Esconites is a genus of eunicid polychaete known from concretions in the Carboniferous Mazon Creek biota (Essex fauna).[1]
It reaches 4–14 cm in length and has 23-80 segments and distinctive jaw elements.
Notes and References
Thompson, I., & Johnson, R. G. (1977). New fossil polychaete from Essex, Illinois. Fieldiana. Geology, 33(25), 471–487. http://doi.org/10.5962/bhl.title.5176