IV. Gyrophaena (Gyrophaena) illiana species group

7. Gyrophaena (Gyrophaena) illiana Seevers, 1951: 688 (CANADA: New Brunswick; UNITED STATES: Illinois, Indiana, and Wisconsin) .

V. Gyrophaena (Gyrophaena) sculptipennis species group 8. Gyrophaena (Gyrophaena) sculptipennis Casey, 1906: 298 (CANADA: New Brunswick, Nova Scotia, and Quebec; UNITED STATES: New Hampshire, New York, and Wisconsin).

VI. Gyrophaena (Gyrophaena) fasciata species group 9. Gyrophaena (Gyrophaena) involuta Casey, 1906: 294 (CANADA: New Brunswick; UNITED STATES: Maine, Massachusetts, New York, and Wisconsin).

VII. Gyrophaena (Gyrophaena) egena species group 10. Gyrophaena (Gyrophaena) egena Casey, 1906: 303 (CANADA: Ontario and Quebec; UNITED STATES: Massachusetts, North Carolina, Pennsylvania, and Rhode Island). Gyrophaena (Gyrophaena) exilis Casey, 1906: 304 .

VIII. Gyrophaena (Gyrophaena) lobata species group 11. Gyrophaena (Gyrophaena) lobata Casey, 1906: 294 (CANADA: New Brunswick; UNITED STATES: District of Columbia, Illinois, Indiana, Kansas, Michigan, New York, and Wisconsin) .