Cheiracanthium circulum Zhang 2023, sp. nov.
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2023
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| author | Li, Zhaoyi Zhang, Feng |
| author_facet | Li, Zhaoyi Zhang, Feng |
| contents | <p><b><i>Cheiracanthium circulum</i> sp. nov.</b></p><p>urn:lsid:zoobank.org:act: 337E422F-6B3F-459F-BD13-A85167F0F4E7</p><p>Figs 3–4, 11, Table 1</p><p><b>Diagnosis</b></p><p>The male of this new species (Fig. 4C–E) is similar to <i>C. uncinatum</i> Paik, 1985 (Zhang & Zhu 1993: 77, figs 3–6) in having a beak-shaped cymbial spur and a semicircular embolus, but can be distinguished by: (1) the shorter DTA; (2) the thinner median apophysis; (3) the circular tegulum (vs. longitudinally oval in <i>C. uncinatum</i>). The female can be easily distinguished from all other species of <i>Cheiracanthium</i> by the dumbbell-shaped spermathecae and arch-shaped anterior margin (Fig. 4A–B).</p><p><b>Etymology</b></p><p>The specific epithet is an adjective from the Latin ‘ <i>circulus</i> ’, referring to the circular tegulum in ventral view.</p><p><b>Type material</b></p><p><b>Holotype</b> CHINA • ♂; Yunnan Province, Baoshan City, Longling County, Longxin Town, Xiaoheishan Nature Reserve; 16 Feb. 2011; L.Y. Wang leg.; voucher code: ZYL130, Genbank: OQ866250; MHBUARA-1005.</p><p><b>Paratype</b> CHINA • 1 ♀; Yunnan Province, Lushui City, Pianma Town; 9 May. 2004; Z.Z. Yang leg.; voucher code: ZYL122, Genbank: OQ866243; MHBU-ARA-1006.</p><p><b>Description</b></p><p><b>Male</b> (holotype)</p><p>MEASUREMENTS. Total length 6.63. Carapace 3.01 long, 2.31 wide; abdomen 3.62 long, 2.35 wide. Eye sizes and interdistances: AME 0.12, ALE 0.12, PME 0.13, PLE 0.13; AME–AME 0.18, AME–ALE 0.19, PME–PME 0.22, PME–PLE 0.25. MOA 0.47 long, front width 0.43, back width 0.55. Clypeus height 0.07. Sternum 1.45 long, 1.18 wide. Leg measurements: I missing, II 11.09 (2.94, 0.77, 2.96, 3.28, 1.14), III 8.70 (2.22, 0.62, 2.23, 2.65, 0.98), IV 11.29 (2.75, 0.87, 2.88, 3.54, 1.25).</p><p>BODY (FIG. 3A–B). Prosoma with distinct radial striae, cephalic region yellow, thoracic region yellowish brown. All eyes with black rings, AER slightly recurved in frontal view; PER slightly wider than AER, almost straight in dorsal view. Chelicerae yellowish brown, with 3 promarginal and 4 retromarginal teeth. Sternum yellowish brown. Labium and endites colored as sternum. Legs pale yellow, without distinct markings. Leg spines: I missing <b>ẓ</b> II 1p1r-1p1r-0, 1p-1p2v-1r1v, 1v-1p2v-1p2v; III 1p1r-1p1r-0, 1p1r-1r-1d, 1p1r1v-1p1r2v-2p1r1v; IV 1p1r-1p1r-0, 1p1r-1p1r-1v, 1p2r1d1v-1p1r1d1v-2p1r1v. Opisthosoma elongate-oval, dorsally grey, with scattered white small patches and numerous black hairs, narrow longitudinal band in middle, enclosed by light spots, two pairs of muscular impressions; venter greyish, with sparse white spots. Spinneret coniform, ALS larger and closed each other; PMS smallest; and PLS with two segments, length of distal segment nearly length of base segment.</p><p>PALP (Fig. 4C–E). Tibia long, ca ⅔ of cymbium’s length; RTA short, ca ¼ of tibia’s length, with wider base and hook-shaped tip, and pointed dorsally from ventral view; DTA slightly shorter than RTA, thin and rodlike; cymbium almost 2 × as long as wide; tip of cymbium long, ca ⅓ of cymbium’s length; cymbium retrolateral margin with shallow dent, cymbial furrow short and shallow; cymbial spur slightly longer than RTA; tegulum circular; median apophysis long, ca ½ of tegulum’s length, with wider base and hook-shaped apex in ventral view; embolus originating on retrolateral flank, at about 3 o’clock position, extending clockwise along tegular margin, tip covered by conductor; conductor membranous, with broad apex; sperm duct indistinct.</p><p><b>Female</b> (paratype)</p><p>MEASUREMENTS. Total length 6.96. Carapace 2.98 long, 2.35 wide; abdomen 3.98 long, 2.60 wide. Eye sizes and interdistances: AME 0.15, ALE 0.16, PME 0.14, PLE 0.15; AME–AME 0.23, AME–ALE 0.28, PME–PME 0.32, PME–PLE 0.36. MOA 0.47 long, front width 0.49, back width 0.60. Clypeus height 0.04. Sternum 1.47 long, 1.33 wide. Leg measurements: I 13.03 (3.54, 1.14, 3.49, 3.66, 1.20), II 9.91 (2.76, 0.93, 2.40, 2.75, 1.07), III 7.44 (2.21, 0.64, 1.49, 2.13, 0.97), IV 10.55 (2.96, 0.89, 2.64, 3.00, 1.06).</p><p>BODY (Fig. 3C–D). Prosoma reddish brown, thoracic region darker than other parts except the eye area. Chelicerae with 3 promarginal and 5 retromarginal teeth. Sternum, labium and endites colored as carapace. Legs pale yellow. Leg spines: I 0-0-0, 0-0-0, 1v-0-2v; II 1p1r-1p-0, 1p-1v-1v, 1v-2v-2v; III 1p1r-1p-0, 1r-1r-1d, 1p1r2v-1v-2v; IV 1r-1p-0, 1r-1p-1v, 1p1r2v-2v-1v. Opisthosoma greyish brown, with scattered white spots and two pairs of muscular impressions.</p><p>EPIGYNE (Fig. 4A–B). Atrium heavily sclerotized, located at posterior portion of epigynal plate, with arch-shaped anterior margin and crescent-shaped lateral margins; two copulatory openings located at postero-lateral margins of atrium; part of dark copulatory duct and spermathecae visible through tegument of epigynal plate in ventral view; spermathecae dumbbell-shaped, connected with simple copulatory duct, copulatory ducts ascend, then fold backwards and lastly descend to spermathecae.</p><p><b>Distribution</b></p><p>China, Yunnan (localities in Fig. 11).</p> |
| format | Recurso digital |
| id | zenodo_https___doi_org_10_5281_zenodo_10095788 |
| institution | Zenodo |
| language | |
| publishDate | 2023 |
| publisher | Zenodo |
| record_format | zenodo |
| spellingShingle | Cheiracanthium circulum Zhang 2023, sp. nov. Li, Zhaoyi Zhang, Feng Biodiversity Taxonomy Animalia Arthropoda Arachnida Araneae Cheiracanthiidae Cheiracanthium Cheiracanthium circulum <p><b><i>Cheiracanthium circulum</i> sp. nov.</b></p><p>urn:lsid:zoobank.org:act: 337E422F-6B3F-459F-BD13-A85167F0F4E7</p><p>Figs 3–4, 11, Table 1</p><p><b>Diagnosis</b></p><p>The male of this new species (Fig. 4C–E) is similar to <i>C. uncinatum</i> Paik, 1985 (Zhang & Zhu 1993: 77, figs 3–6) in having a beak-shaped cymbial spur and a semicircular embolus, but can be distinguished by: (1) the shorter DTA; (2) the thinner median apophysis; (3) the circular tegulum (vs. longitudinally oval in <i>C. uncinatum</i>). The female can be easily distinguished from all other species of <i>Cheiracanthium</i> by the dumbbell-shaped spermathecae and arch-shaped anterior margin (Fig. 4A–B).</p><p><b>Etymology</b></p><p>The specific epithet is an adjective from the Latin ‘ <i>circulus</i> ’, referring to the circular tegulum in ventral view.</p><p><b>Type material</b></p><p><b>Holotype</b> CHINA • ♂; Yunnan Province, Baoshan City, Longling County, Longxin Town, Xiaoheishan Nature Reserve; 16 Feb. 2011; L.Y. Wang leg.; voucher code: ZYL130, Genbank: OQ866250; MHBUARA-1005.</p><p><b>Paratype</b> CHINA • 1 ♀; Yunnan Province, Lushui City, Pianma Town; 9 May. 2004; Z.Z. Yang leg.; voucher code: ZYL122, Genbank: OQ866243; MHBU-ARA-1006.</p><p><b>Description</b></p><p><b>Male</b> (holotype)</p><p>MEASUREMENTS. Total length 6.63. Carapace 3.01 long, 2.31 wide; abdomen 3.62 long, 2.35 wide. Eye sizes and interdistances: AME 0.12, ALE 0.12, PME 0.13, PLE 0.13; AME–AME 0.18, AME–ALE 0.19, PME–PME 0.22, PME–PLE 0.25. MOA 0.47 long, front width 0.43, back width 0.55. Clypeus height 0.07. Sternum 1.45 long, 1.18 wide. Leg measurements: I missing, II 11.09 (2.94, 0.77, 2.96, 3.28, 1.14), III 8.70 (2.22, 0.62, 2.23, 2.65, 0.98), IV 11.29 (2.75, 0.87, 2.88, 3.54, 1.25).</p><p>BODY (FIG. 3A–B). Prosoma with distinct radial striae, cephalic region yellow, thoracic region yellowish brown. All eyes with black rings, AER slightly recurved in frontal view; PER slightly wider than AER, almost straight in dorsal view. Chelicerae yellowish brown, with 3 promarginal and 4 retromarginal teeth. Sternum yellowish brown. Labium and endites colored as sternum. Legs pale yellow, without distinct markings. Leg spines: I missing <b>ẓ</b> II 1p1r-1p1r-0, 1p-1p2v-1r1v, 1v-1p2v-1p2v; III 1p1r-1p1r-0, 1p1r-1r-1d, 1p1r1v-1p1r2v-2p1r1v; IV 1p1r-1p1r-0, 1p1r-1p1r-1v, 1p2r1d1v-1p1r1d1v-2p1r1v. Opisthosoma elongate-oval, dorsally grey, with scattered white small patches and numerous black hairs, narrow longitudinal band in middle, enclosed by light spots, two pairs of muscular impressions; venter greyish, with sparse white spots. Spinneret coniform, ALS larger and closed each other; PMS smallest; and PLS with two segments, length of distal segment nearly length of base segment.</p><p>PALP (Fig. 4C–E). Tibia long, ca ⅔ of cymbium’s length; RTA short, ca ¼ of tibia’s length, with wider base and hook-shaped tip, and pointed dorsally from ventral view; DTA slightly shorter than RTA, thin and rodlike; cymbium almost 2 × as long as wide; tip of cymbium long, ca ⅓ of cymbium’s length; cymbium retrolateral margin with shallow dent, cymbial furrow short and shallow; cymbial spur slightly longer than RTA; tegulum circular; median apophysis long, ca ½ of tegulum’s length, with wider base and hook-shaped apex in ventral view; embolus originating on retrolateral flank, at about 3 o’clock position, extending clockwise along tegular margin, tip covered by conductor; conductor membranous, with broad apex; sperm duct indistinct.</p><p><b>Female</b> (paratype)</p><p>MEASUREMENTS. Total length 6.96. Carapace 2.98 long, 2.35 wide; abdomen 3.98 long, 2.60 wide. Eye sizes and interdistances: AME 0.15, ALE 0.16, PME 0.14, PLE 0.15; AME–AME 0.23, AME–ALE 0.28, PME–PME 0.32, PME–PLE 0.36. MOA 0.47 long, front width 0.49, back width 0.60. Clypeus height 0.04. Sternum 1.47 long, 1.33 wide. Leg measurements: I 13.03 (3.54, 1.14, 3.49, 3.66, 1.20), II 9.91 (2.76, 0.93, 2.40, 2.75, 1.07), III 7.44 (2.21, 0.64, 1.49, 2.13, 0.97), IV 10.55 (2.96, 0.89, 2.64, 3.00, 1.06).</p><p>BODY (Fig. 3C–D). Prosoma reddish brown, thoracic region darker than other parts except the eye area. Chelicerae with 3 promarginal and 5 retromarginal teeth. Sternum, labium and endites colored as carapace. Legs pale yellow. Leg spines: I 0-0-0, 0-0-0, 1v-0-2v; II 1p1r-1p-0, 1p-1v-1v, 1v-2v-2v; III 1p1r-1p-0, 1r-1r-1d, 1p1r2v-1v-2v; IV 1r-1p-0, 1r-1p-1v, 1p1r2v-2v-1v. Opisthosoma greyish brown, with scattered white spots and two pairs of muscular impressions.</p><p>EPIGYNE (Fig. 4A–B). Atrium heavily sclerotized, located at posterior portion of epigynal plate, with arch-shaped anterior margin and crescent-shaped lateral margins; two copulatory openings located at postero-lateral margins of atrium; part of dark copulatory duct and spermathecae visible through tegument of epigynal plate in ventral view; spermathecae dumbbell-shaped, connected with simple copulatory duct, copulatory ducts ascend, then fold backwards and lastly descend to spermathecae.</p><p><b>Distribution</b></p><p>China, Yunnan (localities in Fig. 11).</p> |
| title | Cheiracanthium circulum Zhang 2023, sp. nov. |
| topic | Biodiversity Taxonomy Animalia Arthropoda Arachnida Araneae Cheiracanthiidae Cheiracanthium Cheiracanthium circulum |
| url | https://doi.org/10.5281/zenodo.10095788 |