Toxopneustidae

Toxopneustidae

[‚täk·sə′nyü·stə‚dē]
(invertebrate zoology)
A family of Tertiary and extant echinoderms of the order Temnopleuroida where the branchial slits are deep and the test tends to be absent.
References in periodicals archive ?
Because we do not have access to a diverse set of planktotrophs from additional taxa, we cannot yet determine whether the ADL is present and functions similarly to lytechinids in enough taxa to distinguish between an echinoid apomorphy and that of smaller clades such as Toxopneustidae + Echinometridae.
Familia Toxopneustidae Troschel, 1872 Lytechinus varielegatus (Lamarck, 1816) Tripneustes ventricosus (Lamarck, 1816)
The Stirodonta is the sister taxon to the superorder Camarodonta, which includes the orders Temnopleuroida and Echinoida, the latter of which includes families Toxopneustidae, Strongylocentrotidae, Echinometridae, Echinidae, and Parechinidae.