Nematus laticulus

Nematus laticulus can be distinguished from related Nematus species by the combination of a broadened tarsal claw (reflected in the species name 'laticulus,' meaning somewhat broad) and specific wing venation patterns. Males have distinctive genitalia structures useful for species-level identification. Females possess a saw-like ovipositor typical of the subfamily. Coloration is generally pale with variable dark markings on the thorax and abdomen.

Associated with riparian and wetland habitats where willow (Salix) species grow. Found in shrubby areas, fens, and along watercourses with Salix stands.

Europe. Records indicate presence across northern and central European countries including the United Kingdom, France, Germany, and Scandinavia.

Adults active from May to July, with peak activity in late spring.

Larvae feed on willow (Salix) leaves. Specific host species within Salix have not been definitively established.

• Salix - larval host plantGenus-level association; specific Salix species not confirmed

Females use their saw-like ovipositor to insert eggs into willow leaves or stems. Larvae feed externally on foliage, consuming leaf tissue. Pupation occurs in soil or leaf litter. Adults emerge the following spring. Exact timing of larval stages and number of generations per year are not well documented.

Larvae function as herbivores on willow, contributing to nutrient cycling and serving as prey for parasitoid wasps and other natural enemies.

• Nematus ribesiiSimilar size and general appearance, but N. ribesii feeds on currant and gooseberry (Ribes) rather than Salix; adults differ in color pattern and genitalia structure
• Nematus pavidusAnother willow-associated Nematus; separation requires examination of tarsal claw breadth and male genitalia details

• sawfly
• Tenthredinidae
• Nematinae
• willow
• Salix
• Europe
• spring
• herbivore
• riparian

• BugGuide