Songthela serriformis, Chen & Liu & Li & Xu, 2022

Chen, Zhaoyang, Liu, Fengxiang, Li, Daiqin & Xu, Xin, 2022, Four new species of the primitively segmented spider genus Songthela (Mesothelae, Liphistiidae) from Chongqing Municipality, China, Zootaxa 5091 (4), pp. 546-558 : 553-555

publication ID

https://doi.org/ 10.11646/zootaxa.5091.4.2

publication LSID

lsid:zoobank.org:pub:E4D0CDE9-D9CF-4444-8644-263DC1F9EA88

DOI

https://doi.org/10.5281/zenodo.5863700

persistent identifier

https://treatment.plazi.org/id/7D07C96F-FFFA-FFEB-5080-FAB3FC21FAE9

treatment provided by

Plazi

scientific name

Songthela serriformis
status

sp. nov.

Songthela serriformis sp. nov.

Figure 5 View FIGURE 5

Holotype. Male (XUX-2012-245, matured on 13 June 2013), China, Chongqing Municipality, Nan’an District , Nanshan Botanic Garden , 29.56ºN, 106.62ºE, 554 m a.s.l., 18 November 2012, collected by D Li, FX Liu, X Xu. GoogleMaps

Paratypes. 1 male (XUX-2012-241A, matured on 22 March 2013) and 8 females (XUX-2012-237/238/239/240/2 41/242/243/244), same data as for holotype, 551–554 m a.s.l. GoogleMaps

Diagnosis. Males of S. serriformis sp. nov. can be distinguished from S. pluma , S. tianzhu , S. xiangnan and S. yuping by apical spine of conductor with a spinule basally, conductor forms a lamina with dentate edge proximally ( Fig. 5A, B, E View FIGURE 5 ); from S. jinyun sp. nov., S. longbao sp. nov. and S. wangerbao sp. nov. by conductor with slender apical spine and dentate edge proximally ( Fig. 5A, B, E View FIGURE 5 ); from other Songthela species by conductor with one apical spine and a dentate edge proximally ( Fig. 5A, B, E View FIGURE 5 ). Females of S. serriformis sp. nov. differ from S. tianzhu by middle genital stalks longer and posterior part of genital area wider ( Fig. 5H–M View FIGURE 5 ); from S. yuping by middle receptacular clusters lager than lateral ones and with longer genital stalks ( Fig. 5H–J View FIGURE 5 ); from S. jinyun sp. nov., S. longbao sp. nov., S. wangerbao sp. nov. and other Songthela species by four receptacular clusters situated on dorsal wall of bursa copulatrix, and posterior margin of bursa copulatrix sclerotised ( Fig. 5H–M View FIGURE 5 ).

Description. Male holotype (XUX-2012-245). In alcohol, carapace yellowish-brown covered with a few hairs running over ocular area; opisthosoma brown with 12 dark brown tergites, close to each other, with two pointed hairs on tergites from second to fourth, second to sixth larger than remaining, the fourth largest; sternum narrow, much longer than wide; chelicerae robust with promargin of cheliceral groove with 8 denticles of variable size; legs with hairs/spines; 7 spinnerets. Measurements: BL 15.60, CL 6.95, CW 6.91, OL 8.90, OW 8.00; ALE> PLE> PME> AME; leg I 22.08 (6.11 + 2.80 + 4.55 + 5.82 + 2.80), leg II 22.79 (6.00 + 2.85 + 4.55 + 6.47 +2.92), leg III 24.88 (5.98 + 2.90 + 4.75 + 7.55 + 3.70), leg IV 31.00 (7.28 + 3.22 + 6.12 + 9.88 + 4.50).

Palp: Paracymbium unpigmented and unsclerotized prolaterally, with numerous setae and spines on tip ( Fig. 5A– C View FIGURE 5 ). Contrategulum with a regular denticulate margin ( Fig. 5A, B, D View FIGURE 5 ). Tegulum with a helicoid marginal apophysis and dorsal extension of terminal apophysis, a platelike terminal apophysis retrolaterally ( Fig. 5C, F, G View FIGURE 5 ). Conductor fused with embolus basally, gradually narrowing to a long apical spine with a spinule basally, forming a lamina with a dentate edge proximally ( Fig. 5A, B, E View FIGURE 5 ). Embolus with a transparent, wide and flat opening, a distinct shrink near the opening ventrally, with numerous ribbed ridges retrolaterally ( Fig. 5A, B, D, E View FIGURE 5 ).

Female paratype (XUX-2012-244). In alcohol, carapace dark red-brown covered with a few hairs running over ocular area; opisthosoma light brown with 12 dark brown tergites, close to each other, with two pointed hairs on tergites from second to fourth, second to sixth larger than others, fourth largest; sternum narrow, much longer than wide; chelicerae robust with promargin of cheliceral groove with 12 denticles of variable size; legs with hairs/ spines; 8 spinnerets. Measurements: BL 14.05, CL 7.17, CW 5.91, OL 6.98, OW 5.68; ALE> PLE> PME> AME; palp 11.86 (4.10 + 1.95 + 2.53 + 3.28), leg I 13.49 (4.38 + 2.32 + 2.65 + 2.59 + 1.55), leg II 13.07 (4.27 + 2.22 + 2.47 + 2.53 +1.58), leg III 14.17 (4.05 + 2.33 + 2.51 + 3.31 + 1.97), leg IV 20.66 (5.58 + 2.87 + 3.75 + 5.53 + 2.93).

Female genitalia: Four receptacular clusters situated on dorsal wall of bursa copulatrix. Middle pair with long genital stalks, larger than lateral ones. Lateral pair with obscure genital stalks situated more dorsally, posterior margin of bursa copulatrix sclerotised ( Fig. 5H–M View FIGURE 5 ).

Variation. Males and females vary in body size. The range of measurements in males as follow (N = 2): BL 13.51–15.60, CL 6.27–6.95, CW 6.12–6.91, OL 6.64–8.90, OW 5.60–8.00; females (N = 8): BL 10.19–18.12, CL 5.45–8.88, CW 5.07–7.68, OL 6.07–9.68, OW 4.26–7.05. The number of promargin of cheliceral groove varies from 8 to 12 (N = 10). There are 7 or 8 spinnerets. In addition, the conductor of males shows intraspecific variation: apical spine slightly curved with a spinule basally and forming a smooth lamina with a dentate edge proximally ( Fig. 5A, B View FIGURE 5 ), or apical spine straight without spinule basally, and the formed lamina covered with several teeth ( Fig. 5D, E View FIGURE 5 ). Female genitalia also show intraspecific variation: length of middle genital stalks is different ( Fig. 5H–J View FIGURE 5 ); lateral receptacular clusters are distinctly smaller than middle ones ( Fig. 5I View FIGURE 5 ) compared with the other samples ( Fig. 5H, J View FIGURE 5 ), posterior margin of genital area trapezoid ( Fig. 5K, L View FIGURE 5 ) or W-shaped ( Fig. 5M View FIGURE 5 ).

Etymology. The species epithet is an adjective from the combination of the Latin serri (serrate) and formis (shaped), and refers to the serrated margin of conductor proximally.

Distribution. Chongqing (Nan’an), China.

GenBank accession number. Holotype: XUX-2012-245: OL982297 View Materials .

Kingdom

Animalia

Phylum

Arthropoda

Class

Arachnida

Order

Araneae

Family

Liphistiidae

Genus

Songthela

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