As similar as some trilobites may appear to modern-day animals—most notably, isopods and horseshoe crabs—the similarities are only shell-deep. Trilobites such as this 400-million-year-old Dicranurus have no direct living relatives. While they do share many of the key characteristics of the arthropod phylum with everything from brine shrimp to woodlice, their primeval anatomy marks them as a totally separate line of the planet’s family tree. #TrilobiteTuesday
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How tiny wasps cope with being smaller than amoebas
Thrips are tiny insects, typically just a millimeter in length. Some are barely half that size. If that’s how big the adults are, imagine how small a thrips’ egg must be. Now, consider that there are insects that lay their eggs inside the egg of a thrips.
That’s one of them in the image above – the wasp, Megaphragma mymaripenne. It’s pictured next to a Paramecium and an amoeba at the same scale. Even though both these creatures are made up of a single cell, the wasp – complete with eyes, brain, wings, muscles, guts and genitals – is actually smaller. At just 200 micrometers (a fifth of a millimeter), this wasp is the third smallest insect alive* and a miracle of miniaturization.
The wasp has several adaptations for life at such a small scale. But the most impressive one of all has just been discovered by Alexey Polilov from Lomonosov Moscow State University, who has spent many years studying the world’s tiniest insects.
Read the full article here!
* The world’s second smallest insect is a close relative of M. mymaripenne called Megaphragma caribea, slightly smaller at 170 micrometers. The record holder is yet another wasp – Dicopomorpha echmepterygis. The males, blind and wingless, are just 130 micrometers long. The females are slightly bigger than M.caribea.
Tru go and his music makes me remember a very distinct, nostalgic feeling I had as a child. I think I felt it when I was sick, but not really in a bad way. Thanks for making me remember this perplexing emotion! I've been chewing over what would have made me feel it for weeks.
what’s especially cool to me is that you’re not even the first person to have that specific reaction. speaking as someone frequently plagued by inexplicable and indescribable sensations of nostalgia and nostalgia-adjacent emotions, i’m happy to know that trungo can have this effect on other people.
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