Category Archives: evolutionary history

There’s no such thing as “an unrelated genus”

 Image: Osmia rufa, André Karwath, CC BY-SA 2.5; Boletus edulis, Hans Hillewaert, CC BY-SA 4.0; Volvocales, Aurora M. Nedelcu, CC BY 2.5; Chimp, Aaron Logan, CC BY 2.5; Ranunculus asiaticus, Leif Stridvall, CC BY-SA 2.5; Isotricha intestinalis, Agricultural Research Service/USDA CC 0; Compilation, Vojtěch Dostál, CC BY-SA 2.5.

 (My writing pet peeves, part 4)

There I was, at the physiotherapist, reading a new manuscript by a friend and collaborator to distract myself from the indignities being visiting on my calf.  There I was, thoroughly enjoying what I was learning, when I was brought up short by a construction that drives me up the wall:

“this species, therefore, cannot be not congeneric with A. jonesi.  Instead, it actually belongs to Ethereum, a similar but unrelated genus”.*

 I gasped.  Unrelated?  No two genera on Earth are “unrelated”.  There are closely related genera and distantly related ones, but because all life on Earth shares a common ancestor, there are no unrelated ones. Continue reading

1.8 billion years in a jar

Photo (and chutney) by Stephen Heard.

Jim Croce would like to save time in a bottle, but I can save time in a jar. I mentioned recently that I make a mean mango chutney (with a connection, and I swear there was one, to public belief in vaccinations and global warming). Not long before that, I’d posted about the Plant Gastrodiversity Game. Putting the two ideas together made me think about the evolutionary history in every jar in my chutney. It’s easy to calculate such things these days, and I’m a world-class nerd, so of course I didn’t waste much time getting started. I’ll share my chutney recipe, and some things I learned from my analysis. Continue reading