Theridiosomatidae

Miller, Jeremy, Griswold, Charles & Yin, Chang, 2009, The symphytognathoid spiders of the Gaoligongshan, Yunnan, China (Araneae: Araneoidea): Systematics and diversity of micro-orbweavers, ZooKeys 11 (11), pp. 9-195 : 20-21

Key to Gaoligongshan Theridiosomatidae

1 Females ....................................................................................................... 2

Males.......................................................................................................... 9

2(1) Abdomen subtriangular, tapered posteriorly ( Fig. 8B ). Spermathecae separated by nearly their diameter ( Fig. 11F )... Coddingtonia euryopoides sp. n.

– Abdomen subspherical, not distinctly tapered posteriorly. Spermathecae juxtaposed ( Fig. 3D )........................................................................................ 3

3(2) Scape protrudes from beneath epigynal plate ( Figs 11C , 14C)...................... ............................................................................. Wendilgarda muji sp. n.

– Scape absent ( Fig. 11A ) or if present ( Fig. 3E ) then a simple extension of the epigynal plate.............................................................................................. 4

4(3) Posterior median eyes separated by at least their diameter ( Fig. 4C ).............. ..................................................................... Ogulnius barbandrewsi sp. n.

– Posterior median eyes separated by less than their diameter......................... 5

5(4) Epigynum subtriangular, pointed posteriorly with concave margins so medial part is more acute than lateral part ( Fig. 3E )......... Baalzebub nemesis sp. n.

– Epigynum otherwise, typically subrectangular ( Fig. 11A )............................ 6

6(5) Epigynum with a deep atrium, height of opening about one third the width in posterior view ( Fig. 3B ), without fleshy tissue at posterior margin of epigynum. Lateral pits absent....................................... Epeirotypus dalong sp. n.

– Atrium absent ( Fig. 3F ) or slit-like (Fig. 13A), height of opening (if visible) much less than one third the width in posterior view. Region between posterior margin of epigynum and abdomen often with fleshy tissue ( Fig. 3F ). Lateral pits present ( Fig. 9B ) ....................................................................... 7

7(6) Epigynum with pair of processes arising from posterolateral margin running towards each other ( Fig. 3H ) ........................ Theridiosoma shuangbi sp. n.

– Epigynum without pair of processes arising from posterolateral margin ...... 8

8(7) Posterior margin of epigynum with median longitudinal slit ( Figs 3F , 9A ). Abdomen tan with dark gray with silver patches ........................................... ........................................................................ Theridiosoma diwang sp. n.

– Posterior margin of epigynum entire ( Fig. 11A ). Abdomen dark gray with silver patches forming curved transverse stripe (Fig. l0A) .............................. ................................................................................... Zoma dibaiyin sp. n.

9(1) With long, filliform embolic apophysis ( Figs 4G , 14A)............................. 10

– Embolic apophysis absent ( Fig. 2C )..................... Epeirotypus dalong sp. n.

10(9) Posterior median eyes separated by about their diameter............................... ..................................................................... Ogulnius barbandrewsi sp. n.

– Posterior median eyes separated by less than half their diameter................ 11

11(10) Palpal tibia with one trichobothrium. Median apophysis sclerotized with concave dorsal margin (Fig. 12E).......................... Wendilgarda muji sp. n.

– Palpal tibia with two trichobothria. Median apophysis fleshy, with pointed dorsal apex (Fig. 10D) ................................................ Zoma dibaiyin sp. n.

Figures

Figure 2. Epeirotypus dalong sp. n. holotype from Fugong Co., male palp. A, prolateral; B, retrolateral; C, ventral. C: conductor; MA: median apophysis; PC: paracymbium; ST: subtegulum; T: tegulum; arrow in C indicates field of tubercles on mesal lobe of tegulum.

Figure 3. A, B, Epeirotypus dalong sp. n. from Fugong Co.; C, D, Ogulnius barbandrewsi sp. n.; C from Guocai He at Fucai; D from No. 12 Bridge Camp area; E, Baalzebub nemesis sp. n. from No. 12 Bridge Camp area; F, G, Theridiosoma diwang sp. n. from Xiao Hei Shan Nature Reserve; H, I, Theridiosoma shuangbi sp. n. from Xiao Hei Shan Nature Reserve. A, C, E, F, H, epigynum, ventral view; B, epigynum, posterior view; D, G, I, cleared vulva, dorsal view. CD: copulatory duct; S: spermatheca; arrow in A indicates transverse submarginal groove; in G and I indicate lateral pits, in H indicates base of one of two opposing lateral apophyses.

Figure 4. Ogulnius barbandrewsi sp. n. from Guocai He at Fucai. A-D, habitus; E-G, male palp. A, male, lateral; B, female, lateral; C, female, dorsal; D, female, ventral; E, prolateral; F, retrolateral; G, ventral. C: conductor; EA: embolic apophysis; MA: median apophysis; T, tegulum; arrow in D indicates sternal pit.

Figure 8. A, Baalzebub nemesis sp. n. from No. 12 Bridge Camp area; B, Coddingtonia euryopoides sp. n. from Zaotang He at Baihualing village; C-E, Theridiosoma diwang sp. n. from Xiao Hei Shan Nature Reserve, female. A, B, D, female, dorsal; C, female, lateral; E, female, ventral.

Figure 9. Theridiosoma diwang sp. n. from Xiao Hei Shan Nature Reserve, SEM of female. A, epigynum; B, epigynum, detail showing lateral pore; C, spinnerets; D, ALS; E, PMS; F, PLS. AC: aciniform gland spigot; AG: aggregate gland spigot; CY: cylindrical gland spigot; FL: flagelliform gland spigot; MAP: major ampullate gland spigot; mAP: minor ampullate gland spigot; n: nubbin; PI: piriform gland spigot, PLS: posterior lateral spinneret, PMS: posterior median spinneret, t: tartipore.

Figure 11. A, B, Zoma dibaiyin sp. n. from Pee He; C, D, Wendilgarda muji sp. n. from Xiao Hei Shan Nature Reserve; E, F, Coddingtonia euryopoides sp. n. from Zaotang He at Baihualing village; G-I, Mysmena changouzi sp. n. from from No. 12 Bridge Camp area. A, C, E, G, epigynum, ventral view; B, D, F, I, cleared vulva, dorsal view; H, epigynum, lateral view. Arrow in B indicates lateral pit.