Keysercypria obtusa ( Klie, 1940 ), 2011

Karanovic, Ivana, 2011, On the recent Cyclocypridinae (Podocopida, Candonidae) with description of two new genera and one new species 2820, Zootaxa 2820 (1), pp. 1-61 : 33-35

Keysercypria obtusa ( Klie, 1940)

( Figure 17 )

1940 Cypria obtusa Klie : p. 225, Figs 17–19 .

Redescription. Male: Carapace ovoid in lateral view, with dorsal margin almost evenly rounded. LV overlapping RV on all free margins. RV without marginal tubercles along free margin ( Figure 17F–H ).

Prehensile palps ( Figures 17B, C ): Right palp ( Figure 17C ) much more robust than left one ( Figure 17B ), finger with a triangular extension on dorsal margin and one terminal seta broad and well sclerified. Left palp with finger which is not so curved and long and one terminal seta distinguishable on the slide.

T2 ( Figure 17E ): Basal seta missing. Setae “e” and “f” reaching distal end of following segments. Seta “h3” on terminal segment reaching half L of terminal claw. Terminal claw poorly serrated and as long as three distal segments combined. T2 covered with long and dense pseudochaetae, all endopodal setae plumose.

T3 ( Figure 17D ): Basal segment without d2 seta, while seta d1 short. Setae “e”, “f” and “g” all being very short. Terminal segment almost as wide as long, L ratios between three distal setae (of which h1 and h2 being almost claw-like) 1: 2.2: 5.1.

Hemipenis ( Figure 17A ): Lobe “a” distally rounded, lobe “b” pointed, and much lower than lobe “a”. Internal structure impossible to be observed in the original dissection.

Zenker organ: Consisting of seven whorls of spines.

Remarks and affinities. Keysercypria obtusa ( Klie, 1940) is closely related to K. pellucida ( Sars, 1901) and K. circinata ( Würdig & Pinto, 1993) , and in all three species the RV lacks marginal tubercles. In fact, the lack of the marginal tubercles prompted Klie (1940) to place Keysercypria obtusa into the genus Cypria Zenker, 1854 . However, this North Brazilian species is more closely related to other species of the genus Keysercypria gen. nov. than to Cypria because it has a typical morphology of the hemipenis and chaetotaxy of T2 and T3. Beside the lack of the tubercles on the RV, K. obtusa differs from other species of the genus where tubercles are present, by the appearance of the prehensile palps and/or length of “h3” seta on the T2.

Figures

FIGURE 17. Keysercypria obtusa (Klie, 1940). A-E, lectotype ♂ (ZMH 524a); F-H, paralectotype ♀ (ZMH 524b): A— hemipenis; B—left prehensile palp; C—right prehensile palp; D—T3; E—T2; F—LV; G—RV; H—carapace, dorsal view. Scales = 0.1 mm. F-H modified after Klie (1940) and not to scale.

FIGURE 18. Kempfcyclocypris australis gen. nov. sp. nov. A, D, E—allotype ♀; B, C—holotype ♂: A—carapace, dorsal view; B—LV interior view; C—RV, interior view; D—RV, exterior view; E—LV, exterior view. Scales = 0.1 mm.

FIGURE 19. SEM of Kempfcyclocypris australis gen. nov. sp. nov. Paratype, ♀: A—Carapace, lateral view from right side; B—RV, interior view; C—terminal segment of Mxl palp; D—terminal segment of T3.