Usage patterns
〈物〉は〈物〉の一種だX is a kind/type of Y
Dolphins are a kind of whale.
この種の〈事〉this kind/type of ~
This kind of problem is common.
新種が発見されるa new species is discovered
A new species of fish was discovered in the deep sea.
種が絶滅するa species goes extinct
Many species are at risk of extinction.