Willow Apple Gall Sawfly

Euura californica

Classification

Phylum: Arthropoda
Subphylum: Hexapoda
Class: Insecta
Order: Hymenoptera
Family: Tenthredinidae
Subfamily: Nematinae
Tribe: Nematini
Genus: Euura
Species: californica

Pronunciation

How to pronounce Euura californica: //ˈjʊərə ˌkælɪˈfɔːrnɪkə//

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

Images

Willow Apple Gall Sawfly Euura californica - iNaturalist Photo 161639467, no rights reserved, uploaded by Irene by iNat user aparrot1 (Irene). Used under a CC0 license.

Summary

Euura californica, commonly known as the willow apple gall sawfly, creates unique galls on willow leaves that serve as nurseries for its larvae. This species plays a role in the ecosystem by feeding on willow, and it has a unique life cycle allowing for multiple generations to develop each year.

Physical Characteristics

The gall created by Euura californica is round and colored red/green, featuring lenticels (wartlike scales, tubercles) and protrudes on both sides of the leaf.

Identification Tips

Look for round galls on arroyo willow leaves; they are the only round galls with lenticels found in California.

Habitat

Typically found in areas where willow species, such as Salix lasiolepis and Salix lemmonii, grow.

Distribution

California, specifically associated with willow trees.

Diet

The larva feeds on the leaves of willow trees, particularly Salix lasiolepis and Salix lemmonii.

Life Cycle

Euura californica breeds year-round, producing up to six generations in suitable locations.

Reproduction

Eggs are laid within the leaves of willow trees, with galls forming around the eggs, serving as a nursery for the developing larvae.

Ecosystem Role

Acts as a herbivore on willow trees, influencing the health and growth of these plants.