Crassignatha ertou Miller, Griswold & Yin, 2009

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 : 74-75

Crassignatha ertou Miller, Griswold & Yin , sp. n.

urn:lsid:zoobank.org:act:E0051348-2351-4E8D-8B2C-71871C4799B6

Figs 86 D-F, 88 , 89 A-B, 100

Material Examined. Holotype: CHINA: Yunnan: Longling Co., Mangkuan Township, Zaotang He at Baihualing village , 25.30450°N, 98.80059°E, 1635 m, 2 June 2005, good subtropical broadleaf forest, dusting webs in understory, C. Griswold, CGY135 (CASENT 9029324, HNU), 1 ♁.

Paratypes: [same data as holotype] (CASENT 9022397, HNU), 1 ♀ ; [same data as holotype] (CASENT 9022398, CAS), 1 ♁, 2 ♀; (CASENT 9029350, CAS) , 1 ♀; [same data as holotype] (CASENT 9029344, PV 1033-1041 , CAS), 1 ♀ .

Etymology. Formed from the Chinese words for two (èr) and bump (literally head, tóu), referring to the two bumps on the abdomen of this species.

Diagnosis. Male and female distinguished from other Crassignatha species by the presence of two lobes on the posterodorsal part of the abdomen. See also diagnosis of P. yinzhi ( Fig. 86 D-F).

Description. Carapace brown. Sternum brown with rugose texture. Legs orange with dark rings distally on tibiae and metatarsi. Abdomen subspherical, dark gray, with numerous small sclerotized patches, some baring long setae, both sexes with pair of conspicuous bumps on the posterodorsal part of the abdomen; male with single orange scutum laterally and posteriorly, female without sclerite around spinnerets ( Fig. 86 D-F).

Male palp: Median apophysis with one tapered process. Embolus a long, rigid, tapered helix making a three turns ( Fig. 88A ).

Vulva : Scape projects ventrally ( Fig. 86D ). Spermathecae separated by two thirds their diameter. Ducts arise from mesal part of spermathecae, follow complex path before opening near scape apex ( Fig. 89B ).

Male (CASENT 9022398): Total length 0.88, carapace 0.39 long, 0.35 wide, clypeus 0.13, sternum 0.25 long, 0.24 wide, coxa IV separated by 1.85 times their width. Leg I: patella d1, tibia d2, metatarsus unmodified; Leg II: patella d1, tibia d2, v3, metatarsus excavated proximoventrally; Leg III: patella d1, tibia d1; Leg IV: patella d1, tibia d1. Metatarsal trichobothria: TmI: 0.45; TmII: 0.41; TmIII: absent. Leg measurements: see Appendix A.

Female (CASENT 9022398): Total length 0.97, carapace 0.42 long, 0.35 wide, clypeus 0.12, sternum 0.28 long, 0.24 wide, coxa IV separated by 1.92 times their width. Leg I: patella d1, tibia d2; Leg II: patella d1, tibia d2; Leg III: patella d1, tibia d1; Leg IV: patella d1, tibia d1. Metatarsal trichobothria: TmI: 0.40; TmII: 0.42; TmIII: absent. Leg measurements: see Appendix A.

Figures

Figure 86. A-C, Crassignatha yamu sp. n. from Yamu He; D-F, Crassignatha ertou sp. n. from Zaotang He. A, D, female, lateral; B, E, female, dorsal; C, F, female, ventral.

Figure 88. Crassignatha ertou sp. n. from Zaotang He, male palp. A, prolateral; B, retrolateral. CB: cymbium; CT: cymbial tooth; E: embolus; EM: embolic membrane; MA: median apophysis; T: tegulum.

Figure 89. A, B, Crassignatha ertou sp. n. from Zaotang He; C, D, Crassignatha gudu sp. n. from Zaotang He; E, F, Crassignatha longtou sp. n. from Yamu He. A, C, E, epigynum, ventral view; B, D, F, cleared vulva, dorsal view. CD: copulatory duct; S: spermatheca.

Figure 100. Distribution map, inset map shows study area. Purple: Mosu nujiang sp. n.; blue: Crassignatha ertou sp. n.; red: Chanea suukyii sp. n.; yellow: Patu jidanweishi sp. n