Keysercypria affinis ( Klie, 1933 ) Karanovic, 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 : 25-27

Keysercypria affinis ( Klie, 1933) comb. nov.

( Figures 12 , 13 )

1933 Physocypria affinis Klie : p. 369, Fig. 1–5 .

1940 Physocypria affinis Klie : p. 220.

Redescription. Male: Carapace ovoid in lateral view, with dorsal margin almost evenly rounded. LV overlapping RV on all free margins. RV with marginal tubercles along free margin.

A1 ( Figure 12F, H ): 7-segmented. First segment with one seta anteriorly and two setae posteriorly (one shown in figure 12H). Second segment with one anterior seta, which is plumose and not reaching mid length of following segment. Third segment with one anterior seta, which exceeds distal end of following segment. Fourth segment with one posterior seta, which exceeds distal margin of penultimate segment, and two long anterior setae. Fifth segment with two long anterior setae and one long and one short posterior seta, latter one being plumose. Penultimate segment with three anterior setae (one dorsal—alpha seta, and two ventral setae) and two posterior setae, one long and other short, plumose and claw-like. Terminal segment with two long setae, one claw and aesthetasc, ya, which is only slightly longer than terminal segment. Last five segments almost all equally long.

A2 ( Figure 13C, E ): Exopod consisting of plate, one long and two short setae. First endopodal segment with one ventral seta and total of 5 swimming setae, the most external one missing. Swimming setae by far exceeding distal end of terminal claws. Penultimate segment subdivided with two male sexual bristles (transformed setae t2 and t3), seta t4 being long and almost reaching tips of terminal claws. Seta t1 short and reaching distal end of penultimate segment and accompanied with short claw which covered with small setules. Setae z1 and z2 transformed in claws, former one being short, latter one long. Seta z3, normally developed and long. Claw G2 long, while G1 reduced and half as long as G2. Claw GM and Gm almost equally long. Terminal segment very long and practically consisting of two parts, which are not divided, thus not forming separate segments: proximal, short part with y3 distally, and distal long part (two times longer than proximal one) with Gm and GM claws. Aesthetasc Y very short.

Mxl palp ( Figure 12I ): First segment very broad with five anterior and one posterior seta. Terminal segment with 4 claws.

Prehensile palps ( Figures 12J , 13D ): Right palp ( Figure 13D ) much more robust than left one ( Figure 12J ), finger with a square dorsal part, one terminal seta broad and well sclerified, other short and thin. Left palp with thin finger; terminal setae not distinguishable on the slide.

T2 ( Figure 13B, G ): Basal seta missing. Setae “e” and “f” reaching distal end of penultimate segment. Seta h3 on terminal segment very long, whip-like and exceeding tip of terminal claw. Terminal claw poorly serrated and as long as three distal segments combined.T2 covered with long and dense pseudochaetae, setae “e” and “f” plumose. T3 ( Figure 13A ): 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: 2.7: 7.

UR ( Figure 12D ): L ratios between anterior margin, anterior, and posterior claw equaling 2.5: 1.5: 1. Posterior seta, long and inserted slightly more proximally on posterior margin.

Hemipenis ( Figure 13F ): Lobe a distally fist-like, lobe “b” pointed. Internal structure impossible to be observed in the syntypes.

Zenker organ: Consisting of seven whorls of spines.

Female: Carapace similar to that of male (12C–E).

A2 ( Figure 12A ): Claw G2 about two times longer than terminal segment, claw G3 curved distally, seta z1 transformed into short claw, other z-setae normally developed.

T2 ( Figure 12K ): Seta “h3” short.

UR ( Figure 12B ): L ratios of anterior margin, anterior and posterior claw 1.9: 1.3: 1. Posterior seta reaching distal margin of UR. Genital field rounded, without any extensions.

Remarks and affinities. Drawings provided by Klie (1933) show a much shorter posterior seta on the UR of female, than in the type material I have examined, which is deposited at the Zoological Museum in Hamburg. Also, Klie did not mention the long “h3” seta on the terminal segment of T2. This seta is, however, long only in males and short in females. All the species of the genus Keysercypria gen. nov. are morphologically very similar, and there seems to be a very limited number of distinguishing characters. Keysercypria affinis ( Klie, 1933) is most closely related to K. deformis ( Klie, 1940) because of the long “h3” seta. They differ by a wider anterior selvage on the LV in the latter species, and also by a less pronounced “angular” appearance of the finger of the right prehensile palp, and a lower positioned lobe “b” in relation to the lobe “a”. Keysercypria obtusa ( Klie, 1940) , K. pellucida ( Sars, 1901) , and K. circinata ( Würdig & Pinto 1993) differ from K. affinis by the absence of the small tubercles along the free margin on the RV; K. longiseta ( Klie, 1930) has a horn-shaped extension dorsally on the finger of the right prehensile palp; in K. sanctaeannae ( Margalef, 1961) , “h2” seta on T3 is more than four times longer than “h1” seta of the same appendage. The difference between K. affinis and K. schubarti ( Farkas, 1958) is only given in the presence of a long “h3” seta on T2. Since this character does not appear in females it is possible that it is a part of an intraspecific variability, or that is really sexually dimorphic. Both possibilities need to be checked on more material.

Figures

FIGURE 1. A, Cyclocypris washingtoniensis Dobbin, 1941, syntype (male, SMNH 335865); B, C, E, H, I, Cyclocypris sharpei Furtos, 1933, B, C, E Paratype (♂, SMNH 67879), H, I paratype (♂, SMNH 67920); D, F, G, C. cruciata Furtos, 1935 holotype (♂, SMNH 71416): A—left prehensile palp, B—T3, without basal segment, C—T2; D, E—UR, F—LV, interior view (valve broken), G—RV, interior view; H—LV, interior view; I—RV, interior view. Scales = 0.1 mm.

FIGURE 2. Cyclocypris pusilla Sars, 1895, type (NHMO F11355): A—carapace, dorsal view; B—carapace, exterior view from the left side (carapace slightly tilted); C—T2, D—UR; E—T3, withouth basal segment; F—hemipenis, outline only. Scales = 0.1 mm.

FIGURE 3. Distribution of the genus Cyclocypris Brady & Norman, 1889: 1—C. ampla Furtos, 1933; 2—C. brevisetosa Bronstein, 1928; 3—C. diebeli Absolon, 1978; 4—C. forbesi Sharpe, 1897; 5—C. globosa (Sars, 1863); 6—C. laevis (O.F. Müller, 1776); 7– C. mediosetosa Meisch, 1987; 8—C. modesta (Herrick, 1887); 9—C. nahcotta Dobbin, 1941; 10—C. ovum (Jurine, 1820); 11—C. pusilla Sars, 1895; 12—C. scrobiculata Klie, 1936; 13—C. serena (Koch, 1838); 14—C. sharpei Furtos, 1933; 15—C. vinyardi Külköylüoĝlu, 2008. Note: C. laevis and C. ovum are distributed in the entire Holarctic and the dotted line is only approximate distribution of the two species.

FIGURE 4. Cypria karamani Petkovski, 1976: SEM-image, dorso/lateral view.

FIGURE 5. A–D, Cypria maculata Hoff, 1942, A, C holotype (♀, SMNH 81083), B, D allotype (♂, SMNH 81084); E-F, C. palustera Furtos, 1935, paratype (♂, SMNH 71410); G-I, Cypria spinifera Tressler, 1937, type (♀, SMNH 71504): A—LV, interior view; B—UR of ♂; C—UR and genital field of ♀: D, E—hemipenis (arrow on E showing well sclerotized parts); F, G—T2; H—UR and genital field of ♀; I—RV, interior view. Scales = 0.1 mm.

FIGURE 12. Keysercypria affinis (Klie, 1933). A-E, K—paralectotype ♀ (ZMH 538b); F-J—lectotype ♂ (ZMH 538a) A— Two terminal segments of A2; B—UR; C—LV: D—RV; E—carapace, dorsal view; F—distal four segments of A1; G—UR; H—proximal part of A1, not all setae drawn; I—Mxl-palp; J—right prehensile palp; K—terminal segment and claw of T2. Scales = 0.1 mm. C-D modified after Klie (1933), and not to scale.

FIGURE 13. Keysercypria affinis (Klie, 1933). Lectotype ♂ (ZMH 538a): A—T3; B—T2 without terminal segment: C—basal and first endopodal segments of A2; D—right prehensile palp; E—penultimate and terminal segments of A2; F—hemipenis, only outline; G—terminal segment and terminal claw of T2. Scales = 0.1 mm.