Petroxestes Wilson et Palmer, 1988

2.65. Pouch borings

Unbranched, groove.

Remark: Shallow to deep boring with elongate outline and rounded base.

Diagnosis. —Shallow to deep, elongate borings in lithic sub­strates; rounded ends and parallel, slightly convex, or slightly concave sides in plan view; rounded bottoms in longitudinal and transverse section; sides parallel or slightly divergent down­ wards in deeper specimens; length up to 30 mm; several times as long as wide.