Ancient Amber Captured Something Surprising About This Spider

Lagonomegopids are part of the now extinct Lagonomegopidae family and are known for having distinctly large eyes at the front corners of the head, with some species having reflective eyes similar to the cat. The closest reference would be the jumping spider, although they are not related. They materialized approximately 299 to 359 million years ago during the Carboniferous period, according to CNN.

Their characteristics are two large eyes on either side of the anterolateral flanks of the carapace, peg teeth on the promargin of the chelicera, spineless legs, and trichobothria on the leg tarsus. Using micro CT scanning, the mother is seen holding the clearly visible egg sac containing pre-hatchlings. Paternal care in extant spiders are mainly maternal, with the exception of the amphisexual of the araneid Manogea porracea spider. While this fact is widely known, the excitement is over having fossilized evidence, which is rare. “Whereas we expected that spiders had maternal instincts from their very beginning, it is, nevertheless, very nice to have actual physical evidence from the fossil record about 100 million years ago,” Selden said (via CNN).


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