Troglohnia Lin & Li, 2023

Chu, Chang, Lin, Yejie & Li, Shuqiang, 2023, New genera and new species of Hahniidae (Araneae) from China, Laos, Myanmar, and Vietnam, ZooKeys 1187, pp. 91-134 : 91

Genus Troglohnia Lin & Li gen. nov.

Type species.

Troglohnia qiubei sp. nov. from Yunnan, China.

Diagnosis.

Troglohnia gen. nov. can be distinguished from all other genera of Hahniidae by having stridulatory files on sides of pars cephalica (Figs 1C , 2B ), strongly modified patella 1.5-2 × wider than tibia (Figs 10A , 12A , 15A ), retrolateral tibial apophysis with two arms (Figs 10B , 12B , 15B ), edge of cymbial furrow S-shaped (Figs 10B , 12B , 15B ), base of embolus with tooth and embolus running along tegulum, on some distance, basal part rises from tegular bend at 90° (Figs 10A , 12A , 15A ), genital groove with a pair of hoods posteriorly, distance between hoods almost 1.5-2 × longer than length of epigynal plate (Fig. 18A-D ), and copulatory ducts with a fork at the expanded part of them (Fig. 18A-D ).

Description.

Male. Total length 2.33-3.21 (n = 8). Carapace yellowish, middle region with indistinct brown band, margin with brown pattern, lateral cephalic region with stridulatory files. PER longer than AER, AER straight, PER procurved. AME separated by less than diameter; PME separated by almost diameter, approximately as far from ALE; distance between AME and PME longer than that between ALE and PLE; ALE and PLE almost touching. Clypeus pale yellow, covered with several setae. Chelicerae pale yellow, with two or three promarginal and three or four retromarginal teeth, chelicerae with stridulatory files. Endites, labium pale yellow, covered with few black setae. Sternum brown, covered with brown setae. Legs pale yellow. Opisthosoma grey, middle of anteriorly and laterally with rod-shaped brown patterns, middle of posteriorly with inverted V-shaped brown patterns; venter with brown patterns and brown ring around spinnerets. Spinnerets base brown and tip white, straight in posterior view. Tracheal spiracle long and transverse, located at 3/4 of opisthosoma length.

Palpal femur almost 2 × longer than patella, spineless. Patella modified, strongly swollen, longer and> 1.5 × wider than tibia. Retrolateral tibial apophysis with 2 sickle-shaped and without serrated arms, basal with an apophysis with a line of setae. Cymbium kidney-shaped, ~ 1.5 × longer than wide. Cymbial furrow S-shaped, almost as long as cymbium. Bulb almost oval, ca 1.23 × longer than wide. Sperm duct with U-shaped curve (Fig. 3C ). Conductor almost 0.5 × longer than bulb, length of stalk almost 1/3-1/2 of total conductor length. Embolic base wide, with embolic tooth. Embolus starting at ca 1:30-4:00 o’clock from tegular, curving clockwise, embolic tip covered by bulb.

Female. Total length 2.25-3.86 (n = 21). Somatic characters as in male but chelicerae with three promarginal and three or four retromarginal teeth, stridulatory files absent.

Epigynal plate almost 1.3-1.45 × wider than long, genital groove with a pair of posterior hoods. Copulatory openings located medium, arc-shaped. Copulatory ducts long, strongly convoluted, base thick, bifurcate, then become thinner; short one connected to secondary spermathecae, other connected to primary spermathecae. Primary spermathecae oval or bean-shaped, secondary spermathecae globular. Fertilization ducts laminar, sickle-shaped.

Etymology.

The new generic name is a combination of Troglobiont (refers to the cave habitat) and Hahnia. The gender is feminine.

Composition.

This new genus includes four species: Troglohnia dafang sp. nov. (♂♀), T. qiubei sp. nov. (♂♀), T. shidian sp. nov. (♀), and T. wuding sp. nov. (♂♀).

Distribution.

China (Guizhou, Yunnan) (Fig. 30 ).

Figures

Figure 1. Cephalic region and chelicerae, paratype males, lateral view A Goblinia tiane sp. nov. B Myahnia kanpetlet sp. nov. C Troglohnia qiubei sp. nov. D Typhlohnia rongshui sp. nov.

Figure 2. Stridulatory files, paratype males, lateral view A Goblinia tiane sp. nov. B Troglohnia qiubei sp. nov.

Figure 3. Paratype male bulbs, ventral view A Goblinia tiane sp. nov. B Myahnia kanpetlet sp. nov. C Troglohnia qiubei sp. nov. D Typhlohnia rongshui sp. nov. Red arrows show the tegular outgrowth. Abbreviations: C = conductor, E = embolus, SD = sperm duct.

Figure 10. Troglohnia dafang sp. nov., holotype male A ventral view B retrolateral view. Dashed line shows conductor stalk. Abbreviations: C = conductor, CF = cymbial furrow, dRTA = dorsal retrolateral tibial apophysis, E = embolus, ET = embolic tooth, PA = patellar apophysis, RTA = retrolateral tibial apophysis, vRTA = ventral retrolateral tibial apophysis.

Figure 12. Troglohnia qiubei sp. nov., holotype male A ventral view B retrolateral view. Dashed line shows conductor stalk; red arrow shows the process on tegulum. Abbreviations: C = conductor, CF = cymbial furrow, dRTA = dorsal retrolateral tibial apophysis, E = embolus, ET = embolic tooth, PA = patellar apophysis, RTA = retrolateral tibial apophysis, vRTA = ventral retrolateral tibial apophysis.

Figure 15. Troglohnia wuding sp. nov., holotype male A ventral view B retrolateral view. Dashed line shows conductor stalk; red arrow shows the process on tegulum. Abbreviations: C = conductor, CF = cymbial furrow, dRTA = dorsal retrolateral tibial apophysis, E = embolus, ET = embolic tooth, PA = patellar apophysis, RTA = retrolateral tibial apophysis, vRTA = ventral retrolateral tibial apophysis.

Figure 18. Epigynes of Troglohnia gen. nov., ventral view A Tr. dafang sp. nov. B Tr. qiubei sp. nov. C Tr. shidian sp. nov. D Tr. wuding sp. nov. Abbreviations: CD = copulatory duct, CO = copulatory opening, H = hood, PS = primary spermatheca, SS = secondary spermatheca.

Figure 30. Distribution records of new Hahniidae species in South-east Asia 1 Goblinia tiane sp. nov. 2 Myahnia kanpetlet sp. nov. 3 Troglohnia dafang sp. nov. 4 Tr. qiubei sp. nov. 5 Tr. shidian sp. nov. 6 Tr. wuding sp. nov. 7 Typhlohnia banlaksao sp. nov. 8 Ty. kaiyang sp. nov. 9 Ty. rongshui sp. nov. 10 Ty. sondoong sp. nov. 11 Ty. suiyang sp. nov.