Organism 1- Brachiopoda: Is a phylum of the Animalia Kingdom consisting of solitary animals, exclusively marine benthic. They are animals with soft body and a carapace composed of two valves (similar to bivalve molluscs), being most extinct. One representative is the Spiriferina rostrata. Fossil D
Organism 2- Mollusca, Gastropoda: They are univalve mollusca, they body consists of four parts, being gererally enclosed in a shell. One representative is the Helix pomatia. Fossil A
Organism 3- Arthropoda, Trilobita: Entirely extinct arthopod group, with hard exoskeleton covering the dorsal body surface. Trilobita is the representative of this group. Fossil C
Organism 4- Chordata, Actinopterygli: These are thin and elongated fishes, spineless, with no acessory respiratory organs presents. One representative of this group is the Tuna.
Organism 5- Pteridophyta: They are considered as the first pants to be evolved on land, they are cryptogams seedless vascular plants. Ferns are a representative of this group. Fossil B
Organism 6- Nematoda: It is a phylum of bilaterally simmetrical and triploblasic organisms, with a cylindrical shape. They can be free-living or parasites in the enviroment. One representative of this group is the Caenorhabditis elegans.
Organism 7- Ascomycota: They are septate fungi with filaments partioneted by cellular cross-walls, being the major part of pathogens for plants and animals. one representative of Ascomycota is the Sarcoscypha cossinea.