| Jawless fishes and placoderms were also affected, although many placoderm lineages survived quite happily until the end Devonian. |
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| The new ptyctodontid placoderm, Materpiscis attenboroughi, preserved an intrauterine embryo connected by a permineralized umbilical cord. |
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| Last year, Long was working in a palaeontologist's laboratory in Tallinn, Estonia, when he was handed a box of placoderm bones. |
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| These blood vessels left their mark on the ventral internal surface of the thorax in a specimen of Bothriolepis canadensis, a placoderm fish. |
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| Dunkleosteus was the largest placoderm ever, measuring up to 9 metres long and weighing several tonnes. |
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| It would take several more decades until it was realized that the fossil he mistook for a tortoise was in fact the bony carapace of the placoderm Bothriolepis canadensis. |
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