猫の進化的起源と祖先は非常に複雑で多様なテーマである。考古学や生物学の文献によれば、猫の歴史は、少なくとも5000万年前に現在のインド近辺に生息していた古細菌にまで遡ることができる。
しかし、家猫は始祖鳥から直接進化したのではなく、数千万年という長い自然淘汰の過程を経て、人間主導で家畜化されたのである。猫汎白血球減少症ウイルスや猫コロナウイルスといった猫の病気は、その後に発生したものである。FPV&FCoV ）。
猫の進化の歴史を探る
As a species that once existed about 400 to 500 million years ago and is now extinct, the Palaeocat Beast's appearance is very different from that of modern cats. Archaeopteryx possessed primitive features such as an old body structure, a low, flat skull, a long, well-proportioned trunk and tail, and relatively short limbs. However, it is worth noting that despite its imperfect body structure, Archaeopteryx showed more advanced advantages in certain indicators such as muscle strength.
Research has proved that the direct ancestor of the cat was the small Archaeopteryx, and although they are commonly called "cats", they do not strictly belong to the feline family. More accurately, the small archaeopteryx was the most advanced of all the evolutionary branches of carnivores, small in appearance but with carnivorous blood in their veins, living in a way similar to today's mongoose or raccoon.
It is worth noting that, in the context of the large carnivore family, a species called the "fine-toothed beast" was quite influential in the Paleocene period. About 60 million years ago, this tiny, weasel-like animal had a long, slender, soft body but a thin, branched tail and short limbs. Although not a cat in the full sense of the word, the slender-toothed beast was a precursor to many of the mammals that exist today, such as bears, raccoons, muskcats, maned dogs, and even cats.
もうひとつの重要な動物群は、約4000万年前に栄えた剣歯虎で、基本的な意味では猫の前身といえる。残念なことに、さまざまな理由から、この威厳ある大型肉食動物は2万年前に地球上から姿を消し、現在では化石を通してしか、彼らが残した痕跡を記憶し、思い出すことはできない。
家猫とはどんな動物か？
Finally, let's delve into this particular mammal, the domestic cat. Widely known as the cat, it belongs to the carnivorous order Felineae, genus Felis. The domestic cat is a restricted animal that has been domesticated by humans and is a member of the feline family and is mainly concentrated in the subfamily Catidae.
家猫の雌雄はあまり変わらない。成猫のオスはメスに比べて頭部がやや膨らんでおり、体格もメスよりやや大きい。一般に、家猫は比較的スリムで洗練された体つきをしており、脂肪と力強い筋肉を持っている。しかし、鎖骨は比較的小さく未発達で、肩甲骨や胸骨と密接に連結することができない。頭部は丸みを帯び、体に対して大きく、マズルは短く突き出し、目は通常丸く、首はがっしりとして短く、四肢は比較的短く、大腿部は筋肉質で非常に重い。
要するに、古代の猫獣であれ、現代の飼い猫であれ、猫は長い進化の過程で独特の生活習慣と外見の特徴を形成し、人間の生活にとって欠くことのできないアシスタントであり、好ましい伴侶の一匹となったのである。
アンチジェンヌについて
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