British insects: the families of Coleoptera
British insects: the families of Coleoptera |
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Cimberididae, Rhinomaceridae.
Pine Weevils.
General appearance. 2–5 mm long. Body length/maximum body width 1.95–2.8. Elytral length/pronotal length 2.25–3.15. Base of prothorax not or scarcely narrower than the combined elytral bases, or 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; not necked; conspicuously waisted; pitchy black with orange hairs; exhibiting bright ‘warning colours’. Upper surfaces of body non-glabrous; not bristly; with neither scales nor scale-like setae.
Detailed morphology. Beetles equipped with a rostrum (this long). Eyes strongly protuberant, or not strongly protuberant; bristly, or without bristles. The labrum externally visible from above (distinguishable as a separate segment from the clypeus). The maxillary palps normal, flexible. Antennae short to about half the insect's head to tail length; not elbowed; 11 segmented. Antennal scape not swollen. Antennae gradually expanding towards the apex. Antennal insertions hidden from above. Mandibular prosthecae present but reduced, or absent. Pronotal length/maximum pronotal width 0.7–1.25. Prothorax without notopleural sutures. Metaventrite without a transverse groove. Hind coxae not shaped posteriorly to receive the femur. Tarsal segmentation formula 4, 4, 4. The tarsi exhibiting bilobed segments; with a tiny penultimate segment hidden by distal lobing of the fourth and fused to the fifth. Front tarsi with as many segments as the mid-tarsi; 4-segmented, or 5-segmented (depending on interpretation). Mid-leg tarsi 4-segmented, or 5-segmented; pseudotetramerous. The claws of the mid-leg tarsi not appendaged. The claws of the mid-leg tarsi simple, or one-toothed or bifid. Hind tarsi with as many segments as the mid-tarsi; 4-segmented, or 5-segmented. Elytral length/maximum width across the elytra 1.5–2.05. Elytra exposing no more than part of the terminal tergite. Scutellary striole present, or absent. Elytra non-glabrous (with orange hairs). Wings well developed, or absent or much reduced. Exposed abdominal sternites 5; all articulated and movable. Abdominal segment 8 apparently without functional spiracles.
Adult habitat, ecology. Not predacious; phytophagous (on pollen of conifers); in living vegetation (on conifers).
Larvae. Larvae not predacious; phytophagous (associated with pollen of softwoods); on living vegetation.
Classification. Suborder Polyphaga; Superfamily Curculionoidea.
Worldwide and British representation. Genera about 25 (?). 1 species in Britain (R. attelaboides); genera in Britain 1; Rhinomacer.
General comments. Adults with the labrum separate from the clypeus.
Illustrations. • Rhinomacer attelaboides (from Joy). Rhinomacer attelaboides. • Rhinomacer attelaboides (with Anthribidae and Attelabidae): Fowler 5, 152 (1891). • Fowler 5, 152 (1891): original legend..
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: 2nd January 2012. http://delta-intkey.com’.
