Photinus tenuicinctus

Green, 1956

thinly-girdled firefly, Ozark spark

Photinus tenuicinctus is a firefly to the Ozark Mountains of Arkansas and Oklahoma. measure 8.5–11.5 mm in length. Males are fully winged and capable of , while females are brachypterous and flightless. The species exhibits in both and bioluminescent signaling.

Pronunciation

How to pronounce Photinus tenuicinctus: //foʊˈtɪnəs ˌtɛnjuˈsɪŋktəs//

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Identification

Distinguished from by the exceptionally narrow pale margins on the (the source of its specific epithet "tenuicinctus," meaning thinly bordered). The dark pronotal mark is broader at the top and tapers posteriorly, nearly reaching the base. Females are readily identified by their brachypterous condition. Flash pattern differs from similar : males emit single, sharp flashes of approximately 0.15 seconds duration at intervals of roughly 1.5 seconds; females respond with a single 0.8-second flash after a 0.4-second delay.

Habitat

Forests and shaded lawns within the Ozark Mountains.

Distribution

to the Ozark Mountains of eastern Oklahoma and northern Arkansas.

Seasonality

active during summer months; specific not documented in available sources.

Diet

Larvae feed on snails, worms, and other soft-bodied . feeding habits not documented.

Life Cycle

Complete with four stages: , larva, pupa, and . Larval stage is predominant, spent primarily below the soil surface. Larvae are bioluminescent.

Behavior

Males fly 1–2 meters above ground while flashing to attract females. Males travel approximately 2 meters between flashes. Females are sedentary, perching on vegetation to observe and respond to male signals. Courtship involves -specific flash patterns; successful courtship leads to mating on vegetation.

Ecological Role

Predatory larvae contribute to soil regulation through consumption of soft-bodied . serve as prey for Photuris fireflies, which mimic female flash patterns to capture males.

Human Relevance

Subject to pressures from light pollution, destruction, and lawn use—factors implicated in firefly declines generally.

Similar Taxa

  • Photinus pyralisWidespread eastern North American ; distinguished by broader pale elytral margins and different flash pattern.
  • Photinus carolinusSynchronous flashing found in Appalachian and Allegheny regions; exhibits mass synchronized flashing not reported in P. tenuicinctus.
  • Photuris spp.Predatory fireflies that mimic Photinus flash patterns; distinguished by larger size, different body proportions, and aggressive predatory .

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Sources and further reading