Gnypeta : Casey 1906

Key to Gnypeta species occurring in Canada, Alaska and Greenland

1. Basal article of metatarsus longer than two following articles combined......2

– Basal article of metatarsus at most as long as two following articles combined (Fig. 1)........................................................................................................3

2. Antennal articles 8-10 strongly transverse (Figs 27 a, b); median lobe of aedeagus with narrowly triangular apical part in lateral view (Fig. 91), and bulbus with two lateral projections in dorsal view (Fig. 92); spermatheca with capsule pitcher-shaped (Fig. 96); female sternite 8 rounded apically (Fig. 98).................................................................................... G. brevicornis Casey

– Antennal articles 8-10 quadrate or slightly elongate (Figs 32 a, b); median lobe of aedeagus with broadly triangular apical part in lateral view (Fig. 130); spermatheca C-shaped, capsule mushroom-formed (Fig. 136); female sternite 8 emarginate apically (Fig. 138)...................................... G. uteana (Casey)

3. Body broad and robust (Fig. 8), pronotum at base about as broad as elytra (Fig. 8), abdomen swollen medially and at base as broad as elytra (Fig. 8); median lobe of aedeagus and spermatheca as illustrated (Figs 83, 84, 88).................................................................................... G. groenlandica Lohse

– Body narrow and less robust (Figs 3, 5, 6, 9, 14, 15), pronotum at base narrower than elytra, abdomen subparallel and at base narrower than elytra (Figs 3, 7, 9-15); genitalia differently shaped.......................................................4

4. Elytra at suture approximately as long as pronotum (Figs 3, 6, 7, 10, 15-19)................................................................................................................... 5

– Elytra at suture distinctly longer than pronotum (Figs 4, 5, 11-13, 20).... 13

5. Antennal articles 7-10 strongly transverse (Figs 21 a, b); median lobe of aedeagus and spermatheca as illustrated (Figs 39, 40, 41, 45).............. G. ashei sp. nov.

– Antennal articles 7-10 elongate, subquadrate or slightly transverse (Figs 23-25 a, b, 28 a, b, 31 b, 33-37 a, b); genitalia differently shaped (Figs 75, 76, 80, 99-101, 105, 139-141, 145, 148, 149, 153, 156, 157, 161, 164, 165, 169, 172-174, 178).....6

6. Antennal articles 7-10 slightly transverse (Figs 24 a, b, 25 a, b, 33 a, b); female sternite 8 without deep median emargination (Figs 74, 82, 147)........ 7

– Antennal articles 7-10 elongate or subquadrate (Figs 28 a, b, 34-37 a, b); female sternite 8, except for G. caerulea, with deep apical emargination (Figs 107, 155, 163, 171, 180)............................................................................ 9

7. Body length 3.0-3.4 mm; median lobe of the aedeagus with apical part narrowly produced (Fig. 66); spermatheca with capsule funnel-shaped and as wide as long (Fig. 72).................................................. G. sellmani Brundin

– Body length 2.5-3.0 mm; median lobe of aedeagus and spermatheca differently shaped (Figs 75, 76, 80, 139-141, 145).............................................. 8

8. Body length 2.5-2.7 mm; male tergite 8 with four apical dents on apical margin (Fig. 78); spermatheca with capsule funnel-shaped (Fig. 80); median lobe of aedeagus with apical part narrowly triangular with sinuate margins (Fig. 75)......................................................................... G. dentata sp. nov.

– Body length 2.7-3.0 mm; male tergite 8 without teeth and with minute median emargination on apical margin (Fig. 143); spermatheca with apical part of capsule approximately spherical (Fig. 145); median lobe of aedeagus with apical part moderately narrowly triangular, narrowly bottle-shaped (Fig. 139)...................................................... G. carbonaria (Mannerheim)

9. Integument moderately glossy with minute pubescence (Figs 18, 19); basal three tergal impressions virtually impunctate except for the margins of tergites (Figs 1, 18, 19); body length 2.4-3.0 mm; genitalia as in Figs 164, 165, 169, 172-174, 178...........................................................................10

– Integument strongly glossy with pubescence moderately long (Figs 10, 16, 17); basal three tergal impressions with dispersed punctation (Figs 10, 16, 17); body length 2.7-3.5 mm; genitalia as illustrated (Figs 99-101, 105, 148, 149, 153, 156, 157, 161)..........................................................................11

10. Pronotum and abdomen at base distinctly narrower than elytra (Fig. 18); first three visible tergal impressions lacking coarse punctation except for the posterior margin (Fig. 1); median lobe of aedeagus with tubus swollen laterally (Fig. 164), spermatheca club-shaped (Fig. 169)......... G. nigrella (LeConte)

– Pronotum and abdomen at base slightly narrower than elytra (Fig. 19); first three visible tergal impressions with dispersed coarse punctation; genital structures differently shaped (Figs 172-174, 178)..... G. saccharina sp. nov.

11. Body length 3.0-3.5 mm; genitalia as illustrated (Figs 99-101, 105)............................................................................................ G. caerulea (Sahlberg)

– Body length 2.5-3.0 mm; genitalia differently shaped (Figs 148, 149, 153, 156, 157, 161).......................................................................................... 12

12. Median lobe of aedeagus with moderately broad and slightly produced ventrally apical part (Fig. 148); spermatheca with thin stem (Fig. 153); western Canada............................................................................. G. helenae Casey

– Median lobe of aedeagus narrowly triangular and strongly produced ventrally (Fig. 156); spermatheca with moderately wide stem (Fig. 161); eastern Canada..................................................................... G. canadensis sp. nov.

13. Antennal articles 7-10 strongly elongate (Figs 23 a, b); median lobe of aedeagus and spermatheca as illustrated (Figs 57-59, 63)....... G. atrolucens Casey

– Antennal articles 7-10 subquadrate to transverse (Figs 22 a, b, 29-31 a, b, 38 a, b); genital structures differently shaped (Figs 48-50, 54, 108-110, 114, 117, 118, 122, 127-129, 181-182, 186, 187)...........................................14

14. Abdomen broad, at base approximately as broad as elytra (Figs 11, 13); genital structures as illustrated (Figs 108-110, 114, 127-129)..........................15

– Abdomen moderately broad, at base distinctly narrower than elytra (Figs 4, 12, 20); genital structures differently shaped (Figs 48-50, 54, 117, 118, 122, 181, 182, 186, 187).................................................................................16

15. Antennal articles 7-10 subquadrate (Fig. 31 b); spermatheca C-shaped (Figs 127-129)..................................................................... G. manitobae Casey

– Antennal articles 7-10 transverse (Figs 29 a, b); spermatheca S-shaped (Fig. 114).......................................................................... G. lohsei sp. nov.

16. Pronotum almost as wide as elytra (Fig. 20); punctures in abdominal impressions very coarse (Fig. 20); abdomen strongly narrowed at base (Fig. 20); genital structures as illustrated (Figs 181, 182, 186, 187)..................................................................................................................... G. minuta sp. nov.

– Pronotum distinctly narrower than elytra (Figs 4, 12); punctures in abdominal impressions fine or moderately coarse (Figs 4, 12); genital structures differently shaped (Figs 48-50, 54, 117, 118, 122)........................................17

17. Body small, length 2.7-3.0 mm (Fig. 12); median lobe of aedeagus with apical part narrowly produced ventrally (Fig. 117); spermatheca C-shaped, tubular (Fig. 122).................................................. G. crebrepunctata (Casey)

– Body large, length 3.2-3.6 mm (Fig. 4); median lobe of aedeagus with apical part broadly triangular in lateral view (Fig. 48); spermatheca with funnel-shaped capsule and thin and sinuate stem (Fig. 54)................................................................................................................. G. brincki Palm