Osborn 1902 on dolichocephaly and brachycephaly
Osborn 1902 wrote:
“Dolichocephaly and brachycephaly are familiar terms in anthropology. The cephalic index, or ratio of breadth to length, marks a profound distinction between different races of man; it is one of the most stable of all racial characters, although no satisfactory theory or explanation of what it signifies has thus far found general acceptance among anthropologists.”
Has this been updated in the last 120 years?
Figure 1. Osborn 1902 illustrated these two human skulls in dorsal view illustrating his point on brachycephaly and dolichocephaly.
” data-medium-file=”https://pterosaurheresies.wordpress.com/wp-content/uploads/2025/10/homo.sapies.skull_.dorsal588.jpg?w=300″ data-large-file=”https://pterosaurheresies.wordpress.com/wp-content/uploads/2025/10/homo.sapies.skull_.dorsal588.jpg?w=584″ class=”size-full wp-image-94932″ src=”https://pterosaurheresies.wordpress.com/wp-content/uploads/2025/10/homo.sapies.skull_.dorsal588.jpg” alt=”Figure 1. Osborn 1902 illustrated these two human skulls in dorsal view illustrating his point on brachycephaly and dolichocephaly. ” width=”584″ height=”486″ srcset=”https://pterosaurheresies.wordpress.com/wp-content/uploads/2025/10/homo.sapies.skull_.dorsal588.jpg?w=584&h=486 584w, https://pterosaurheresies.wordpress.com/wp-content/uploads/2025/10/homo.sapies.skull_.dorsal588.jpg?w=150&h=125 150w, https://pterosaurheresies.wordpress.com/wp-content/uploads/2025/10/homo.sapies.skull_.dorsal588.jpg?w=300&h=249 300w, https://pterosaurheresies.wordpress.com/wp-content/uploads/2025/10/homo.sapies.skull_.dorsal588.jpg 588w” sizes=”(max-width: 584px) 100vw, 584px” />
Figure 1. Osborn 1902 illustrated these two human skulls in dorsal view illustrating his point on brachycephaly and dolichocephaly. Captions added to clarify.
“After accumulating a great number of facts on the evolution of this baffling group the correlation of long limbs with long skulls (dolichopody and dolichocephaly) and short limbs with short skulls (brachypody and brachycephaly) suddenly appeared as a key, and was expressed in the following statement.”
The LRT scores skulls as narrow (<1.2), medium (1.2 to 2.0) and wide (>2.0).
Figure 2. Three titanothere skulls in dorsal view illustrating dolichocephaly and brachycephaly.
” data-medium-file=”https://pterosaurheresies.wordpress.com/wp-content/uploads/2025/10/titanotheres588.jpg?w=300″ data-large-file=”https://pterosaurheresies.wordpress.com/wp-content/uploads/2025/10/titanotheres588.jpg?w=584″ class=”size-full wp-image-94933″ src=”https://pterosaurheresies.wordpress.com/wp-content/uploads/2025/10/titanotheres588.jpg” alt=”Figure 2. Three titanothere skulls in dorsal view illustrating dolichocephaly and brachycephaly. ” width=”584″ height=”463″ srcset=”https://pterosaurheresies.wordpress.com/wp-content/uploads/2025/10/titanotheres588.jpg?w=584&h=463 584w, https://pterosaurheresies.wordpress.com/wp-content/uploads/2025/10/titanotheres588.jpg?w=150&h=119 150w, https://pterosaurheresies.wordpress.com/wp-content/uploads/2025/10/titanotheres588.jpg?w=300&h=238 300w, https://pterosaurheresies.wordpress.com/wp-content/uploads/2025/10/titanotheres588.jpg 588w” sizes=”(max-width: 584px) 100vw, 584px” />
Figure 2. Three titanothere skulls in dorsal view illustrating dolichocephaly and brachycephaly.
“finally all these data were put together and the conclusion was reached again, inductively,
that dolichocephaly and brachycephaly are among the dominating factors in the skull of the Tiianotheres, and that they are probably correlated with similar proportions in the trunk and limbs.”
In titanotheres (Fig 2), the splitters had their way, dividing the three skull types into three different genera. Has this been updated in the last 120 years?
References
Osborn HF 1902. Article 7. Dolichocephaly and Brachycephaly in the lower mammals. Agricultural Research Insititue PUSA. Bulletin of the American Museum of Natural History 16:77–90.
Source: https://pterosaurheresies.wordpress.com/2025/10/17/osborn-1902-on-dolichocephaly-and-brachycephaly/
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