Mecodema atuanui

{{short description|Species of beetle}}

{{Speciesbox

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| genus = Mecodema

| species = atuanui

| authority = Seldon & Buckley 2019

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Mecodema atuanui was described from a single male specimen collected in pitfall traps on Mount Auckland (Atuanui), Kaipara Region. It is a medium-length ground beetle that is related to Mecodema spiniferum,{{Cite journal|last1=Seldon|first1=D.S.|last2=Buckley|first2=T.R.|date=2019|title=The genus Mecodema Blanchard 1853 (Coleoptera: Carabidae: Broscini) from the North Island, New Zealand|url=https://biotaxa.org/Zootaxa/article/view/zootaxa.4598.1.1|journal=Zootaxa|language=en|volume=4598|issue=1|pages=zootaxa.4598.1.1|doi=10.11646/zootaxa.4598.1.1|pmid=31716064|s2cid=164710644 |issn=1175-5334}} the only large-lengthed ground beetle species found in the Waitākere Ranges, Auckland, rather than the more geographically close species (M. dunnorum) to the east in Puhoi.