The species mentioned above are probably separate species from E.e. eschscholtzii. this separation occurred due to geographic isolation, where each group of E.e. eschscholtzii evolved creating new species. This type of speciation is called "ring species" and refers to an evolution that is capable of providing species with extremes of variation that are not intercrossed, due to geographic isolation.
The 3 smallest bones in the human body--malleus, incus, and stapes--are located in the middle ear. At 3 x 5 mm in size, the stapes is the smallest bone in the human body.
