Dioryctria rossi

Munroe, 1959

Dioryctria rossi is a of in the , described by Eugene G. Munroe in 1959. The species was named in honor of Douglas Alexander Ross, a Canadian forest . It occurs in western North America, where its develop within the cones of pine trees.

Pronunciation

How to pronounce Dioryctria rossi: //ˌdaɪ.oʊˈrɪk.tri.ə ˈrɒs.aɪ//

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Identification

can be distinguished from other Dioryctria by a combination of genitalic characters and geographic distribution. The relatively small wingspan (22–34 mm) and western North range help separate it from larger or eastern . Accurate identification to species level typically requires examination of .

Appearance

Wingspan 22–34 mm. As a member of the Dioryctria, likely exhibit the characteristic with elongated labial projecting forward. Specific coloration and pattern details for this are not documented in available sources.

Habitat

Associated with coniferous forests, particularly stands of ponderosa pine and related pine . Larval is restricted to the cones of pines.

Distribution

Western North America: from southern British Columbia south to northern Mexico, and eastward to New Mexico. Distribution records also include Alberta, Canada.

Diet

feed on the cones of Pinus ponderosa (ponderosa pine), Pinus arizonica (Arizona pine), and Pinus durangensis (Durango pine). They develop inside the cones, feeding on cone tissues and seeds.

Host Associations

Pinus ponderosa - larval primary
Pinus arizonica - larval
Pinus durangensis - larval

Life Cycle

develop within the cones of pine . Specific details regarding placement, site, number of per year, and stage are not documented.

Ecological Role

As a cone-feeding , consume developing seeds and cone tissues, potentially reducing seed production in pines. The functions as part of the natural of conifer cone in western North pine forests.

Human Relevance

May be of concern in forest seed orchards or areas where pine seed production is economically important. The is named for Douglas Alexander Ross, a Canadian forest who worked at the Vernon forest laboratory in British Columbia from 1950 to 1970.

Similar Taxa

Other Dioryctria speciesApproximately 40 occur in North America; many are cone or shoot feeders on conifers. D. rossi is distinguished by its western distribution and association with Pinus ponderosa and related pines. Accurate separation requires examination.

More Details

Etymology

The specific epithet 'rossi' honors Douglas Alexander Ross (1911–1992), chief at the Vernon forest laboratory and research centre in Vernon, British Columbia, from 1950 to 1970. Ross collected the and recognized the as distinct, though it was formally described by Eugene G. Munroe in 1959.