Siamlema changhai Zhao & Li, 2020

Zhao, Huifeng, Li, Shuqiang & Zhang, Aibing, 2020, Taxonomic revision of Telemidae (Arachnida, Araneae) from East and Southeast Asia, ZooKeys 933, pp. 15-93 : 15

publication ID

https://dx.doi.org/10.3897/zookeys.933.38653

publication LSID

lsid:zoobank.org:pub:AE87B5CF-9728-466B-AB05-6BFFFED802D4

persistent identifier

https://treatment.plazi.org/id/38E14102-FE4E-4C61-B436-2936DC5A6D3B

taxon LSID

lsid:zoobank.org:act:38E14102-FE4E-4C61-B436-2936DC5A6D3B

treatment provided by

ZooKeys by Pensoft

scientific name

Siamlema changhai Zhao & Li
status

sp. nov.

Siamlema changhai Zhao & Li sp. nov. Figures 1D View Figure 1 , 20 View Figure 20 , 21 View Figure 21 , 33 View Figure 33

Type material.

Holotype: ♂ (IZCAS), Thailand, Trang Province, Noyong District, Chang Hai Cave, 7.5893N, 99.6688E, elevation ca. 32 m, XI.2015, Z. Chen, G. Zhou, and Q. Zhao leg. Paratypes: 2♂ and 4♀ (IZCAS), same data as holotype.

Other material examined.

1♀ (molecular voucher, IZCAS), same data as holotype.

Etymology.

The species name refers to the type locality; noun in apposition.

Diagnosis.

This species resembles S. suea sp. nov. but can be distinguished by the following: the absence of eyes (Figs 20A View Figure 20 , 21B View Figure 21 ) (vs. presence), the presence of a bulbal apophysis (Fig. 20B-D View Figure 20 ) (vs. absence), the presence of a dorsal spine on the palpal femur distally (arrows on Fig. 20C, D View Figure 20 ) (vs. spine absent), and the absence of a spine on the palpal tibia retrolaterally (Fig. 20D View Figure 20 ) (vs. spine present). Receptacle is tube-shaped (Fig. 21A View Figure 21 ) (vs. globular).

Description.

Male (holotype). Total length 0.92. Carapace 0.41 long, 0.40 wide. Abdomen 0.50 long, 0.44 wide. Carapace brown (Fig. 20A View Figure 20 ). Eyes absent (Fig. 20A View Figure 20 ). Chelicerae, legs, labium, and endites brown. Sternum bright brown. Leg measurements: I 3.28 (0.95, 0.17, 1.00, 0.69, 0.47); II 2.93 (0.86, 0.16, 0.85, 0.63, 0.43); III 2.17 (0.66, 0.14, 0.58, 0.43, 0.36); IV 2.73 (0.86, 0.14, 0.75, 0.56, 0.42). Abdomen brown with a few long setae (Fig. 20A View Figure 20 ).

Palp. Tibia 1.57 times longer than patella, cymbium 1.22 times longer than tibia, femur 1.06 times longer than cymbium (Fig. 20C, D View Figure 20 ); cymbial apophysis present at sub-distal part (Fig. 20C View Figure 20 ), one femoral distal spine (Fig. 20C, D View Figure 20 ), a semi-round extension on patella proximally (Fig. 20D View Figure 20 ); bulb shaped as in Fig. 20C, D View Figure 20 ; bulbal apophysis nearly transparent, with 4 sclerotized teeth (Fig. 20B-D View Figure 20 ); embolus sclerotized, finger shaped (Fig. 20B-D View Figure 20 ).

Female. Total length 1.04. Carapace 0.48 long, 0.41 wide. Abdomen 0.56 long, 0.50 wide. Carapace, sternum, legs milky white (Fig. 21B, C View Figure 21 ). Leg measurements: I 3.31 (1.00, 0.17, 0.99, 0.67, 0.48); II 2.97 (0.90, 0.16, 0.86, 0.60, 0.45); III 2.18 (0.67, 0.14, 0.59, 0.42, 0.36); IV 2.73 (0.86, 0.15, 0.75, 0.56, 0.41). Abdomen dark brown with some long setae (Fig. 21B, C View Figure 21 ). Receptacle tube-shaped, neck two times thinner than distal part (Fig. 21A View Figure 21 ).

Distribution.

Thailand (Trang, site 9 in Fig. 33 View Figure 33 ), known only from the type locality.

Kingdom

Animalia

Phylum

Arthropoda

Order

Araneae

Family

Telemidae

Genus

Siamlema