Multina arcuata Lima et Netto, 2012

Diagnosis. Multina with curved tunnels and tight network pattern, showing rare true branches and high density of overlapping.

Description. Irregular, curved cylindrical tunnels displayed horizontally on the bedding planes, whose trajectory forms open meanders. Burrow overlapping and constrictions are frequent and true branching, rare. Burrow margins delimited but without lining and compacted active burrow fill. Burrows are preserved in clusters in muddy beds, composing a tightly interlaced pattern of varied density, and occurring isolated in sandy beds. Burrow diameter ranges from 0.58 mm to 3.33 mm. Preservation in positive hyporelief.