Conservation Status
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Introduced; not common.
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Cyclicity
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The only Alberta specimen was collected in September.
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Distribution
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This species is found in the Massachusetts and Washington (state) in the United States and has a disjunct distribution in Canada. In Alberta there is a single record from Edmonton.
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General Description
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This species, in the subgenus Carabus, is a European introduction. Black, upper surface and prosternum usually with rather dull brassy, sometimes greenish lustre. More slender than C. meander, with longer antennae and legs. The elytral sculpture is almost identical, except that a sutural ridge, inside the first row of tubercles, is at least suggested basally. Prothorax more pronouncedly square, with more broadly flattened sides. The elytral margin is not serrate behind the shoulders. Length 16 to 24 mm.
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Habitat
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In open country or light deciduous woods, usually near water, often on cultivated ground.
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Life Cycle
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Known to overwinter in the adult stage.
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Trophic Strategy
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Both larvae and adults are predatory.
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Carabus granulatus
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Carabus granulatus is a species of beetle. It is found across the Palearctic from Ireland to the Russian Far East and has been introduced to North America. It is widespread in Europe. C. granulatus lives in fields, prairies, taiga and in forests. Also along river margins, in fens, lakeshores, and upland peat. It is occasional in gardens.
Description
Photo showing the "chain links
It is a small Carabus (length between 14 and 20 mm), winged and characterized by an elongated body which is not very convex and an enlarged thorax. The antennae and the legs are black, the upper part of the animal shiny, predominantly greenish bronze, green or occasionally black. The elytra are subparallel with "chain link" (longitudinal grooves with granules).
Biology
Carabus granulatus is one of the very few species of ground beetles that have not completely lost their ability to fly, only the mountain forms are short-winged. Nevertheless, the nocturnal animals generally remain on the ground, where they prey on insects, worms and snails. During the day they hide under tree trunks or stones. From autumn to spring, the animals often spend the winter together in tree stumps. The females lay about forty eggs. The larvae moult three times before pupating in the ground. The adult beetles hatch in autumn.
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Carabus granulatus: Brief Summary
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Carabus granulatus is a species of beetle. It is found across the Palearctic from Ireland to the Russian Far East and has been introduced to North America. It is widespread in Europe. C. granulatus lives in fields, prairies, taiga and in forests. Also along river margins, in fens, lakeshores, and upland peat. It is occasional in gardens.
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