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* ''Equilibrichnia'':<ref>Bromley, RG (1990) Trace fossils: biology and taphonomy. Unwin Hyman Ltd, London, 280 pp.</ref> burrows within the sediment that show evidence for organisms' responses to variations in sedimentation rate (i.e. the burrow moves upwards to avoid burial, or downwards to avoid exposure). Typically this evidence will be in the form of [[spreiten]], which are small laminations in the sediment that reflect previous positions the organisms were in.
* ''[[Fugichnia]]'':<ref>Simpson, S (1975) The morphological classification of trace fossils. In Frey, RW (ed.) The study of trace fossils. New York, Springer-Verlag, pp 39-54.</ref> "escape traces" that are formed as a result of organisms' attempts to escape burial in sudden high-sedimentation events like [[turbidity current]]s. The burrows are often marked with chevron patterns showing the upward direction the organisms were tunnelling.
* ''Praedichnia'':<ref>Ekdale, AA (1985) Palaeoecology of the marine endobenthos. Palaeogeography, Palaeoecology, Palaeoclimatology 50: 63-81.</ref> trace fossils that show evidence of [[predator]]y behaviour, such as the drill holes ([[bioerosion|borings]]) left in [[
Over the years several other behavioural groups have been proposed, but in general they have been quickly discarded by the ichnological community. Some of the failed proposals are listed below, with a brief description.
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