Pteronarcella badia

(Hagen, 1874)

Least Salmonfly

Pteronarcella badia, commonly known as the least salmonfly, is a in the Pteronarcyidae found in western North America. It is one of two species in the Pteronarcella. The species occupies mid-elevation mountain streams and exhibits complex genetic structure with six deeply divergent clades across its range. are capable of overland , which serves as an important mechanism between drainage systems.

Pronunciation

How to pronounce Pteronarcella badia: //ˌtɛrəˈnɑrsɛlə ˈbeɪdiə//

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Habitat

Mid-elevation mountain streams across western North America

Distribution

Western North America, ranging from Alaska to northern New Mexico. Documented occur in the Pacific Northwest (northern California to southern Washington), Northern Rockies (Montana and southern Canada), Western Great Basin (northern Nevada), and throughout the Rocky Mountains including Colorado Plateau and Rio Grande drainages. Distribution records include Alberta, Arizona, Alaska, British Columbia, and Colorado.

Diet

Herbivorous

Life Cycle

Aquatic stages occur in streams. Winged stage capable of overland for between drainage systems.

Behavior

Males perform ranging search until establishing vibrational duets with females, then engage in local search using triangulation based on female vibrational cues. Females remain stationary during male search. Males locate females through tactile contact, followed by immediate mounting and mating. Increased frequency of duets significantly reduces male finding time.

Similar Taxa

Pteronarcys californicaCo-occurs in western North American streams and shares Pteronarcyidae; distinguished by larger body size and different growth patterns

More Details

Genetic Population Structure

Six deeply divergent clades identified: Old Colorado Plateau, Old Rio Grande, Western Great Basin, Pacific Northwest, Northern Rockies, and Widespread. Evidence of multiple glacial refugia across the distribution with secondary contact among clades. A potentially cryptic lineage exists in the Pacific Northwest supported by mitochondrial and nuclear divergence.