The Echinoid Directory

Pseudoboletia Troschel, 1869, p. 96

Diagnostic Features
  • Test large and hemispheric to subconical; oral surface flat.
  • Apical disc hemicyclic; anal opening subcentral.
  • Ambulacral plating polygeminate, with four or five pore-pairs in a compound plate. Pore-pairs arranged in an arc on each plate.
  • Ambulacral plates each with single primary tubercle.
  • Interambulacral plates with primary tubercle and large secondary tubercles forming horizontal series.
  • Prominent naked bands interradially and perradially on the upper surface.
  • Buccal notches deep and divided by a longitudinal ridge.
  • Auricles joined perradially.
Recent; Indo-Pacific and Caribbean.
Name gender feminine
  Pseudoboletia stenostoma Troschel, 1869 [=Toxopneustes indianus Michelin, 1862], by original designation.
Species Included
  • P. indiana (Michelin, 1862); Recent, Indo-Pacific; littoral to 100 m
  • P. maculata Troschel, 1869; Recent, Indo-West Pacific, 20-70 m.
  • P. atlantica Clark, 1912; Recent, Ascension and St Helena; 20-70 m.
  • P. occidentalis Clark, 1921; Recent, Barbados.
Classification and/or Status

Camarodonta; Echinoida; Toxopneustidae.

Presumed monophyletic.


The deep buccal notches indicate this is a toxopneustid. Compared to Pseudocentrotus it has fewer pore-pairs to a plate (5 as opposed to 7 or 8) and has ambulacral zones less obviously into phyllodes adorally. Sphaerechinus has similar ambulacral plating, but that taxon has more numerous subequal interambulacral tubercles and no adapical naked zone in its interambulacra and ambulacra.

Mortensen, T. (1943) A monograph of the Echinoidea Part III.2, Camarodonta 1. C. A. Reitzel, Copenhagen.

Troschel, F. H. 1869. Sitzber. neiderrhein. Ges. Bonn. Verh. Nat. Hist. Ver. preuss. Rheinl. 26, p. 96.