Wendler et al., 2013
From dinoflaj3
Wendler, J.E., Wendler, I. and Haber, B.T., 2013: Revision and evaluation of the systematic affinity of the calcitarch genus Pithonella based on exquisitely preserved Turonian material from Tanzania. Journal of Paleontology, v.87, no.6, p.1077-1106.