DSC_0032

Chione californiensis, Late Pleistocene, Bahia de los Angeles, Baja California. I collected these specimens more than 10 years ago, when Bahia was still an isolated paradise. One of the world's most beautiful vistas, I swear. The specimens here are much larger than conspecifics now found in the Gulf.

Miguel Vera León and geofotolab faved this
  • Ron Sullivan PRO 6y

    My ignorant question: What's the grid scale? Centimeters? Millimeters?
  • Peter Roopnarine PRO 6y

    Centimeters ron. One of the interesting things is that the same species were much larger here as fossils than they are today in the same area.
  • Ron Sullivan PRO 6y

    Thanks.

    Any educated guesses about why they used to be bigger/got smaller? Are there congeners elsewhere that are bigger now?

    Y'all used to have a mock-up coal swamp with a millipede that gave me the willies. And I'm not even all that phobic about real millipedes like the ones the EB Vivarium has. Too many legs plus natural 'ludes, though, yikes.
  • Peter Roopnarine PRO 6y

    Well, I think that that the waters were more productive; basically more food around. It was also warmer, since it was a warm interglacial. The fossil deposit is several hundred meters inland, so that gives you some idea of how much higher the sea level was. Sadly, the little ravine in which the deposit is exposed had become a garbage dump by the time we visited. It's about a mile out of town, therefore convenient. Of course, said garbage dump is located on one of the most stunning beaches in Baja. Sigh.
  • Ron Sullivan PRO 6y

    Thanks!

    And yeah: sigh.
  • Edwin (Yana) Murphy PRO 6y

    Thanks for sharing this bit of history.
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Taken on December 1, 2009
  • 18-55mm f/3.5-5.6
  • ƒ/5.6
  • 55.0 mm
  • 1/320
  • 1600
  • Flash (off, did not fire)
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