Which has more species, Cheiridopsis or Dietes?
Cheiridopsis Cheiridopsis is a genus that consists of 100 flowering succulent perennial plants, native to semi-arid regions in the far west of Namibia and South Africa.
Xiphosura The Xiphosura are an order of marine merostome chelicerates that includes a large number of extinct lineages and only four extant species in the family Limulidae, which includes the horseshoe crabs. The group has hardly changed in millions of years; the modern horseshoe crabs look almost identical to prehistoric genera such as the Jurassic "Mesolimulus", and are considered to be living fossils. The most notable difference between ancient and modern forms is that the abdominal segments in present species are fused into a single unit in adults.