Cryptotendipes

Epler, J. H., 2018, The genus Cryptotendipes Beck et Beck in Florida, with the description of a new species (Diptera: Chironomidae: Chironominae), Zootaxa 4433 (3), pp. 583-594 : 593

Key to the adult males, pupae and fourth instar larvae of Florida Cryptotendipes

1 Adult males.......................................................................................... 2

1’ Pupae or larvae....................................................................................... 4

2(1) Inner margin of gonostylus sharply incised after proximal ½ ( Townes 1945: Fig. 185; Saether 1977: fig. 34A).................................................................................................. C. emorsus (Townes) ( C. casuarius (Townes) , not known from Florida, will key here but is separated by the high, casque-like ridge on T IX. See Townes 1945: Figs. 186A, 186B; Saether 1977: Figs. 34B, 34C, 34D; and Fig. 1 in the present paper.)

2’ Inner margin of gonostylus more smoothly curved............................................................ 3

3(2’) Anal point longer, extending past mid-point of gonostylus; inner margin of gonostylus more smoothly curved ( Saether 1977: Fig. 34F; Pinder 1978: Fig. 150D)................................................. C. pseudotener (Goetghebuer)

3’ Anal point shorter, barely extending to mid-length of gonostylus; gonostylus more swollen basally (Fig. 8).................................................................................................. C. rutteri Epler , sp. n.

4(1’) Pupae............................................................................................... 5

4’ Larvae............................................................................................. 7

5(4) Anal lobe with apical taeniae subequal to basal taeniae (Fig. 15)......................... C. pseudotener (Goetghebuer)

5’ Anal lobe taeniae becoming obviously larger and darker posteriorly (Fig. 16)...................................... 6

6(5’) S VIII with circular mound of posterior hooklets (Fig. 16).................................... C. rutteri Epler , sp. n.

6’ S VIII without circular mound of posterior hooklets ( Saether 2010: Fig. 4B)....................... C. emorsus (Townes)

7(4’) Penultimate lateral tooth of mentum scarcely larger than antepenultimate tooth (Fig. 21)...... C. pseudotener (Goetghebuer)

7’ Penultimate lateral tooth of mentum much larger than antepenultimate tooth (Figs. 20, 22)............................ 8

8(7’) Fourth instar larvae only: postmentum length 118–130, mean 125 µm............................ C. emorsus (Townes)

8’ Fourth instar larvae only: postmentum length 160–168 µm.................................... C. rutteri Epler , sp. n.