Cthris
said
:
Lol because labeling all the breeds of dogs as the same species but excluding coyotes and wolves makes tons of sense, is well defined and not arbitrary at all
Funnily enough, my preferred taxon of study is (fossil) canids. Coyotes, wolves, and domestic dogs are all genus
Canis
, and share a common ancestor. Wolves are a sister taxon to dogs, and the two share a common ancestor with each other not shared by coyotes (
Canis latrans
). Domestic dogs are more closely related to one another than any are to wolves (excluding wolf-dogs) despite the morphological variance. Domestic dogs have not been divided into separate species because morphologically distinct phenotypes regularly interbreed (because domestic animal breeding is controlled by humans). Though
C. lupus
and
C. familiaris
can produce viable offspring, under normal conditions their populations do not interbreed and so they are not the same species.
Overall, taxonomy aims for a very well defined goal these days: a series of classification bins that form monophyletic clades (common ancestor and all descendants). Remaining Paraphyletic clades (common ancestor and some descendants, but not others) are mostly those that have been grandfathered in, like Aves and Reptilia. Many of those are being slowly moved into intermediate taxon steps to make taxonomy more consistent in purpose. The only huge disjoint in taxonomy (and species concept) is where the biologic species concept (the default used for extant, observable species) breaks down in the fossil record (where we have to return to some morphological species concept by necessity).
Taxonomy contributes greatly to my work, in its modern form it traces the outline of how lineages split, die out, and evolve. A map of life, albeit one that has a lot of gaps in it.
I also bristle at the idea that only physics (and chemistry?) can count as 'real science.'
22-Mar-2017 20:40:43
- Last edited on
22-Mar-2017 20:58:31
by
Rifleavenger