Crassignatha yamu 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 : 73-74

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

urn:lsid:zoobank.org:act:D4A81694-3689-4399-8D50-0A41AB03066D

Figs 76 H-I, 86 A-C, 87 , 94

Material Examined. Holotype: CHINA: Yunnan: Fugong Co., S Fork, Yamu He, 1.51 km 150° SW of confluence [with N Fork], Gaoligongshan , 27.11905°N, 98.83108°E, 1723 m, 26 April 2004, moist shaded embankments, C. Griswold, CGY13 (CASENT 9029321, HNU), 1♁.

Paratypes: [same data as holotype] (CASENT 9020751, CAS), 1♀ ; [same data as holotype] (CASENT 9020752, HNU), 1 ♀, 1 juv ; Fugong Co., Shilajia village on N fork, Yamu He , Gaoligongshan, 27.13440°N, 98.82625°E, 1792 m, 24 April 2004, moist steep stream banks, C. Griswold, CGY09 (CASENT 9029348, CAS), 1 ♀ ; 10 rd km W NuJiang on Shibali Rd. , N fork, Yamu He, Gaoligongshan, 27.13795°N, 98.82240°E, 1850 m, 25 April 2004, moist earthen embankments, C. Griswold, CGY11 (CASENT 9029291, with prey, CAS), 1 ♀ ; [same data] (CASENT 9020735, CAS), 2 ♀ ; [same data] (CASENT 9020736, HNU), 2 ♀ .

Etymology. Named for the type locality.

Diagnosis. Male distinguished by the long, flexible embolus describing a half circle turn ( Fig. 87A ).

Female distinguished by the duct path, which follows a complex path from the spermathecae to near the posterior margin of the epigynum, then runs anteriorly between the spermathecae before turning toward the origin near the scape apex ( Fig. 76I ). Among other Crassignatha species, only C. gudu shares with C. yamu a duct that runs from the posterior margin of the epigynum anteriorly to the region between the spermathecae before turning, meeting, and running in parallel to the copulatory opening; C. yamu distinguished from C. gudu by the region where the the ducts meet before running to the copulatory openings; in C. yamu , the ducts run straight and come together at a nearly 90° angle near the midpoint of the spermathecae ( Fig. 76I ) while in C. gudu , the ducts curve and come together near the posterior margin of the spermathecae ( Fig. 89D ).

Description. Carapace orange with small tubercles and sulci, less pronounced in female. Sternum dark brown. Legs orange, darker distally on tibiae and metatarsi, femora I and II slightly swollen basally in female. Abdomen subspherical, light to dark gray, with numerous small sclerotized patches, some baring long setae, male with single orange scutum laterally and posteriorly, female without sclerite around spinnerets ( Fig. 86 A-C).

Male palp: Median apophysis with one tapered process. Embolus long, flexible, tapered, makes a half turn, tip curved more strongly ( Fig. 87A ).

Vulva : Scape projects ventrally ( Fig. 86A ). Spermathecae separated by their diameter. Ducts arise from posteromesal part of spermathecae, follow complex path, meet between spermathecae before running to opening near scape apex ( Fig. 76I ).

Male (CASENT 9029321): Total length 0.75, carapace 0.35 long, 0.35 wide, clypeus 0.14, sternum 0.24 long, 0.24 wide, coxa IV separated by 2.08 times their width. Leg I: patella d1, tibia d2, metatarsus unmodified; Leg II: patella d1, tibia d2, v2, metatarsus excavated proximoventrally; Leg III: patella d1, tibia d1; Leg IV: patella d1, tibia d1. Metatarsal trichobothria: TmI: 0.46; TmII: 0.40; TmIII: absent. Leg measurements: see Appendix A.

Female (CASENT 9020752): Total length 0.94, carapace 0.42 long, 0.36 wide, clypeus 0.09, sternum 0.26 long, 0.24 wide, coxa IV separated by 2.00 times their width. Leg I: patella d1, tibia d2, p1; Leg II: patella d1, tibia d2; Leg III: patella d1, tibia d1; Leg IV: patella d1, tibia d1. Metatarsal trichobothria: TmI: 0.43; TmII: 0.45; TmIII: absent. Leg measurements: see Appendix A.

Figures

Figure 76. A, B, Crassignatha pianma sp. n. from Chang Yan He; C, D, Crassignatha yinzhi from Xiao Hei Shan Nature Reserve; E-G, Crassignatha quanqu sp. n. from Bang Bie village; H, I, Crassignatha yamu sp. n. from Yamu He. A, F, epigynum, lateral view; B, D, G, I, cleared vulva, dorsal view; C, E, H, epigynum, ventral view. CD: copulatory duct; S: spermatheca.

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 87. Crassignatha yamu sp. n. from Yamu 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 94. Distribution map, inset map shows study area. Blue: Epeirotypus dalong sp. n.; purple: Ogulnius barbandrewsi sp. n.; yellow: Theridiosoma diwang sp. n.; red: Zoma dibaiyin sp. n.; black: Coddingtonia euryopoides sp. n.; white: Mysmena shibali sp. n.; orange: Crassignatha yamu sp. n.