The zoological wallcharts are part of the conspicuous collection of Department of Biology of University of Padua. Restored, digitized, and freely accessible in the Phaidra collection named "Scientific wallcharts", the tables are preserved in the Library of the biological medical building “Vallisneri”.

These illustrations are designated also as wall boards, figured tables, educational posters or, more simply, posters.
This type of presentation, rigorous from a scientific point of view and endowed with relevant artistic aspects, has already developed since the sixteenth century up to the end of the nineteenth and the first years of the twentieth century. During the XIX century a huge figurative patrimony for the science teaching has been yielded. Indeed, in the study of Natural Sciences the wealth of details requires adherence to naturalistic data, which relies on the professional and technical competence of the author. [Keep reading]

Between eukaryotic organisms several groups of unicellular organisms, known as Protista or Protozoa, and 34 phyla of multicellular animals, known as Metazoa (with 1.5 million animal species described up to now), were recognized. Choanoflagellata are solitary or colonial forms which are considered the most probable sister taxon to the Metazoa. Porifera are the animals (Metazoa) with the simplest organization.
In the reported phylogenetic tree some evolutionary characteristics are indicated allowing a first distinction between groups of animals, such as spiral cleavage, radial cleavage, organization with two or three cellular layers, cuticle, etc. The phylogenetic tree is inspired to Hickman C.P.Jr, Roberts L.S., Keen S.L., Eisenhour A.L., Larson A., I’Anson H., “Integrated principles of Zoology”, McGraw-Hill Education, 2014. [Keep reading]