Spongelimorpha Saporta, 1887

Diagnosis: Cylindrical to elliptical, predominantly horizontal burrow systems, showing Y-shaped and/or rarely T-shaped branching; with subordinate sub-vertical and vertical elements. Burrow wall lined or unlined; when lined, distinctly lined with agglutinated sediment; exterior smooth, knobby, or with sub-parallel longitudinal or crossing ridges. Meniscate backfill structures and/or spreite structures may be subordinately present.