predaceous diving beetle
(Dytiscus spp.)
Overview • Description • Distribution • Taxonomy
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Description |
Adults are broadly oval and large, ⅞″ to 1 9⁄16″ (22 to 40 mm) long. They are black or dark brown, often with a greenish tinge. The body is broadest near the middle. The sides of the thoracic shield (pronotum) on most species are bordered with yellow. The sides of the hardened wing covers (elytra) on all species are bordered with yellow. The elytra on the female of most species have 10 parallel grooves. The elytra on the male of all species is smooth. The legs are yellow or brownish. The fourth leg segment (tibia) on the hind leg is much longer than broad, and has a long, very thin spur at the tip. |
Distribution |
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| 9/28/2024 | ||
Taxonomy |
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Order |
Coleoptera (beetles) |
Suborder |
Adephaga (ground and water beetles) |
Superfamily |
Dytiscoidea |
Family |
Dytiscidae (predaceous diving beetles) |
Subfamily |
Dytiscinae |
Tribe |
Dytiscini |
Subordinate Taxa |
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black-bellied great diving beetle (Dytiscus semisulcatus) boreal water beetle (Dytiscus alaskanus) Dauria dytiscid diving beetle (Dytiscus dauricus) great diving beetle (Dytiscus marginalis) highland great diving beetle (Dytiscus circumcinctus) Harris’s diving beetle (Dytiscus harrisii) highland great diving beetle (Dytiscus circumcinctus) king diving beetle (Dytiscus dimidiatus) predaceous diving beetle (Dytiscus cordieri) predaceous diving beetle (Dytiscus hybridus) ringed dytiscid diving beetle (Dytiscus circumcinctus) understriped diving beetle (Dytiscus fasciventris) vertical diving beetle (Dytiscus verticalis) wasp great diving beetle (Dytiscus circumflexus) |
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Synonyms |
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Diticus Dyticus Leionotus Lionotus Macrodytes |
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Common Names |
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This genus has no common name. The common name of the Family Dytiscidae is predaceous diving beetles, and it is applied here for convenience. |
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Glossary
Elytra
The hardened or leathery forewings of beetles used to protect the fragile hindwings, which are used for flying. Singular: elytron.
Pronotum
The exoskeletal plate on the upper side of the first segment of the thorax of an insect.
Tibia
The fourth segment of an insect leg, after the femur and before the tarsus (foot). The fifth segment of a spider leg or palp.
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Amy Piere-Soll |
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Visitor Sightings |
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Adam R. |
Location: Rural Duluth, Mn seemed drawn to patio lighting. Flew in like a brown Tinkerbell, nearly an upright orientation, somewhat clumsy, but landed on my leg. Hung around for a while. Lake Superior is 2 miles away. There is a small creek within a few hundred yards of encounter. Had never seen this species before. |
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| Shawn Hyde 4/4/2021 |
Location: Bigfork, MN - Itasca County Flew to our lighting while we were boiling maple About 100ft from the lake. |
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| Janice Cooney 10/12/2020 |
Location: northeast Nebraska I found this beetle on my deck last night near the porch light. It is an oval shaped insect a little over an inch long, dark brown/black, shiny with large eyes. It has little muffs on its front legs and has an unpleasant odor. I have never seen a beetle like this and it was the only one around. I am located in northeast Nebraska and the night time temperatures are in the 40 -50's. Photo by Amy Piere-Soll |
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MinnesotaSeasons.com Sightings |
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Created: 10/22/2020 Last Updated: © MinnesotaSeasons.com. All rights reserved. |