Oxyporus rufus (Linnaeus, 1758)

Widespread throughout England and southern Scotland, being found in decaying fungi and usually occurring in numbers where found. The beetle is distinctive in many ways and so never likely to be confused with any other.

7-11mm. Antennae black, inserted on front margin of head outside base of mandibles, joints 7-10 transverse and 11 elongate so forming a long club. Mandibles directed forward and about the same length as the head. Last segmant of labial palpi dilated, hatchet shaped. Head black, transverse. Eyes large. Front margin level with anterior margin of head. Temples long. Pronotum reddish yellow, quadrate and broadest at middle. Elytra reddish with apical half (or so) black. Abdomen reddish with apical half black. Legs light, tarsi 5-5-5 with last segment elongate.

Readily identified from Joy, Tottenham or Freude and often featured in colour guides.