Role of environment in classification

[jakob]

I am rather new to taxonomical classification, but couldn't cranial dystrophy (something the majority of modern humans have, to varying degrees) influence classification (or rather, misclassification)? EG. someone lacking robustness and with maxillary downgrowth being interpreted as being phenotypically gracile and dolichocephalic, even if their genetics would manifest differently with a healthier early-life environment. Or should classification be based on ones' morphology no matter what?
Apologies if this has already had a thread dedicated to it. I couldn't find anything searching for it.

[masoebu]

Yes people have brought this up before but the point gets lost in the sea of weird classification schemes and pseudophenotypes.

People should relax rigid categories to account for normal and abnormal variation within a racial type, to the extent that the type exists.

As you may be familiar, recessed jaws often go hand in hand with a recessed infraorbital/malar area, but other times they're isolated deformities. If it is a more general deformity across the face/head, smaller eye sockets could be a corresponding feature, resulting in more protruded eyes.

Siblings technically of the same type could look dramatically different due to dento-facial deformities caused by Zeus knows what.

[lei.talk]

an individual's classification
is based on that individual's metrics.

obvious outliers
such as persons that have required reconstructive surgery
after injury

or display other deformity
caused by starvation et cætera — are recognisably outliers.

notice the cephalic index, for example, has a range for each type.

all of the metric categories do.

computer programs that analyse genetic samples
and produce corresponding images/predictions —
offer a range of physical manifestation

which fall within the boundaries of a recognisable idealtypus.

obviously,
if my twin brother were locked in a small closet
and fed only peas porridge his entire life —

he would little resemble athletic me
ingesting raw liver mixed with raw fertile eggs
fresh from my original vintage vita-mix 3600 blender
every two hours.