identifier	taxonID	type	CVterm	format	language	title	description	additionalInformationURL	UsageTerms	rights	Owner	contributor	creator	bibliographicCitation
2B808D0126315AD2BD305C16B7D705D6.text	2B808D0126315AD2BD305C16B7D705D6.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Nesticus echigonus Yaginuma 1986	<div><p>Nesticus echigonus Yaginuma, 1986</p><p>Figs 2 C, 2 D, 5 A – H, 6 A – D, 7 A, 7 B</p><p>Nesticus echigonus Yaginuma, 1986: 27, figs 6–12, (original description).</p><p>Nesticus echigonus — Kamura and Irie 2009: 349, figs 34, 35.</p><p>Japanese name.</p><p>Echigo-Horahimegumo エチゴホラヒメグモ.</p><p>Materials examined.</p><p>Japan: Honshu Island, Niigata Pref.: • 1 ♂ (holotype), Kitauonuma-gun, Irihirose-mura (now Uonuma city), Mt. Asakusadake, 1010 m elev., 5 August 1984, S. - I. Uéno leg. (NSMT -Ar 1914) • 1 ♂, 1 ♀ (paratypes), same locality and date (NSMT -Ar 1915 and Ar 1917) • 1 ♂, same locality (37.3561°N, 139.2204°E), 937 m elev., juvenile specimen, collected on 03 July 2021, matured in laboratory on 15 July 2021, T. Nagai leg., gaps between stones near mountain stream (NSMT -Ar 27111) • 1 ♀, same locality, 30 October 2023, T. Nagai leg., gaps between stones near mountain stream (NSMT -Ar 27112) • 1 ♀, same locality, date, and environment, T. Nagai leg. (TNPC) .</p><p>Diagnosis.</p><p>Male of N. echigonus can be distinguished from males of N. gondai by the following combination of characters: median apophysis (Ma) conical, ending sharp (vs rectangular, ending blunt); tegular apophysis (Ta) scarcely developed forming only small, short bumps (vs well developed, triangular). Additionally, the paracymbium (P) shows several differences in its projections including two curved dorsal apophyses (Da 1 –2) situated near the distal portion of P (vs straight, located at the middle) and Di shaped as a tapering plate-like structure (vs clavate and bearing two apices) (cf. Fig. 5 B – H, Yaginuma 1986: figs 5–7 vs Fig. 8 B – H, Yaginuma 1979: figs 2–1, 2–4).</p><p>Female of N. echigonus can be distinguished from female of N. gondai by the following combination of characters: the scape (Sc) is flattened at the distal end (vs tapering); a median septum (Ms) on dorsal side of Sc with parallel borders (vs V-shaped, cf. Fig. 6 A – D, Yaginuma 1986: figs 11, 12 vs Fig. 9 A – D, Yaginuma 1979: figs 2–2, 2–3).</p><p>For comparisons with N. yamabushi sp. nov., see the diagnosis of that species.</p><p>Redescription of male (holotype).</p><p>Total length 4.27. Prosoma 1.95 long, 1.79 wide. Habitus as in Fig. 5 A; habitus of a freshly collected individual as in Fig. 2 C. Carapace light yellowish brown, slightly darker along midline and edge. Eye diameter: AME 0.07, ALE 0.13, PME 0.16, PLE 0.13. Eye interdistances: AME - ALE 0.03, ALE - PLE 0.00, PME - PLE 0.03. Clypeus 0.25 long. Chelicerae whitish yellow; maxillae whitish yellow, white near pit; labium whitish yellow. Sternum yellowish grey, with dark coloured edging. Legs whitish yellow, with indistinct dark bands. Legs measurements: I 14.49 (3.94, 0.94, 4.09, 4.04, 1.47), II 11.18 (3.17, 0.86, 2.88, 3.09, 1.18), III 8.30 (2.55, 0.69, 1.89, 2.22, 0.95), IV 11.07 (3.36, 0.70, 2.98, 2.98, 1.05). Leg formula: I, II, IV, III. Dorsal opisthosoma greyish yellow, with black paired marks; ventral opisthosoma anteriorly greyish yellow, posteriorly greyish yellow, darker around spinnerets. Spinnerets whitish yellow.</p><p>Palps as in Fig. 5 B - H. Cymbium (C) oval, with sparse setae. Sparse setae on dorsal side of paracymbium (P) and tibia. Paracymbium (P) with 1 distal (Di), 3 dorsal (Da 1 –3), and 1 ventral (Va) apophyses: Di small, thorn-like, antero-dorsally protruding, Da 1 -3 short and pointed, Da 1 and Da 2 curved, dorso-medially protruding at distal part of P; Da 3 medially protruding; Va bulky, medially protruding, ending with a rounded tip. Two additional small denticles between Da 1 and Di (but see remarks on variation). Embolus (E) black and filiform, starting at approximately 5 - o’clock position on radix (Rx). Median apophysis (Ma) conical, protruding medially, approximately as long as its width at base. Tegular apophysis (Ta) only slightly developed, shaped as tiny, sclerotized bumps. Conductor complex with 3 processes (Pc 1 -3): Pc 1 plate-like, with single sclerotized projection on posterior side; Pc 2 anterior to Pc 1, sickle-shaped, ending pointed; Pc 3 ventral to Pc 2, shaped as a translucent plate with its margin curving ventrally, bearing a dorsal projection extending counterclockwise and wrapping around a part of E.</p><p>Redescription of female (one voucher specimen).</p><p>Total length: 3.86. Carapace 1.86 long, 1.64 wide. Habitus as in Fig. 2 D. Eye diameter: AME 0.09, ALE 0.15, PME 0.15, PLE 0.15. Eye interdistances: AME - ALE 0.03, ALE - PLE 0.00, PME - PLE 0.04. Clypeus 0.23 long. Legs measurements: I 12.41 (3.52, 0.75, 3.41, 3.22, 1.50), II 9.90 (2.90, 0.82, 2.50, 2.51, 1.17), III 7.07 (2.24, 0.68, 1.50, 1.73, 0.93), IV 9.86 (3.16, 0.74, 2.82, 2.76, 1.19). Leg formula: I, II, IV, III. Colouration and other somatic features as in male.</p><p>Epigyne and vulva as in Fig. 6 A - D. Scape (Sc) tongue-like, with curved distal end slightly bent dorsally when observed laterally. Median septum (Ms) on dorsal side of Sc extending along the median line with parallel borders. Copulatory openings (Co) approximately at center of Sc. Insemination and fertilization ducts (Id + Fd) anteriorly extending, reaching spermatheca (S) after laterally turning; medial vulval pocket (VpM) sclerotized, posteriorly convex; anterior vulval pocket (VpA) wide, sack-like, translucent and wrinkled, extending from anterior side of VpM. Spermatheca (S), small, rounded, located at base of VpM.</p><p>Size variation.</p><p>Male (n = 2): total length: 3.67–4.27; carapace 1.88–1.95 long, 1.78–1.79 wide; female (n = 3): total length: 3.48–5.12, carapace 1.64–2.13 long, 1.39–1.97 wide.</p><p>Remarks on variation.</p><p>The presence of small denticles on the distal end of the paracymbium of the male palp, between Da 1 and Di, is variable, as some individuals lack one or both these apophyses (cf. Fig. 7 A vs Fig. 7 B vs Yaginuma 1986: figs 7-10).</p><p>Distribution.</p><p>Known only from the surrounding area of Mt. Asakusadake, in Niigata Prefecture, Japan (Fig. 10).</p></div>	https://treatment.plazi.org/id/2B808D0126315AD2BD305C16B7D705D6	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Pensoft via Plazi	Nagai, Toshimichi;Ballarin, Francesco;Eguchi, Katsuyuki	Nagai, Toshimichi, Ballarin, Francesco, Eguchi, Katsuyuki (2026): Integrative taxonomy of the genus Nesticus in central Japan, with the description of a new species and redescriptions of N. echigonus and N. gondai (Araneae, Nesticidae). ZooKeys 1285: 125-145, DOI: 10.3897/zookeys.1285.202554
1C47B9B9F59E503EB538E79515A7EB5D.text	1C47B9B9F59E503EB538E79515A7EB5D.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Nesticus gondai Yaginuma 1979	<div><p>Nesticus gondai Yaginuma, 1979</p><p>Figs 2 E, 2 F, 8 A – H, 9 A – D</p><p>Nesticus gondai Yaginuma, 1979: 263, pl. 2, figs 1–4 (original description).</p><p>Cyclocarcina gondai — Lehtinen and Saaristo 1980: 59 (from Nesticus).</p><p>Nesticus gondai — Kamura and Irie 2009: 345, figs 15, 16</p><p>Japanese name.</p><p>Kirizumi-Horahimegumo キリズミホラヒメグモ.</p><p>Materials examined.</p><p>Japan: Honshu Island, Gunma Pref.: • 1 ♂ (holotype), Usui-gun, Kirizumi (now Annaka City, Matsuida town, Sakamoto), 27 July 1970, S. Gonda leg. (OMNH -Ar Type-86) • 1 ♀ (paratype), same locality and data (OMNH) • 1 ♂, Annaka City, Matsuida town, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=138.7043&amp;materialsCitation.latitude=36.36418" title="Search Plazi for locations around (long 138.7043/lat 36.36418)">Sakamoto, nearby Kirizumi dam lake</a>, (36.36418°N, 138.7043°E), 569 m elev., 27 December 2020, T. Nagai leg., inside a culvert (NSMT -Ar 27113) • 1 ♀, same locality, (36.3685°N, 138.6989°E), 660 m elev., 28 March 2026, T. Nagai leg., inside a culvert (NSMT -Ar 27114) • 1 ♀, same locality, date, and environment, T. Nagai leg. (TNPC) .</p><p>Diagnosis.</p><p>See the diagnosis of N. yamabushi sp. nov. and N. echigonus .</p><p>Redescription of male (holotype).</p><p>Total length 3.97. Prosoma 2.00 long, 1.77 wide. Habitus as in Fig. 8 A, habitus of a freshly collected individual as in Fig. 2 E. Carapace light yellowish brown, darker along midline and edge. Eye diameter: AME 0.11, ALE 0.14, PME 0.15, PLE 0.13. Eye interdistances: AME - ALE 0.04, ALE - PLE 0.00, PME - PLE 0.04. Clypeus 0.41 long. Chelicerae whitish yellow, maxillae whitish yellow, white near pit, labium yellowish grey. Sternum yellowish grey, with dark edging. Legs yellowish brown, with indistinct dark bands. Legs measurements: I 15.39 (4.13, 0.94, 4.30, 4.37, 1.63), II 11.97 (3.41, 0.84, 3.08, 3.33, 1.31), III 8.88 (2.72, 0.69, 2.00, 2.45, 1.02), IV 12.31 (3.76, 0.80, 3.13, 3.41, 1.20). Leg formula: I, IV, II, III. Dorsal opisthosoma whitish yellow, with paired black marks; ventral opisthosoma anteriorly yellowish grey, posteriorly whitish yellow, with darkish U-shaped band, greyish yellow around spinnerets. ALS whitish yellow, others yellowish grey.</p><p>Palps as in Fig. 8 B – H. Cymbium (C) oval, with sparse setae. Sparse setae on dorsal side of paracymbium (P) and tibia. Paracymbium with 1 distal (Di), 2 dorsal (Da 1 –2), and 1 ventral (Va) apophyses: Di extending antero-dorsally, clavate, with flattened, elongated tip with two prongs; Da 1 and Da 2 on dorsal-medial side of the P, both short and sharp, Da 1 connected to Di by a furrow; Va bulky, protruding medially, tapering and flattened toward the tip. Embolus (E) black and filiform, starting at approximately 5 - o’clock position on radix (Rx). Median apophysis (Ma) rectangular, medially protruding, with blunt end. Tegular apophysis (Ta) spine-like, strongly sclerotized. Conductor complex with 3 processes (Pc 1 -3): Pc 1 plate-like, with single sclerotized projection on posterior side; Pc 2 anterior to Pc 1, sickle-shaped with pointed tip; Pc 3 ventral to Pc 2, shaped as a translucent plate with its margin curving ventrally, bearing a dorsal projection extending counterclockwise and wrapping around a part of E.</p><p>Redescription of female (one voucher specimen).</p><p>Total length: 4.25. Carapace 2.04 long, 1.80 wide. Habitus as in Fig. 2 F. Eye diameter: AME 0.11, ALE 0.17, PME 0.14, PLE 0.15. Eye interdistances: AME – ALE 0.06, ALE - PLE 0.00, PME – PLE 0.06. Clypeus 0.33 long. Legs measurements: I 14.30 (4.04, 0.96, 3.96, 3.76, 1.58), II 11.25 (2.65, 0.75, 2.87, 2.81, 1.25), III 9.32 (2.65, 0.75, 1.87, 2.10, 1.21), IV 11.54 (3.73, 0.87, 2.93, 2.80, 1.21). Leg formula: I, IV, II, III. Colouration and other somatic features as in male.</p><p>Epigyne and vulva as in Fig. 9 A – D. Scape (Sc) subtriangular, distally tapering, with flat distal end slightly ventrally bent when observed laterally. Median septum (Ms) on dorsal side of Sc V-shaped, distally protruding, extending from tip of Sc to copulatory openings (Co) for a distance subequal to width of Sc then following curvature of copulatory opening (Co). Copulatory opening (Co) approximately at centre of Sc. Insemination and fertilization ducts (Id + Fd) extending anteriorly, reaching spermatheca (S) after turning laterally; medial vulval pocket (VpM) curved and rounded, extending medially; anterior vulval pocket (VpA) round, translucent and wrinkled, extending from anterior side of VpM. Spermatheca (S) small, rounded, located at base of VpM.</p><p>Size variation.</p><p>Male (n = 2): total length: 3.97–4.21; carapace 1.95–2.00 long, 1.75–1.78 wide; female (n = 3): total length: 3.66–4.25, carapace 1.54–2.04 long, 1.48–1.80 wide.</p><p>Distribution.</p><p>Known only from the surroundings of Kirizumi-onsen spring, Annaka City, Gunma Prefecture, Japan (Fig. 10).</p><p>Molecular analysis.</p><p>In our phylogenetic tree (Fig. 11), Nesticus yamabushi sp. nov. was recovered as monophyletic, forming a distinct clade (Bootstrap Value / SH-aLRT: 99.6 / 100), clearly separated from its close relatives, N. gondai and N. echigonus (92.1 / 74) as its putative sister group. All these clades exhibited long basal branches, supporting their separation.</p><p>In the analysis of genetic distances (Table 2), the divergence between N. yamabushi sp. nov. and N. gondai was 3.5 %. The genetic distances between N. yamabushi sp. nov. and N. echigonus ranged from 4.4 % to 5.2 %, while the distance between N. echigonus and N. gondai was 4.3 %. These values provide further evidence that all three species treated in this study are genetically differentiated from one another. The maximum intraspecific genetic distance within N. yamabushi sp. nov. was only 0.2 %.</p></div>	https://treatment.plazi.org/id/1C47B9B9F59E503EB538E79515A7EB5D	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Pensoft via Plazi	Nagai, Toshimichi;Ballarin, Francesco;Eguchi, Katsuyuki	Nagai, Toshimichi, Ballarin, Francesco, Eguchi, Katsuyuki (2026): Integrative taxonomy of the genus Nesticus in central Japan, with the description of a new species and redescriptions of N. echigonus and N. gondai (Araneae, Nesticidae). ZooKeys 1285: 125-145, DOI: 10.3897/zookeys.1285.202554
2F675A85A7985B8C97FFE51020BB396E.text	2F675A85A7985B8C97FFE51020BB396E.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Nesticus Thorell 1869	<div><p>Genus Nesticus Thorell, 1869</p><p>Type species.</p><p>Araneus cellulanus Clerck, 1757 from Sweden.</p></div>	https://treatment.plazi.org/id/2F675A85A7985B8C97FFE51020BB396E	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Pensoft via Plazi	Nagai, Toshimichi;Ballarin, Francesco;Eguchi, Katsuyuki	Nagai, Toshimichi, Ballarin, Francesco, Eguchi, Katsuyuki (2026): Integrative taxonomy of the genus Nesticus in central Japan, with the description of a new species and redescriptions of N. echigonus and N. gondai (Araneae, Nesticidae). ZooKeys 1285: 125-145, DOI: 10.3897/zookeys.1285.202554
5F04D1419EC35FFFA12B35CBC21B38C7.text	5F04D1419EC35FFFA12B35CBC21B38C7.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Nesticus yamabushi Nagai & Ballarin & Eguchi 2026	<div><p>Nesticus yamabushi sp. nov.</p><p>Figs 1 A, 2 A, 2 B, 3 A – G, 4 A – D</p><p>Japanese name.</p><p>Yamabushi-Horahimegumo ヤマブシホラヒメグモ.</p><p>Materials examined.</p><p>• ♂ Holotype: Japan: Honshu Island, Niigata Pref.: Uonuma City, Tsunan Town, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=138.5904&amp;materialsCitation.latitude=36.9998" title="Search Plazi for locations around (long 138.5904/lat 36.9998)">Mt. Yamabushiyama</a>, (36.9998°N, 138.5904°E), 306 m elev., 11 June 2022, T. Nagai leg., gaps between stones near mountain stream. (NSMT -Ar 27107) .</p><p>Paratypes: • 1 ♂, same locality as holotype, 14. Jun. 2022, T. Nagai leg., gaps between stones near mountain stream (NSMT -Ar 27108) • 2 ♀, same locality and collection date as holotype, T. Nagai leg., gaps between stones near mountain stream (NSMT -Ar 27109) • 1 ♀, Tokamachi City, Amamizukoshi, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=138.35&amp;materialsCitation.latitude=37.02374" title="Search Plazi for locations around (long 138.35/lat 37.02374)">bank of Koedougawa river</a> (37.02374°N, 138.350°E), 566 m elev., 02 August 2017, Y. Suzuki leg. under stones near mountain stream. (NSMT -Ar 27110) • 1 ♂, Tokamachi City, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=138.5855&amp;materialsCitation.latitude=37.0508" title="Search Plazi for locations around (long 138.5855/lat 37.0508)">Amamizu Park</a> (37.0508°N, 138.5855°E), 446 m elev., 03 November 2020, mature on 11 January 2021, T. Nagai leg., gaps between stones in park (OMNH) • 1 ♀, same locality, collection date, and environment, T. Nagai leg. (OMNH) • 1 ♂, Uonuma City, Tsunan Town, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=138.5936&amp;materialsCitation.latitude=37.001" title="Search Plazi for locations around (long 138.5936/lat 37.001)">Mt. Yamabushiyama</a>, (37.0010°N, 138.5936°E), 341 m elev., 12 November 2020, mature on 01 December 2020, T. Nagai leg., gaps between stones near mountain stream, (MNSK -Nes 001) • 1 ♀, same locality, collection date, and environment, T. Nagai leg. (MNSK -Nes 002) • 1 ♂, 2 ♀, same locality, collection date, and environment, (36.9998°N, 138.5904°E), 306 m elev., T. Nagai leg. (MNHH) .</p><p>Other materials examined.</p><p>• 2 ♀, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=138.5854&amp;materialsCitation.latitude=37.0508" title="Search Plazi for locations around (long 138.5854/lat 37.0508)">Amamizu Park</a> (37.0508°N, 138.5854°E), 446 m elev., 03 November 2020, T. Nagai leg., gaps between stones at park, (TNPC) • 1 ♀, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=138.5817&amp;materialsCitation.latitude=37.0161" title="Search Plazi for locations around (long 138.5817/lat 37.0161)">Mt. Yamabushiyama</a> (37.0161°N, 138.5817°E), 651 m elev., 12 December 2020, T. Nagai leg., gaps between stones near mountain stream, (TNPC) • 1 ♀, same locality and environment, 22 March 2021, (36.9998°N, 138.5904°E), 306 m elev., T. Nagai leg. (TNPC) .</p><p>Etymology.</p><p>The specific name is derived from the type locality, Mount Yamabushiyama (山伏山). It is treated as a noun in apposition.</p><p>Diagnosis.</p><p>Nesticus yamabushi sp. nov. closely resembles Nesticus gondai Yaginuma, 1979 and Nesticus echigonus Yaginuma, 1986 in the morphology of the genitalia. Differences between the new species and the above two congeneric species are as follows. Male of the new species can be distinguished from males of the latter two species by the following combination of characters: a massive, conical median apophysis (Ma), approximately two times longer than its width at the base, and ending with a pointed tip (vs smaller, with length approximately equal to its width at the base in both other species, but also rectangular in N. gondai); a tegular apophysis (Ta) with a triangular projection and several small denticles at its base (vs a single small projection lacking denticles in N. gondai, or lacking any clear projection in N. echigonus); the presence of a 4 th process (Pc 4) of the conductor complex (vs absent). Additionally, the paracymbium of the new species shows several differences in its projections including a distal process (Di) very long and pointed (vs very short in the other species). (cf. Fig. 3 A – G vs Figs 5 B – H, 8 B – H, 8 Y aginuma 1979: figs 2–1, 2–4, and Yaginuma 1986: figs 6, 7).</p><p>Females of the new species can be distinguished from females of N. echigonus and N. gondai by the following combination of characters: scape (Sc) trapezoidal (vs more triangular); with a wide distal end concave posteriorly (vs flat or convex); medial vulval pocket (VpM) plate-like and extended anteriorly (vs posteriorly convex in N. echigonus and medially extending in N. gondai) (cf. Fig. 4 A – D vs Figs 6 A – D, 9 A – D, Yaginuma 1979: figs 2–2, 2–3, Yaginuma 1986: figs 11, 12).</p><p>Description of male (holotype).</p><p>Total length 3.37. Prosoma 1.74 long, 1.64 wide. Habitus as in Fig. 2 A. Carapace yellowish brown, darker along midline and edge. Eye diameter: AME 0.08, ALE 0.12, PME 0.12, PLE 0.12. Eye interdistances: AME - ALE 0.05, ALE - PLE 0.00, PME - PLE 0.03. Clypeus 0.28 long. Chelicerae yellowish brown, maxillae whitish yellow, white near pit; labium yellowish grey. Sternum yellowish grey, with dark-coloured edging. Legs yellowish brown, with dark bands. Legs measurements: I 14.53 (3.85, 0.84, 4.10, 4.12, 1.61), II 10.88 (3.07, 0.80, 2.84, 2.91, 1.26), III 8.09 (2.48, 0.63, 1.95, 2.04, 0.98), IV 11.01 (3.35, 0.74, 2.87, 2.90, 1.15). Leg formula: I, IV, II, III. Dorsal opisthosoma whitish yellow, with black paired marks; ventral opisthosoma anteriorly yellowish grey, posteriorly whitish yellow, with a pair of darkish stripes, greyish yellow around spinnerets. PLS yellowish grey; others whitish yellow.</p><p>Palps as in Fig. 3 A – G. Cymbium (C) oval, with sparse setae. Sparse setae on dorsal side of paracymbium (P) and tibia. Paracymbium with 1 distal (Di), 2 dorsal (Da 1 –2) and 1 ventral (Va) apophyses: Di sharp and long, curved medially with a 90 ° angle, ending pointed; Da 1 shorter than Di and curved anteriorly, tough, protruding anteriorly, ending sharp; Da 2 short and thick, pointed, headed dorsally; Va bulky, protruding medially, ending rounded. Embolus (E) black and filiform, starting at approximately 5 - o’clock position on radix (Rx). Median apophysis (Ma) conical, with pointed tip, strongly protruding dorso-retrolaterally, approximately 2 times longer than its width at base. Tegular apophysis (Ta) strongly sclerotized, triangular, with several saw-like denticles on prolateral edge of radix. Conductor complex with 4 processes (Pc 1 -4): (Pc 1) plate-like, with single sclerotized and spatula-like projection on posterior side; Pc 2 anterior to Pc 1, sickle-shaped, strongly sclerotized, ending pointed; Pc 3 ventral to Pc 2, shaped as a translucent plate with margin curving ventrally, bearing a dorsal projection extending counterclockwise and wrapping around part of E; Pc 4 club-shaped, strongly sclerotized, protruding prolaterally from base of Pc 1 under Ma.</p><p>Description of female (one of the paratypes).</p><p>Total length: 4.30. Carapace 1.91 long, 1.71 wide. Habitus as in Fig. 2 B. Eye diameter: AME 0.10, ALE 0.18, PME 0.14, PLE 0.15. Eye interdistances: AME – ALE 0.04, ALE - PLE 0.00, PME – PLE 0.07. Clypeus 0.26 long. Legs measurements: I 13.40 (3.75, 0.91, 3.69, 3.55, 1.50), II 10.19 (2.97, 0.86, 2.55, 2.63, 1.19), III 7.59 (2.36, 0.74, 1.64, 1.89, 0.97), IV 10.66 (3.33, 0.87, 2.67, 2.66, 1.13). Leg formula: I, IV, II, III. Colouration and other somatic features as in male.</p><p>Epigyne and vulva as in Fig. 4 A – D. Scape (Sc) trapezoidal, with concave distal end, slightly bent dorsally when observed laterally. Sclerotized furrows extending from distal end of Sc to copulatory openings for a distance subequal to width of Sc before invaginating. Copulatory opening (Co) approximately at centre of Sc. Insemination and fertilization ducts (Id + Fd) extending anteriorly, reaching spermatheca (S) after turning laterally; medial vulval pocket (VpM) plate-like, extended anteriorly; anterior vulval pocket (VpA) wide, sack-like, translucent, and wrinkled, extending from anterior side of VpM. Spermatheca (S), small, rounded, located at base of VpM.</p><p>Size variation.</p><p>Male (n = 3): total length: 3.56–4.59; carapace 1.74–2.01 long, 1.64–1.84 wide; female (n = 5): total length: 3.96–5.52, carapace 1.80–1.94 long, 1.61–1.77 wide.</p><p>Distribution.</p><p>Known only from the surroundings of Mt. Yamabushiyama, in Niigata Prefecture, Japan (Fig. 10).</p></div>	https://treatment.plazi.org/id/5F04D1419EC35FFFA12B35CBC21B38C7	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Pensoft via Plazi	Nagai, Toshimichi;Ballarin, Francesco;Eguchi, Katsuyuki	Nagai, Toshimichi, Ballarin, Francesco, Eguchi, Katsuyuki (2026): Integrative taxonomy of the genus Nesticus in central Japan, with the description of a new species and redescriptions of N. echigonus and N. gondai (Araneae, Nesticidae). ZooKeys 1285: 125-145, DOI: 10.3897/zookeys.1285.202554
