Other xcrophytes again are spinous.
The ordinary leaves may be small, absent, or spinous.
In rare cases the right and left preacetabular blades fuse with each other above the spinous processes.
In this family there is often a marked divergence between the sexes; the terminal antennal segments are larger in the male than in the female, and the males may carry large spinous processes on the head or prothorax, or both.
Their scales are generally rough and spinous; but otherwise they possess no strikingly distinguishing peculiarity, unless the loose skin of their throat, which is transversely folded and capable of inflation, be regarded as such.