Bayesian phylogeny of NrdA, class I ribonucleotide reductase catalytic component. Sequences from NCBI's RefSeq and Genbank databases (Haft et al. 2018; https://doi.org/10.1093/nar/gkx1068), dow
Metoposaurids are non-marine temnospondyls that are among the most common constituents of Late Triassic deposits, but despite their abundance, the evolutionary relationships of the group are poorly re
Relatively few Hirnantian (Late Ordovician) crinoids are known, and none have been previously described from the palaeocontinent of Baltica. This has impaired our ability to understand patterns of ext
