identifier	taxonID	type	CVterm	format	language	title	description	additionalInformationURL	UsageTerms	rights	Owner	contributor	creator	bibliographicCitation
27280652996A3129C1B6FC03E56CD052.text	27280652996A3129C1B6FC03E56CD052.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Psechrus Thorell 1878	<div><p>sinensis group</p><p>For description and diagnosis of the sinensis group see Bayer (2012: 96–97). All four new species described in the present study belong to the sinensis group.</p></div>	https://treatment.plazi.org/id/27280652996A3129C1B6FC03E56CD052	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.		Plazi	Chen, Run;Yang, Zi-Zhong	Chen, Run, Yang, Zi-Zhong (2026): Four new species of the genus Psechrus Thorell, 1878 (Araneae: Psechridae) from Yunnan Province, China. European Journal of Taxonomy 1081: 1-27, DOI: 10.5852/ejt.2026.1081.3311, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/3311/14557
27280652996A3129C113FDF7E598D76E.text	27280652996A3129C113FDF7E598D76E.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Psechrus Thorell 1878	<div><p>Genus Psechrus Thorell, 1878</p><p>Fig. 2</p><p>Diagnosis</p><p>For description and diagnosis of the genus see Bayer (2012).</p></div>	https://treatment.plazi.org/id/27280652996A3129C113FDF7E598D76E	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.		Plazi	Chen, Run;Yang, Zi-Zhong	Chen, Run, Yang, Zi-Zhong (2026): Four new species of the genus Psechrus Thorell, 1878 (Araneae: Psechridae) from Yunnan Province, China. European Journal of Taxonomy 1081: 1-27, DOI: 10.5852/ejt.2026.1081.3311, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/3311/14557
27280652996A3123C110FB3FE321D21E.text	27280652996A3123C110FB3FE321D21E.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Psechrus mingshengi Chen & Yang 2026	<div><p>Psechrus mingshengi sp. nov.</p><p>urn:lsid:zoobank.org:act: B4F0F3D2-B793-48B6-8E86-CD33B9392C29</p><p>Figs 1B, 3–6, 19; Table 1</p><p>Diagnosis</p><p>The new species belongs to the sinensis group and is most similar to P. discoideus Feng et al., 2016 (see Feng et al. 2016: 191–193, figs 9–11) in the morphology of the male palp and female epigyne, but can be distinguished by the following combination of characters: palp with the prolateral tuberculate extension of the conductor prominent and auriform (vs extension discoid in P. discoideus); conductor oriented perpendicularly to the bulb in ventral view, possessing a dorsal mid-projection with a flattened, lamellar tip (vs projection absent in P. discoideus); embolus broad and flat-lamellar, tightly appressed to the conductor (vs narrower, needle-like, and separated from the conductor by a distinct gap in P. discoideus); sperm duct straight, with the embolus base positioned closer to the conductor (vs curved, with the embolus base more distant from the conductor in P. discoideus) (Fig. 3A–B, D); epigyne with the median septum nearly rectangular (vs subrectangular with lateral shoulders and a broad, trapezoidal outline, giving a ʻstrongman’s backʼ appearance in P. discoideus); copulatory openings laterally oriented and relatively large (vs smaller and differently oriented in P. discoideus). The female epigyne also resembles that of P. spatulatus Feng et al., 2016 (see Feng et al. 2016: 194–197, figs 12–14) in general morphology, but differs in the presence of a distinct dorsal atrial chamber connecting to the copulatory ducts, and in having elongate spermathecal heads which are approximately twice the diameter of the spermatheca (vs shorter in P. spatulatus) (Fig. 5D, F).</p><p>Etymology</p><p>The specific epithet is a patronym honoring the late Professor Ming-Sheng Zhu (Hebei University, China), in recognition of his outstanding contributions to Chinese arachnology.</p><p>Type material</p><p>Holotype</p><p>CHINA • ♂; Yunnan Province, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=102.44139&amp;materialsCitation.latitude=22.993889" title="Search Plazi for locations around (long 102.44139/lat 22.993889)">The Martyrs’ Cemetery</a> of Lüchun County, Honghe Hani and Yi Autonomous Prefecture; 22°59′38″ N, 102°26′29″ E; 1821.67 m a.s.l.; 6 Mar. 2025; Run Chen and Hong-Qiang Dai leg.; collection YNLC-25-0301; DUIER, LC2501.</p><p>Paratypes</p><p>CHINA • 4 ♂♂; same data as for holotype; collection YNLC-25-0301; DUIER LC2502 – LC2505 • 3 ♀♀; same data as for holotype; collection YNLC-25-0301; DUIER LC2506 – LC2508 • 2 ♀♀; Yunnan Province, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=102.78309&amp;materialsCitation.latitude=23.121428" title="Search Plazi for locations around (long 102.78309/lat 23.121428)">near the Yuanyang Terraced Fields Scenic Area</a>, Yuanyang County, Honghe Hani and Yi Autonomous Prefecture; 23°7′17.14″ N, 102°46′59.10″ E; 1885 m a.s.l.; 18 May 2015; Zi-Zhong Yang leg.; DUIER, YY1501, YY1502 .</p><p>Other material examined</p><p>CHINA • 1 ♀; Yunnan Province, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=102.46369&amp;materialsCitation.latitude=22.967417" title="Search Plazi for locations around (long 102.46369/lat 22.967417)">44 km along the road from Lüchun County to Pinghe Village</a>, Jinping County, Honghe Hani and Yi Autonomous Prefecture; 22°58′02.7″ N, 102°27′49.3″ E; 1880 m a.s.l.; 28 Jul. 2004; Zi-Zhong Yang leg.; DUIER, LCh01 • 1 ♀; Yunnan Province, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=104.158165&amp;materialsCitation.latitude=24.632668" title="Search Plazi for locations around (long 104.158165/lat 24.632668)">Junzi Mountain</a>, Shizong County, Qujing City; 24°37′57.6″ N, 104°09′29.4″ E; 2280 m a.s.l.; 3 Aug. 2008; Yu-Long Wang and Ben-Yong Mao leg.; DUIER, SiZ04 • 1 ♀; Yunnan Province, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=102.447975&amp;materialsCitation.latitude=22.98936" title="Search Plazi for locations around (long 102.447975/lat 22.98936)">The Martyrs’ Cemetery</a> of Lüchun County, Honghe Hani and Yi Autonomous Prefecture; 22°59′21.7″ N, 102°26′52.7″ E; 1930 m a.s.l.; 27 Jul. 2004; Zi-Zhong Yang leg.; DUIER, LCh02 • 2 juvs; same data as for preceding; DUIER, LCh03, LCh04 • 3 ♀♀; Yunnan Province, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=103.231804&amp;materialsCitation.latitude=22.90264" title="Search Plazi for locations around (long 103.231804/lat 22.90264)">Fenshuiling Nature Reserve</a>, Jinping County, Honghe Hani and Yi Autonomous Prefecture; 22°54′09.5″ N, 103°13′54.5″ E; 1560 m a.s.l.; 24 Jul. 2006; Zi-Zhong Yang leg.; DUIER, JP01 to JP03 .</p><p>Description</p><p>Male (holotype, DUIER LC2501; see Figs 3–4)</p><p>MEASUREMENTS. Total length 32.25; prosoma length 13.89, width 10.79; opisthosoma length 18.36, width 9.11.</p><p>EYES. Eye diameters: AME 0.42, ALE 0.41, PME 0.45, PLE 0.43. Eye interdistances: AME–AME 0.17, AME–ALE 0.05, PME–PME 0.17, PME–PLE 0.21, AME–PME 0.26, ALE–PLE 0.15. Clypeus height at AME 0.79.</p><p>PROSOMA. Yellowish-brown; ocular area slightly darker, reddish-brown. Fovea longitudinal; radial furrows distinct. Carapace with a well-defined brown median longitudinal band extending from posterior eye row to posterior margin, flanked by irregular dark striae. Chelicerae brown and robust, densely covered with fine setae; promargin with 3 teeth, retromargin with 4 large, closely spaced teeth. Sternum suboval, with a V-shaped brown patch medially; surface covered with black setae. Labium and endites brown, with relatively sparse setae.</p><p>OPISTHOSOMA. Dark brown. Dorsum with black markings and spots laterally, and several irregular white longitudinal lines. Ventral side dark brown, with a slender, distinct, white median stripe, flanked by two rows of small, indistinct muscle sigilla.</p><p>LEGS. Yellowish-brown, without spots or annuli. Leg formula: 1243. Measurements of palp and legs as shown in Table 1.</p><p>MALE PALP. Tibia with a small, indistinct retrolateral protrusion. Conductor base densely covered with small tubercles; distal projection prominent, with apex flattened and lamellar, oriented nearly perpendicular to tegulum. Embolus flat-lamellar, with its base in close proximity to conductor.</p><p>Female (paratype, DUIER LC2506; see Figs 5–6)</p><p>MEASUREMENTS. Total length 24.93; prosoma length 11.97, width 9.51; opisthosoma length 12.96, width 6.85.</p><p>EYES. Eye diameters: AME 0.42, ALE 0.45, PME 0.44, PLE 0.45. Eye interdistances: AME–AME 0.15, AME–ALE 0.10, PME–PME 0.37, PME–PLE 0.35, AME–PME 0.44, ALE–PLE 0.33. Clypeus height at AME 0.74.</p><p>SOMATIC CHARACTERS. Similar to male, but generally darker. Prosoma dark brown. Sternum with a dark brown V-shaped patch medially. Labium and endites reddish-brown, with denser setae than in male. Muscle sigilla on ventral side of opisthosoma larger and more distinct than in male. Other characters as in male.</p><p>EPIGYNE. The epigyne is approximately as long as wide, or slightly wider than long. Muscle sigilla and slit sense organ situated well away from the epigynal field; slit sense organs number 2–6. Median septum elongate, inversely trapezoidal, shield-shaped in outline, bearing a small lateral projection on each side at approximately two-thirds of its length; lateral lobes indistinct. Copulatory openings large. Copulatory ducts bearing a distinct atrial chamber. Spermathecal heads arising directly from the spermathecal base (not from the copulatory ducts), elongate and club-shaped, approximately 1.5–2 times the diameter of the spermathecal base.</p><p>Distribution</p><p>Lüchun County, Jinping County, Yuanyang County and Shizong County, Yunnan Province, China.</p></div>	https://treatment.plazi.org/id/27280652996A3123C110FB3FE321D21E	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.		Plazi	Chen, Run;Yang, Zi-Zhong	Chen, Run, Yang, Zi-Zhong (2026): Four new species of the genus Psechrus Thorell, 1878 (Araneae: Psechridae) from Yunnan Province, China. European Journal of Taxonomy 1081: 1-27, DOI: 10.5852/ejt.2026.1081.3311, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/3311/14557
2728065299603124C117F9F5E58BD2C3.text	2728065299603124C117F9F5E58BD2C3.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Psechrus luopingensis Chen & Yang 2026	<div><p>Psechrus luopingensis sp. nov.</p><p>urn:lsid:zoobank.org:act: DB762D3A-E45B-49F6-8224-0F07CEB92D52</p><p>Figs 1C, 2, 7–10, 19; Table 2</p><p>Diagnosis</p><p>The new species belongs to the sinensis group and most closely resembles P. obtectus Bayer, 2012 (see Bayer 2012: 106, fig. 57a–c) and P. jinggangensis Wang &amp; Yin, 2001 (see Zhao et al. 2021: 5–7, figs 1–3) in the morphology of the male palp, and P. changminae Feng et al., 2016 (see Feng et al. 2016: 181–184, figs 2–5) in the female epigyne, but can be distinguished by the following combination of characters: palp with the sperm duct featuring a distinct conical projection, which has not been found in any other known members of the sinensis group and thus constitutes a distinct diagnostic character for this species (Fig. 7A–D); embolus base with a large triangular projection directed toward the tegulum, occupying about ½ the width of the embolus base (vs projection digitiform or small/indistinct in comparison species); a distinct concavity extending from the embolus base to about ⅔ of its length (vs absent in both comparison species) (Fig. 7E); epigyne with the muscle sigilla weakly developed and remote from the epigynal field; median septum flask-shaped but with a shorter, broader neck and a wider base (vs neck longer and base narrower in P. changminae); dilated portion of the copulatory ducts not reflexed posteriorly (vs reflexed in P. changminae); spermatheca separated by more than three times their diameter; and spermathecal heads arising from the mesal bases of the spermatheca (Fig. 9D–E).</p><p>Etymology</p><p>The specific epithet is a toponym derived from the type locality, Luoping County, Yunnan Province, China; the suffix ʻ -ensis ʼ is a Latin adjectival suffix denoting provenance.</p><p>Type material</p><p>Holotype</p><p>CHINA • ♂; Yunnan Province, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=104.404724&amp;materialsCitation.latitude=25.011667" title="Search Plazi for locations around (long 104.404724/lat 25.011667)">Jiulong Waterfall</a>, Luoping County, Qujing City; 25°0′42″ N, 104°24′17″ E; 1221 m a.s.l.; 7 Mar. 2025; Run Chen and Hong-Qiang Dai leg.; collection YNLP-25-0303; DUIER, LP2501.</p><p>Paratypes</p><p>CHINA • 4 ♂♂; same data as for holotype; collection YNLP-25-0303; DUIER LP2502 – LP2505 • 4 ♀♀; same data as for holotype; collection YNLP-25-0303; DUIER LP2506 – LP2509 • 2 ♀♀; Yunnan Province, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=104.40467&amp;materialsCitation.latitude=25.011833" title="Search Plazi for locations around (long 104.40467/lat 25.011833)">Jiulong Waterfall</a>, Luoping County, Qujing City; 25°0′42.6″ N, 104°24′16.8″ E; 1263 m a.s.l.; 20 Jul. 2012; Ping Feng, Yan-Yan Ma and Ting-Bang Yang leg.; DUIER, LP06, LP07 • 1 ♀; Yunnan Province, Shuanglongying Township, Qiubei County, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=104.18275&amp;materialsCitation.latitude=24.249056" title="Search Plazi for locations around (long 104.18275/lat 24.249056)">Wenshan Prefecture</a>; 24°14′56.6″ N, 104°10′57.9″ E; 1530 m a.s.l.; 21 Jul. 2012; Ping Feng, Yan-Yan Ma and Ting-Bang Yang leg.; DUIER, QB01 .</p><p>Description</p><p>Male (holotype, DUIER LP2501; see Figs 7–8)</p><p>MEASUREMENTS. Total length 17.85; prosoma length 7.38, width 7.14; opisthosoma length 10.47, width 3.62.</p><p>EYES. Eye diameters: AME 0.42, ALE 0.45, PME 0.47, PLE 0.58. Eye interdistances: AME–AME 0.15, AME–ALE 0.06, PME–PME 0.20, PME–PLE 0.10, AME–PME 0.30, ALE–PLE 0.20. Clypeus height at AME 0.78.</p><p>PROSOMA. Grayish-yellow; ocular area reddish-brown. Fovea longitudinal; radial furrows pale. Carapace with a distinct, broad, dark gray median longitudinal stripe extending from between the posterior median eyes to the posterior margin; flanked by irregular black striae or spots. Sternum subcordate, brown, with a distinct suboval black patch medially; patch densely covered with setae; margins of sternum pale. Chelicerae dark brown and robust; promargin with 3 teeth, retromargin with 5 large, closely spaced teeth. Endites and labium reddish-brown; endites with dense promarginal scopulae; labium long trapezoidal, with anterior margin pale and wide, posterior margin dark brown and narrow.</p><p>OPISTHOSOMA. Dorsum brown, with dense, irregular gray patterns and spots. Lateral sides with several distinct, irregular white longitudinal lines of varying lengths. Ventral side dark brownish, with a slender white median stripe extending from the pedicel to the spinnerets; flanked by two rows of distinct, regularly arranged, pale muscle sigilla appearing as small pits.</p><p>LEGS. The femur to tibia of the legs are dark gray, while the metatarsus and tarsus are reddish-brown, without annuli or spots. Coxa I with short black spines (absent in female). Leg formula: 1243. Measurements of palp and legs as shown in Table 2.</p><p>MALE PALP. Relatively robust; patella and tibia comparatively short; tibia with a short, digitiform retrolateral process. Tegulum with a distinct conical projection on the outer-mesal surface, situated at the bend of the sperm duct. Conductor membranous and semi-transparent, with a sharply pointed distal tip. Embolus broadly triangular in outline; base with a triangular projection directed toward tegulum; a distinct concavity present at about ⅔ of its length; distal portion with dense ridged sculpture.</p><p>Female (paratype, DUIER LP2507; see Figs 9D–E, 10)</p><p>MEASUREMENTS. Total length 23.29; prosoma length 9.71, width 6.98; opisthosoma length 13.58, width 7.65.</p><p>EYES. Eye diameters: AME 0.48, ALE 0.53, PME 0.54, PLE 0.56. Eye interdistances: AME–AME 0.18, AME–ALE 0.06, PME–PME 0.18, PME–PLE 0.11, AME–PME 0.31, ALE–PLE 0.19. Clypeus height at AME 0.82.</p><p>SOMATIC CHARACTERS. Similar to male but generally darker. Radial furrows dark. Muscle sigilla on the ventral side of opisthosoma smaller and less distinct than in male. Other characters as in male.</p><p>EPIGYNE. The epigyne is wider than long. Muscle sigilla and slit sensilla situated outside the epigynal field, separated from each other by a distinct interval; slit sensilla 4–6, positioned at or above the anterior margin of the epigynal field. Median septum elongate-rectangular, flask-shaped in outline; lateral lobes indistinct. Copulatory openings narrow, slit-like. Copulatory ducts with a dilated portion basally, not reflexed posteriorly. Spermathecal heads short, club-shaped, arising from the mesal bases of the spermatheca.</p><p>Distribution</p><p>Luoping County and Qiubei County, Yunnan Province, China.</p></div>	https://treatment.plazi.org/id/2728065299603124C117F9F5E58BD2C3	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.		Plazi	Chen, Run;Yang, Zi-Zhong	Chen, Run, Yang, Zi-Zhong (2026): Four new species of the genus Psechrus Thorell, 1878 (Araneae: Psechridae) from Yunnan Province, China. European Journal of Taxonomy 1081: 1-27, DOI: 10.5852/ejt.2026.1081.3311, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/3311/14557
2728065299673139C10EF9B0E58DD7B2.text	2728065299673139C10EF9B0E58DD7B2.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Psechrus cornutus Chen & Yang 2026	<div><p>Psechrus cornutus sp. nov.</p><p>urn:lsid:zoobank.org:act: B580FF29-BB4B-41E8-A158-15216270E73F</p><p>Figs 1D, 11–14, 19; Table 3</p><p>Diagnosis</p><p>The new species belongs to the sinensis group and most closely resembles P. discoideus Feng et al., 2016 (see Feng et al. 2016: 191–193, figs 9–11) in the morphology of the male palp, and both P. discoideus and P. mingshengi sp. nov. in the female epigyne, but can be distinguished by the following combination of characters: palp with the prolateral surface of the conductor base having comparatively sparse granules (vs densely covered with minute granules in P. discoideus); prolateral extension of the conductor less sclerotized and lacking a disc-shaped dilation (vs more sclerotized and disc-shaped); a distinct concavity present at about ⅓ of the conductor length from the base in retrolateral view (vs absent in P. discoideus); embolus broader, more curved, and horn-shaped in retrolateral view (vs narrower and less curved) (Figs 11A, D, 12C); epigyne with the median septum broadly shield-shaped and wider than long, featuring a large central projection (vs subrectangular with lateral shoulders and a broad, trapezoidal outline, giving a ʻstrongman’s backʼ appearance in P. discoideus; nearly rectangular to subrectangular in P. mingshengi); and spermathecal heads short, arising from the copulatory ducts (vs elongate, arising from the spermathecal bases in the compared species) (Fig. 13B, D).</p><p>Etymology</p><p>The specific epithet is a Latin adjective, ʻ cornutus ʼ (-a, -um), meaning ʻhornedʼ. It refers to the hornlike shape of the embolus. The masculine gender of the adjective agrees with that of the genus Psechrus Thorell, 1878 .</p><p>Type material</p><p>Holotype</p><p>CHINA • ♂; Yunnan Province, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=100.51361&amp;materialsCitation.latitude=24.789444" title="Search Plazi for locations around (long 100.51361/lat 24.789444)">Xi-jing Line</a>, Wuliangshan Town, Nanjian County, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=100.51361&amp;materialsCitation.latitude=24.789444" title="Search Plazi for locations around (long 100.51361/lat 24.789444)">Dali Prefecture</a>; 24°47′22″ N, 100°30′49″ E; 1946.2 m a.s.l.; 11 Mar. 2025; Zi-Zhong Yang, Yu-Lin Zheng, Wen-Hao Yin, Run Chen and Hong-Qiang Dai leg.; collection YNNJ-25-0305; DUIER, NJ2501.</p><p>Paratypes</p><p>CHINA • 5 ♂♂; same data as for holotype; collection YNNJ-25-0305; DUIER NJ2502 – NJ2506 • 5 ♀♀; same data as for holotype; collection YNNJ-25-0305; DUIER NJ2507 – NJ2511 • 1 ♂; Yunnan Province, Duoju Village, Xishelu Township, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=101.06231&amp;materialsCitation.latitude=24.571695" title="Search Plazi for locations around (long 101.06231/lat 24.571695)">Chuxiong City, Chuxiong Prefecture</a>; 24°34′18.1″ N, 101°3′44.3″ E; 2150 m a.s.l.; 29 Oct. 2012; Zi-Zhong Yang and Yu-Jie Yang leg.; DUIER, CX15 .</p><p>Description</p><p>Male (holotype, DUIER NJ2501; see Figs 11–12)</p><p>MEASUREMENTS. Total length 15.33; prosoma length 6.47, width 4.98; opisthosoma length 8.86, width 3.81.</p><p>EYES. Eye diameters: AME 0.41, ALE 0.39, PME 0.40, PLE 0.38. Eye interdistances: AME–AME 0.13, AME–ALE 0.08, PME–PME 0.15, PME–PLE 0.13, AME–PME 0.28, ALE–PLE 0.16. Clypeus height at AME 0.80.</p><p>PROSOMA. Light brown; posterior two-thirds of lateral margins with a black border. Carapace with a grayish-brown median longitudinal stripe. Fovea longitudinal; radial furrows distinct and pale. Sternum suboval, brown, with a conical gray patch medially; surface with sparse black setae. Chelicerae brown; promargin with 3 teeth, retromargin with 4 teeth. Endites and labium dark brownish; margins covered with dense black setae.</p><p>OPISTHOSOMA. Dorsum dark gray; posterior part with five distinct, pale transverse bars. Lateral sides with several irregular longitudinal stripes. Ventral side brown, with a white median stripe; flanked by two rows of distinct, longitudinally arranged muscle sigilla.</p><p>LEGS. Yellowish-brown; annuli indistinct, without spots. Coxa I with short black spines distally, near trochanter (absent in female). Leg formula: 1423. Measurements of palp and legs as shown in Table 3.</p><p>MALE PALP. Palpal tibia short, with an indistinct retrolateral process; ventrodistally with a tuft of long setae on each side. Femur with a broad ventral apophysis. Conductor membranous and semi-transparent, its base with brown tubercles. Embolus brownish, originating from apex of tegulum, margins with faint transverse ridges. Sperm duct running transversely, nearly horizontal across tegulum, turning at about 70° into posterior tegulum distally.</p><p>Female (paratype, DUIER NJ2508; see Figs 13–14)</p><p>MEASUREMENTS. Total length 17.07; prosoma length 7.24, width 5.24; opisthosoma length 9.83, width 6.60.</p><p>EYES. Eye diameters: AME 0.40, ALE 0.42, PME 0.41, PLE 0.42. Eye interdistances: AME–AME 0.14, AME–ALE 0.06, PME–PME 0.14, PME–PLE 0.11, AME–PME 0.27, ALE–PLE 0.17. Clypeus height at AME 0.83.</p><p>SOMATIC CHARACTERS. Median longitudinal stripe on carapace paler, yellowish-brown. Sternum with denser setae than in male. Muscle sigilla on the ventral side of opisthosoma smaller and less distinct than in male. Other characters as in male.</p><p>EPIGYNE. The epigyne is approximately as long as wide. Muscle sigilla and 2–4 slit sense organs situated far from the epigynal field. Median septum distinctly longer than wide, with lateral margins nearly parallel in the anterior half and strongly diverging towards the posterior margin. Lateral lobes indistinct. Copulatory openings distinct and patent, positioned at the anterolateral margins of MS. Copulatory ducts characterized by a distinct reflexed section at their anterior part. Spermatheca subcircular. Spermathecal heads small and knob-like, arising from the mesal base of spermatheca. Fertilization ducts relatively broad, with a width approximately half the diameter of spermatheca, directed postero-laterally.</p><p>Distribution</p><p>Nanjian County and Chuxiong City, Yunnan Province, China.</p></div>	https://treatment.plazi.org/id/2728065299673139C10EF9B0E58DD7B2	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.		Plazi	Chen, Run;Yang, Zi-Zhong	Chen, Run, Yang, Zi-Zhong (2026): Four new species of the genus Psechrus Thorell, 1878 (Araneae: Psechridae) from Yunnan Province, China. European Journal of Taxonomy 1081: 1-27, DOI: 10.5852/ejt.2026.1081.3311, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/3311/14557
27280652997A3132C10CFB61E5D4D6FE.text	27280652997A3132C10CFB61E5D4D6FE.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Psechrus cordatus Chen & Yang 2026	<div><p>Psechrus cordatus sp. nov.</p><p>urn:lsid:zoobank.org:act: 9EF72F5F-C79D-4455-B9E3-655ABE927ECB</p><p>Figs 1A, 15–19; Table 4</p><p>Diagnosis</p><p>The new species belongs to the sinensis group and most closely resembles P. obtectus Bayer, 2012 (see Bayer 2012: 106, fig. 57a–c) in the morphology of the male palp, and both P. tingpingensis Yin, Wang &amp; Zhang, 1985 and P. obtectus (see Bayer 2012: 103–104, 107, figs 55e–f, 56d, f, 58a–g) in the female epigyne, but can be distinguished by the following combination of characters: palp with the embolus base having a quadrate retrolateral projection in ventral view (vs digitiform in P. obtectus) (Figs 15B, D, 16B); a denticulate retrolateral protrusion present posterior to the embolus base (vs absent in P. obtectus) (Figs 15C, E, 16C); conductor with a single, rounded apex (vs two unequal, pointed apices in P. obtectus) (Fig. 15D); epigyne with the muscle sigilla remote from the epigynal field; median septum longer than wide (vs wider than long and posteriorly broadened in both comparison species) (Figs 17A, C, 18A); initial section of the copulatory ducts narrow and tubular, about ½ the duct diameter (vs trumpet-shaped in comparison species); and anterior parts of the copulatory ducts widely separated by about ½ the width of the median septum (vs closely spaced or nearly touching in comparison species) (Figs 17B, D, 18B).</p><p>Etymology</p><p>The specific epithet is a Latin adjective, ʻ cordatus (-a, -um)ʼ, meaning ʻheart-shapedʼ. It refers to the cordate outline of the embolus. The masculine gender of the adjective agrees with that of the genus Psechrus .</p><p>Type material</p><p>Holotype</p><p>CHINA • ♂; Yunnan Province, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=98.48&amp;materialsCitation.latitude=25.014889" title="Search Plazi for locations around (long 98.48/lat 25.014889)">Laifeng Mountain National Forest Park</a>, Tengchong County; 25°00′53.6″ N, 98°28′48.0″ E; 1850 m a.s.l.; 15 May 2004; Zi-Zhong Yang leg.; DUIER, TC01.</p><p>Paratypes</p><p>CHINA • 5 ♀♀; data same as for holotype; DUIER, TC02 to TC06 • 3 ♀♀; Yunnan Province, Ma’anshan Township, Weishan County, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=99.99166&amp;materialsCitation.latitude=25.264166" title="Search Plazi for locations around (long 99.99166/lat 25.264166)">Dali Prefecture</a>; 25°15′51″ N, 99°59′30″ E; 1653.7 m a.s.l.; 11 Mar. 2025; Zi-Zhong Yang, Yu-Lin Zheng, Wen-Hao Yin, Run Chen and Hong-Qiang Dai leg.; collection YNWS-25-0305; DUIER, WS2501 to WS2503 • 1 ♀; Yunnan Province, Longjie Township, Weishan County, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=100.0247&amp;materialsCitation.latitude=25.170694" title="Search Plazi for locations around (long 100.0247/lat 25.170694)">Dali Prefecture</a>; 25°10′14.5″ N, 100°1′28.9″ E; 2100 m a.s.l.; 18 May 2002; Zi-Zhong Yang leg.; DUIER, WBS11 .</p><p>Description</p><p>Male (holotype, DUIER TC01; see Figs 15–16)</p><p>MEASUREMENTS. Total length 16.56; prosoma length 7.25, width 5.52; opisthosoma length 9.31, width 4.66.</p><p>EYES. Eye diameters: AME 0.38, ALE 0.39, PME 0.45, PLE 0.47. Eye interdistances: AME–AME 0.22, AME–ALE 0.06, PME–PME 0.25, PME–PLE 0.31, AME–PME 0.53, ALE–PLE 0.50. Clypeus height at AME 0.78.</p><p>PROSOMA. Yellowish-brown; carapace with a dark brown median longitudinal band; posterior two-thirds of lateral margins with a black border; fovea longitudinal; radial furrows distinct but pale. Chelicerae dark brown, robust; promargin with 3 teeth, retromargin with 4 large teeth and 4 minute denticles. Sternum oval, yellowish-brown, with a dark brown median patch; surface densely covered with black setae. Labium and endites dark brownish, with black setae.</p><p>OPISTHOSOMA. Brown; dorsum scattered with gray spots; lateral sides with several irregular white longitudinal stripes. Ventral side dark brownish, with a slender white median stripe, flanked by two rows of large, distinct, pale, pit-like muscle sigilla.</p><p>LEGS. Dark brownish, without spots or annuli. Leg formula: 1243. Measurements of palp and legs as shown in Table 4.</p><p>MALE PALP. Tibia with a distinct, short, digitiform retrolateral process, apex rounded. Conductor base semi-transparent and membranous, positioned in close proximity to embolus base; distal part of conductor with a reflexed structure, wrapping apex of embolus. Embolus cordiform in overall shape, surface densely covered with striae; embolus base with two projections, one trapezoidal and the other small and conical. Apex of embolus slender and acuminate, enveloped by distal portion of conductor.</p><p>Female (paratype, DUIER TC03; see Figs 17–18)</p><p>MEASUREMENTS. Total length 17.60; prosoma length 6.81, width 4.60; opisthosoma length 10.79, width 7.68.</p><p>EYES. Eye diameters: AME 0.38, ALE 0.41, PME 0.36, PLE 0.41. Eye interdistances: AME–AME 0.20, AME–ALE 0.07, PME–PME 0.23, PME–PLE 0.37, AME–PME 0.54, ALE–PLE 0.40. Clypeus height at AME 0.72.</p><p>SOMATIC CHARACTERS. More robust and generally darker than male. Labium and endites reddish-brown. Muscle sigilla on ventral side of opisthosoma smaller but darker. Other characters as in male.</p><p>EPIGYNE. The epigyne is approximately as long as wide. Muscle sigilla large and irregularly shaped, situated far from the epigynal field, accompanied by three pairs of small, oval slit sense organs. Median septum distinctly longer than wide, with lateral margins nearly parallel in the anterior half and strongly diverging towards the posterior margin. Lateral lobes indistinct. Copulatory openings positioned at the anterolateral margins of the median septum, distinct and patent. Copulatory ducts tubular and relatively narrow, characterized by a distinct reflexed (bent) section at their anterior part. Spermatheca subcircular, situated posteriorly. Spermathecal heads small and knob-like, arising from the mesal base of the spermatheca. Fertilization ducts broad and short, with a width approximately half the diameter of the spermatheca, directed (e.g., postero-laterally).</p><p>Distribution</p><p>Tengchong County and Weishan County, Yunnan Province, China.</p></div>	https://treatment.plazi.org/id/27280652997A3132C10CFB61E5D4D6FE	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.		Plazi	Chen, Run;Yang, Zi-Zhong	Chen, Run, Yang, Zi-Zhong (2026): Four new species of the genus Psechrus Thorell, 1878 (Araneae: Psechridae) from Yunnan Province, China. European Journal of Taxonomy 1081: 1-27, DOI: 10.5852/ejt.2026.1081.3311, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/3311/14557
