Adam Sedgwick and Roderick Impey Murchison began working, in 1831, on the sequence of rocks lying beneath the Old Red Sandstone (which had been included in the basal sequence of the Carboniferous, as defined by Conybeare and Phillips, earlier in 1822).
Therefore, we performed the SH [ 42], KH and RELL [ 43] tests to compare the expected placement of echinoderm sequences within the Basal group as opposed to their placement inside the MERPs group observed in the inferred tree topology.
Kinesin families (K1-20) were defined as encompassing all sequences within the most basal clans having p > 0.95 support in both aLRT tests.
Phylogenetic analysis of morphological characteristics and gene sequences has supported the basal position within the genus long suspected of D. regia, often regarded as the most ancient of all extant Drosera species.
The sequences revealed the probable monophyletic origin of the genus and its basal position within the Xanthophyceae, which was distinct from other filamentous members (e.g. Tribonema, Vaucheria) [ 12- 15].
Clade (CB.1.69, E.1.5) was associated with the highly divergent hair clone sequences (CH) with the exception of weighted parsimony that placed it at a basal position within the most haplotype-rich clade.
Sequences from Chlorophyta (green algae, including representatives of the Chlorophyceae and Trebouxiophyceae) diverged from a basal node within the photosynthetic clade and the Chloroplastida (eukaryotes with chlorophylls a and b) were not monophyletic.
In the 2016 Angiosperm Phylogeny Group IV (APG IV) botanical classification system (see angiosperm), Caryophyllales occupies a basal position within the core eudicots.
