Adineta jinan Wang & Yang, 2025

Wang, Wenbo, Yang, Yufeng, Örstan, Aydin, He, Zhili & Wang, Qing, 2025, Species diversity of bdelloid rotifer (Rotifera, Bdelloidea) in different areas in China, with a description of two new species, ZooKeys 1229, pp. 1-23 : 1-23

Adineta jinan Wang & Yang sp. nov.

Material examined.

Holotype: China • one female on permanent slide; Guangdong province, Shenzhen city, Shenzhen Fairy Lake Botanical Garden ; 22.5786 ° N, 114.1797 ° E; 77 m a. s. l.; collected on 5 Dec. 2021; W. B. Wang leg.; collected from leaf litter and mosses near a streamlet; SYSBM Ro-20221229-04 . Paratypes: • two females on permanent slides; same data as for holotype; SYSBM Ro-20221229-05 and SYSBM Ro-20221229-06 . All deposited in the Museum of Biology, Sun Yatsen University, Guangzhou, China.

Differential diagnosis.

Spurs short stubs at right angles to foot and united by a narrow ridge. A large spherical swelling present on each side of anal pseudosegment. Integument rough, has a sculpture of delicate granulation.

Description.

Body of medium size, not wide, flattened. Integument transparent, rough. Interior of trunk always coloured mahogany, head and foot lighter in colour. Head trapezoid, wider in posterior part; HL 19.9–22.9 % of TL, HW 69.8-100 % of HL. Distal rostral lamella wide and flat, with a V-shaped notch in the middle; without sensory bristles. Five U-shaped gaps on each rake. Neck of moderate length and width, significantly narrower than posterior head; NL 12.3–16.6 % of TL. Trunk vase-shaped; BW 18.8–29.2 % of TL. A large spherical swelling present on each side of anal pseudosegment; RL 13.4–14.9 % of TL, RW 84.6–127 % of RL. Wide foot of three pseudosegments, short; FL 8.8–12.3 % of TL, FW 64.5–104.3 % of FL. Spurs short stubs at right angles to foot and united by a narrow ridge. Three stubby toes. No eyespots. Trophi, 11–14 μm long and 6–7 μm wide; dental formula 2 / 2 (Fig. 3 ).

Comparison with other species.

There is no other known Adineta species with spurs similar to those of Adineta jinan sp. nov. Adineta cuneata Milne, 1916 also has very short spurs that are widely separated, but not joined across the foot. In addition, there is a deep constriction between the pseudosegment carrying the spurs and the one before it ( Milne 1916), which is absent in Adineta jinan sp. nov. Schulte (1954: Abb. 40) and Haigh (1963: fig. 1 A) gave brief descriptions of an Adineta variety with short spurs that were apparently curved anteriorly and which they both identified tentatively as A. cuneata . However, the rotifer they observed did not match the description of A. cuneata and may have been Adineta jinan sp. nov. or a variety similar to it.

Measurements.

See Table 2 .

Distribution.

The new species is known only from Shenzhen city.

Etymology.

The species is named after Jinan University, where the authors WW, Y Y, and QW work.

Figures

Figure 3. Adineta jinan sp. nov. A creeping, ventral view B creeping, ventral view C creeping, dorsal view D head, ventral view E spurs, ventral view F spurs, ventral view.