Physocypria Vávra, 1897

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 : 45

Key to species of the genus Physocypria Vávra, 1897

1 Valves with beak-like extension on the antero-ventral margin............................... P. perlonga ( Rome, 1962)

- No beak-like extension present........................................................................... 2

2 Valves asymmetrical in lateral view; RV overlapping LV dorsally............................................... 3

- Valves slightly asymmetrical in lateral view; RV same or lower than LV in dorsal view.............................. 5

3 Posterior seta on the UR absent.................................................... P. lenticularis ( Müller, 1898)

- Posterior seta on the UR present......................................................................... 4

4 Lobe “b” on the hemipenis with long and thin neck ending in a beak-like process................. P. bullata Vávra, 1897

- Lobe “b” on the hemipenis with short neck and not ending in a beak-like process............. P. denticulata ( Daday, 1910)

5 In lateral view, dorsal margin evenly rounded or flat, anterior and posterior margins equally wide...................... 6

- In lateral view, dorsal margin not evenly rounded (inclined more towards anterior or posterior end), and posterior margin clearly more narrow than anterior one, or posterior margin straight with posterior and ventral margin merging almost at the right angle.......................................................................................... 11

6 Dorsal margin flat..................................................................................... 7

- Dorsal margin rounded................................................................................. 9

7 Left valve with tubercles............................................................. P. armata ( Müller, 1898)

- Left valve without tubercles............................................................................. 8

8 Left prehensile palp with developed subterminal structures, lobe “b” on the hemipenis only slightly shorter than lobe “a” and curved at the top................................................................. P. tumidosa ( Rome, 1962)

- Left prehensile palp without developed subterminal structures, lobe “b” considerably shorter than lobe “a” and not curved at the top.............................................................................. P. lata ( Rome, 1962)

9 Posterior seta on the UR only reaching distal margin of the ramus............................. P. capensis ( Sars, 1895)

- Posterior seta on the UR by far exceeding distal margin of the ramus........................................... 10

10 Carapace tumid in lateral view........................................................ P. limnalis ( Rome, 1965)

- Carapace more elongated in lateral view.......................... P. castanea ( Brady, 1904) and P.obtusa ( Sars, 1910)

11 Posterior seta on the UR very short...................................................................... 12

- Posterior seta on the UR long (by far exceeding distal margin of the ramus)...................................... 15

12 Posterior end of carapace elongated and posterior margin very narrow......................... P. declivis ( Sars, 1910)

- Posterior end of carapace not elongated and posterior margin not so narrow...................................... 13

13 Terminal segment of Md palp at least 3 times longer than wide................................. P. opaca ( Sars, 1910)

- Terminal segment of Md palp only 1.5 times longer than wide................................................. 14

14 In lateral view postero-dorsal margin inclined and posterior end slightly protruding............... P. stricta ( Rome, 1962)

- In lateral view postero-dorsal margin rounded and posterior end not protruding................. P. parvula ( Rome, 1962)

15 Antero-ventral margin rounded......................................................................... 16

- Antero-ventral margin square....................................................... P. subangulata ( Sars, 1910)

16 In lateral view posterior margin elongated and much narrower than anterior one............... P. complanata ( Sars, 1910)

- In lateral view posterior margin not elongated.............................................................. 17

17 Greatest H in the middle, marked with a clear angle on dorsal margin, posterior margin rounded...... P. ovata ( Rome, 1962)

- Greatest H not marked with a clear angle on dorsal margin, posterior margin almost straight......................... 18

18 Setae h1 and h2 on the terminal segment of T3 equal in size.................................. P. deflexa ( Sars, 1910)

- Seta h1 shorter than h2............................................................. P. emaciata ( Rome, 1962)