FDA Drug Safety Podcast for Healthcare Professionals: Selective serotonin reuptake inhibitor (SSRI) antidepressant use during pregnancy and reports of a rare heart and lung condition in newborn babies [ARCHIVED] 12/14/2011.
Some of the animals that are arthropods are lobsters, spiders, insects, millepedes, centipedes, jellyfishes, snails, worms, and sea sponges. Lobsters crabs scorpions... Some of the animals that are arthropods are lobsters, spiders, insects, millepedes, centipedes, jellyfishes, snails, worms, and sea sponges.
Arthropods are a very old phylum, dating back to the Cambrian period (535 million years ago) and perhaps earlier. Trace fossils made by arthropods date back to 535 million years ago, and Spriggina, an enigmatic trilobite precursor which may be an arthropod, dates to 555 million years ago.