Hemiaster (Leymeriaster) eluvialis , a new echinoid from the late Maastrichtian of NE Belgium and SE Netherlands

Hemiaster (Leymeriaster) eluvialis sp. nov. from the Gulpen and Maastricht formations (late Maastrichtian, Belemnitella junior Zone) in the type area of the Maastrichtian Stage is described and illustrated. The new species is compared with other members of the subgenus Leymeriaster , and especially with H. (L.) maestrichtensis , which occurs in the same area. H. (L) eluvialis is interpreted as a descendant of the H. (L) moulinsanus - H. (L.) maestrichtensis group, showing a combination of paedomorphic and peramorphie traits. H. (L.) eluvialis made its first appearance in the Maastrichtian type... Mehr ...