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Diagnostic Features
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- Test medium-sized; inflated in profile with rounded ambitus; flattened above and below.
- Apical disc dicyclic, with gonopores close to the outer margin; inner region of genital plates tuberculate, forming a semi-regular ring around the periproct. Perirproct subcircular; periproct plates small and undifferentiated.
- Ambulacral plating trigeminate. Pore-pairs arranged with the middle pore-pair (on the occluded plate) adradial to the other two; forming a single adradial band. Not expanded adorally and no pore-crowding close to the peristome.
- Two subequal tubercles on each ambulacral plate.
- Wide perradial and interradial naked zones developed from apex to well beneath the ambitus.
- Small angular pits at sutural triple points on perradius and interradius; horizontal sutures without pits.
- Interambulacral plates with tuberculation confined to adradial margin from ambitus aborally. Central primary tubercle small and flanked by subequal tubercles latterally and above.
- Primary tubercles imperforate and non-crenulate.
- Peristomial with almost no buccal notches.
- Lantern camarodont.
- Spines small and simple.
- Globiferous pedicellariae with broad blade.
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Distribution
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Recent; Indo-West Pacific. |
| Name gender |
unknown |
| Type |
Echinus globulus Linnaeus, 1758, p. 664, by original designation. |
| Species Included |
Only the type. |
| Classification and/or Status |
Euechinoidea; Camarodonta; Temnopleuroida; Temnopleuridae.
Monotypic.
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| Remarks |
Distinguished by its broad naked perradial and interradial zones from most other temnopleurids. Distinguished from Microcyphus by having interambulacral plates that are much wider than tall.
Mortensen, T. 1943. A monograph of the Echinoidea Part III.2, Camarodonta 1. C. A. Reitzel, Copenhagen.
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