Freshwater ostracods (Crustacea) from Hainan Island, southern China, with description of a new species Author Ma, Shunxin Author Yu, Na text Zootaxa 2020 2020-04-24 4767 2 201 243 journal article 22584 10.11646/zootaxa.4767.2.1 67c03d05-6c1c-4f88-862d-b061d05e9bf9 1175-5334 3770727 urn:lsid:zoobank.org:pub:7C2AB767-FB07-4366-9519-C110AAB18559 Vestalenula sp. Figures 33 and 34 . Material examined: Two females from JFL15, one female ( ECNU 20170413/HN43) dissected. Dimension: Female, RV, n = 1, length 0.452 mm , height 0.229 mm . Description: LV overlapping RV both anteriorly and posteriorly ( Fig. 33A ). Posterior end wider than anterior. Dorsal margin slightly arched. Keel on RV short ( Fig. 33B ). Ventral seta on the third segment of A1 absent ( Fig. 34A ). Exopodite on A2 with one long seta. Both claws on terminal segment ( GM and Gm ) approximately same lengths ( Fig. 34B ). UR base narrow. P-abd short and without any seta ( Fig. 34C ). FIGURE 33. Vestalenula sp. Female. ECNU20170413/HN43. A, dorsal view, anterior to the right; B, internal view of RV. Scale bars: 100 μm. Distribution: This species was found in Jianfengling National Forest Park on Hainan Island. Remarks: According to the following characters: L/H of the carapace smaller than 2.2, P-abd without seta, third segment of the A1 without ventro-apical seta, shape of the UR base, this species is similar to Vestalenula spec. D, Rossetti & Martens, 1999 , but this species can be distinguished from Vestalenula spec. D by the following characters: the dorsal margin is extremely straight in Vestalenula spec. D but slightly arched in Vestalenula sp. from Hainan ; claw Gm on the A 2 in Vestalenula sp. from Hainan is much longer than that of Vestalenula spec. D. ( Pinto et al. 2013 ; Rossetti & Martens 1999 ). Only two females were collected in April 2017 during our two collection trips. The number of specimens is insufficient to provide a full description of this species.