Vestalenula cylindrica Straub, 1952

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 : 68

Vestalenula cylindrica Straub, 1952

( Figure 10E–H )

Darwinula cylindrica Straub, 1952

Vestalenula cylindrica ( Straub, 1952) nov. comb. Janz et al. 2001

Vestalenula sp. – Smith and Kamiya, 2008

Remarks

With a height/length ratio of 0.45, and a Gm claw on the antenna that is about 50% the length of claw GM, this species most closely resembles Vestalenula cylindrica , which has previously been reported from Korea ( Chang et al. 2012). However, the keel on the right valve is relatively short, at about 18% of the length of the valve ( Figure 10G ), more similar to the keel of Vestalenula cornelia (see Smith et al. 2006). This apparent overlapping of characters of two species could indicate that there are unrecognized cryptic species within the genus, or that these characters are more plastic than previously assumed. Without a detailed statistical analysis of the amount of variation of features within the genus (which requires additional material), this issue cannot be currently resolved. Vestalenula cylindrica was found in one sample during our surveys, collected from a marsh (locality 25).

Superfamily TERRESTRICYTHEROIDEA Schornikov, 1969 Family TERRESTRICYTHERIDAE Schornikov, 1969

Figures

Figure 10. (A, B) Ishizakiella miurensis: (A) external view of male right valve (DB40049); (B) internal view of male left valve (DB40049). (C, D) Limnocythere sp.: (C) right view of female carapace (DB40050); (D) dorsal view of female carapace, anterior to right (DB40050). (E–H) Vestalenula cylindrica: (E) internal view of female left valve (DB40051); (F) internal view of female right valve (DB40051); (G) ventral view of female right valve (DB40051); (H) dorsal view of female carapace, anterior to right (DB40052). Scale bar = 270 µm for A, B; 137 for C, D; 183 µm for E–H.