Or without the 'a' in American sources... such as the one referenced here...
This University of Berkeley classification is useful in showing the different sub-disciplines.
Paleontology is traditionally divided into various sub-disciplines:
Micropaleontology: Study of generally microscopic fossils, regardless of the group to which they belong.
Paleobotany: Study of fossil plants; traditionally includes the study of fossil algae and fungi in addition to land plants.
Palynology: Study of pollen and spores, both living and fossil, produced by land plants and protists - this is very important in climate change research for reconstructing past climates from lake bed sediments etc.
Invertebrate Paleontology: Study of invertebrate animal fossils, such as mollusks, echinoderms, and others.
Vertebrate Paleontology: Study of vertebrate fossils, from primitive fishes to mammals.
Human Paleontology (Paleoanthropology): The study of prehistoric human and proto-human fossils.
Taphonomy: Study of the processes of decay, preservation, and the formation of fossils in general.
Ichnology: Study of fossil tracks, trails, and footprints.
Paleoecology: Study of the ecology and climate of the past, as revealed both by fossils and by other methods.
In short, palaeontology is the study of what fossils tell us about the ecologies of the past, about evolution, and about our place, as humans, in the world. Palaeontology incorporates knowledge from biology, geology, ecology, anthropology, archaeology, and even computer science to understand the processes that have led to the origination and eventual destruction of the different types of organisms since life arose.
A useful summary, and elements of these sub-disciplines would I imagine be included in any draft specification once it emerges.
Image: Fossil from Staithes cliffs, North Yorkshire - Alan Parkinson, shared on Flickr under CC license.
