Nannotax Enabling nannofossil research

Description: Like A. primus but angular; right arm with rodded keel and longer than left.

Range: NN11B (restricted to short interval within NN11B).

Alternative combination:

Nicklithus amplificus (Bukry and Percival, 1971) Raffi Backman & Rio 1998.

Raffi et l. (1998) presented evidence that A. primus and A. amplificus eveloved independantly from Triquetrotrhabdulus and so proposed a new genus, Nicklithus (in honour of N Shackleton) for A. amplificus. I have followed the conventional nomenclature here, but comments on this are welcome (JRY).

Synonym:

C. dentatus Bukry, 1973.