Pennisetia

Dehne, 1850

raspberry clearwing moths

Species Guides

Pennisetia marginatum(Raspberry Crown Borer)

Pennisetia is a of clearwing moths in the Sesiidae, commonly known as raspberry clearwing moths. The genus contains approximately 14 described distributed across the Palearctic region and North America. Species in this genus are characterized by their -mimicking appearance, with transparent wings and narrow dark borders. Pennisetia hylaeiformis, the type species, has been extensively studied for its and serves as a model for understanding sesiid chemical .

Pennisetia marginatum by (c) Linda Watson, some rights reserved (CC BY), uploaded by Linda Watson. Used under a CC-BY license.

Pennisetia by (c) Donald Hobern, some rights reserved (CC BY). Used under a CC-BY license.

Raspberry Crown Borer - Pennisetia marginatum, Occoquan Regional Park, Lorton, Virginia, September 21, 2021 (53469050860) by Judy Gallagher. Used under a CC BY 2.0 license.

Pronunciation

How to pronounce Pennisetia: //ˌpɛnɪˈsiːʃə//

These audio files are automatically generated. While they are not always 100% accurate, they are a good starting point.

Identification

Identification of Pennisetia relies on examination of external morphological characters and male genitalia. Species can be distinguished by wing venation patterns, the shape and coloration of abdominal bands, and the structure of the uncus and gnathos in male genitalia. On Sakhalin Island, P. hylaeiformis and P. fixseni can be separated by differences in their external characters and male genital .

Images

Distribution

The Pennisetia has a wide distribution spanning the Palearctic region and North America. Records include Denmark, Norway, Sweden, Germany, Russia (including Sakhalin Island), China, Japan, and the eastern United States (Vermont). Specific distributions vary: P. hylaeiformis occurs across Europe and Asia, while P. fixseni is found in East Asia including Sakhalin.

Seasonality

activity occurs during daylight hours. Field studies of P. hylaeiformis in Germany showed pronounced male response to lures in the later afternoon.

Host Associations

Rubus idaeus - larval Association inferred from 'raspberry clearwing moth' for P. hylaeiformis; specific records for other Pennisetia are not documented in available sources.

Behavior

Males of P. hylaeiformis have been observed to fly straight toward sources over distances up to 1000 meters, even across open terrain lacking visual landmarks. Visual cues such as tree silhouettes do not appear essential for pheromone orientation. Males respond to synthetic pheromone blends during daylight only, with activity peaking in late afternoon.

Human Relevance

Pennisetia hylaeiformis is of economic concern as a pest of raspberry (Rubus idaeus). The has been used as a model organism for studying sesiid , with field attraction studies conducted to identify candidate pheromone components for potential monitoring or control applications.

Similar Taxa

SynanthedonBoth are of clearwing moths in Sesiidae with transparent wings and -mimicking appearance; distinguished by differences in wing venation, abdominal banding patterns, and male genitalia structure.
SesiaAnother sesiid with clearwing ; Pennisetia typically have more slender and different wing border patterns.

More Details

Pheromone biology

P. hylaeiformis males are attracted to blends of (E,Z)-3,13-octadecadienyl acetate and its corresponding alcohol. The 100:100 blend ratio is most attractive over long range, while ratios skewed toward either component have reduced drawing range. Synergistic effects occur even when the two compounds are released from separate dispensers up to 1 meter apart.

Taxonomic history

The was established by Dehne in 1850. Subspecific classification has been proposed for some , including P. hylaeiformis hylaeiformis and P. hylaeiformis assimilis, as well as P. fixseni fixseni and P. fixseni admirabilis, though the taxonomic status of these forms varies by region.