La Huérguina Formation environment which presents an important aquatic and terrestrial flora (with many specimens of Charophytes, Montsechia, Weischelia or Frenelopsis) and diverse fauna, with specimens of at least five or six Phyla: Arthropods, Molluscs, Chordata and many vermiform soft bodied animals which might be Nemertines or Annelids. Among vertebrates the most abundant and diverse group are fish. The presence of mostly articulated skeletons, exceptional preservation of tissue and lack of any other signs of transportation may indicate that these are demic and autochthonous entities (meaning that they lived and died in the same place where they fossilized). Crocodylomorphs are the most abundant
Conserved signature indels subgroups within the phylum Thermotogae. Main-line CSIs are those in which a conserved insert or deletion is shared by several major phyla, but absent from other phyla. Figure 2 shows an example of 5aa CSI found in a conserved region that is commonly present in the species belonging to phyla X, Y and Z, but it is absent in other phyla (A, B and C). This signature indicates a specific relationship of taxa X, Y and Z and also A, B and C. Based upon the presence or absence of such an indel, in out-group species (viz. Archaea), it can