Glenognatha tangi ( Zhu, Song & Zhang, 2003 ) Jimmy Cabra-García & Antonio D. Brescovit, 2016

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

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

publication LSID

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

DOI

https://doi.org/10.5281/zenodo.5666932

persistent identifier

https://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. 25–30 View FIGURE 25 View FIGURE 26 View FIGURE 27 View FIGURE 28 View FIGURE 29 View FIGURE 30 , 131 View 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 examined GoogleMaps   ; Paratypes: 1♂ from Jinghong county , Yunnan province, China, 22º00´N, 100º48´E, 10.vii.1983, Zhu Chuandian leg., deposited in HU, not examined GoogleMaps   , 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♀ examined GoogleMaps   ); 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–C View FIGURE 27 , 28H–I View FIGURE 28 ), the embolus ( Fig. 27D View FIGURE 27 , 28H View FIGURE 28 ), the paracymbium ( Fig. 28G View FIGURE 28 ) and the female genitalia ( Fig. 28A–C View 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–F View FIGURE 29 ). Males can be distinguished from the former by the absence of tooth-like projections on the conductor lamina ( Fig. 28H View FIGURE 28 ) and from the latter by the shape of the conductor lamina which is not sinuous in ventral view ( Fig. 28H View FIGURE 28 ). Females can be distinguished from both species by the smooth sternum ( Fig. 25G View FIGURE 25 ) and the absence of setae-bearing tubercles on the antero-ectal surface of the chelicerae ( Figs. 26D–F View FIGURE 26 ).

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

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

Female ( Myanmar, USNM). Habitus as in Figures 25E–H View 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. 25G View FIGURE 25 ). Chelicerae as in Figures 26D–F View FIGURE 26 . Genitalia with well-developed spermathecae ( Figs. 28 A –C View FIGURE 28 ). UE entire ( Figs. 28 A –B View 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. 131 View 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–H View 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