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White-marked spider beetle (Ptinus fur)


The white-marked spider beetle grows to a length of up to 4 mm. The wing cases show pronounced spots and are crossed by two light-coloured bands. Females and males differ considerably in this beetle species. The males are red-brown and have a narrow abdomen, whereas the females are dark brown with an oval abdomen. The larvae are yellowish white and live in the nutrient substrate. The white-marked spider beetle occurs all over the world, as does its close relative the Australian spider beetle (Ptinus tectus).


Damage is caused by beetle feeding, and above all be larval feeding in stored products. They feed on many kinds of plant and animal products such as grain and grain products, herbal drugs, seeds, feathers, furs, sausage, etc. Packaging is also damaged when the beetles bore their way out.