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Hemiaster (Leymeriaster) eluvialis, a new echinoid from the late Maastrichtian of NE Belgium and SE Netherlands
Van der Ham, R.W.J.M. (1995). Hemiaster (Leymeriaster) eluvialis, a new echinoid from the late Maastrichtian of NE Belgium and SE Netherlands. Bull. Kon. Belg. Inst. Natuurwet. Aardwet. = Bull. - Inst. r. sci. nat. Belg., Sci. Terre 65: 153-164
In: Bulletin van het Koninklijk Belgisch Instituut voor Natuurwetenschappen. Aardwetenschappen = Bulletin de l'Institut Royal des Sciences Naturelles de Belgique. Sciences de la Terre. KBIN: Brussel. ISSN 0374-6291, more
Peer reviewed article  

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Keywords
    Maastrichtian; Echinoidea [WoRMS]; Hemiaster Desor in Agassiz & Desor, 1847 † [WoRMS]; Belgium, Liège (Province) [Marine Regions]; Belgium, Limburg [Marine Regions]; Netherlands, Limburg (Province); Marine
Author keywords
    Echinoidea, Hemiaster, Belgium, The Netherlands, late Maastrichtian

Author  Top 
  • Van der Ham, R.W.J.M.

Abstract
    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 area during deposition of the Lanaye Member (top Gulpen Formation), while H. (L.) maestrichtensis, the only other representative of the subgenus Leymeriaster in the area, appeared later (Emael Member, Maastricht Formation).

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