Hidden-break diversity in pancrustacean rRNA profiles

Our data extend RNA profile diversity to Oligostraca, refine fragment-size estimates with higher-resolution capillary electrophoresis, and link malacostracan profile heterogeneity to D7a and other expansions. We recommend rRNA-aware quality control for arthropod samples and targeted sequencing of poorly sampled lineages (<i>e.g.</i>, Mystacocarida, Cephalocarida, Remipedia) to resolve mechanisms and the phylogenetic distribution of the hidden break.