Glenognatha tangi, new combination
Creators: name: Jimmy Cabra-García
name: Antonio D. Brescovit
Publisher: name: Zenodo
Year: 2016
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Araneae
Tetragnathidae
Glenognatha
Glenognatha tangi

description: Glenognatha tangi (Zhu, Song & Zhang, 2003) new combination
(Figs. 25–30, 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; Paratypes: 1♂ from Jinghong county, Yunnan province, China, 22º00´N, 100º48´E, 10.vii.1983, Zhu Chuandian leg., deposited in HU, not examined, 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); 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, 28H–I), the embolus (Fig. 27D, 28H), the paracymbium (Fig. 28G) and the female genitalia (Fig. 28A–C) 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). Males can be distinguished from the former by the absence of tooth-like projections on the conductor lamina (Fig. 28H) and from the latter by the shape of the conductor lamina which is not sinuous in ventral view (Fig. 28H). Females can be distinguished from both species by the smooth sternum (Fig. 25G) and the absence of setae-bearing tubercles on the antero-ectal surface of the chelicerae (Figs. 26D–F).
Description. Male and female described by Zhu et al. (2003). Additional data.
Male (Myanmar, USNM). Habitus as in Figures 25 A –D. Cephalothorax with pore-bearing and setae-bearing depressions (Figs. 29 A, E–F). Cephalothorax 0.70 high. Abdomen 1.05 high. Sternum 0.45 long, 0.50 wide, smooth (Fig. 29D). Chelicerae as in Figures 26 A –C. Cheliceral fang outgrowth well-developed (Fig. 26 A). Epiandrous fusules as in Figure 30C. Spinnerets as in Figures 30D–F. Palp as in Figure 27.
Female (Myanmar, USNM). Habitus as in Figures 25E–H. 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). Chelicerae as in Figures 26D–F. Genitalia with well-developed spermathecae (Figs. 28 A –C). UE entire (Figs. 28 A –B).
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).
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). 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).
description: Published as part of Jimmy Cabra-García & Antonio D. Brescovit, 2016, Revision and phylogenetic analysis of the orb-weaving spider genus Glenognatha Simon, 1887 (Araneae, Tetragnathidae), pp. 1-183 in Zootaxa 4069 (1) on pages 39-45, DOI: 10.11646/zootaxa.4069.1.1, http://zenodo.org/record/1054149