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

description: Keysercypria longiseta (Klie, 1930)   
(Figure 15)  
 1930 Physocypria longiseta Klie: p. 222, Figs 1–9.   
 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 (Figure 15G–I).   
A1 (Figure 15B): 7-segmented. First segment with one seta anteriorly and two setae posteriorly. Second segment with one anterior seta, plumose and not reaching mid length of following segment. Third segment with one anterior and one posterior seta, both being short and only reaching distal end of the following segment. Fourth segment with two posterior setae, one exceeding distal margin of penultimate segment, other not reaching distal end of following segment, and two long anterior setae. Fifth segment with two long anterior setae and two short posterior setae. Penultimate segment with three anterior setae (one dorsal—alpha seta, and two ventral setae) and two 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 15A): 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 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 15E, F): Right palp (Figure 15E) much more robust than left one (Figure 15F), finger with a little horn-shaped process dorsally, one terminal seta broad and well sclerified, other short and thin. Left palp with thin finger and one terminal setae distinguishable on the slide.  
T2 (Figure 15D): Basal seta missing. Setae “e” and “f” reaching distal end of following segments. Seta “h3” on terminal segment almost reaching half the L 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.  
Hemipenis (Figure 15C): Lobe “a” distally rounded, lobe “b” pointed. Both lobes of same H.  
Zenker organ: Consisting of seven whorls of spines.  
 Remarks and affinities. Keysercypria longiseta (Klie, 1930) is closely related to K. affinis (Klie, 1933), K. xanabanica (Furtos, 1936), K. deformis (Klie, 1940), and K. sanctaeannae (Margalef, 1961) as it has tubercles along the free margin on the RV. The other three species of the genus do not have those tubercles well developed. It differs from K. xanabanica and K. deformis by a much longer posterior seta on the UR, and from both K. deformis and K. affinis by a presence of a horn-shaped process on the dorsal margin of the right prehensile palp and the presence of a short “h3” seta on the T2. Keysercypria sanctaeannae apparently misses the lobe “a” on the hemipenis, which is in fact the only difference between the two species. However, this feature is dubious, and it may be that the lobe was just folded and not observable on the slide. If this is the case, there is no doubt that K. sanctaeannae is only a junior synonym of K. longiseta, especially as the appearance of other soft parts (including the typical hornshaped process on the dorsal margin of the right prehensile palp) and carapace are identical in the two species.
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 33, DOI: 10.11646/zootaxa.2820.1.1, http://zenodo.org/record/5288957