SUMMARY A new trace fossil, Selenichnus hundalensis, is described and figured from a sandstone in the Middle Jurassic Scarborough Formation of the Yorkshire coast. The trace is preserved as a shallow, sub-oval, positive hypichnion, wider than long, with a rounded anterior margin and paired convex lunate lobes directed anterolaterally. It is considered to have been made by a limulid during shallow burrowing but because of its morphology it cannot be accommodated in the existing ichnogenera Kouphichnium or Limulicubichnus. The ichnospecies Kouphichnium rossendalensis and K. cordiformis are reassigned to this new ichnogenus. Principles of ichnotaxonomy of arthropod burrows are discussed and the trace fossil interpreted by analogy with the burrowing behaviour of living Limulus polyphemus. This is the first record of such a trace fossil from the Jurassic rocks of Britain.
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Romano et al. (1987) studied this question.