Do Waldsteinia and Obregonia contain the same number of species?
Obregonia Obregonia, the artichoke cactus, is a genus of cacti with a single species, Obregonia denegrii. The species is endemic to the state of Tamaulipas in Mexico.
Smithsonidrilus multiglandularis Smithsonidrilus multiglandularis is a species of clitellate oligochaete worms, first found in Puerto Rico and Florida.