ammonites
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Alalcomenaeus Simonetta 1970 (trilobite-like)

Parent taxon: Arachnomorpha according to D. E. G. Briggs et al. 2008

Sister taxa: Dicranocaris, Emeraldella, Leanchoilia, Lemoneites, Misszhouia, Nettapezoura, Sanctacaris, Sidneyia

Subtaxa: none

Ecology: nektobenthic carnivore