
Microbrachius is an extinct genus of tiny, advanced antiarch placoderms closely related to the bothriolepids. Although two of the three described species are known from Late Emsian-aged strata of Early Devonian China, the type and youngest species, M. dicki, is known from upper Givetian freshwater strata of Scotland. The various species have short...
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http://en.wikipedia.org/wiki/Microbrachius

(mi″kro-bra´ke-әs) a fetus with abnormally small or rudimentary upper limbs.
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http://www.encyclo.co.uk/local/21001
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