Potamocypris variegata ( Brady and Norman, 1889 ), 2014

Smith, Robin James, Lee, Jimin & Chang, Cheon Young, 2014, Nonmarine Ostracoda (Crustacea) from Jeju Island, South Korea, including descriptions of two new species, Journal of Natural History 49 (1), pp. 37-76 : 64

Potamocypris variegata ( Brady and Norman, 1889)

( Figure 8G, H )

Cypridopsis variegata Brady and Norman, 1889

Potamocypris variegata ( Brady and Norman, 1889) nov. comb. Daday 1900

Remarks

This species has a wide, probably Holarctic distribution (see review of distribution in Meisch 2000), but this is the first report from north-east Asia. It is often found in stagnant and slow flowing waters with dense vegetation ( Meisch 2000). During our surveys, Potamocypris variegata was found at only one locality (locality 35), in the lower reaches of a river.

Previously, Kim and Min (1991a) reported Potamocypris mastigophora ( Meuthuen, 1910) (as Potamocypris producta ( Sars, 1924)) from Jeju Island. Their specimens were ‘severely damaged’ by formalin, and they noted that they were unable to illustrate their specimens in detail ( Kim and Min 1991a). Their species determination therefore remains questionable, but as their specimens have five spine-like setae on the final segment of the maxillula (in contrast to four in P. variegata ), they are clearly a different species.

Figures

Figure 8. (A, B) Strandesia flavescens: (A) internal view of female left valve (DB40044); (B) internal view of female right valve (DB40044). (C–F), Tanycypris alfonsi: (C) internal view of female left valve (DB40045); (D) internal view of female right valve (DB40045); (E) lateral view of posterior inner lamella of female left valve (DB40045); (F) external view of female right valve (DB40045). (G, H) Potamocypris variegata: (G) left view of female carapace (DB40046); (H) dorsal view of female carapace, anterior to right (DB40046). (I, J) Heterocypris salina: (I) left view of female carapace (DB40047); (J) dorsal view of female carapace, anterior to right (DB40047). Scale bar = 725 µm for A, B; 495 µm for C, D, F; 164 µm for E; 207 µm for G, H; 409 µm for I, J.