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Figure 8.2.2 Tasgius winkleri (Bernhauer), pronotum. 8.2.3 T. winkleri, base of right antenna. 11.25.1 T. winkleri, dorsal habitus. 11.25.2 T. winkleri, from an urban garden.
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Tasgius winkleri is distinguished from other Tasgius occurring in ECAS by the combination of the pronotal punctures of subequal size (Fig. 8.2.2), the pronotum widest near the middle (Fig. 8.2.2) and the second antennomere not darkened at its base (Fig. 8.2.3). As in T. melanarius, the dense and subequal punctation of the pronotum causes an overall dull appearance (Fig. 11.25.1).
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This species was first correctly recognized in eastern and western North America by Newton (1987), who indicated that it had been collected as early as 1938 in New York. Prior to 1987, both this species and T. melanarius had been misidentified as T. globulifer. Additional specimens from Syosset, NY indicate that Tasgius winkleri has been in North America at least since 1931 and new records from eastern Canada (Ontario), Michigan, and Pennsylvania suggest that it is expanding its range in North America. Its range in ECAS is given by Map 31.
CANADA: ON: 176 specimens.
UNITED STATS: MI: Calhoun Co., near Marshall, I-69 rest stop, litter, 42.3278 -84.9901, 10-X-2008, A. Brunke and S.A Marshall, 1 (DEBU). Gratiot Co., Sumner Twp. Sec. 24, 43.3333 -84.7833, 8-IX-1977, R. D. Ward, 1 (CUIC). PA: Montgomery Co., Cold Point, 40.1167 -75.2667, 23-IX-1956, 1 (AMNH).
Eastern Canada: ON
Adjacent U.S.: MI, PA, NY, NH
Tasgius winkleri has been collected in ECAS in April to November, with an increase in abundance during September.
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Tasgius winkleri inhabits open woodlots, old fields, shorelines, wetland edges, and backyards, where it is found under rocks and in leaf litter. It has also been collected from a pile of rotting grass and in a compost heap. It is pronouncedly synanthropic and generally only occupies habitats that have been degraded by human activity.
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