- Test medium-sized; profile low domal to subconical; rather thick-shelled
- Apical disc dicyclic (rarely with ocular 1 exsert); periproct subcircular with excentric opening and some larger periproctal plates. Genital plates with tubercles forming a ring around the periproct.
- Ambulacral plating trigeminate. Pore-pairs arranged in near vertical arcs forming a single adradial band. One primary tubercle to each compound plate close to pore zone plus a smaller perradial tubercle.
- Interambulacral plates with central primary tubercle and smaller secondary tubercles on either side. Smaller secondaries and miliaries over the remainder of the plate.
- Primary tubercles imperforate and distinctly crenulate.
- Large wedge-shaped pits along horizontal interambulacral sutures on either side of the primary tubercle extending in from triple suture junctions. Smaller triangular pits at ambulacral triple suture junctions down the perradius.
- Peristomial small with very feeble buccal notches.
- Spines short and simple.
- Lantern camarodont.
Recent; Indo-West Pacific.
Cidaris toreumatica Leske, 1778, p. 155, by original designation
- T. toreumaticus (Leske, 1778); Pliocene to recent, Indo-West Pacific.
- T. apodus (Agassiz & Clark, 1906); Recent, Indo-West Pacific.
- T. alexandri (Bell, 1884); recent, Australia and Malay archipelago.
- T. decipiens (de Meijere, 1904); recent, Indo-West Pacific
- T. hardwickii (Gray, 1855); Recent, China Sea and Japan.
- T. michaelsoni (Doderlein, 1914); Recent, Australia.
- T. reevesii (Gray, 1855); Recent, Indo-Pacific.
|Classification and/or Status
Euechinoidea; Camarodonta; Temnopleuroida; Temnopleuridae.
Distinguished from other coarsely ornamented temnopleurids by having obviously crenulate tubercles. Mortensen (1943) recognized Toreumatica as a subgenus for a subset of species with a highly eccentric periproct opening.
Mortensen, T. (1943) A monograph of the Echinoidea Part III.2, Camarodonta 1. C. A. Reitzel, Copenhagen.