Pseudoleiobunum, Suzuki & Ohrui, 1972

Tan, Desmond Kai Teck, Tsurusaki, Nobuo, Fong, Jonathan J. & Zhang, Chao, 2025, Reinstatement of the genus Pseudoleiobunum Müller, 1914 with the inclusion of a new species from Hong Kong and reallocation of the Leiobunum maximum species complex (Arachnida: Opiliones: Eupnoi: Sclerosomatidae), Zootaxa 5646 (3), pp. 301-343 : 314

Pseudoleiobunum (superspecies maximum ) maximum yushan Suzuki, 1976

Leiobunum maximum yushan Suzuki, 1976: 198 , Figures 4–5 , 132–138, 288–289 ( ♂ Holotype: Tongpoo Hütte, Mt. Yushan, Taiwan); Suzuki, 1977: 149.

Diagnosis. General morphology similar to Pseudoleiobunum maximum formosum , but the penis is shorter and the glans is stout with no developed distolateral portion, while for other P. maximum subspecies most possess a developed lateral alate winging (Martens 1987), generally folded dorsally ( Suzuki 1976: figs 131, 138, 146, 160).

Distribution. Mt. Yushan, Eastern Taiwan. ( Fig. 12 ).

Figures

FIGURE 4. A–B Pseudoleiobunum lutulentum sp. nov., close-ups of pedipalpal tibia and tarsus apophyses. A (Left) Close-up of male pedipalpal patella and tibia, LINGU-INV154. A (Right) Close-up of female pedipalpal patella and tibia, LINGU- INV146. Red rectangles for patella apophyses, blue rectangles for tibia apophyses. Scale bar: 2 mm. B Full lateral view of left pedipalp; C–D Pseudoleiobunum lutulentum sp. nov. C Full lateral view of left chelicera. D Close-up of left chelicerae distal structure. Scale bars: 0.5 mm.

FIGURE 5. Pseudoleiobunum lutulentum sp. nov., close-up comparisons of femora II under light microscope and scanning electron microscope of leg surface, revealing the granules that are present in the legs of P. lutulentum sp. nov. A Light microscopy of leg II femur, LINGU-INV72. B Light microscopy of leg II femur, LINGU-INV106. C Scanning electron microscopy of the surface of leg II femur, LINGU-INV115. D Close-up of the granules on leg surface, LINGU-INV116. Scale bars: 100 μm for C; 20 μm for D.

FIGURE 12. Distribution of all recorded Pseudoleiobunum species across East Asia.