Stenocypris malayica, Smith, Robin J., Janz, Horst & Okubo, Ichiro, 2011

Smith, Robin J., Janz, Horst & Okubo, Ichiro, 2011, Recent Cyprididae and Ilyocyprididae (Crustacea: Ostracoda) from Lake Biwa, Japan, including a summary of the lake’s ostracod fauna, Zootaxa 2874, pp. 1-37 : 10

Stenocypris malayica Victor & Fernando, 1981

( Figs 5 C, D & 6B–E)

1981a Stenocypris malayica n. sp. —Victor & Fernando: 157–158, figs 34–45.

2007 Stenocypris malayica Victor & Fernando, 1981 —Meisch et al.: 98, tables 1, 2, 4, fig. 3b.

Remarks. The combination of a second ‘claw’ on the sixth limb (an enlarged h3 seta) ( Fig. 6 C) and tightly curved posterior margin of the carapace ( Fig. 6 B) easily distinguishes this species from other Stenocypris . Stenocypris malayica was previously reported from Malaysia, Indonesia ( Victor & Fernando 1981a), and Oceania ( Meisch et al. 2007). This is the first report from Japan and suggests that this species may be widespread. In Lake Biwa only five specimens were recovered off the Karasuma Peninsula. Locality ( Fig. 1 ): 25

Figures

FIGURE 1. Location of Lake Biwa and sampling localities that yielded Cyprididae and Ilyocyprididae species.

FIGURE 6. A— Stenocypris hislopi, right valve, internal view (LBM 1430003556). B – E Stenocypris malayica. B—right valve, internal view (LBM 1430003553). C—sixth limb (LBM 1430003552). D—right caudal ramus (LBM 1430003552). E—left caudal ramus (LBM 1430003552).

FIGURE 5. A & B Cypretta seurati. A—right lateral view of whole carapace. B—dorsal view of whole carapace, anterior to right (LBM 1430003550). C & D Stenocypris malayica. C—right lateral view of whole carapace (LBM 1430003551). D—left valve, internal view (LBM 1430003552). E & F Stenocypris hislopi. E—right lateral view of whole carapace (LBM 1430003554). F—left valve, internal view (LBM 1430003555). G & H Chrissia formosa. G—right valve, external view (LBM 1430003557). H—left valve, internal view (LBM 1430003557). I – L Ilyodromus intermedius Okubo n. sp. I—right lateral view of whole carapace (LBM 1430003560). J—left valve, internal view (LBM 1430003558). K—right valve, internal view (LBM 1430003558). L—dorsal view of whole carapace, anterior to right (LBM 1430003559). Scale bar = 335 µm for A & B, 652 µm for C & D, 769 µm for E & F, 675 µm for G & H, and 574 µm for I – L.