Gyrophaena (Gyrophaena) lobata

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 : 101-103

VIII. Gyrophaena (Gyrophaena) lobata species group ( Seevers 1951: 693) 11. Gyrophaena (Gyrophaena) lobata Casey

Figs 10, 71–77; Map 7

Gyrophaena lobata Casey, 1906: 294 ; Seevers 1951: 693; Moore and Legner 1975: 430.

Description. Body length 1.9–2.2 mm, narrowly oval and strongly glossy; head rufo-piceous to piceous; pronotum flavate with central part of disc piceous; elytra rufous with scutellar area and posterior angles piceous; abdomen rufo-flavate, apical part of abdomen sometimes darker. Punctation: vertex of head with several large umbilicate punctures on each side, pronotum with a few punctures, elytra finely punctate, in outer part of disc more densely so. Microsculpture: reticulate, distinct on head and weak to obsolete on pronotum and elytra. Antennae as illustrated (Fig. 10). Pronotum 1.3 times as wide as long. MALE: tergite 8 with two small lateral teeth and large median lobe (Fig. 73); sternite 8 broadly rounded apically (Fig. 74). Median lobe of aedeagus with approximately triangular tubus projecting ventrally, its venter strongly sinuate, apex narrow and acute (Fig. 71), dorsal projection of internal sac narrowly elongate and arcuate (Fig. 71). Paramere as illustrated (Fig. 72). FEMALE. Tergite 8 similar to that of male and with apical lobe (Fig. 76); sternite 8 broadly rounded and slightly pointed medially (Fig. 77); spermatheca as illustrated (Fig. 75).

Bionomics. Macrohabitat: mixed and hardwood forests. Microhabitat: gilled mushrooms. Collecting period: July through September. Collecting method: sifting mushrooms and aspirating specimens.

Distribution (Map 7). CANADA: New Brunswick; UNITED STATES: District of Columbia, Illinois, Indiana, Kansas, Michigan, New York, and Wisconsin.

Map 7. Collection localities in New Brunswick, Canada of Gyrophaena lobata

Ι3. G. antennalis Ι4. G. chippewa Ι5. G. insolens

Figures Ι0–Ι5. Gyrophaena species in dorsal view (apical part of abdomen removed): Ι0 G. (G.) lobata Casey ΙΙ G. (G.) affinis Sahlberg Ι2 G. (G.) dybasi Seevers Ι3 G. (G.) antennalis Casey Ι4 G. (G.) chippewa Seevers and Ι5 G. (G.) insolens Casey.