Gyrophaenina, Kraatz, 1856

Klimaszewski, Jan, Webster, Reginald & Savard, Karine, 2009, Review of the rove beetle species of the subtribe Gyrophaenina Kraatz (Coleoptera, Staphylinidae) from New Brunswick, Canada: new species, provincial records and bionomic information, ZooKeys 22 (22), pp. 81-170 : 90-93

Key to New Brunswick species of Gyrophaenina

(Note: male genitalia offer excellent and ultimate diagnostic characteristics for most

species identification)

1. Body usually bicoloured, flavate to brown, often with strongly contrasting areas (Figs 4–24); pronotum at most two-thirds wider than long; antennae moderately broadening apically, 5 th article not conspicuously broader than 4 th, mesosternal process longer than metasternal process, its apex not margined (subgenus Gyrophaena )................................................................... 6

- Body approximately uniformly dark brown (Figs 25–30); pronotum from slightly transverse (Figs 1, 27, 28) to approximately twice as wide as long (Figs 25, 26, 29, 30); antennae incrassate and often forming loose club, 5 th article conspicuously broader than 4 th; mesosternal process longer than metasternal process or approximately of the same length, its apex margined ................. 2

2(1). Postocular area of head short, sides strongly converging posteriorly (Figs 29, 30); pronotum approximately twice as wide as long; mesosternal and metasternal processes of approximately the same length (genus Eumicrota ) .............. 3

- Postocular area of head moderately to strongly elongate, sides subparallel or moderately converging posteriorly (Figs 1, 25–28); pronotum less than twice as wide as long (Figs 1, 25–28); mesosternal process longer than metasternal process (Fig. 2) (subgenus Phaenogyra )..................................................... 4

3(2). Pronotum moderately transverse, broadest in its basal fourth, sides strongly converging apically (Fig. 29); male tergite 8 truncate apically and with small median lobe of variable size (Fig. 194); female tergite 8 truncate apically (Fig. 197); median lobe of aedeagus as illustrated (Fig. 192) ....... E. corruscula (Erichson)

- Pronotum strongly transverse, broadest at the middle, sides moderately converging apically (Fig. 30); male and female tergite 8 emarginate apically and with two large lobes (Figs 201, 204); median lobe of aedeagus as illustrated (Fig. 199)....................................................................... E. socia (Erichson)

4(2). Postocular area of head strongly elongate and subparallel (Figs 1, 3, 28); pronotum narrow and slightly transverse (Fig. 1); abdomen broad, its maximum width greater than that of elytra (Fig. 1); genital structures as illustrated (Figs 184–191)................................................................. G. (P.) gracilis Seevers

- Postocular area of head moderately elongate and narrowed posteriorly (Figs 25, 26); pronotum broad and strongly transverse (Figs 25, 26); abdomen moderately broad, its maximum width approximately that of elytra (Figs 25, 26) .............................................................................. 5

5(4). Antennae light yellow, rarely darkening apically; elytra transverse, at suture as long as pronotum (Fig. 25); male tergite 8 usually with two teeth between two larger lateral teeth or median teeth lacking (Fig. 168); tubus of median lobe of aedeagus evenly arcuate in lateral view, without basal swelling (Fig. 166)...................................................... G. (P.) subnitens Casey

- Antennae yellow-brown to brown, distinctly darkening apically and sometimes blackening; elytra elongate, at suture longer than pronotum (Fig. 26); male tergite 8 with 2–3 small teeth between two larger lateral teeth (Fig. 175); tubus of median lobe of aedeagus unevenly arcuate in lateral view and with basal swelling (Fig. 173)....................................................................... ....................... G. (P.) meduxnekeagensis Klimaszewski & Webster , sp. n.

6(1). Head and pronotum usually yellow to light yellow-brown (Figs 13, 14)..... 7

- Head dark brown to black, pronotum yellow-brown to dark brown (Figs 1–12, 15–24)............................................................................................. 8

7(6). Pronotum approximately quadrate (Fig. 13); genital structures as illustrated (Figs 89–95) ....................................................... G. (G.) antennaelis Casey

- Pronotum distinctly transverse (Fig. 14); genital structures as illustrated (Figs 96–99)................................................................. G. (G.) chippewa Seevers

8(6). Pronotum uniformly coloured, yellow to dark brown (Figs 1–9, 11–20, 22– 24)............................................................................................................. 9

- Pronotum bicoloured, median part of the disc dark brown and sides light yellowish- brown (Figs 10, 21) ................................................................. 25

9(8). Pronotum uniformly dark brown to nearly black, usually strongly transverse (Figs 4, 7, 20, 22–24) .............................................................................. 10

- Pronotum uniformly yellow to light brown, slightly to strongly transverse (Figs 5, 6, 8, 9, 11, 12, 15, 16–19) .......................................................... 15

10(9). Antennae entirely light yellow (Figs 20, 24); elytra yellowish with irregular dark patches (Figs 20, 24), genital structures as illustrated (Figs 132–138, 159–165)................................................................................................. 11

- Antennae light to dark brown, always darkening apically (Figs 4, 7, 22, 23); elytra dark brown to black with light brown patches (Figs 4, 7, 22, 23), genital structures as illustrated (Figs 32–38, 53–56, 145–158) ....................... 12

11(10). Body broadly subparallel, abdomen broad and subparallel (Fig. 24), genital structures as illustrated (Figs 159–165) .... G. (G.) flavicornis Melsheimer

- Body narrowly oval, abdomen narrow and tapering posteriorly (Fig. 20), genital structures as illustrated (Figs 132–138)......................................... .............................................................................. G. (G.) fuscicollis Casey

12(10). Body distinctly bicoloured, humeri of elytra and often basal part of abdomen paler, moderately glossy (Figs 4, 22, 23)................................................... 13

- Body approximately uniformly dark brown, strongly glossy, broad, pronotum strongly transverse (Fig. 7); genital structures as illustrated (Figs 53–56)........ ................................................................................... G. (G.) illiana Seevers

13(12). Pronotum light reddish-brown, elytra light yellowish-brown with dark brown or black posterior angles, base of abdomen yellowish to light-brown, apical part dark brown (Fig. 4); genital structures as illustrated (Figs 31–38) ......... ..................................................................................... G. (G.) keeni Casey

- Pronotum dark brown, elytra dark brown with small, irregularly distributed, paler patches, base of abdomen light yellowish-brown (Figs 22, 23); genital structures as illustrated (Figs 145–158) .................................................... 14

14(13). Antennae uniformly light yellow (Fig. 22); genital structures as illustrated (Figs 145–151) .......................................................... G. (G.) uteana Casey

- Antennae infuscated (Fig. 23), genital structures as illustrated (Figs 152– 158)......................................................................... G. (G.) gaudens Casey

15(8). Pronotum slightly transverse, almost quadrate (Figs 15–19)..................... 16

- Pronotum strongly transverse (Figs 5, 6, 8, 9–12) .................................... 20

16(15). Antennal articles 6–10 dark brown (Figs 15, 17)...................................... 17

- Antennal articles 6–10 light yellow (Figs 16, 18–20)................................ 18

17(16). Body length 2.3–2.8 mm, elytra at suture longer than pronotum (Fig. 15); genital structures as illustrated (Figs 100–106).......... G. (G.) insolens Casey

- Body length 1.3–1.5 mm; elytra at suture at most as long as pronotum (Fig. 17); genital structures as illustrated (Figs 111–117)...................................... ............................ G. (G.) pseudocriddlei Klimaszewski & Webster , sp. n.

18(16). Elytra black, mottled with irregularly shaped light brown spots, particularly in humeral areas (Figs 16, 18); head uniformly dark brown to black, abdomen yellowish with darker, brownish, posterior portion (Figs 16, 18)..................................................................................................... 19

- Elytra uniformly yellow light-brown, some inconspicuous light brown spots may be present; head dark brown to black with paler base, abdomen uniformly light yellow brown (Fig. 19); genital structures as illustrated (Figs 125–131)................................................................. G. (G.) modesta Casey

19(18). Abdomen reddish-brown (Fig. 18); genital structures as illustrated (Figs 118– 124)....................................................................... G. (G.) gilvicollis Casey

- Abdomen yellow (Fig. 16); genital structures as illustrated (Figs 107–110) ...... ...................................................................................... G. (G.) criddlei Casey

20(15). Body length 1.5–1.7 mm; antennae uniformly light yellow (Fig. 12): genital structures as illustrated (Figs 85–88) ......................... G. (G.) dybasi Seevers

- Body length 1.5–2.3 mm, antennae with basal 4 articles light yellow and remaining articles light to dark brown (Figs 5, 6, 9, 11)........................... 21

21(20). Body narrow, base of abdomen distinctly narrower than elytra (Fig. 11): genital structures as illustrated (Figs 78–84) ................. G. (G.) affinis Sahlberg

- Body usually broad, base of abdomen about as broad as elytra (Figs 5, 6, 8, 9) ................................................................................................. 22

22(21). Body strongly glossy with bright metallic sheen, abdomen uniformly yellow, sometimes with slightly darker posterior portion (Fig. 5); genital structures as illustrated (Figs 39–45) .............................................. G. (G.) caseyi Seevers

- Body moderately glossy, abdomen uniformly reddish-brown or with pale base and darker posterior portion (Figs 6, 8, 9) ........................................ 23

23(22). Body short and stout, antennae short, not reaching posterior part of elytra (Fig. 6), posterior portion of abdomen dark brown; genital structures as illustrated (Figs 46–52)……… .................................... G. (G.) laetula Casey

- Body elongate, antennae long, reaching posterior part of elytra (Figs 8, 9), entire abdomen uniformly reddish-brown; genital structures as illustrated (Figs 57–70) ............................................................................................ 24

24(23). Elytra aspirate (Fig. 8); abdomen tapering posteriorly; genital structures as illustrated (Figs 57–63)...... .............................. G. (G.) sculptipennis Casey

- Elytra not aspirate (Fig. 9); abdomen subparallel; genital structures as illustrated (Figs 64–70) .................................................. G. (G.) involuta Casey

25(8). Body strongly glossy, elytra bicoloured with scutellar area and posterolateral angles black (Fig. 10); genital structures as illustrated (Figs 71–77) .............. ................................................................................... G. (G.) lobata Casey

- Body moderately glossy, elytra approximately uniformly dark brown (Fig. 21); genital structures as illustrated (Figs 139–144).... G. (G.) vitrina Casey