Monardis plana (Rose-bud sawfly)
Found in Wales in sand dune systems in 2003. Adults closely resemble Cladardis spp. but can be distinguished by the presence of robust spines on the sawsheath. Another rose feeder, Ardis pallipes, also has spines on the sawsheath. However, Monards plana lacks the deep pits around the eye orbits that characterise Ardis spp.
Monardis plana larvae feed within the unopened folds of leaflets in the buds of burnet rose before burrowing apical shoots and flower stalks.
Size: 6 - 7mm
Flight period: April to May
Plant associations: Rosa spinosissima (Burnet Rose)
The National Biodiversity Network records are shown on the map below. (See terms and conditions)
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
Gibbs, D., 2006. Rose bud sawfly, Monardis plana (Klug)(Hymenoptera: Tenthridinidae), new to Britain, discovered in South Wales. British Journal of Entomology and Natural History, 19(2), pp.105-108.