5. Gyrophaena (Gyrophaena) caseyi Seevers

Figs 5, 39–45; Map 2

Gyrophaena caseyi Seevers, 1951: 684; Moore and Legner 1975: 428; Campbell and Davies 1991: 106.

Description. Body length 1.6–2.0 mm, approximately broadly subparallel; head rufous, rufo-piceous to (rarely) black; pronotum rufo-flavate, sometimes darker basally; elytra flavate or flavo-testaceous, mottled with darker brown posterocentral section of disc; abdomen flavo-testaceous with slightly darker apex. Punctation: vertex of head with at least six umbilicate punctures on each side; pronotum moderately densely punctured; elytra finely, irregularly punctate. Microsculpture: finely meshed and strong on head and elytra, obsolete on pronotum. Antennae as illustrated (Fig. 5). Pronotum 1.4 times as wide as long. MALE: tergite 8 with two large rounded lateral teeth and two smaller median teeth (Fig. 41); sternite 8 broadly rounded apically (Fig. 42). Median lobe of aedeagus with approximately triangular tubus bearing median swelling and small and narrow apical projection directed dorsally in lateral view (Fig. 39), dorsal projection of internal sac narrowly elongate and twisted (Fig. 39). Paramere as illustrated (Fig. 40). FEMALE. Tergite 8 truncate apically (Fig. 44); sternite 8 slightly pointed medially (Fig. 45); spermatheca as illustrated (Fig. 43).

Bionomics. Macrohabitat: mixed forest, mixed forest with hemlock, hardwood forest, yellow birch ( Betula alleghaniensis Britt.) and spruce forest, red spruce forest,

Map 2. Collection localities in New Brunswick, Canada of Gyrophaena caseyi

mature red maple and red spruce forest. Microhabitat: on gilled mushrooms, on small gilled mushrooms on side of rotten logs, on Pleurotus sp. growing on side of logs. Collecting period: August and September. Collecting method: sifting mushrooms, aspirating, and hand collecting specimens.

Distribution (Map 2). CANADA: New Brunswick, Quebec; UNITED STATES: Michigan, New York, North Carolina, and Pennsylvania.