Finichnus Taylor, Wilson et Bromley, 2013

Attachment; substrate calcareous; tracemaker invertebrate

Category of architectural design: 2.77. Multiple attachment bioerosion traces.

(Leptichnus) Unbranched, cylelliptical, etching.

Unbranched, cylelliptical, etching.

Diagnosis. Groups of closely spaced small pits excavated in calcareous substrates. Each pit has a subcircular, elliptical, pyriform or pear-shaped opening, and is shallower than it is wide. All pits are excavated to approximately the same depth and all enter the substrate perpendicularly. Pit diameters range from 0·1mm to 0·9mm among specimens but are less variable within a specimen. Smaller pits occur at the centre of complete groupings and are interspersed elsewhere in some specimens. Pit sides may be vertical and pit bases flat, or sides sloping and transitional to a rounded pit base. Groups of pits may reach more
than 10mm in diameter or linear extent.

Diagnosis: Groups of closely spaced small pits excavated in calcareous substrates. Each pit has a subcircular, elliptical, pyriform opening and is less deep than it is wide. All pits are excavated to approximately the same depth and all enter the substrate perpendicularly. Smaller pits occur at the center of complete groupings and are interspersed elsewhere in some specimens. Pit sides may be vertical and pit bases flat, or sides sloping and transitional to a rounded pit base (after Taylor et al.,1999).