Paederus littorarius

Gravenhorst, 1806

Shore Rove Beetle

littorarius is a of in the , commonly known as the Shore Rove Beetle. Like other members of the Paederus, this species produces , a toxic compound in its that can cause dermatitis and blistering on human skin upon contact. The species is widely distributed across northern North America.

Paederus littorarius by (c) Dan MacNeal, some rights reserved (CC BY), uploaded by Dan MacNeal. Used under a CC-BY license.

Pronunciation

How to pronounce Paederus littorarius: /ˈpiːdəˌrʊs lɪˌtɔːˈreɪriəs/

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Identification

littorarius can be distinguished from similar by its coastal preference, as indicated by its specific epithet "littorarius" (relating to shorelines). Members of the Paederus are generally recognized by their slender, elongated bodies with short that leave most of the exposed, and their distinctive coloration patterns. Accurate -level identification requires examination of genitalic characters and other microscopic features.

Images

Habitat

Found in shoreline and coastal environments, as suggested by its and specific epithet. The occupies areas near water bodies including lakeshores, riverbanks, and coastal regions.

Distribution

Widely distributed across northern North America. Recorded from Canada (Alberta, British Columbia, Manitoba, New Brunswick, Newfoundland and Labrador, Nova Scotia, Northwest Territories, Ontario, Quebec, Saskatchewan) and the United States (Alaska, Arizona, Colorado, Connecticut, District of Columbia, Idaho, Indiana, Massachusetts, Maryland, Maine, New Hampshire, New Mexico, Nevada, New York, Ohio, Oregon, Pennsylvania, Rhode Island, South Carolina, Utah, Washington, Wyoming).

Human Relevance

Like other , P. littorarius contains in its , a potent vesicant compound. Contact with crushed or their hemolymph can cause Paederus dermatitis (also known as or Nairobi dermatitis), characterized by skin irritation, blistering, and linear . This represents a minor public health concern for individuals handling beetles or in areas where beetles are attracted to lights.

Similar Taxa

Paederus fuscipesA closely related in the same that also produces and causes similar dermatitis ; distinguished by distribution and subtle morphological differences
Paederus sabaeusAnother -producing , commonly known as the Nairobi , found in Africa and similarly attracted to lights where human contact occurs

More Details

Toxicity

The is notable for containing over 600 , many of which produce , a polyketide synthesized by bacterial endosymbionts (Pseudomonas species). Pederin is one of the most potent animal products known, causing severe dermatitis at nanogram concentrations.

Historical note

The defensive chemistry of has been exploited historically in warfare; during the Second Parthian War, pots containing Paederus beetles may have been thrown at enemies to cause skin blistering upon contact.