Nihilichnus fissuratus Lages, Carneiro, Andrade, Silva et Perini, 2025

Diagnosis: Puncture (Nihilichnus) displaying associated longitudinal fracture(s) that resemble fissures. The perforation may display a subtriangular, lenticular, ellipsoid, polygonal, rounded, or irregular outline and could be a pit, displaying a median keel or not, or a puncture/hole, displaying vertices or not. The fractures frequently reach the inner tissues and inner cavities of a hard/firm biogenic substrate. The fissures may break the substrate into one or more parts around the perforation. The bone fractures/fissures could display a cranioventral or an anteroposterior orientation (passing throughout the perforation), diverge from a part of the perforation (cranially, ventrally, anteriorly, or posteriorly oriented), or diffusely diverge from the perforation (multiple fractures, having different sizes, shapes, depths, and orientations).