Ogulnius barbandrewsi 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 : 23-24

Ogulnius barbandrewsi Miller, Griswold & Yin , sp. n.

urn:lsid:zoobank.org:act:40A5E4AA-C340-4DE7-8B56-A361FF386056

Figs 3 C-D, 4-6 , 7 A-B, 94

Material Examined. Holotype: CHINA: Yunnan: Gongshan Co., Bingzhongluo Township, Guocai He at Fucai , 28.00858°N, 98.51894°E, 2800 m, 23 August 2006, tropical evergreen broadleaf forest, sifting leaf litter, J.A. Miller, D.H. Kavanaugh, JM06082301 (CASENT 9029332, HNU), 1 ♁.

Paratypes: [same data as holotype] (CASENT 9024438, HNU), 1 ♁, 1 ♀, 1 juv ; [same data as holotype] (CASENT 9029332, HNU), 1 ♁; [same locality] 16 August 2006, tropical evergreen broadleaf forest, sifting leaf litter, J.A. Miller, JM06081602 (CASENT 9024445, CAS), 2 ♁, 4 ♀, 1 juv ; Gaoligong Shan, Nujiang Prefecture: Nujiang State Nature Reserve , No. 12 Bridge Camp area , 16.3 airkm W of Gongshan, 27.715°N, 98.502°E, 2775 m, 15-19 July 2000, H.-M. Yan, D. Kavanaugh, C.E. Griswold, H.-B. Liang, D. Ubick, & D.-Z. Dong (CASENT 9016271, CAS), 7 ♁, 55 ♀, 40 juvs ; [same data] (CASENT 9016273, HNU), 1 ♁, 11 ♀, 2 juvs ; [same data], in Pimoa webs (CASENT 9029333, CAS), 1 ♁, 1 juv ; Nujiang Prefecture, native forest in Gaoligongshan at 9.5 road km ESE Pianma , 25.98333°N, 98.66667°E, 2500 m, 15-18 October 1998, C. Griswold, D. Kavanaugh, C.L. Long (CASENT 9029335, HNU), 2 ♀, 7 juvs ; [same data] (CASENT 9029334, HNU), 1 ♁, 2 ♀, 1 juv.

Etymology. Named for Barb Andrews, who helped guide the 2006 expedition to Kawakarpushan, including a stop at the type locality of this species.

Diagnosis. Female similar to O. pullus Bösenberg & Strand, 1906 , distinguished from this species by the shape of the posterior lip of the epigynum in dorsal view, convex in O. pullus ( Brignoli 1981: fig. 1), concave in O. barbandrewsi ( Fig. 3D ); by the posterolateral margins in ventral view, nearly straight and flush with abdomen in O. pullus ( Chikuni 1989) , bowed out from abdomen in O. barbandrewsi ( Fig. 3C ).

Diagnosis of male tentative because few (especially Asian) species have been described from the male and some descriptions are extremely limited in detail. Probably most similar to O. pullus (photographs in Chikuni 1989), distinguished from other species without abdominal humps by details of the shape of the median apophysis and embolic apophysis ( Fig. 4E,G ).

Description. Carapace, sternum, legs orange. Abdomen light gray mottled with dark purple, with dark purple dorsomedian stripe with uneven margins ( Fig. 4 A-D).

Male palp: Palpal tibia with one trichobothrium. Paracymbium oblong with filiform projection distally ( Fig. 5D ). Tegulum squamate ( Fig. 5E ). Median apophysis with apex oriented distodorsally ( Fig. 5C ). Conductor semitransparent ( Fig. 4E ). Embolic apophysis long and filiform (typical for genus; Fig. 4G ).

Vulva: Epigynum with transverse ridge near lip ( Fig. 6A ), posterolateral margins bowed out from abdomen ( Fig. 3C ). Spermathecae juxtaposed ( Fig. 3D ). Copulatory ducts wide at entrance ( Fig. 3D ).

Male (CASENT 9024445): Total length 1.24, carapace 0.56 long, 0.50 wide, clypeus 0.12, sternum 0.31 long, 0.34 wide, coxa IV separated by 2.00 times their width. Posterior median eyes separated by about their diameter. Macrosetae: Leg I: patella d1, tibia p1; Leg II: patella d1; Leg III: patella d1; Leg IV: patella d1. Metatarsal trichobothria: TmI: 0.12; TmII: 0.16; TmIII: 0.11. Leg measurements: see Appendix A.

Female (CASENT 9024445): Total length 1.57, carapace 0.51 long, 0.52 wide, clypeus 0.11, sternum 0.34 long, 0.34 wide, coxa IV separated by 1.90 times their width. Posterior median eyes separated by at least their diameter. Macrosetae as in male. Metatarsal trichobothria: TmI: 0.09; TmII: 0.13; TmIII: 0.15. Leg measurements: see Appendix A. Spinnerets ( Fig. 6 B-D).

Natural History. This species builds a sparse orb web ( Fig. 7 A-B).

Figures

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 5. Ogulnius barbandrewsi sp. n. from Guocai He at Fucai, SEM of male palp. A, prolateral; B, retrolateral; C, prolateral, detail showing MA; D, retrolateral, detail showing paracymbium; E, apicoventral; F, retroventral showing EA. C: conductor; EA: embolic apophysis; MA: median apophysis; PC: paracymbium; ST: subtegulum; T, tegulum.

Figure 6. Ogulnius barbandrewsi sp. n. from Guocai He at Fucai, SEM of female. A, epigynum; B, ALS; C, PMS; D, 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, t: tartipore.

Figure 7. Webs of theridiosomatid spiders. A, Ogulnius barbandrewsi sp. n. from No. 12 Bridge Camp area, juvenile; B, Ogulnius barbandrewsi sp. n. from Guocai He at Fucai, juvenile, arrow to spider facing away from hub, tensing radial thread; C, D, Theridiosoma diwang sp. n. from Xiao Hei Shan Nature Reserve, female. Arrows indicate location of spider.

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.