Crassignatha longtou 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 : 76-77

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

urn:lsid:zoobank.org:act:1C85F693-BCDE-4166-B0EB-5EE8998D3C50

Figs 89 E-F, 90-92 , 95

Material Examined. Holotype: CHINA: Yunnan: 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 9029292, HNU), 1 ♀.

Paratypes: [same data as holotype] (CASENT 9020731, CAS), 2 ♀ ; [same data as holotype] (CASENT 9020733, HNU), 3 ♀, 1 juv ; [same data as holotype] (CASENT 9020732, HNU), 2 ♀ ; [same data as holotype] (CASENT 9020734, CAS), 1 ♀ ; [same data as holotype] (CASENT 9020744, with prey, CAS), 1 ♀ ; Fugong Co., 4.5 km N Aludi Village, 22.1 km N Fugong , 26.10829°N, 98.87162°E, 1250 m, 23 April 2004, in stream gorge, C. Griswold, CGY07 (CASENT 9020740, HNU), 1 ♀ ; Fugong Co., 4.5 km N Aludi Village, 22.1 km N Fugong , at stream entering NuJiang, 26.10829°N, 98.87162°E, 1263 m, 22 April 2004, in stream gorge, C. Griswold, CGY05 (CASENT 9020714, CAS), 1 ♀ ; [same data] (CASENT 9020713, HNU), 1 ♀ ; 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 9020720, CAS), 2 ♀ ; [same data] (CASENT 9020721, CAS), 1 ♀ ; [same data] (CASENT 9029353, CAS), 2 ♀ .

Etymology. Formed from the Chinese words for dragon (lóng) and head (tóu

), referring to the spiny texture of the carapace.

Diagnosis. Readily distinguished from other Crassignatha species by the fields of pointed spines on the carapace (91A-D). Further distinguished by the presence of a well developed sclerite around the spinnerets ( Fig. 90A, C ), a trichobothrium on the third metatarsus, and by the presence of two subequal teeth on the chelicerae (Fig. 91E). Placement of this species in the genus Crassignatha is tentative.

Description. Carapace dark orange, with three fields of pointed tubercles around thoracic margin (Fig. 91A). Sternum brown with rugose texture. Chelicerae with two subequal teeth (Fig. 91E). Legs orange, distal part of tibiae darker, femora I and II slightly swollen basally. Abdomen subspherical, mottled medium and light gray, with numerous small light sclerotized patches, some baring long setae, with conspicuous orange sclerite around spinnerets ( Fig. 90 ).

Vulva: Epigynum a raised transverse lobe ( Figs 89E , 91F). Round spermathecae separated by slightly less than their diameter. Ducts arise from mesal part of spermathecae, follow complex path to pair of openings ( Fig. 89F ).

Female (CASENT 9020720): Total length 0.87, carapace 0.35 long, 0.35 wide, clypeus 0.10, sternum 0.23 long, 0.22 wide, coxa IV separated by 2.31 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: 0.33; TmII: 0.38; TmIII: 0.41. Leg measurements: see Appendix A.

Male unknown.

Figures

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 90. Crassignatha longtou sp. n. from Yamu He, female. A, lateral; B, dorsal; C, ventral.

Figure 92. Crassignatha longtou sp. n. from Yamu He, SEM of female spinnerets. A, spinnerets; B, ALS; C, PMS; D, PLS. AC: aciniform gland spigot; AG: aggregate gland spigot; ALS: anterior lateral spinneret; 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 95. Distribution map, inset map shows study area. Blue: Baalzebub nemesis sp. n.; red: Theridiosoma shuangbi sp. n.; purple: Mysmena jinlong sp. n.; yellow: Crassignatha longtou sp. n.