Trilacuna zayu Tong & Li, 2025
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publication ID |
https://doi.org/10.3897/zookeys.1229.145844 |
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publication LSID |
lsid:zoobank.org:pub:FF1C850A-247F-4935-B511-B426C7100E4A |
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DOI |
https://doi.org/10.5281/zenodo.14946345 |
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persistent identifier |
https://treatment.plazi.org/id/637D98E6-02BC-57CC-952D-C91AEBCD039E |
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treatment provided by |
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scientific name |
Trilacuna zayu Tong & Li |
| status |
sp. nov. |
Trilacuna zayu Tong & Li sp. nov.
Figs 5 K View Figure 5 , 11 View Figure 11 , 12 View Figure 12 , 13 View Figure 13 , 14 G, H View Figure 14
Material examined.
Holotype China • ♂ ( SYNU -908 ); Xizang, Nyingchi City, Zayu Co., Gaba Oil Field ; 28°38.849'N, 97°27.088'E, 2300 m elev.; 25. VII. 2013; Q. Cao leg. GoogleMaps Paratypes. China • 1 ♂ ( SYNU -F-928 ); same data as holotype GoogleMaps • 2 ♀ ( SYNU -909–910 ); Zayu Co., Dongriqugou ; 28°39.670'N, 97°28.657'E, 2470 m elev.; 23. VII. 2013; L. Lin leg. GoogleMaps
Other material.
China • 1 ♂ ( SYNU -F-929 ); Zayu Co., Dongriqugou ; 28°39.670'N, 97°28.657'E, 2470 m elev.; 23. VII. 2013; Q. Cao leg. GoogleMaps • 2 ♀ ( SYNU -F-931–932 ); same data as above GoogleMaps • 1 ♀ ( SYNU -F-930 ); Zayu Co., Gaba Vill. ; 28°40.254'N, 97°27.780'E, 2460 m elev.; 24. VII. 2013; L. Lin leg. GoogleMaps
Etymology.
The specific name is a noun in apposition taken from the type locality.
Diagnosis.
The new species is similar to T. longling Tong, Zhang & Li, 2019 in the ridges on posterior part of the male sternum, the small slit of the male epigastric region and the T-shaped sclerite of the endogyne, but can be distinguished by the elongated male palpal femur (Fig. 12 D View Figure 12 ) vs. globular ( Tong et al. 2019: fig. 13 A), the cluster of bristle-like structures (cbs) on the median area of the bulb (Figs 12 A, J View Figure 12 ) vs. lacking ( Tong et al. 2019: fig. 13 A), the long, belt-like structure (bls) of the psembolus (Fig. 12 I View Figure 12 ) vs. many fiber-like lobes ( Tong et al. 2019: fig. 13 B), and the transversally elongated membranous structure (tms) of the endogyne (Fig. 14 H View Figure 14 ) vs. lacking ( Tong et al. 2019: fig. 24 J).
Description.
Male. Body: yellowish-brown, legs lighter; habitus as in Fig. 11 A, C, E View Figure 11 ; body length 1.64. Carapace (Fig. 11 B, F View Figure 11 ): 0.72 long, 0.58 wide; sides granulate. Eyes (Fig. 11 B, F View Figure 11 ): eyes well developed, nearly equal in size; ALE separated from edge of carapace by 1.4 diameters. Mouthparts (Figs 5 K View Figure 5 , 11 D, H View Figure 11 ): endites distally branched. Sternum (Fig. 11 D View Figure 11 ): surface smooth; with several rows of ridges in posterior part. Abdomen (Fig. 11 A, C, E, G View Figure 11 ): 0.84 long, 0.49 wide; surface smooth; sperm pore situated at level of anterior spiracles; with small slit anterior of groove connecting posterior spiracles. Palp (Fig. 12 A – K View Figure 12 ): orange; 0.54 long (0.17, 0.10, 0.09, 0.16); femur elongated (width / length = 0.52); bulb triangle, with cluster of bristle-like structure (cbs) on median area; psembolus with long, belt-like structure (bls), a lateral curved branch (lb) and broad median branch (mb).
Female. Same as male except as noted. Body: length 1.89; habitus as in Fig. 13 A, C, E View Figure 13 . Carapace: 0.77 long, 0.63 wide. Abdomen: 1.06 long, 0.67 wide. Epigastric area (Figs 13 A View Figure 13 , 14 G View Figure 14 ): with recurved, strongly sclerotized arches (sar). Endogyne (Fig. 14 H View Figure 14 ): with narrow, transverse sclerite (tsc) and broad, transversally elongated membranous structure (tms); with anterior slender sclerite (as) and posterior small globular structure (glo); transverse bars (tba) with pair of short lateral apodemes (ap).
Distribution.
Known only from the type locality (Fig. 1 View Figure 1 ).
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.