Key to Gaoligongshan Symphytognathidae

1 Carapace nearly smooth (Figs 69A, 70C); male abdomen lacking scutum (Fig. 65A).......................................................... Patu Marples, 1951 ........ 2

– Carapace sculptured with scales (Fig. 77 E-F, 78F) or denticles (Fig. 91A-D); abdominal scutum on male wraps around posterior (Fig. 74A)...................... ....................................................... Crassignatha Wunderlich, 1995 ........ 6

2(1) Females....................................................................................................... 3

– Males.......................................................................................................... 5

3(2) Female epigynum with scape (Fig. 67 A-C)............... Patu jidanweishi sp. n.

– Female epigynum without scape ................................................................. 4

4(3) Looped path of the spermatheca/duct complex (Fig. 67F), epigynum with two juxtaposed dark circles showing through the integument (Fig. 67E)....... ............................................................................................ Patu qiqi sp. n.

– Path of the spermatheca/duct complex elongate along longitudinal axis (Fig. 67H); epigynum with two less distinct comma-shaped structures showing through the integument (Fig. 67G) .............................. Patu xiaoxiao sp. n.

5(2) Embolus long, flexible (Fig. 66) ............................... Patu jidanweishi sp. n.

– Embolus short, not flexible (Fig. 73B) ................................. Patu qiqi sp. n.

6(1) Abdomen rounded posteriorly .................................................................... 7

– Two lobes on the posterodorsal part of the abdomen (Fig. 86 D-F) ............... ............................................................................ Crassignatha ertou sp. n.

7(6) Carapace sculptured with scales (Fig. 77 E-F, 78F). Metatarsus III lacking a trichobothrium ........................................................................................... 8

– Carapace sculptured with denticles (Fig. 91A-D). Metatarsus III with a trichobothrium..................................................... Crassignatha longtou sp. n.

8(7) Males.......................................................................................................... 9

– Females..................................................................................................... 12

9(8) Embolus long, with kink or partial turn. Prosoma declining or weakly domed behind posterior eyes ................................................................................ 10

– Embolus short (Fig. 75A). Prosoma strongly domed behind posterior eyes (Figs 74A, 77E)................................................ Crassignatha pianma sp. n.

10(9) Embolus long, flexible, describing a half circle turn (Fig. 87A) ..................... ............................................................................ Crassignatha yamu sp. n.

– Embolus shorter, rigid, helical or kinked, not describing a half circle turn..... 11

11(10) Embolus with a strong kink about 1/3 its length from the origin (Figs 81A, 82C) ................................................................... Crassignatha yinzhi sp. n.

– Embolus a single turn rigid spiral ribbon, not simply tapered but with a narrow waste near the midpoint (Fig. 84A)........... Crassignatha quanqu sp. n.

12(8) Scape oriented ventrally to posteroventrally (Figs 76F, 79D) with the distal lobe of the scape more narrow than the basal lobe (Figs 76G, 79C) and/or with the ducts running anteriorly between the spermathecae before turning posteriorly (Figs 76I, 89B, D)................................................................... 13

– Scape procurved (Figs 76A, 79B) composed of two lobes of equal width (Figs 76B, 79A); ducts do not run anteriorly between the spermathecae................ ........................................................................ Crassignatha pianma sp. n.

13(12) Distal lobe of the scape, more narrow than and projecting well beyond the basal lobe (Figs 76D, 79 C-D). Copulatory ducts mostly restricted to area posterior to spermathecae ......................................................................... 14

– Scape lobes not well differentiated or same width (Fig. 79A). Copulatory ducts double back to run between spermathecae before turning back toward scape......................................................................................................... 15

14(13) Scape projecting posteroventrally (Figs 79D, 80B). Abdomen dark in preserved specimens, subtriangular, maximum posterior extension of abdomen near dorsum........................................................ Crassignatha yinzh i sp. n.

– Scape projecting ventrally (Figs 76F, 79F). Abdomen pale in preserved specimens, subspherical, maximum posterior extension of abdomen near center .. ........................................................................ Crassignatha quanqu sp. n.

15(13) Ducts run straight and come together at a nearly 90° angle near the midpoint of the spermathecae (Fig. 76I).............................. Crassignatha yamu sp. n.

– Ducts curve and come together near the posterior margin of the spermathecae (Fig. 89D) ..................................................... Crassignatha gudu sp. n.