I hate to nit pick but I think it’s reasonable to assert that every fossil ever found and every living thing on this planet is transitional to some degree or other.
Overwhelmingly, species disappear from the fossil record in the same form that they appear in the fossil record. Even archaeopteryx is not exempt. All examples of it look the same.
The fossil record demonstrates stasis in species; the exact opposite of what Darwin predicted.
This is what lead Gould to postulate macroevolution.