[mtdewcmu]

That is a different sense. Totally different timescales, and dinosaurs were many species.

[netcan]

I think it captures the general fuzziness of it all. "Species" don't really exist. All the classifications and taxonomies are fuzzy, to various degrees. Even parent-offspring is a tricky concept.

Is the Tasmanian Devil facial cancer a new species? Did it evolve/mutate from tasmanian devils? Is it an offspring of a specific devil?