Lathys huangyangjieensis Liu, 2018

Liu, Keke, Meng, Zeyuan, Xiao, Yonghong & Xu, Xiang, 2018, Five new Lathys species (Araneae: Dictynidae) from South China and the first description of the male of Lathys spiralis Zhang, Hu & Zhang, 2012, Zootaxa 4500 (2), pp. 151-178 : 164-167

Lathys huangyangjieensis Liu spec. nov.

Figs 12–14 , 23

Type material. CHINA: Jiangxi Province: Ji’an City, Jinggangshan County Level City , Holotype male: Maoping Town , Huangyangjie Scenic Spot , coniferous and broad-leaved mixed forest, 26.456°N, 114.106°E, 958 m elevation, 5 April 2014, Keke Liu, Zhiwu Chen, Zeyuan Meng, Xiaoping Huang and Yubao Tang leg. ( ASM- JGSU) . Paratypes: 2 males, same data as holotype ( ASM-JGSU) .

Etymology. The specific name refers to the type locality; adjective.

Diagnosis. Males of the new species resemble those of L. ankaraensis , L. borealis , L. fibulata Liu spec. nov., L. heterophthalma , L. humilis , L. subalberta , L. stigmatisata , and L. subhumilis ( Lissner 2016; Marusik et al. 2009; Özkütük et al. 2016; Zhang et al. 2012) in having a long tegular apophysis extending from ventral to retrolateral edges of tibia, but can be clearly distinguished by the TA medially immobilized by the four distinct tibial apophyses including a ventral FTA, a ventrolateral FTA, a strong, long, retrolateral HTA and a small retrolateral HTA (without two HTA retrolaterally in L. ankaraensis , L. borealis , L. fibulata Liu spec. nov., L. heterophthalma , L. humilis , L. subalberta , L. stigmatisata , and L. subhumilis ) ( Figs 12C–F , 13D–H , 14 ).

Description: Male. Habitus as in Figs 12A–B . Total length 1.94, carapace ( Fig. 12A ) length 0.87, width 0.74. Eight eyes ( Fig. 12A ), anterior eye row slightly recurved and posterior one procurved; diameters and interdistances: AME 0.04, ALE 0.08, PME 0.09, PLE 0.08, AME–AME 0.11, ALE–AME 0.13, PME–PME 0.20, ALE–ALE 0.30, PLE–PME 0.17, PLE–PLE 0.37 ALE–PLE 0.17, AME–PME 0.16. Carapace anteriorly with a row of setae medially, cervical groove distinct, fovea longitudinal, indistinct ( Fig. 12A ). Chelicerae ( Figs 13A–C ) with 3 promarginal (almost equal size) and 3 retromarginal (second largest, the third near the apex of fang) teeth. Gnathocoxae longer than wide, with many setae, anteriorly with a single row serrula, labium sub-semicircular, anteriorly with a row of setae, sternum as long as wide ( Fig. 12B ), setae sparse, evenly with tubercles around setae on the surface. Opisthosoma ( Figs 12A, B ) broadly oval in dorsal view, length 1.08, width 0.88. Legs with many setae; measurements: I 2.68 (0.80, 0.29, 0.70, 0.55, 0.33); II 2.18 (0.70, 0.25, 0.52, 0.44, 0.27) III 1.77 (0.60, 0.23, 0.35, 0.34, 0.25); IV 2.13 (0.71, 0.23, 0.47, 0.47, 0.25); formula: I, II, IV, III. Metatarsus IV with distinct calamistrum, covering more than 1/3 of length of metatarsus, each seta apically bent.

Colouration. Carapace yellow, anterior part with dark slender stripes, posterior part with indistinct dark radiant stripes around fovea. Chelicerae yellow. Gnathocoxae anteriorly creamy-yellow, posteriorly yellow. Labium anteriorly creamy-yellow, posteriorly yellow-brown. Sternum grey-yellow to yellow-brown. Palp pale yellow. Legs yellow. Opisthosoma white to yellow-brown, dorsally with distinct pattern consisting of many white guanine crystals, irregular light stripes around medial part; in ventral view with light transverse band, posteriorly with a dark ring around spinnerets. Cribellum yellowish. Spinnerets yellow.

Palp as in diagnosis ( Figs 12C–F , 13D–H , 14 ). Bulb spherical, with large and long TA. Base of TA without spiral, extending from ventral to retrolateral edges of tibia. Basal part of tegular apophysis with triangular apex and visible Gr ( Fig. 13G ). Embolus arising from the posterior part of bulb, spiraled one loop around tegulum, apex not visible, but probably embedded in the groove of TA.

Female: Unknown.

Distribution. Known only from type locality in Jiangxi Province ( Fig. 23 ).

Figures

FIGURES 12A–F. Lathys huangyangjieensis Liu spec. nov., holotype male. A Habitus, dorsal. B Same, ventral. C Left palp, prolateral. D Same, ventral. E Same, retrolateral. F Same, dorsolateral. Scale bars: A, B 0.5 mm; C–F 0.25 mm.

FIGURES 13A–H. Lathys huangyangjieensis Liu spec. nov., holotype male, SEMs. A Left chelicera, ventrolateral. B Same, posterior. C Same, promarginal teeth, posterior. D Left palp, prolateral. E Same, ventral. F Same, dorsolateral. G Same, showing details of TA and tibial apophyses. H Same, showing details of TA and tibial apophyses, dorsal. Abbreviations: Em— embolus, FTA—finger-shaped tibial apophysis, Gr—groove, HTA—hook-shaped tibial apophysis, TA—tegular apophysis. Scale bars: A, B, E, F 20 µm; C, G, H 10 µm; D 0.1 mm.

FIGURES 14A–C. Lathys huangyangjieensis Liu spec. nov., holotype male, left palp (A ventral, B ventro-retrolateral, C dorsolateral). Abbreviations: Em—embolus, FTA—finger-shaped tibial apophysis, HTA—hook-shaped tibial apophysis, TA— tegular apophysis. Scale bars: 0.25 mm.

FIGURE 23. Collection localities for Lathys adunca Liu spec. nov., L. deltoidea Liu spec. nov., L. fibulata Liu spec. nov., L. huangyangjieensis Liu spec. nov. and L. zhanfengi Liu spec. nov. in Jinggangshan National Natural Reserve, Jiangxi Province and distribution of L. spiralis Zhang, Hu & Zhang, 2012 in China.