Mekonglema yan Zhao & Li, 2020
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publication ID |
https://dx.doi.org/10.3897/zookeys.933.38653 |
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publication LSID |
lsid:zoobank.org:pub:AE87B5CF-9728-466B-AB05-6BFFFED802D4 |
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persistent identifier |
https://treatment.plazi.org/id/B8F48215-808E-47D3-956F-EFD83BE32B58 |
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taxon LSID |
lsid:zoobank.org:act:B8F48215-808E-47D3-956F-EFD83BE32B58 |
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treatment provided by |
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scientific name |
Mekonglema yan Zhao & Li |
| status |
sp. nov. |
Mekonglema yan Zhao & Li sp. nov. Figures 18 View Figure 18 , 19 View Figure 19 , 33 View Figure 33
Type material.
Holotype: ♂ (IZCAS), China, Yunnan Province, Baoshan Prefecture, Tengchong County, Diantan Town, Lianzu Village, Yan Cave, 25.5501N, 98.4452E, elevation ca. 1867 m, 27.XI.2013, Y. Li and J. Liu leg. Paratypes: 2♂ and 4♀ (IZCAS), same data as holotype.
Etymology.
The species refers to the type locality; noun in apposition.
Diagnosis.
Mekonglema yan sp. nov. resembles M. bailang sp. nov. but can be distinguished by the following characters: an abdominal scuta is absent in the male (vs. present); the tip of the embolus is unsclerotized (Fig. 18B-D View Figure 18 ) (vs. sclerotized), the bulbal length/width ratio is approximately 1.7 (Fig. 18C, D View Figure 18 ) (vs. 1.2); the receptacle is long and U-shaped (Fig. 19A View Figure 19 ) (vs. short and nearly straight).
Description.
Male (holotype). Total length 1.48. Carapace 0.69 long, 0.57 wide. Abdomen 0.77 long, 0.63 wide. Carapace brown (Fig. 18A View Figure 18 ). Four vestigial eyes (Fig. 18A View Figure 18 ). Chelicerae, labium, and endites brown, legs yellow. Sternum bright brown with sparse setae. Leg measurements: I 4.86 (1.44, 0.23, 1.52, 1.00, 0.67); II 4.33 (1.34, 0.23, 1.25, 0.91, 0.60); III 3.20 (1.00, 0.21, 0.88, 0.61, 0.50); IV 4.04 (1.25, 0.20, 1.16, 0.87, 0.56). Abdomen light brown (Fig. 18A View Figure 18 ).
Palp: Tibia 2.05 times longer than patella, cymbium 1.73 times longer than tibia, length of cymbial apophysis as wide as cymbial base (Fig. 18C View Figure 18 ); bulb shaped as in Fig. 18C, D View Figure 18 ; bulbal apophysis sclerotized and looped about 270° (Fig. 18B-D View Figure 18 ); embolus membranous and finger-like (Fig. 18C, D View Figure 18 ).
Female: Total length 1.70. Carapace 0.71 long, 0.61 wide. Abdomen 0.97 long, 0.90 wide. Coloration lighter than in male (Fig. 19B, C View Figure 19 ). Leg measurements: I 4.72 (1.44, 0.23, 1.45, 0.95, 0.65); II 4.24 (1.30, 0.23, 1.25, 0.85, 0.61); III 3.49 (1.33, 0.20, 0.89, 0.59, 0.48); IV 4.05 (1.25, 0.20, 1.19, 0.85, 0.56). Abdomen grey. Receptacle membranous, U-shaped, neck as wide as distal part (Fig. 19A View Figure 19 ).
Distribution.
China (Yunnan, Baoshan, site 6 in Fig. 33 View Figure 33 ), known only from the type locality.
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.