The Echinoid Directory

Haimea Michelin, 1851, p. 92

[=Bonaireaster Pijper, 1933, p. 85, type species Bonaireaster rutteni Pijpers, 1933, p. 85; =Pauropygus Arnold & Clark, 1927, p. 30, type species Pauropygus platypetalus Arnold & Clark, 1927 ]

Diagnostic Features
  • Test of medium size, elongate to circular in outline, inflated to highly inflated; adoral surface rounded.
  • Apical system subcentral, monobasal, with four gonopores. Genital pores show sexual dimorphism (larger in females).
  • Petals well developed, open, anterior petal III longest, posterior pair (V & I) shortest. Pores strongly conjugate, equal number of pores in pores series in the same petal. Ambulacra beyond petals composed of primary plates, demiplates, and in some species included plates; demiplates and included plates small, thin, not reaching interior of test, absent near peristome.
  • Peristome subcentral, opening subpentagonal, flush or sunken to a variable degree but with walls of invagination steep so that the sunken zone is not much larger than the peristome. Interambulacral zones bordering the opening weakly convex in some species.
  • Periproct typically inframarginal, but varies from marginal to near the peristome.
  • Buccal pores present on edge of peristome.
  • Tubercles small, irregularly arranged both adorally and adapically.
Distribution
Middle to Late Eocene of northwest Africa, Peru, the West Indies and the Caribbean.
Name gender feminine
Type
Haimea caillaudi Michelin 1851, p. 92; by original designation.
Species Included
  • H. alta (Arnold & Clark, 1927); Middle Eocene, Jamaica.
  • H. caillaudi Michelin 1851; Middle-Late Eocene, Jamaica.
  • H. convexa (Arnold & Clark, 1927); Middle Eocene, Jamaica.
  • H. cylindrica (Arnold & Clark, 1927); Middle-Late Eocene, Jamaica, Anguila.
  • H. elevata (Arnold & Clark, 1927); Middle Eocene, Jamaica.
  • H. meunieri (Lambert, 1907); Middle Eocene, Senegal.
  • H. ovumserpentis (Guppy, 1866); Upper Eocene, Trinidad.
  • H. parvipetala (Arnold & Clark, 1927); Middle Eocene, Jamaica.
  • H. platypetala (Arnold & Clark, 1927); Middle Eocene, Jamaica.
  • H. pyramidoides (Arnold & Clark, 1927); Middle Eocene, Jamaica.
  • H. rugosa (Arnold & Clark, 1927); Middle Eocene, Jamaica.
  • H. rutteni (Pijpers, 1933); Late Eocene, Bonaire.
Classification and/or Status
Irregularia; Neognathostomata; stem group Clypeasteroida; Oligopygidae.
Remarks

Haimea is similar to Oligopygus except that in Oligopygus the opening of the peristome is situated in a deep transverse trough, much wider than the actual peristome, while in Haimea the peristomal opening is smaller and more pentagonal, and is either flush or sunken with the invaginated zone steep-walled and not much larger than the peristome. The plate sutures in Oligopygus are reported to be corrugated, but smooth in Haimea (Kier, 1967, p. 52).

Kier, P. M. 1967. Revision of the oligopygoid echinoids. Smithsonian Miscellaneous Collections, 152 (2), 149 pp., 36 pls.

Michelin, H. 1851. Description de quelques nouvelles especes d'Echinides. Revue et Magazin de Zoologie, serie 2, 3, p. 92.