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 formosum

Liobunum maximum (in part) Roewer, 1957: 343.

Leiobunum maximum formosum Suzuki, 1976: 196 , Figures 1–3 , 127–131, 287 ( Type: Mt. Hsuehshan , Taipei, Taiwan); 1977: 149.

Diagnosis. General morphology similar to Pseudoleiobunum maximum distinctum Suzuki, 1973 , but with less armament on the pedipalps and legs. Labrum unarmed, mushroom-shaped with an enlarged distal portion ( Suzuki 1976: fig. 1–2). Female labrum thin, without the enlarged, mushroom-capped distal portion ( Suzuki 1976: fig. 3). Supracheliceral lamina narrow and pointed ( Suzuki 1976: fig. 128).

Distribution. Northern Taiwan (Figure 16).

Figures

FIGURE 1. Altitudinal map of Hong Kong, China and the locations of the specimens used in this study. Pseudoleiobunum lutulentum sp. nov. were found in places with higher altitudes and higher humidity, preferably streams.

FIGURE 2. Comparisons between Pseudoleiobunum specimens. A–C Comparison of female dorsal bodies between three Pseudoleiobunum species, highlighting features of the genus, yellow rectangle highlighting the small central, dorsal hump on the dorsal scutum; yellow circles highlighting the elevated lateral-posterior edges of the dorsal scute, resembling a pair of tubercles. D–E Comparison of general body size between male and female. F–G Comparison of male and female cheliceral size. A P. maximum distinctum, female. B P. japanense japonicus, female. C P. lutulentum sp. nov, LINGU-INV117, female. D Dorsal view of the female body, LINGU-INV117. E Dorsal view of the male body, LINGU-INV118. F Full lateral view of male chelicera, LINGU-INV72. G Full lateral view of female chelicera, LINGU-INV146. Scale bars: 1 mm.

FIGURE 3. Pseudoleiobunum lutulentum sp. nov., male (LINGU-INV154), body. A Dorsal view. B Ventral view. Scale bars: 1 mm.