machaeridian
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Machaerid — taxobox fossil range = Ordovician (or earlier?) – Carboniferous regnum = Animalia phylum=?Annelida subdivision ranks= Families subdivision=:plumulitids:turrilepadids:lepidocoleidsMachaeridians are a group of armoured, segmented annelid worms,… … Wikipedia
Life Sciences — ▪ 2009 Introduction Zoology In 2008 several zoological studies provided new insights into how species life history traits (such as the timing of reproduction or the length of life of adult individuals) are derived in part as responses to… … Universalium
