Abstract
The fossil anomuran coprolite form-genera are defined by the type of the cross section of the longitudinal canals which pierce the fecal pellet. Arrangement and number of longitudinal canals within the 2 bilaterally symmetric groups of canals are the principal elements for the definition of form-species of anomuran coprolites. To-date the 4 thalassinid form-generaFavreina Bronnimann, 1955,Palaxius Bronnimann & Norton, 1960,Helicerina Bronnimann & Masse, 1968, andParafavreina Bronnimann, Caron & Zaninetti, 1972, and the single galatheid form-genusThoronetia Bronnimann, Caron & Zaninetti, 1972, have been established.
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