micaria pulcherrima Caporiacco, 1935 , M. formicaria (Sundevall, 1831) and M. yeniseica Marusik and Koponen, 2002 also possess elongated male palpal tibia, but can easily be distinguished from M. longimana sp. nov. by having distinctive TA ( Yin et al. 2012: fig. 636E–G; Tuneva 2007: figs 36–38; Marusik et al. 2002: figs 1, 2). Micaria atropatene Zamani and Marusik, 2021 also has a similar palp but differs by lacking strong spines on prolateral side of cymbium and tibia, and bearing a distal tegular process ( Zamani and Marusik 2021: fig. 8A, B).

Description. Male (holotype: NSMT-Ar 22042). Body 2.92 long. Carapace 1.47 long, 0.93 wide. Eye sizes: AME 0.04 ALE 0.05, PME 0.04, PLE 0.03. MOA anterior width 0.22, posterior width 0.30, length 0.14. Length of palp. 0.665+0.339+0.417+0.411=1.832. Cymbial length/width 2.91. Palpal femur length/cymbial length 1.58. Length of legs. I, 1.08+0.40+0.85+0.79+0.67=3.79; II, 0.87+0.33+ 0.62+0.66+0.64=3.12; III, 0.74+0.29+0.55+0.64+0.46= 2.68; IV, 1.12+0.41+0.94+1.00+0.73=4.20. Abdomen 1.44 long, 0.70 wide.

Anterior surface of chelicera with macrosetae. Ventral side of tibia I and metatarsus I covered with long thin setae. Leg spination. Femur: I d1-1, p1; II d1. Tibia: II v1; III v1; IV v2. Metatarsus: II v1; III v2-2-2; IV: v2-2-2. Palp ( Figs 5A–C , 6A–C ): femur with an array of short spines on ventral and anterolateral sides; patella with a spine on prolateral side; tibia as long as cymbium (PTL/CL 1.014), with 2 long and strong spines on prolateral and dorso-prolateral sides; TA short, rounded, weakly developed; cymbium with 2 strong spines on the basal prolateral side; palpal bulb longer than wide; SD visible, emerging from distal part, running toward posterior side and strongly curved at posterior prolateral side, end at Em; Em short, slightly curved, with pointed tip; MA membranous with blunt, wide tip, positioned along with TO.

Coloration and markings. Carapace reddish brown with flat, glittering purple hairs on cephalic region and transverse white line on thoracic region. Mouthparts and sternum dark reddish brown. Coxae of legs pale yellow, femora dark brown, from patella to the tip of leg I pale yellowish brown. All legs lacking annulations. Abdomen dark brown with glittering purple hairs. Dorsum of abdomen with two pairs of white spots.

Female (paratype: NSMT-Ar 22043). Body 2.96 long. Carapace 1.15 long, 0.68 wide. Eye sizes: AME 0.04, ALE 0.05, PME 0.03, PLE 0.03. MOA anterior width 0.20, posterior width 0.28, length 0.12. Length of legs. I, 0.75+0.34+0.59+ 0.55+0.50=2.73; II, 0.87+0.33+0.62+0.66+0.64=3.12; III, 0.74+0.29+0.55+0.64+0.46=2.68; IV, 0.92+0.36+ 0.77+0.82+0.54=3.41. Abdomen 1.46 long, 0.83 wide.

Carapace, mouthparts and legs as in males. Palp spination. Tibia: p1-1, tarsus: p1, d1-1, v1-1. Leg spination. Femur I: d1, p1. Tibia: I p1-1; II v1; III v1-2; IV v2. Metatarsus: I p1, r1; II v1; III v2-2; IV v2. Internal genitalia ( Figs 5H, I , 6D, E ). Palpal femur with an array of short spines on venter. Abdomen as in male. Epigyne ( Fig. 5F ): furrows absent on anterior epigynal margin, a pair of furrows carved laterally from copulatory openings to the center; Sp oval, apart each other; globular pockets present on lateral sides of CO (arrow in Fig. 6E ); CD curved, apart each other, insert-ed to upper side of Sp; FD emerging from ventral side of Sp and running to dorsal side.

Coloration and markings as in males.

Habitat. The specimens were collected from open and disturbed environments such as grasslands in parks at urban area, suggesting that the species might be introduced from other regions.

Distribution. Okinawa Is., Japan.

Note. Males and females are regarded conspecific because no other species of Micaria was sympatrically collect-ed.

Figures

Fig. 4. Micaria longimana Suzuki, sp. nov., holotype male (NSMT-Ar 22042: A, C, D) and paratype female (NSMT-Ar 22043: B. E, F). A, B, Habitus of living individuals; C, E, habitus, dorsal view; D, F, habitus, ventral view. Scale bars: 1.0mm.

Fig. 5. Genitalia of Micaria longimana Suzuki, sp. nov., holotype male (NSMT-Ar 22042: A–C) and paratype female (NSMT-Ar 22043: G, I, J); M. dives male (NSMT-Ar 22047: D–F) and female (NSMT-Ar 22047: H). A, D, Left palp, retrolateral view; B, E, ditto, prolateral view; C, F, ditto, ventral view; G, H, epigyne, ventral view; I, epigyne, clarified ventral view; J, internal genitalia, dorsal view. Abbreviations: AEM, anterior epigynal margin. Scale bars: 0.2mm (A, B, D, E); 0.1mm (C, F–J).

Fig. 6. Genitalia of Micaria longimana Suzuki, sp. nov., holotype male (NSMT-Ar 22042: A–C) and paratype female (NSMT-Ar 22043: F, H, I). A, Left palp, retrolateral view; B, ditto, prolateral view; C, ditto, ventral view; D, epigyne, clarified ventral view; E, internal genitalia, dorsal view. Abbreviations: CD, copulatory ducts; CL, cymbial length; CO, copulatory opening; Em, embolus; FD, fertilization duct; MA, median apophysis; PBT, palpal bulb thickness; PTL, palpal tibial length; SD, sperm duct; Sp, spermatheca; TA, tibial apophysis, TO, tegular outgrowth. Arrow indicates a globular pocked on lateral side of copulatory openings. Scale bars: 0.2mm (A, B, D); 0.1mm (C, F–I).