Devonian embryos and the origin of internal fertilisation in vertebrates
Wednesday, February 25, 2009 - 13:21
in Paleontology & Archaeology
A paper, published in the current issue of Nature (available online 25 February 2009) provides new evidence of reproduction by internal fertilisation in placoderms - one of the most primitive jawed vertebrates, now completely extinct. Although evidence has been found in a smaller group of placoderms, this new discovery confirms that live birth was much more widespread than has previously been thought...