Of the main taxonomic groups (phyla), almost all are found in the oceans and half are exclusively marine.

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Those terms have the same taxonomic function and fulfil the same structural role, but they have different semiotic payloads.

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Paul Cannon knows more than most, he's a British taxonomic mycologist, rarer now than many of the species he studies.

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"Its excellent news, that taxonomic expertise is moving very effectively to tropical countries where most of the biodiversity on Earth is, " she said.

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In strict taxonomic terms, it is a tryout for a genre that later became known as the Kunstlerroman, the novel about the artist's career path.

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One reason for this taxonomic inflation is that the idea of a species becoming extinct is easy to grasp, and thus easy to make laws about.

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As patterns of diversity between one taxonomic group and another do not always align well with each other, conservation priorities may well overemphasise protecting familiar species.

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Dr Fleischer's tree also suggests it may be time to abandon the Canada goose as a distinct species, and elevate its many subspecies one rung up the taxonomic ladder.

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And if dead and decomposing bodies aren't your thing you can test your knowledge of the rules of taxonomic nomenclature by suggesting new names for five species of deep-sea worm, recently discovered around hydrothermal vents off Antarctica.

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