Isopodichnus
Encyclopedia
Isopodichnus is an ichnogenus of trace fossil. Ribbon-like in form, Isopodichnus traces were likely formed by the activity of an isopod crustacean
foraging within the preserved sediment. Parallel to the bedding plane, a central furrow is flanked by two hypichnial ridges. Trails may also exhibit scratch marks and be associated with Rusophycus
-like resting traces. Isopodichnus are very similar in form to Cruziana
traces, making delineation of the two forms difficult, and controversial http://books.google.co.uk/books?id=ngZI35A1os0C&pg=PA182&dq=Isopodichnus&as_brr=3&client=firefox-a.
Crustacean
Crustaceans form a very large group of arthropods, usually treated as a subphylum, which includes such familiar animals as crabs, lobsters, crayfish, shrimp, krill and barnacles. The 50,000 described species range in size from Stygotantulus stocki at , to the Japanese spider crab with a leg span...
foraging within the preserved sediment. Parallel to the bedding plane, a central furrow is flanked by two hypichnial ridges. Trails may also exhibit scratch marks and be associated with Rusophycus
Rusophycus
Rusophycus is a trace fossil allied to Cruziana. Rusophycus is the resting trace, recording the outline of the tracemaker; Cruziana is made when the organism moved...
-like resting traces. Isopodichnus are very similar in form to Cruziana
Cruziana
Cruziana is a trace fossil consisting of elongate, bilobed, approximately bilaterally symmetrical burrows, usually preserved along bedding planes, with a sculpture of repeated striations that are mostly oblique to the long dimension...
traces, making delineation of the two forms difficult, and controversial http://books.google.co.uk/books?id=ngZI35A1os0C&pg=PA182&dq=Isopodichnus&as_brr=3&client=firefox-a.