The Echinoid Directory

Indiaster Lambert, 1920, p. 27

Diagnostic Features
  • Test cordiform, with wide, open, anterior sulcus; posterior face truncate. Test somewhat wedge-shaped in profile.
  • Apical disc ethmolytic with no gonopores (based on juvenile); subcentral to slightly posterior of centre.
  • Anterior ambulacrum sunken from apex. Pore-pairs well developed, with funnel-building tube-feet; arranged uniserially; rosette with radiating finger-like elements.
  • Petals well developed; sunken. The anterior pair long and flexed anteriorly, the posterior less than half the length and less strongly depressed.
  • Peristome anterior and facing more or less downwards.
  • Labrum mushroom-shaped and slightly longer than wide; not extending beyond first ambulacral plate.
  • Periproct on posterior truncate face.
  • Peripetalous fasciole present; passing around base of petals. Thin lateroanal fasciole present.
Distribution
Recent, Indian Ocean.
Name gender masculine
Type
Brisaster indicus Koehler, 1914, p. 201, by original designation.
Species Included
  • Only the type species.
Classification and/or Status

Spatangoida, Paleopneustina, Schizasteridae.

Subjective junior synonym of Brisaster Gray, 1855.

Remarks

Although Koehler originally placed his species indicus in the genus Brisaster, Lambert (1920) subsequently erected a new genus, Indiaster, to accommodate it. It supposedly differed on account of its paired petals being almost superficial. This is simply on account of the small size and immaturity of the material being described by Koehler (note this specimen has no gonopores open). Subsequently Lambert & Thiery (1924, p. 530) treated this as a synonym of Brisaster.

Koehler, R. 1914. Echinoderma of the Indian Museum, VIII, Echinoidea (i) Spatangides. Indian Natural History Museum, Calcutta: 257 pp., 20 pls