Rhogogaster chlorosoma - Pale-collared Carver

Recorded widely throughout most of mainland Britain, as well as in Orkney (Musgrove, 2023).

This species is very similar to scalaris. Rhogogaster chlorosoma is generally less black-marked on the abdomen but pale scalaris specimens overlap with dark chlorosoma species. Males of the two species can be determined by the length of the plantar lobes (tarsal pulvilli) on the hind tarsi. In chlorosoma males the plantar lobe of one tarsal segment is about one-half the length of the following tarsal segment. In scalaris, it is one-third. In females, there is some crossover in this characteristic.
The black markings on the top of the head form an enclosed figure-of-eight.

Larvae are recorded from a broad range of trees and herbs including alders, poplars, willows, rowans and meadowsweet.

Jump to other Rhogogaster species

Size: 10 - 13mm

GB IUCN Status: Least Concern
GB Rarity Status: None

Distribution: England, Scotland, Wales

Flight period: May to July

Plant associations: Polyphagous. Alnus spp., Populus spp., Salix spp., Sorbus spp. and Filipendula ulmaria (various trees and herbs)

References:

Benson, R.B., 1952. Handbooks for the Identification of British Insects. Hymenoptera, Symphyta, Vol 6, Section 2(a-c), Royal Entomological Society, London

Liston A, Knight G, Sheppard D, Broad G, Livermore L (2014) Checklist of British and Irish Hymenoptera - Sawflies, ‘Symphyta’. Biodiversity Data Journal 2: e1168. https://doi.org/10.3897/BDJ.2.e1168

Musgrove, A.J. 2023. A review of the status of sawflies of Great Britain - Phase 2: The Athaliidae and the Tenthredinidae (excluding Nematinae). Natural England, unpublished

Taeger, A. and Viitasaari, M., 2015. European Rhogogaster s. str., with notes on several Asian species (Hymenoptera: Tenthredinidae). Zootaxa, 4013(3), pp.369-398.