British Insects: the Families of Coleoptera
British Insects: the Families of Coleoptera |
|
Including Apoderidae, Pterocolidae, Rhynchitidae, Curculionidae part.
General appearance. 2–10 mm long. Body length/maximum body width 1.2–2.35. Elytral length/pronotal length 1.15–3.2. Base of prothorax distinctly narrower than the combined elytral bases. Greatest prothoracic width not narrower or only slightly narrower than the greatest elytral width, or distinctly narrower than greatest elytral width. Beetles elongate-oval, or elongate (head elongated, abdomen shortly oblong); conspicuously necked; somewhat waisted. Upper surfaces of body glabrous or subglabrous, or non-glabrous; not bristly; with neither scales nor scale-like setae.
Detailed morphology. Beetles equipped with a rostrum; prognathous, or not prognathous. Inclination of the head slight to very strong. Eyes strongly protuberant, or not strongly protuberant; without bristles; finely facetted. Antennae short; not elbowed; 11 segmented; without a much-elongated scape. Antennal scape not swollen. Antennae clubbed. Antennal clubs 3 segmented. Antennal insertions visible from above, or hidden from above; not in fossae. Mandibular prosthecae absent.
Prothorax shorter than wide. Pronotal length/maximum pronotal width 0.55–2.07. Prothorax at its widest markedly narrower than the adjoining part of the abdomen. Prothorax without notopleural sutures. Metaventrite without a transverse groove. The tarsi exhibiting bilobed segments; with a tiny penultimate segment hidden by lobing of the one proximal to it. Mid-leg tarsi 5-segmented; pseudotetramerous. Claws of the mid-leg tarsi not appendaged. Front tarsi with as many segments as the mid-tarsi; 5-segmented. Hind tarsi with as many segments as the mid-tarsi; 5-segmented. Tarsal claws simple, or one-toothed or bifid; without an associated empodium. Elytral length/maximum width across the elytra 0.67–1.65. Elytra exposing no more than part of the terminal tergite to at least three complete abdominal tergites. Scutellary striole present, or absent. Wings well developed.
Visible abdominal sternites 5; immovably joined 2–4. Abdominal segment 8 apparently without functional spiracles.
Habitat, ecology. Not predacious; phytophagous; in living vegetation.
Larvae. Larvae not predacious; phytophagous; on living vegetation (in rolled leaves of hawthorn and hazel).
Classification. Suborder Polyphaga; Superfamily Curculionoidea.
British representation. Genera 5; 21 species. E.g., Attelabus nitens.
Illustrations. • Attelabus nitens (Janson 90). • Rhynchites ophthalmicus: Janson 211, 219, 221.
To view the illustrations with detailed captions, go to the interactive key. This also offers 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.
Cite this publication as: ‘Watson, L., and Dallwitz, M.J. 2003 onwards. British insects: the families of Coleoptera. Version: 18th September 2008. http://delta-intkey.com’.
