Cryptotendipes Lenz

Yan, Chuncai, Tang, Hongqu & Wang, Xinhua, 2005, A review of the genus Cryptotendipes Lenz (Diptera: Chironomidae) from China, Zootaxa 1086, pp. 1-24 : 21-22

Key to known larvae of Cryptotendipes Lenz

1. Mentum with simple broad, flat, round median tooth; outer 3 teeth indistinctly set off from others; marine ......................................................... C. acalcar Reiss (Palaearctic)

­ Mentum with trifid median tooth, lateral notch distinct or fused. If only 1 simple median tooth, then barely projecting. Last 2 or 3 laterals composing enlarge, compound tooth.................................................................................................................... 2

2. Mentum with 1 predominant higher median tooth, 4 lateral teeth in addition to outer 3 teeth. Ventromental plate relatively small..................................................................... 3

­ Mentum with trifid median tooth or at least with notch rudiments on each side. Outer 3 lateral teeth distinctly set off ......................................................................................... 4

3. Without distinct enlarged outer compound tooth ............................................................

...................................................................... C. pseudotener (Goetghebuer) (Holarctic) ­ With distinct enlarged outer compound tooth ................................................................. ........................................... C. emorsus (Townes) sensu Beck & Beck, 1969 (Nearctic)

4. Pecten epipharyngis usually with 2 teeth .......................................C. sp. 3 (Palaearctic)

­ Pecten epipharyngis usually with 3 teeth ...................................................................... 5

5. Seta subdentalis relatively short, at most reaching apex of first inner tooth................. 6

­ Seta subdentalis long, extending beyond all inner teeth ............................................... 7

6. Labral sclerites 1 and 2 present. Two inner mandible teeth flat; third antennal segment longer than fourth .................................................... C. usmaensis (Pagast) (Palaearctic)

­ Labral sclerites 1 and 2 fused. Two inner mandible teeth clearly pointed; third antennal segment shorter than fourth, at most half as long as fourth segment .............................. ........................................................................................................C. sp. 4 (Palaearctic)

7. Inner teeth of mandible pointed.Posterior occipital margin pigmented only in median part ............................................................................................................ C. sp. 2 (Oriental)

­ Inner teeth of mandible flat. Posterior occipital margin entirely dark .......................... 8

8. Nearctic ......................................................................................... C. emorsus (Townes)

­ Palaearctic ........................................................................................................... C. sp. 1