Tonsilla jinggangensis K. Liu & X. Xu, 2020

Liu, Ke-ke, Luo, Hui-pu, Xu, Xiang, Chen, Zhiwu & Xiao, Yong-hong, 2020, Description of two new species of Tonsilla Wang & Yin, 1992 with an updated key to species (Araneae, Agelenidae), ZooKeys 944, pp. 31-46 : 31

Tonsilla jinggangensis K. Liu & X. Xu sp. nov. Figures 1 , 2 , 3

Type material.

Holotype ♀; China: Jiangxi Province, Ji’an City, Jinggangshan County Level City, Luofu Town, Pingtou Village, Jinggang Mountain National Nature Reserve, Changguling Forest Farm; 26°38'28"N, 114°14'6"E, 583 m; 5.X.2014; Ke-ke Liu et al. leg.

Etymology.

The specific name refers to the type locality; adjective.

Diagnosis.

The female of this species is similar to that of T. yanlingensis but differs by the long horn-shaped epigynal teeth (vs short, bell-shaped in T. yanlingensis ), the widened posterior part of atrium (vs narrowed in T. yanlingensis ) and the slender spermathecal heads (vs relatively short and curved in T. yanlingensis ) (Figs 1C, D , 2 , 3 ).

Description.

Female. Habitus as in Figure 1A, B . Total length 11.03. Carapace (Fig. 1A, B ) 6.84 long, 3.70 wide, anteriorly narrowed to between 0.8- and 0.9-time maximum width of carapace. Eye (Fig. 1A ) sizes and interdistances: AME 0.18; ALE 0.30; PME 0.20; PLE 0.24; AME-AME 0.18; AME-ALE 0.25; PME-PME 0.20; ALE-ALE 0.94; PME-PLE 0.38; PLE-PLE 1.38; ALE-PLE 0.18, AME-PME 0.21; AME-PLE 0.52. MOA: 0.62 long; 0.56 anterior width, 0.62 posterior width. Chelicerae (Fig. 1A, B ) with 3 promarginal teeth (median largest) and 3 retromarginal teeth (median largest). Leg measurements (Fig. 1A, B ): I 13.81 (3.82, 1.80, 2.91, 3.30, 1.98); II 12.24 (3.52, 1.76, 2.33, 2.88, 1.75); III 10.91 (3.23, 1.62, 1.83, 2.78, 1.45); IV 14.84 (4.22, 1.85, 3.11, 3.95, 1.71). Spination : I fe 211, ti 022, mt 055; II fe 211, ti 033, mt 055; III fe 122, pa *111, ti 055, mt 855, ta 021; IV fe 101, pa *101, ti 055, mt 855, ta 022. Pedicel 0.40. Abdomen (Fig. 1A, B ) 5.40 long, 3.26 wide.

Carapace brown. Chelicerae red brown. Endites, labium, and sternum yellow-brown. Legs yellow-brown. Abdomen dark brown, dorsally with 2 pairs of yellow-brown spots from antero-median to middle and 4 yellow-brown chevron-like stripes in posterior half.

Epigyne (Figs 1C, D , 2 , 3 ). Atrium deep, transverse, more than 2 times wider than long. Copulatory openings located at postero-lateral part of the atrium. Epigynal teeth long, horn-shaped, separated by its length, apex slightly convergent. Copulatory ducts slightly longer than spermathecae, originating posteriorly, extending forward along spermathecae and connected to anterior part of spermathecae. Spermathecae arched, with many constrictions, separated by less than radius of spermatheca. Spermathecal heads slender tube-shaped, posteriorly located, bent laterally. Fertilization ducts located at the posterior part of spermathecae.

Distribution.

Known only from the type locality in Jiangxi Province, China (Fig. 9 ).

Comments.

Although we have only the female of this species, we are convinced that it is not conspecific with T. makros a species known from Guizhou. The male of T. makros (6.20) is slightly larger than half of the female of T. jinggangensis sp. nov. (11.03). Tonsilla species seem to have a narrow distribution, except for T. truculenta from south China. Tonsilla jinggangensis sp. nov. and T. tautispina from Jiangxi are more similar to species from Hunan, such as T. lyrata and T. yanlingensis , than species from Guizhou ( T. makros , T. mopanensis ). Hence, the male palp of this species may have a stout patellar apophysis.

Figures

Figure 1. Tonsilla jinggangensis sp. nov., female holotype A habitus, dorsal view B same, ventral view C epigyne, ventral view D vulva, dorsal view. Scale bars: 2 mm (A, B), 0.2 mm (C, D). Abbreviations: At - atrium, CD - copulatory duct, CO - copulatory opening, EH - epigynal hood, ET - epigynal teeth, FD - fertilization ducts, SH - spermathecal heads, Spe - spermathecae.

Figure 2. SEM images of Tonsilla jinggangensis sp. nov., female holotype A epigyne, dorsal view B vulva, ventral view.

Figure 3. Tonsilla jinggangensis sp. nov., female holotype A epigyne, ventral view B vulva, dorsal view. Scale bars: 0.5 mm. Abbreviations: At - atrium, CD - copulatory duct, CO - copulatory opening, EH - epigynal hood, ET - epigynal teeth, FD - fertilization ducts, SH - spermathecal heads, Spe - spermathecae.

Figure 9. Type localities of Tonsilla jinggangensis sp. nov. and T. subyanlingensis sp. nov.