Philodina Ehrenberg 1830
Creators: name: Song, Min Ok
name: Lee, Chang-Ho
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Animalia
Rotifera
Eurotatoria
Bdelloidea
Philodinidae
Philodina

description: Key to the Korean species of genus Philodina
1. Cerebral eye spots absent.............................................................................. 2
- Cerebral eye spots present............................................................................. 16
2. Dorsal toe pair always extended; toes thick, plump and with pointed tips............................... P. duplicalcar
- Dorsal toe pair not always extended; toes otherwise.......................................................... 3
3. Two pairs of spurs; trochal discs almost adjoined...................................................... P. scabra
- One pair of spurs; trochal discs with space between them..................................................... 4
4. Trunk with coarse and dense granules..................................................................... 5
- Trunk smooth........................................................................................ 6
5. First trunk pseudosegment with a shield-shaped sculptured area dorsally; without wart-shaped hemispherical processes on trunk.................................................................................. P. cylpeata n. sp.
- First trunk pseudosegment otherwise; wart-shaped hemispherical processes on trunk dorsally and laterally.................................................................................................... P. verrucosa n. sp.
6. First foot pseudosegment with two small projections.................................................... P. childi
- First food pseudosegment without any projections........................................................... 7
7. Dental formula 4/4 – 5/5........................................................................ P. grandis
- Dental formula 2/2 – 3/3............................................................................... 8
8. Trochal discs inclined toward sulcus; upper lip trilobed medially; spurs thin, long and pointed................... P. lepta
- Trochal discs and upper lip otherwise; spurs otherwise....................................................... 9
9. Spur pseudosegment around spur base inflated and bilobed........................................... P. tumidipes
- Spur pseudosegment around spur base otherwise........................................................... 10
10. Interspace between spurs narrower than spur base width..................................................... 11
- Interspace between spurs much wider than spur base width................................................... 12
11. Sulcus as wide as trochal disc width; median lobe of upper lip wide and low; median lobe with two or three projections; pseudosegments in rump with expansion posteriorly....................................................... P. rapida
- Sulcus much narrower than trochal disc width; median lobe of upper lip narrow and high; median lobe with two lobes; pseudosegments in rump without expansion posteriorly..................................................... P. plena
12. Interspace between spurs 2–3 times as wide as spur base width................................................ 13
- Interspace between spurs as wide as or much wider than 4 times of spur base width............................... 14
13. Foot about 1/4 of total body length in creeping........................................................ P. vorax
- Foot about 1/7–1/9 of total body length in creeping................................................ P. triangularis
14. Upper lip bilobed medially; disc retractor U-shaped and bilobed medially....................................... 15
- Upper lip arched; disc retractor slightly convex and trilobed medially.................................... P. koreana
15. Spur longer than spur base width; interspace between spurs much wider than 4 times of spur base width........ P. proterva
- Spur as long as spur base width; interspace between spurs as wide as 4 times of spur base width............ P. parvicalcar
16. Trunk highly granulated.............................................................................. 17
- Trunk smooth....................................................................................... 18
17. First foot pseudosegment with transverse ridge dorsally; spurs longer than width of interspace.......... P. rugosa coriacea
- First foot pseudosegment without any process; spurs short and incurved; interspace about 3.5–4 times as wide as spur base width............................................................................... Philodina corrugata
18. Dorsal toe pair always extended a little or fully; upper lip concave medially...................... P. acuticornis odiosa
- Dorsal toe pair otherwise.............................................................................. 19
19. Spurs thumb-shaped and with small knob or sharp points at ends....................................... P. flaviceps
- Spurs conical, thin and long........................................................................... 20
20. Corona much wider than cingulum; upper lip arched.................................................. P. roseola
- Corona slightly wider than cingulum; upper lip bilobed medially and with a wide depression between lobes.... P. tranquilla
description: Published as part of Song, Min Ok & Lee, Chang-Ho, 2020, Descriptions of two new species of Philodina (Rotifera, Bdelloidea), with notes on seven rare bdelloids from Korea, pp. 253-276 in Zootaxa 4772 (2) on page 268, DOI: 10.11646/zootaxa.4772.2.2, http://zenodo.org/record/3816500