Genus and Species are just words we use to basically be scientifically racist. What is classification but racism. Who is to say what genes can cross.
Its for categorization purposes numb nuts. The fact that caucasoids mongoloids and africoids are different in features is why they were classified. How is it racist to note these differences and categorize them for scientific purposes?
Caucasoid: Caucasoid skulls have a nasal sill. This nasal sill (or dam) can usually be found inside the nasal opening. Caucasoids have a face that comes to a point along the midline. Their cheek bones don't extend forward. They have retreating zygomatics. This is where the facial features below the nose are retreated back into the skull and are flatter from the chin to below the nose. Caucasoids often have a long narrow face, a narrow nasal opening, depressed nasal root, and a narrow high bridge for the nose.
Africoid (Negroid) skulls don't have a nasal sill. Their skull exhibits prognathism, which is the oposite of the Caucasoidal retreating zygomatcs. Their mouth protrudes outward. They have little or no nasal depression, a rounded forehead, bregmatic depression, a wide nasal opening, and often have an almost ivory texture to the bone.
Mongoloid: Mongoloid skulls are between to two extremes with the nasal sill. Mongoloids havea much flatter face than Caucasoids, and the cheek bones extend further forward.
Their faice is also moonlike. They have an edge to edge bite. Many American Indian incisor teeth have occlusal wear (older skulls that is). Mongoloids also have shovel-shaped incisors and in some cases they are turned slightly to the midline. Often the zygomatic bones dip below the edge of the maxilla, and they have a nasal overgrowth (the nasal bones project forward past where it meets with the front part of the maxilla).
One starred.
