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| Insects of Britain and Ireland: the families of Hemiptera |
Woolly Aphids.
Salient features of adults. Terrestrial.
Phytophagous (tapping phloem). Tiny to small (?); represented by ‘normal’ insects only; fliers and non-fliers; conspicuously stilt-legged to not stilt-legged. Head plus thorax of apterae not exceeding that of the abdomen. Rostrum ostensibly originating between the front legs; not separated from the prosternum by a gula. Antennae longer than the head, readily visible from above; 1–6 segmented. Antennae of apterae 4–6 segmented. Antennae non-aristate. Fore-wings well developed, or vestigial or absent; in the resting insect sloping roof-like over the abdomen; more or less uniform in texture; when macropterous, without costal fracture and cuneus; without a clavus; with four oblique veins. Tarsi 2 segmented; two-clawed. The abdomen equipped with a pair of secretory ‘cornicles’ (siphunculi) towards the rear (reduced), or without secretory ‘cornicles’.
Fore- and hind-wings when present clear, of similar texture.
Taxonomy. Suborder Homoptera. Sternorrhyncha. Aphidoidea.
British representation. 38 species in Britain; genera 20. Aloephagus, Aploneura, Asiphum, Baizongia, Cerataphis, Colopha, Eriosoma, Forda, Geoica, Kaltenbachiella, Mimeuria, Paracletus, Patchiella, Pemphigus, Prociphilus, Rhizomaria, Schizoneura, Sminthurodes, Tetraneura, Thecabius, Truncaphis.
We advise against extracting comparative information from the descriptions. This is much more easily achieved using the DELTA data files or the interactive key, which allows access to the character list, illustrations, full and partial descriptions, diagnostic descriptions, differences and similarities between taxa, lists of taxa exhibiting or lacking specified attributes, and distributions of character states within any set of taxa. See also Guidelines for using data taken from Web publications.
Cite this publication as: ‘Watson, L., and Dallwitz, M.J. 2003 onwards. Insects of Britain and Ireland: the families of Hemiptera. Version: 27th July 2019. delta-intkey.com’.