Lutetian genus extinctions

Pycnodus (from , 'dense' and 'tooth') is an extinct genus of ray-finned fish from the Eocene period. It is a wastebasket taxon, although many fossils from the Jurassic or Cretaceous are assigned to this genus, only the Eocene species, P. apodus is valid. As its name suggests, it is the type genus of Pycnodontiformes. thumb|left|Proscinetes bernardi, one example of pycnodont that was once assigned as Pycnodus The known whole fossils of Pycnodus are up to long, and have a superficial resemblance to angelfish or butterflyfish. The animals, as typical of all other pycnodontids, had many knob-like

Plastomenus is an extinct genus of turtle that inhabited western North America during the early Paleogene period.

Rhynchaeites (Greek for "beak fossil") is an extinct genus of wading bird, a stem-group threshkiornithid, which lived in Europe and North America during the Eocene epoch. The genus contains three species, R. messelensis, R. litoralis and R. mcfaddeni. It is one of the oldest members of the ibis family known from fossil remains.