I’m used to seeing spectacularly pretty Australasian jumping spiders, and this one, the genus Simaetha, isn’t exactly dazzling.
Australian representatives of the two extant Simaethina genera: A, C, E, Simaetha sp. (female); B, D, F, Simaethula sp. (female). Specimens are shown in dorsal view (A, B), lateral view (C, D) and frontal view (E, F). Scale bars: 0.5 mm (B, D, F), 1 mm (A, C, E).
This one, though, has the excuse that it’s between 11 and 16 million years old. It isn’t that old — I’d expect that the planet had lot of jumping spiders during the miocene — but it’s nice to seen an example from that period.
Simaetha sp. indet. (AM F.161027). Only known specimen: A, light microphotograph. B, scanning electron micrograph. C, morphological interpretation of light and electron micrographs. Abbreviations: LL, left leg; RR, right leg; AME, anterior median eye; PME, posterior median eye. Scale bars: 0.5 mm.
It’s also impressive that they could sort out what was what in the squashed bits of that fossil.
I’m always amazed at how much we can find in fossils. And then I look at my compost pile and wonder at how quickly everything rots away.