Utivarachna zhengguoi Chu & Li, 2023
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publication ID |
https://dx.doi.org/10.3897/zookeys.1181.110628 |
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publication LSID |
lsid:zoobank.org:pub:AB0B755A-C530-46CD-87F2-77599B974343 |
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persistent identifier |
https://treatment.plazi.org/id/10E3A567-A9C3-4A37-A1CC-13063399D495 |
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taxon LSID |
lsid:zoobank.org:act:10E3A567-A9C3-4A37-A1CC-13063399D495 |
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treatment provided by |
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scientific name |
Utivarachna zhengguoi Chu & Li |
| status |
sp. nov. |
Utivarachna zhengguoi Chu & Li sp. nov.
Figs 7 View Figure 7 , 8 View Figure 8 , 9 View Figure 9
Type materials.
Holotype ♂ (IZCAS-Ar44634): China: Yunnan Province: Menglun Nature Reserve, secondary tropical seasonal moist forest (21.9164°N, 101.2830°E, 641-671 m a.s.l.), hand caught in leaf litter, 5-12.III.2007, leg. Guo Zheng. Paratypes: 1♂ (IZCAS-Ar44635) and 2♀ (IZCAS-Ar44636, 44637), same data as holotype.
Etymology.
The specific name is dedicated to Mr Guo Zheng, the collector of this species; noun (name) in genitive case.
Diagnosis.
Males resembles U. fabaria , U. lata , U. rama Chami-Kranon & Likhitrakarn, 2007, U. subfabaria Liu, Xu & Haddad, 2020, and U. linyejiei sp. nov. (cf. Figs 7 View Figure 7 , 9A, B View Figure 9 and Jin et al. 2015: 573, figs 4A, C, D, 5A-D, 6C-E; Jin et al. 2015: 570, figs 1A, C, D, 2A-D, 3D-F; Chami-Kranon et al. 2007: 60, figs 1,4, 10-13, 14-17; Liu et al. 2020: 90, figs 1-3, 6A-D; Figs 1 View Figure 1 , 3A, B View Figure 3 ) by having similar long RTA, wide at the base, narrow at the end, and having a hook-shaped tip pointing anteriorly (Fig. 7B, C View Figure 7 ), but males of this species can be distinguished by the elliptical bulb, embolus (E) slightly shorter than widest part of bulb (Fig. 7B View Figure 7 ; vs bulb droplet-shaped, anterior part about half of posterior part, embolus about half of widest of bulb in U. fabaria ; bulb almost square, embolus about as wide as widest of bulb in U. lata ; bulb elliptical, embolus obviously shorter than widest of bulb in U. rama , U. subfabaria and U. linyejiei sp. nov.), by the subtegulum (ST) occupying approximately one-third of tegulum width, 3/5 of tegulum length in ventral view (Fig. 7B View Figure 7 ; vs 1/4 of tegulum width, 5/6 of tegulum length in U. fabaria ; 1/4 of tegulum width, 4/5 of tegulum length in U. rama ; 1/5 of tegulum width, 5/6 of tegulum length in U. subfabaria ; 1/5 of tegulum width, 4/7 of tegulum length in U. linyejiei sp. nov.), and by the sperm duct (SD) extending to the base of tegulum (Fig. 7B View Figure 7 ; vs sperm duct separated from the base of tegulum by nearly three times the width of the sperm duct in U. fabaria and U. rama ). Females resemble U. arcuata Zhao & Peng, 2014 (cf. Figs 8 View Figure 8 , 9C, D View Figure 9 and Zhao and Peng 2014: 579, figs 3, 4) in having similarly large copulatory openings (CO) (Fig. 8A View Figure 8 ) and an atrium (A) occupying about 5/6 of the length of the epigyne (Fig. 8A View Figure 8 ), but they can be distinguished by their approximately straight copulatory openings (Fig. 8A View Figure 8 ; vs copulatory openings strongly curved, arch-shaped in U. arcuata ), by the copulatory ducts (CD) with two or three sharp twists (Fig. 8B View Figure 8 ; vs one or two twists in U. arcuata ), by the bean-shaped bursae (B) (Fig. 8B View Figure 8 ; vs S-shaped bursae, anterior part strongly restricted and curved in U. arcuata ), and by the spermathecae (SP), which are separated by about half of their diameter (Fig. 8B View Figure 8 ; vs spermathecae separated by less than half of their diameter in U. arcuata ).
Description.
Male. Habitus (Fig. 9A, B View Figure 9 ). Total length 4.68. Carapace (Fig. 9A View Figure 9 ): length 2.54, width 1.84, dark reddish brown; cervical groove, radial grooves and fovea indistinct; fovea short and dark. Eyes (Fig. 9A View Figure 9 ): AER procurved, PER recurved in dorsal view, PER wider than AER. Eye sizes and interdistances: AME 0.10, ALE 0.11, PME 0.10, PLE 0.11; AME-AME 0.10, AME-ALE 0.15, PME-PME 0.21, PME-PLE 0.31; MOA 0.31 long, anterior width 0.28, posterior width 0.42. Mouthparts (Fig. 9B View Figure 9 ): chelicerae dark reddish brown, with three promarginal (middle largest) and four retromarginal (proximal largest, distal smallest) teeth; endites depressed posteriorly, slightly convergent anteriorly, with dense setae on inner margin; labium nearly trapezoidal, length 0.50, width 0.41. Sternum (Fig. 9B View Figure 9 ) length 1.27, width 0.98, reddish brown with dark, reddish-brown edges, with precoxal triangles and intercoxal extensions, posterior region protruding strongly between coxae IV. Pedicel cylindrical, sclerotized, relatively short, reddish brown. Abdomen (Fig. 9A, B View Figure 9 ) yellow, 2.14 long, 1.57 wide, dorsum with scutum covering entire dorsal surface, with four central, indistinct, reddish-brown spots; venter with brown stripes. Spinnerets surrounded by brown rings. Legs: deep reddish brown, anterior legs distinctly thicker than posterior legs. Leg measurements: I 5.36 (1.52, 0.76, 1.24, 1.09, 0.75); II 4.99 (1.45, 0.69, 1.10, 1.08, 0.67); III 3.86 (1.15, 0.59, 0.67, 1.00, 0.45); IV 5.27 (1.43, 0.66, 1.14, 1.45, 0.59).
Palp (Fig. 7A-C View Figure 7 ): tibia shorter than half of cymbium length; RTA about 1.06 times longer than tibia, with wide base and narrow, blunt tip, straight section subdistally to distally, slightly curvature distally. Bulb elliptical, wider in middle part; tegulum approximately 1.34 times as long as its maximum width in ventral view; subtegulum (ST) sclerotized, occupying approximately 1/3 of tegulum width in ventral view; sperm duct (SD) distinct, U-shaped in ventral view, extending to the base of tegulum. Embolus (E) long, anticlockwise, obliquely coiled twice, coils as wide as tegulum; basal portion of embolus lamellar, wide, arising at 12:00-12:30 o’clock from bulb; terminal portion of embolus filiform, resting in distal cymbial alveolus.
Female. Habitus (Fig. 9C, D View Figure 9 ). As in male except as noted. Total length 4.18. Carapace length 2.03, width 1.54, deep reddish brown, with lighter area at middle. Eye (Fig. 9C View Figure 9 ) sizes and interdistances: AME 0.09, ALE 0.11, PME 0.10, PLE 0.11; AME-AME 0.07, AME-ALE 0.10, PME-PME 0.17, PME-PLE 0.23; MOA 0.26 long, anterior width 0.25, posterior width 0.37. Mouthparts (Fig. 9D View Figure 9 ): chelicerae with three promarginal (middle largest) and four retromarginal (proximal largest, distal smallest) teeth. Sternum (Fig. 9D View Figure 9 ) length 1.06, width 0.85. Abdomen (Fig. 9C, D View Figure 9 ): length 2.15, width 1.63, dorsum with brown stripes and four distinct, reddish-brown spots centrally; venter with two lines of spots. Leg measurements: I 4.43 (1.25, 0.63, 1.02, 0.90, 0.63); II 4.07 (1.18, 0.60, 0.86, 0.88, 0.55); III 3.26 (0.96, 0.48, 0.63, 0.81, 0.38); IV 4.43 (1.18, 0.54, 1.00, 1.20, 0.51).
Epigyne (Fig. 8A, B View Figure 8 ): epigynal plate longer than wide, spermathecae (SP) and bursae (B) distinct in ventral view. Atrium (A) large and nearly trapezoidal, occupying about 5/6 length of epigyne, posterior margin wider than anterior margin. Copulatory openings (CO) large, semicircular, located at anteriorly, separated by about their diameter. Copulatory ducts (CD) long, anterior part wide and posterior part narrow; copulatory ducts convoluted posteriorly, with two or three sharp twists. Connecting ducts (CnD) thinner than copulatory ducts, located on the lateral areas of copulatory openings, separated by more than spermathecae diameter. Bursae elliptical, separated by about 1.5 times their diameter; bursae with several small clusters of glandular particles (GP) on posterior surface, occupying about 1/5 of bursa diameter. Spermathecae globular, separated by less than their diameter. Fertilization ducts (FD) laminar, separated from each other by posterior width of atrium.
Distribution.
China (Yunnan, type locality; Fig. 10 View Figure 10 ).
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.