Polypedilum

Oyewo, Emmanuel Adeoye & Saether, Ole A., 2008, Revision of Polypedilum (Pentapedilum) Kieffer and Ainuyusurika Sasa et Shirasaki (Diptera: Chironomidae), Zootaxa 1953, pp. 1-145 : 34

Key to known larvae of Polypedilum subgenus Pentapedilum

1. Mandible without dorsal tooth, with 3 inner teeth ..................................................................................... 2

- Mandible with single dorsal tooth.............................................................................................................. 5

2. Mentum with first lateral teeth and median teeth subequal, forming a straight row between longer second lateral teeth ( Fig. 17F–J) ........................................................................ P. (Pe.) epleri Oyewo et Jacobsen

- Mentum with median teeth at least slightly higher than first lateral teeth ................................................. 3

3. Premandible with 4–5 teeth; ventromental plate with rounded posterolateral corner, with distinct striations only medially ..................................................................................................... P. (Pe.) leei Freeman

- Premandible with 2 apical teeth; ventromental plate with pointed posterolateral corner, with distinct striations .......................................................................................................................................................... 4

4. Mentum with median teeth and second lateral tooth much higher and wider than minute first lateral tooth; ventromental plate broad, fan-shaped; third antennal segment significantly shorter than fourth. .... ........................................................................................................................... P. (Pe.) kasumiense (Sasa)

- Mentum with median teeth only slightly higher than first lateral teeth; ventromental plate medially broad and laterally narrow; third antennal segment subequal in length to fourth ( Fig. 34H–L). .......................... .................................................................................................................... P. (Pe.) sordens (van der Wulp)

5. Mentum with median teeth either slightly longer or subequal to second lateral teeth............................... 6

- Mentum with median teeth shorter than second lateral tooth .................................................................... 9

6. Third antennal segment either of the same length or slightly shorter than fourth ..................................... 7

- Third antennal segment slightly longer than fourth ................................................................................... 8

7. Combined length of third and fourth antennal segments subequal to or shorter than second; Lauterborn organs vestigial or absent ............................................................................... P. (Pe.) convexum Johannsen

- Combined length of third and fourth antennal segments longer than second; Lauterborn organs minute ( Fig. 41) .................................................................................................. P. (Pe.) uncinatum (Goetghebuer)