Keysercypria deformis Karanovic 2011
Creators: name: Karanovic, Ivana
Publisher: name: Zenodo
Year: 2011
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Ostracoda
Podocopida
Candonidae
Keysercypria
Keysercypria deformis

description: Keysercypria deformis (Klie, 1940)   
(Figures 14, 16A, B)  
 1940 Physocypria deformis Klie: p. 221, Figs 1–11.   
 Redescription. Male: Carapace ovoid in lateral view, with dorsal margin almost evenly rounded. Anterior selvage very prominent on LV. LV overlapping RV on all free margins. RV with marginal tubercles along free margin.   
A1 (Figure 16A): 7-segmented. First segment with one seta anteriorly and two setae posteriorly. Second segment with one anterior seta, which is plumose and not reaching mid length of following segment. Third segment with one anterior seta, not reaching distal end of following segment. Fourth segment with one posterior seta, reaching distal margin of penultimate segment, and two long anterior setae. Fifth segment with two long anterior setae and two short posterior setae, both claw-like. Penultimate segment with three anterior setae (one dorsal—alpha seta, and two ventral setae) and two long posterior setae. 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 14B): Exopod consisting of plate, one long and two short setae. First endopodal segment with one ventral seta and a 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, 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: proximal, short part with y3 distally, and distal long part (twice as long as proximal one) with Gm and GM claws. Aesthetasc Y very short.  
Prehensile palps (Figures 14C, D): Right palp (Figure 14C) much more robust than left one (Figure 14D), finger with a rounded dorsal part, one terminal seta broad and well sclerified, other short and thin. Left palp with thin finger and one terminal seta clearly distinguishable on the slide.  
T1 (Figure 14A): Basal seta missing. Seta “e” reaching mid L of terminal claw, seta “f” reaching distal end of penultimate segment. Seta h3 on terminal segment very long, whip-like. Terminal claw poorly serrated and as long as three distal segments combined. T2 covered with long and dense pseudochaetae, setae “e” and “f” plumose.  
UR (Figure 14F): L ratios between anterior margin, anterior, and posterior claw equaling 2.5: 1.5: 1. Posterior seta not reaching distal margin of UR and inserted slightly more proximally on posterior margin. Anterior claw prominently curved, almost loop-like.  
Hemipenis (Figure 14E): Lobe “a” distally rounded, lobe “b” thin, narrowing distally. Both lobes approximately of same H. Internal structure impossible to be observed in the original dissection.  
Zenker organ: Consisting of seven whorls of spines.  
Female: Carapace similar to that of male (Figure 14G–I).  
UR (Figure 16B): L ratios of anterior margin, anterior and posterior claw 1.9: 1.3: 1. Posterior seta not reaching distal margin of UR. Genital field with small triangular extension.  
 Remarks and affinities. Sexual difference in the L of “h3” seta on T2 noticed in K. affinis (Klie, 1933) has also been observed in Keysercypria deformis (Klie, 1940). These two species are indeed very closely related and their mutual difference has already been discussed under the previous species. Keysercypria deformis differs from K. obtusa (Klie, 1940), K. pellucida (Sars, 1901) and K. circinata (Würdig & Pinto, 1993) by clearly developed marginal tubercles on the RV. Keysercypria xanabanica (Furtos, 1936) is also very closely related to K. deformis, and in fact, the only difference which could be observed based on the description of K. xanabanica, is a specific curvature of the anterior claw of the UR in K. deformis. The hemipenis drawn by Klie (1940) is very different from the one I have observed, which is in fact very similar to K. xanabanica. Also, the prehensile palps are very similar. Unfortunately, Furtos (1936a) did not provide a description of the T2, so the L of “h3” seta in K. xanabanica is unknown.
description: Published as part of Karanovic, Ivana, 2011, On the recent Cyclocypridinae (Podocopida, Candonidae) with description of two new genera and one new species 2820, pp. 1-61 in Zootaxa 2820 (1) on page 29, DOI: 10.11646/zootaxa.2820.1.1, http://zenodo.org/record/5288957