Toxopneustidae
| Toxopneustidae | |
|---|---|
 | |
| Tripneustes gratilla | |
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Echinodermata |
| Class: | Echinoidea |
| Order: | Camarodonta |
| Infraorder: | Echinidea |
| Family: | Toxopneustidae Troschel, 1872 [1] |
Toxopneustidae is a family of globular sea urchins in the class Echinoidea.
Characteristics
[edit]All Camarodonts have imperforate tubercles and compound ambulacral plates. In addition, the Toxopneustids are characterised by the peristome, or opening through the test, having a sharp margin with the buccal notches being prominent. The tubercles lack the crenulations or ring of cog-like structures that articulate with the spines in certain other families. The Aristotle's lantern, or jaw apparatus, has the keeled teeth and the epiphyses united above the foramen magnum, the V-shaped gap between the hemipyramids that support the lantern's tooth.[2]
Genera
[edit]- Goniopneustes Duncan, 1889
- Gymnechinus Mortensen, 1903b
- Lytechinus A. Agassiz, 1863
- Nudechinus H.L. Clark, 1912
- Oligophyma Pomel, 1869
- Pseudoboletia Troschel, 1869
- Schizechinus Pomel, 1869
- Scoliechinus Arnold & H.L. Clark, 1927
- Sphaerechinus Desor, 1856
- Toxopneustes L. Agassiz, 1841b
- Tripneustes L. Agassiz, 1841b[1]
.jpg)
_edit.jpg)
References
[edit]- 1 2 Toxopneustidae World Register of Marine Species. Retrieved 2011-08-27.
- ↑ The Echinoid Directory The Natural History Museum. Retrieved 2011-08-27.
| National | |
|---|---|
| Other | |
