Bioclaustration structures

Catellocaulata vallata Palmer et Wilson, 1988

Taxon description

Palmer & Wilson, 1988

Diagnosis: Bioclaustration structure in bryozoans, consisting of a group of pits sunk into the surface of zoarium. Pits c. 2 mm diameter, up to c. 2 mm deep; in plain view pit mouth  subcircular to oval with slightly to strongly fluted edges; pit walls may extend up above bryozoan surface to form low thickened rim around pit mouth. mature specomens consist of arrays of up yo thirty or more such pits; in centre af array, pits spacd evenly, c 2-3 mm apart; towards periphery, pits lie equispaced along strait or gently curving lines, each often terminating in a groove, c 2 mmwide, several millimetres long; groove shallows diatally so that outer end merges imperceptibly with surface of surrounding zoariu. Floors of adjacent pits along line joined by tunnels, c 2mm wide, 0,5 mm high. Lines increase in  number by bifurcation.

Type specimen data
: US National Museum, Smithsonian Institution USNM 419443 , , Newport, Kentucky
Synonymy list
1988     Catellocaulata vallata ichnosp. nov — Palmer & Wilson, fig. plate 87, text fig. 1-4
2005     bioclautration — Tapanila
Selection of related publications
Palmer, T. J., Wilson, M. A. 1988. Parasitism of Ordovician bryozoans and the origin of pseudoborings. Palaeontology 31, 4, 939-949.
References based on distribution