Haccourtaster aemstelensis Jagt 2000

Haccourtaster aemstelensis Jagt, 2000 Fig. 2A–K 2000 Haccourtaster aemstelensis Jagt: p. 408, pl. 27, figs 1–6. 2005 Haccourtaster aemstelensis Jagt: Žítt, p. 226. Type material. An ultimate superomarginal figured by Jagt (2000, pl. 27, fig. 1) is the holotype (NHMM MB 1044- 6/c) and other marginals illustrated by Jagt (2000, pl. 27, figs 2–5) are paratypes (NHMM MB 1044-6d–f), basal Zeven Wegen Member (Gulpen Formation), lowermost upper Campanian, Haccourt, northeastern Belgium. Diagnosis. A small Haccourtaster (R estimated to have been 5 mm) in which the external surfaces of the marginals bear deeply impressed, large, closely spaced granule pits separated by rugosities on the abactinal surfaces of the superomarginals and the actinal surfaces of the inferomarginals. Additional material. Eight additional marginals from the same horizon and locality as the type material (NHMM JJ 16614). Remarks. Haccourtaster aemstelensis differs from all other species of the genus in its possession rugose marginal ossicles and deeply impressed granule pits of variable size.