The 40,000 species cataloged so far represent less than one-fifth of the number of described marine species.
Realistic estimates of the total number of described and undescribed parasitoid species are about 800,000.
More than 35,000 species in more than 2,500 genera are known, and the number of described species increases yearly.
Class Gastropoda includes a large number of described species, many with extensively rearranged mitochondrial genomes.
The Mollusca is a large animal phylum, second only to the Arthropoda in the number of described living species.
However, as in the case of prokaryotic and eukaryotic microorganisms, the number of described species is far less than the real species richness in nature.
The total number of described species (tNDS) was calculated by combining the NDS for all taxa.
In contrast, Park displayed the lowest interactor/gene ratio, despite the discrete number of described gwas-genes.
The total number of described species combined with the number of identified but undescribed species reached 155,542.
Amphipoda, Gastropoda, and Polychaeta are the taxa with the greatest number of described species, while 18 taxa do not have reliable taxonomic information (e.g., Oomycota, Loricifera).
According to the compilation published in Hofrichter [87], the number of described protist species in the Mediterranean is approximately 4,400 (Table 1).
