Fossils The Essential Guide

The opening of Fossils: The Essential Guide sets the tone as to who the intended audience is, with invertebrate palaeontologist Paul D. Taylor pointing out that palaeontology and archaeology are not the same thing. This is intended as a book for general readers who are interested but lack relevant background knowledge. Part of the long-running publishing programme of the London Natural History Museum (NHM), this is a whistlestop tour of life's diversity as revealed by the fossil record. My take is that "It is good, but...", as I feel the formula somewhat restricts it from being the accessible and thus truly essential guide that it wishes to be.

This guide has several things going for it. For one, its coverage is balanced. Fossils are obviously about much more than dinosaurs; they feature, but appropriately enough get just four pages in the chapter on archosaurs. Instead, Taylor covers the whole tree of life, with six chapters on invertebrates and three on vertebrates. Add to that a useful introduction, and dedicated chapters on plant fossils, microfossils, and trace fossils. This book runs the full gamut of relevant topics. As a bonus, his interest in fossil folklore means he adds references to the role of fossils in beliefs, myths, and material culture, including the wonderful world of pavement palaeontology: spotting fossils in the building stones used in e.g. pavements, floors, or columns.

Some of what people think they know about fossils and palaeontology will be outdated or outright mistaken. The book's second strong suit is thus that Taylor incorporates modern thinking and the latest developments. Mentioning for instance the debate around the nature of the Cambrian Explosion (was it really?), adopting modern taxonomical concepts (Pancrustacea and mammalian superorders), including the revised size estimate for the well-known placoderm fish Dunkleosteus, and reminding readers that e.g. horse and human evolution were not single-lineage affairs leading to modern forms, but complex, branching processes with plenty of dead ends. He highlights important related concepts, such as convergent evolution or uniformitarianism. Lastly, the chapter on microfossils is really well written, explaining their importance and utility in stratigraphical correlation of rocks, and detailed tracking of past ecological, climatological, and evolutionary changes.

That said, there are a few places where I feel Taylor misses a beat and could have done more to emphasize points that are frequently confused. He mentions the concept of paraphyly when pointing out that fish is what remains after you have removed all the other vertebrate groups. So why not mention polyphyly when you point out that corals or worms are not a single taxonomic group? He similarly does not mention the concept of exaptation, even as he gives an example of it. The bony fish Tiktaalik did not evolve lungs to conquer the land but likely to deal with oxygen-poor waters, only to later repurpose these structures. More could have been made of the different species concepts used in palaeontology. Even as he highlights how species names for plant and trace fossils work very differently, he does not contrast this with the biological and morphological species concepts. Finally, in a book for a general audience, it is worth reminding them that the beautiful photos do not reflect how fossils are pulled out of the ground! Each of these has been worked on by skilled preparators whose contributions are all too often overlooked. Taylor inserts only three boxes to briefly explore related topics, and I think there could have been more of them.

Though I liked the book, I admit that, even as an evolutionary biologist with more than a passing interest in palaeontology, I struggled with some of the chapters on invertebrates, particularly chapters 5–7 that cover numerous lesser-known groups besides trilobites and ammonites. To explain why, I must go on a diversion, so bear with me.

The NHM has a long history of publishing popular books on palaeontology and evolutionary biology that are readily available in its gift shop, as well as in the wider book trade. All these books follow a pretty rigorous brief: they are limited in extent, have to be affordable, and frequently draw on both the expertise of the museum's research staff for the writing, and its extensive collections of natural history objects for the photography. Comparing publicly available internal images for them shows a certain repetition, suggesting the museum is drawing on an image bank during production.

The point of the above diversion is that I feel this formulaic approach somewhat restricts this book when it comes to the chapters on invertebrates. These are organisms that are unfamiliar to most people, myself included, as we just do not encounter them in our daily lives. Much of the text here is spent describing their anatomy and morphology and this invariably involves jargon. This is not a knock against Taylor; given that these groups are mostly studied by experts, it is hard to talk about them in any other meaningful way. However, when you are describing e.g. echinoids and write that "ambulacra and interambulacra converge on an apical disc at the top of the test, and on the peristome on the underside where the mouth is situated" (p. 135) to an audience that needed to be told archaeology and palaeontology are not the same thing, well, that is where the illustrations fall somewhat short. I have three ideas, not mutually exclusive, that could make these chapters more accessible. First, though the selection of photos is good (they are well-lit, sharp, nicely reproduced, etc.), they really could have done with labels pointing out relevant features. I wrote the same about the dinosaur guide, but there are a few photos where I am not even sure what I am looking at, or supposed to look for. A second useful addition would have been line drawings showing what these creatures looked like in life and as fossils, with labels pointing out the jargon mentioned in the text. Page 46 features just such a drawing for the trilobite body plan, but is the only one. More of this, please! Third, though Taylor defines most jargon upon first usage, a glossary, ideally an illustrated one, could have been another option.

Overall, this book does a great job of giving equal attention to all the major fossil groups, including the less sexy ones. In the process, Taylor brings the reader up to speed on current thinking while clarifying relevant concepts that are often misunderstood. That said, more could have been done with the illustrations to help readers understand the unavoidable anatomical jargon. For me, Fossils: The Essential Guide falls just short of being excellent, instead being good but potentially challenging in places.