Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada
Clickable Guide
Moths Butterflies Flies Caterpillars Flies Dragonflies Flies Mantids Cockroaches Bees and Wasps Walkingsticks Earwigs Ants Termites Hoppers and Kin Hoppers and Kin Beetles True Bugs Fleas Grasshoppers and Kin Ticks Spiders Scorpions Centipedes Millipedes

Upcoming Events

Photos of insects and people from the 2022 BugGuide gathering in New Mexico, July 20-24

National Moth Week was July 23-31, 2022! See moth submissions.

Photos of insects and people from the Spring 2021 gathering in Louisiana, April 28-May 2

Photos of insects and people from the 2019 gathering in Louisiana, July 25-27

Photos of insects and people from the 2018 gathering in Virginia, July 27-29

Photos of insects and people from the 2015 gathering in Wisconsin, July 10-12

Previous events


Species Cladius pectinicornis - Bristly Roseslug Sawfly

Sawfly larvae on rose bush in December - Cladius pectinicornis Adult - Cladius pectinicornis - male Bristly Rose Slug? - Cladius pectinicornis Flying insect - Cladius pectinicornis - male sawfly - Cladius pectinicornis - female sawfly - Cladius pectinicornis sawfly - Cladius pectinicornis Cladius difformis - Bristly Roseslug Sawfly - Cladius pectinicornis
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Hymenoptera (Ants, Bees, Wasps and Sawflies)
No Taxon ("Symphyta" - Sawflies, Horntails, and Wood Wasps)
Family Tenthredinidae (Common Sawflies)
Subfamily Nematinae
Tribe Cladiini
Genus Cladius
Species pectinicornis (Bristly Roseslug Sawfly)
Synonyms and other taxonomic changes
Cladius difformis (Panzer, 1799) is often considered as synonymous to Cladius pectinicornis (Geoffroy 1785)(1). While Dr. D.R. Smith maintains that the two are distinct species (with C. pectinicornis being strictly Palaearctic and C. difformis found in the Nearctic), subsequent literature has found no morphological nor genetic rationale to separate the two.
Explanation of Names
Cladius pectinicornis (Geoffroy, 1785)
5-7 mm(2)

"Few sawflies have hairs such as this. Rather long hairs on body, prolegs on abdominal segments 2-7 and 10, and feeding on rose pretty well narrows this down to the bristly roseslug." --Dr. Smith's comments
Native to the Palaearctic; probably introduced in North America(2)
Larvae feed on rose leaves, raspberry and strawberry; skeletonizing at first and eating all the leaf tissues but the veins when they get bigger.
Life Cycle
They go through multiple generations a year, if the weather stays warm.
may damage raspberry and strawberry(2)
Internet References
Fact sheet [Web Archive] (Rosetta 2009)(3)