Gnypeta, : Casey, 1906

Klimaszewski, Jan, Savard, Karine, Pelletier, Georges & Webster, Reginald, 2008, Species review of the genus Gnypeta Thomson from Canada, Alaska and Greenland (Coleoptera, Staphylinidae, Aleocharinae): systematics, bionomics and distribution, ZooKeys 2 (2), pp. 11-84 : 25-27

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

Figures

Fig. 1. Gnypeta nigrella (LeConte), in dorsal view. Scale = 1 mm.

Figs 21-38. Antennae of Gnypeta species: G. ashei: 21a. male, 21b. female; G. brincki: 22a. male, 22b. female; G. atrolucens: 23a. male, 23b. female; G. sellmani: 24a. male, 24b. female; G. dentata: 25a. male, 25b. female; G. groenlandica: 26a. male, 26b. female: G. brevicornis: 27a. male, 27b. female; G. caerulea: 28a. male, 28b. female; G. lohsei: 29a. male, 29b. female; G. crebrepunctata: 30a. male, 30b. female; G. manitobae: 31b. female; G. uteana: 32a. male, 32b. female; G. carbonaria: 33a. male, 33b. female; G. helenae: 34a. male, 34b. female; G. canadensis: 35a. male, 35b. female; G. nigrella: 36a. male, 36b. female; G. saccharina: 37a. male, 37b. female; G. minuta: 38a. male, 38b. female. Scale = 1 mm

Figs 130-138. Genital structures of Gnypeta uteana: 130, median lobe of the aedeagus in lateral view, 131, dorsal view, 132, ventral view; 133, paramere; 134, male tergite 8; 135, male sternite 8; 136, spermatheca; 137, female tergite 8; 138, female sternite 8.

Figs 3-8. Gnypeta species: 3, G. ashei; 4, G. brincki; 5, G. atrolucens; 6, G. sellmani: 7, G. dentata; and 8, G. groenlandica. Scale = 1 mm

Figs 83-90. Genital structures of Gnypeta groenlandica: 83, median lobe of the aedeagus in lateral view, 84, dorsal view; 85, paramere; 86, male tergite 8; 87, male sternite 8; 88, spermatheca; 89, female tergite 8; 90, female sternite 8.

Figs 9-14. Gnypeta species: 9, G. brevicornis; 10, G. caerulea; 11, G. lohsei; 12, G. crebrepunctata; 13, G. manitobae [apical part of abdomen removed]; 14, G. uteana. Scale = 1 mm

Figs 15-20. Gnypeta species: 15, G. carbonaria; 16, G. helenae; 17, G. canadensis; 18, G. nigrella; 19, G. saccharina; and 20, G. minuta [18-20, apical part of abdomen removed]. Scale = 1 mm

Figs 39-47. Genital structures of Gnypeta ashei: 39, median lobe of the aedeagus in lateral view, 40, dorsal view, 41, ventral view; 42, paramere; 43, male tergite 8; 44, male sternite 8; 45, spermatheca; 46, female tergite 8; 47, female sternite 8.

Figs 75-82. Genital structures of Gnypeta dentata: 75, median lobe of the aedeagus in lateral view, 76, dorsal view; 77, paramere; 78, male tergite 8; 79, male sternite 8; 80, spermatheca; 81, female tergite 8; 82, female sternite 8.

Figs 99-107. Genital structures of Gnypeta brincki: 99, median lobe of the aedeagus in lateral view, 100, dorsal view, 101, apical part of median lobe in ventral view; 102, paramere; 103, male tergite 8; 104, male sternite 8; 105, spermatheca; 106, female tergite 8; 107, female sternite 8.

Figs 66-74. Genital structures of Gnypeta sellmani: 66, median lobe of the aedeagus in lateral view, 67, dorsal view, 68, apical part of median lobe in ventral view; 69, paramere; 70, male tergite 8; 71, male sternite 8; 72, spermatheca; 73, female tergite 8; 74, female sternite 8.

Figs 139-147. Genital structures of Gnypeta brincki: 139, median lobe of the aedeagus in lateral view, 140, dorsal view, 141, apical part of median lobe in ventral view; 142, paramere; 143, male tergite 8; 144, male sternite 8; 145, spermatheca; 146, female tergite 8; 147, female sternite 8.

Figs 164-171. Genital structures of Gnypeta nigrella: 164, median lobe of the aedeagus in lateral view, 165, dorsal view; 166, paramere; 167, male tergite 8; 168, male sternite 8; 169, spermatheca; 170, female tergite 8; 171, female sternite 8.

Figs 172-180. Genital structures of Gnypeta saccharina: 172, median lobe of the aedeagus in lateral view, 173, dorsal view, 174, apical part of median lobe in ventral view; 175, paramere; 176, male tergite 8; 177, male sternite 8; 178, spermatheca; 179, female tergite 8; 180, female sternite 8.

Figs 148-155. Genital structures of Gnypeta helenae: 148, median lobe of the aedeagus in lateral view, 149, dorsal view; 150, paramere; 151, male tergite 8; 152, male sternite 8; 153, spermatheca; 154, female tergite 8; 155, female sternite 8.

Figs 57-65. Genital structures of Gnypeta atrolucens: 57, median lobe of the aedeagus in lateral view, 58, dorsal view, 59, apical part of median lobe in ventral view; 60, paramere; 61, male tergite 8; 62, male sternite 8; 63, spermatheca; 64, female tergite 8; 65, female sternite 8.

Figs 48-56. Genital structures of Gnypeta brincki: 48, median lobe of the aedeagus in lateral view, 49, dorsal view, 50, apical part of median lobe in ventral view; 51, paramere; 52, male tergite 8; 53, male sternite 8; 54, spermatheca; 55, female tergite 8; 56, female sternite 8.

Figs 108-116. Genital structures of Gnypeta lohsei: 108, median lobe of the aedeagus in lateral view, 109, dorsal view, 110, apical part of median lobe in ventral view; 111, paramere; 112, male tergite 8; 113, male sternite 8; 114, spermatheca; 115, female tergite 8; 116, female sternite 8.

Figs 117-124. Genital structures of Gnypeta crebrepunctata: 117, median lobe of the aedeagus in lateral view, 118, dorsal view; 119, paramere; 120, male tergite 8; 121, male sternite 8; 122, spermatheca; 123, female tergite 8; 124, female sternite 8.

Figs 125-129. Genital structures of Gnypeta manitobae (lectotype): 125, female tergite 8; 126, female sternite 8; 127-129, spermatheca.

Figs 181-189. Genital structures of Gnypeta minuta: 181, median lobe of the aedeagus in lateral view, 182, dorsal view; 183, paramere; 184, male tergite 8; 185, male sternite 8; 186, 187, spermatheca; 188, female tergite 8; 189, female sternite 8.