The Echinoid Directory

Caenopedina mirabilis (Döderlein, 1885)
  • Common name: -
  • Systematics: Pedinidae, Pedinoida
  • Distribution: Japan
  • Diet: Omnivorous scavenger, algae, sponges, bottom material with foraminiferans & shells
  • Feeding type: -
  • Habitat: -
  • Depth range: -
  • Maximum test size: -
  • Behaviour: -
3D model (interactive)
3D model (static)
MRI pictures
Illustrations from literature
More pictures
Technical information
  • Specimen ID: USNM 31182 Smithsonian National Museum of Natural History, Washington D.C.
  • Expedition: Northwestern Pacific Expedition, R/V “Albatross”
  • Collected in: 1906, South of Shirahama, Kii Strait, Honshu Island, Wakayama, Japan, 349 m
  • Collected by: -
  • Identified by: H. L. Clark
  • Specimen test size: 1.5 cm
  • Scanning location: Berlin 7T
  • Scanning solution: Aqua dest. + Magnevist
  • MRI dataset resolution: (81 µm)3
Literature cited
  • Clark, H. L. 1912. Hawaiian and other Pacific Echini. The Pedinidae, Phymosomatidae, Stomopneustidae, Echinidae, Temnopleuridae, Strongylocentridae and Echinometridae. Memoirs of the Museum of Comparative Zoology 34(4).
Addenda
  1. Recent analyses (Holland & Ghiselin 2008) have unequivocally demonstrated that this species does not possess - as indicated in the 3D models presented here - a siphon tube. Instead, this species is characterized by a so-called siphonal groove, i.e. a groove within the stomach rather than a separate tube. The structure indicated here as a siphon is in fact a haemal structure adjoining the stomach, the so-called inner marginal sinus.
  • Holland, N.D. & Ghiselin, M.T. 2008. Siphons and siphonal grooves in the
    digestive systems of the Echinoidea (Echinodermata). Zoomorphology 127:
    259-264.