Plenty, if you allow illustrations in physical publications to some extent.
There are a number of mollusk species in basal Pleistocene deposits (Busycon cf. carica, or Neoterebra cf. dislocata e.g.), which I have personally collected, that are distinctly transitional between species from mid-Pliocene deposits (B. maximum, and N. indenta to continue those examples), which my grandfather has collected and illustrated, and recent species (standard B. carica and N. dislocata), which one can find plenty of images of in many volumes on recent east coast mollusks.
If one looks at one of Ed Petuch’s publications documenting a series of “species” (what everyone else calls “varieties”) over time, then one can see another example. His volume describing Pyruella comes to mind. Some of Emily Vokes’ Tulane Studies papers on muricids also give good examples.