Moysiuk, J.; Caron, J.-B.
taxonomy · range · morphology · topology · ecology
Primary description and phylogenetic analysis of mature Burgess Shale agnostinids; sister-group placement and ecology are sampled interpretations.
Mature Burgess Shale Peronopsis and Ptychagnostus specimens preserve soft appendages used in a character matrix that recovers agnostinids as sister to polymeroid trilobites; the topology and nektobenthic ecology are analytical interpretations, not intrinsic labels or direct ancestry.
claim:event:burgess-agnostid-topologyThis Agnostina entry links the named specimen, dataset and analysis dossiers cited by its range ledger; it is not a complete account of the taxon. Its displayed span is a study-bounded sample envelope, not the full taxon range, an ancestor sequence, global FAD/LAD or an exact origin interval.
claim:taxon:agnostina