Coptocampylodon lineolatus Elliott, 1963

Description: Solid short cylindrical calcareous bodies (units), up to 3.0mm in length (incomplete) and varying from about 0.25 to 1.0mm in diameter. The longer axis of the unit is gently curved or slightly irregular: the ends, when not obviously broken, are irregularly rounded. The outer surface, itself usually smooth, but in some examples showing a weak transverse lamination, is deeply incised by parallel equidistant longitudinal grooves, from five to eight in number. In transverse section these grooves are seen to widen inwards and often to be near-circular in cross-section, with an internal diameter of 0.04-0.05mm. Circular transverse sections of the whole unit are notched by the grooves and have the appearance of a coarse, sparsely spoked cog-wheel or of a stellate structure with truncated rays. Longitudinal sections show the parallel, matrix filled grooves, either curved or passing out of the plane of the section owing to their irregularity.”