Chrissia formosa ( Klie, 1938 )

Ma, Shunxin & Yu, Na, 2020, Freshwater ostracods (Crustacea) from Hainan Island, southern China, with description of a new species, Zootaxa 4767 (2), pp. 201-243 : 225-226

publication ID	https://doi.org/10.11646/zootaxa.4767.2.1
publication LSID	urn:lsid:zoobank.org:pub:7C2AB767-FB07-4366-9519-C110AAB18559
DOI	https://doi.org/10.5281/zenodo.3798862
persistent identifier	https://treatment.plazi.org/id/03ACDE06-C255-FF87-49F3-FC3BFC5EFE3A
treatment provided by	Carolina (2020-04-27 19:00:32, last updated 2024-11-29 11:39:16)
scientific name	Chrissia formosa ( Klie, 1938 )
status

Treatment

Chrissia formosa ( Klie, 1938) View in CoL

Figures 19–20 View FIGURE 19 View FIGURE 20 .

1938b Stenocypris formosa n. sp. — Klie: 28 –30, figs. 8–11.

1974a Chrissia formosa ( Klie, 1938) View in CoL — Okubo: 5.

Material examined: Six females and five female valves from11DZ17, one female ( ECNU 20171114/HN09) dissected; two females from WN6.

Dimensions: Female, LV, n = 2, length 1.562 –1.586 mm, height 0.631 –0.635 mm.

Description: In lateral view, carapace elongated. Greatest height posterior of mid-length. Dorsal margin arched. Ventral margin slightly concave. Calcified inner lamella anteriorly wide. Septa on margins of carapace absent ( Fig. 19A View FIGURE 19 ). Eggs visible through pellucid valve (arrow a on Fig. 19A View FIGURE 19 ). Five long natatory setae on A2 exceeding tips of terminal claws, and one short almost reaching middle of next segment ( Fig. 20A View FIGURE 20 ). Both tooth-bristles on third endite of Mx slightly toothed. L6 five-segmented, with two d setae on basal segment ( Fig. 20B View FIGURE 20 ). UR asymmetrical. UR attachment with basal triangular reinforcement ( Fig. 20E View FIGURE 20 ). Seta Sa shorter than 1/2 length of claw Ga, claw Gp shorter than 1/2 length of claw Ga ( Fig. 20 View FIGURE 20 C–D). Stem of left UR smooth ( Fig. 20D View FIGURE 20 ), and right one with continuous line of denticles ( Fig. 20C View FIGURE 20 ).

Distribution: This species has been previously reported from Japan ( Okubo 2004; Smith et al. 2011), India ( Karuthapandi et al. 2014), the Philippines ( Victor & Fernando 1981b), Thailand ( Savatenalinton & Suttajit 2016) and Taiwan in China ( Klie 1938b). During this study, this species was found in Danzhou and Waning on Hainan Island.

Remarks: The maximum height of the valve is situated at mid-length in Klie (1938b) and Victor & Fernando (1981b). Hainan specimens are more similar to specimens found in Japan by Okubo (2004) and Smith et al. (2011), with maximum height situated slightly posterior of mid-length ( Fig. 19 View FIGURE 19 ).

References

Karuthapandi, M., Rao, D. V. & Innocent, B. X. (2014) Freshwater Ostracoda (Crustacea) of India-A checklist. Journal of Threatened Taxa, 6 (12), 6576 - 6581. https: // doi. org / 10.11609 / JoTT. o 3682.6576 - 81

Klie, W. (1938 a) Ostracoda, Muschelkrebse. In: Dahl, F. (Ed.), Die Tierwelt Deutschlands und der angrenzenden Meeresteile nach ihren Merkmalen und nach ihrer Lebensweise, 34, pp. 1 - 230.

Klie, W. (1938 b) Ostracoden aus Formosa. Bulletin of the Biogeographical Society of Japan, 8 (2), 21 - 33.

Okubo, I. (2004) Nihon tansui san kaimijinko rui ni tsuite. Kabushikigaisha Sanmon Insatsusho, Okayama, 72 pp. [in Japanese]

Okubo, I. (1974 a) Chrissia vittata sp. nov. from Japan (Ostracoda, Cyprididae). Proceedings of the Japanese Society of Systematic Zoology, 10, 1 - 9. https: // doi. org / 10.19004 / pjssz. 10.0 _ 1

Savatenalinton, S. & Suttajit, M. (2016) A checklist of Recent non-marine ostracods (Crustacea: Ostracoda) from Thailand, including descriptions of two new species. Zootaxa, 4067 (1), 1 - 34. http: // dx. doi. org / 10.11646 / zootaxa. 4067.1.1

Smith, R. J., Janz, H. & Okubo, I. (2011) Recent Cyprididae and Ilyocyprididae (Crustacea: Ostracoda) from Lake Biwa, Japan, including a summary of the lake's ostracod fauna. Zootaxa, 2874, 1 - 37.

Victor, R. & Fernando, C. H. (1981 b) Freshwater Ostracoda of the genera Chrissia Hartmann, 1957 and Stenocypris Sars, 1889 from Malaysia, Indonesia and the Philippines. Mitteilungen aus dem Hamburgischen Zoologischen Museum and Institut, 78, 151 - 168.

Figures

FIGURE 19. Chrissia formosa (Klie, 1938a). Female. ECNU20171114/HN09. A, external view of LV; B, external view of LV. Arrow a: eggs. Scale bar: 100 μm.

FIGURE 20. Chrissia formosa (Klie, 1938a). Female. ECNU20171114/HN09. A, A2; B, L6; C, right UR; D, left UR; E, UR attachment. Scale bars: 100 μm.

FIGURE 19. Chrissia formosa (Klie, 1938a). Female. ECNU20171114/HN09. A, external view of LV; B, external view of LV. Arrow a: eggs. Scale bar: 100 μm.

FIGURE 20. Chrissia formosa (Klie, 1938a). Female. ECNU20171114/HN09. A, A2; B, L6; C, right UR; D, left UR; E, UR attachment. Scale bars: 100 μm.