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Heliophora orbiculus

Heliophora orbiculus
Description de cette image, également commentée ci-après
Heliophora orbiculus au NHM de Londres.
Classification Catalogue of Life
Règne Animalia
Embranchement Echinodermata
Classe Echinoidea
Ordre Clypeasteroida
Sous-ordre Scutelloida
Infra-ordre Scutelliformes
Famille Rotulidae

Genre

Heliophora
L. Agassiz, 1840[1]

Espèce

Heliophora orbiculus
(Linnaeus, 1758)[2]

Synonymes

  • Echinocyamus crenulatus H.L. Clark, 1925[3]
  • Echinodiscus dentatus minor Leske, 1778[3]
  • Echinodiscus dentatus Leske, 1778[3]
  • Echinus decadactylos Gmelin, 1791[3]
  • Echinus orbiculus Linnaeus, 1758[3]
  • Heliophora orbicularis (Linnaeus, 1758)[3]
  • Heliophora rumphii (L. Agassiz, 1841)[3]
  • Radiorotula orbiculus (Linnaeus, 1758)[3]
  • Rotula dentata (Leske, 1778)[3]
  • Rotula rhumphii[3]
  • Rotula rumphii Klein, 1734[3]
  • Rotula rumphii L. Agassiz, 1841[3]
  • Scutella dentata (Leske, 1778)[3]
  • Scutella radiata Blainville, 1834[3]
  • Scutella semisol Blainville, 1827[3]

Heliophora orbiculus est une espèce d'oursins clypéastéroïdes de la famille des Rotulidae. Sa coquille est aplatie, circulaire et ornée d’une étoile. C'est la seule espèce actuelle du genre Heliophora, qui remonte au Pliocène supérieur[4].

Systématique

L'espèce Heliophora orbiculus a été initialement décrite en 1788 par le naturaliste suédois Carl von Linné (1707-1778) sous le protonyme d’Echinus orbiculus[1].

En 1840, le zoologiste suisse naturalisé américain Louis Agassiz (1807-1873) la classe sous le genre Heliophora[1].

Caractéristiques

Vivant, son corps est recouvert de fines et courtes épines mobiles, comme un duvet, qui lui donnent une couleur gris pourpre et lui permettent de s’enfouir dans le sable.

Fossiles du Pliocène du Maroc attribués à Heliophora.

Répartition

On trouve cette espèce le long de la côte ouest de l'Afrique.

Liste des sous-espèces

Selon Catalogue of Life (30 septembre 2018)[2] :

  • sous-espèce Heliophora orbiculus angolensis Goncalves & Roman, 1963

Notes et références

Liens externes

Sur les autres projets Wikimedia :

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