British insects: the families of Coleoptera
British insects: the families of Coleoptera |
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Family name listed by neither Kloet and Hincks nor Unwin.
Wounded-tree beetles.
General appearance. Body length/maximum body width 1.43–1.56. Elytral length/pronotal length 4–4.8. Base of prothorax not or scarcely 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 oval; dorsally strongly convex; with the legs semi-contractile; not necked; not waisted; decidedly short-legged (retracting firmly into cavities in the ventral body surface, cf. Byrrhidae). Upper surfaces of body glabrous or subglabrous, or non-glabrous; not bristly; exhibiting scales or scale-like setae, or with neither scales nor scale-like setae.
Detailed morphology. Beetles not prognathous. Eyes not strongly protuberant; without bristles; finely facetted. Antennae very short to short; 11 segmented; clubbed (and with segment 3 unusually elongate). Antennal clubs 3 segmented (tomentose); preceded by a cupule. Antennal insertions hidden from above. Mandibular prosthecae well developed. Prothorax shorter than wide. Pronotal length/maximum pronotal width 0.31–0.35. Prothorax at its widest markedly narrower than the adjoining part of the abdomen, or not markedly narrower than the adjoining part of the abdomen. Prothorax without notopleural sutures. Metaventrite without a transverse groove. Hind coxae movable; posteriorly shaped to receive the retracted femur (with a sharp-edged declivity or hollow). Tarsal segmentation formula 5, 5, 5. The tarsi without bilobed segments; without ‘hidden’ segments. Front tarsi with as many segments as the mid-tarsi; 5-segmented. Mid-leg tarsi 5-segmented; pentamerous. The claws of the mid-leg tarsi not appendaged. The claws of the mid-leg tarsi simple. Hind tarsi with as many segments as the mid-tarsi; 5-segmented. Elytral length/maximum width across the elytra 1.14–1.28. Elytra exposing no more than part of the terminal tergite; hard; glossy. Scutellary striole absent. Wings well developed. Exposed abdominal sternites 5; all articulated and movable. Abdominal segment 8 with apparently functional spiracles.
Adult habitat, ecology. Under bark.
Larvae. Larvae in or under bark.
Classification. Suborder Polyphaga.
Worldwide and British representation. Genera 2 (Nosodendron, Nosotetocus). 1 species in Britain (?); genera in Britain 1 (?); Nosodendron. E.g., the mainland-European Nosodendron fasciculare (Tufted Nosodendron), the probably adventive mainland-European species illustrated by Curtis.
Illustrations. • Nosodendron fasciculare (Tufted Nosodendron: B. Ent. 246. Probably adventive). • Nosodendron fasciculare (details, B. Ent. 246). • Nosodendron fasciculare: B. Ent. 246, legend+text. • Nosodendron fasciculare: B. Ent. 246, text cont..
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’.
