Glenognatha tangi ( Zhu, Song & Zhang, 2003 ),

Jimmy Cabra-García & Antonio D. Brescovit, 2016, Revision and phylogenetic analysis of the orb-weaving spider genus Glenognatha Simon, 1887 (Araneae, Tetragnathidae), Zootaxa 4069 (1), pp. 1-183: 39-45

publication ID

http://doi.org/10.11646/zootaxa.4069.1.1

publication LSID

lsid:zoobank.org:pub:52FC658C-78C7-49FC-9961-8AC43CA03101

persistent identifier

http://treatment.plazi.org/id/8E0E8F67-7D34-FFA4-ACBA-0EC9FECBD25E

treatment provided by

Plazi

scientific name

Glenognatha tangi ( Zhu, Song & Zhang, 2003 )
status

new combination

Glenognatha tangi ( Zhu, Song & Zhang, 2003)  new combination

( Figs. 25–30View FIGURE 25View FIGURE 26View FIGURE 27View FIGURE 28View FIGURE 29View FIGURE 30, 131View FIGURE 131)

Dyschiriognatha tangi Zhu, et al. 2003  : 207, figs. 113 A –G, 114 A –F ( female holotype from Yongning county, Guangxi province, China, 22º42´N, 108º24´E, 6.xii.1982, Zhang Yongquiang leg., deposited in HU, not examinedGoogleMaps  ; Paratypes: 1♂ from Jinghong county , Yunnan province, China, 22º00´N, 100º48´E, 10.vii.1983, Zhu Chuandian leg., deposited in HU, not examinedGoogleMaps  , 5♀ 1♂ paratypes from Nanning city, Guangxi province , China, 22º48´N, 108º18´E, 11.xii.1986 Zhang Yongquiang leg., deposited in HU, 1♂ and 1♀ examinedGoogleMaps  ); World Spider Catalog 2015.

Transfer justification. Study of the D. tangi  male paratype and other specimens from Myanmar shows that this species has all the synapomorphies of the genus Glenognatha  . The conductor ( Figs. 27B –CView FIGURE 27, 28H –IView FIGURE 28), the embolus ( Fig. 27DView FIGURE 27, 28HView FIGURE 28), the paracymbium ( Fig. 28GView FIGURE 28) and the female genitalia ( Fig. 28A –CView FIGURE 28) exhibit the typical Glenognatha  morphology.

Diagnosis. Males and females of G. tangi  resemble those of G. dentata  and G. argyrostilba  by the presence of pore-bearing and setae-bearing depressions on the lateral surface of the carapace ( Figs. 29 A, E –FView FIGURE 29). Males can be distinguished from the former by the absence of tooth-like projections on the conductor lamina ( Fig. 28HView FIGURE 28) and from the latter by the shape of the conductor lamina which is not sinuous in ventral view ( Fig. 28HView FIGURE 28). Females can be distinguished from both species by the smooth sternum ( Fig. 25GView FIGURE 25) and the absence of setae-bearing tubercles on the antero-ectal surface of the chelicerae ( Figs. 26D –FView FIGURE 26).

Description. Male and female described by Zhu et al. (2003). Additional data.

Male ( Myanmar, USNM). Habitus as in Figures 25 A –DView FIGURE 25. Cephalothorax with pore-bearing and setae-bearing depressions ( Figs. 29 A, E –FView FIGURE 29). Cephalothorax 0.70 high. Abdomen 1.05 high. Sternum 0.45 long, 0.50 wide, smooth ( Fig. 29DView FIGURE 29). Chelicerae as in Figures 26 A –CView FIGURE 26. Cheliceral fang outgrowth well-developed ( Fig. 26 AView FIGURE 26). Epiandrous fusules as in Figure 30CView FIGURE 30. Spinnerets as in Figures 30D –FView FIGURE 30. Palp as in Figure 27View FIGURE 27.

Female ( Myanmar, USNM). Habitus as in Figures 25E –HView FIGURE 25. Cephalothorax with pore-bearing and setae-bearing depressions. Cephalothorax 0.75 high. Abdomen 1.47 high. Sternum 0.50 long, 0.50 wide, smooth ( Fig. 25GView FIGURE 25). Chelicerae as in Figures 26D –FView FIGURE 26. Genitalia with well-developed spermathecae ( Figs. 28 A –CView FIGURE 28). UE entire ( Figs. 28 A –BView FIGURE 28).

Variation. Male total length 1.9–2.2 (N = 4; average 2.1), cephalothorax length 0.8–1.1 (N = 4; average 0.9), femur I length 0.9–1.2 (N = 4; average 1.1).

Distribution. Known from Guangxi and Yunnan provinces in China and Sagaing region in Myanmar ( Fig. 131View FIGURE 131).

Remarks. The examined female paratype of D. tangi  is a specimen of G. dentata  . Due to the impossibility to obtain additional loan of type series females of D. tangi  , the identification of the female of this species was based on the original description ( Zhu et al. 2003) and a female specimen from Myanmar which has a very similar habitus to G. tangi  males stored in the same vial ( Figs. 25E –HView FIGURE 25). The characters used in the key of Zhu et al. (2003) to distinguish females of G. tangi  from G. dentata  (e.g. carapace color, gonopore width and spermathecae shape oval or spherical) can be variable due to intraspecific variation or conservation artifacts. Accordingly, we propose new characters to diagnose G. tangi  females.

Additional material examined (N= 5). New records. MYANMAR: Sagaing: Chattin Wildlife Sanct. Takontaing, 23º37´20´´N, 95º31´52´´E, elev. [179m], 7–12.x1998, J. Coddington & R. Baptista leg., 1♀ 3♂ 1 immature ( USNM).GoogleMaps 

USNM

Smithsonian Institution, National Museum of Natural History

Kingdom

Animalia

Phylum

Arthropoda

Class

Arachnida

Order

Araneae

Family

Tetragnathidae

Genus

Glenognatha

Loc

Glenognatha tangi ( Zhu, Song & Zhang, 2003 )

Jimmy Cabra-García & Antonio D. Brescovit 2016
2016
Loc

Dyschiriognatha tangi

Zhu 2003
2003
Loc

Glenognatha

Simon 1887
1887
Loc

Glenognatha

Simon 1887
1887