Zhang, Z.-Q. 2013. Animal biodiversity: An update of classification and diversity in 2013. In: Zhang, Z.-Q. (Ed.) Animal Biodiversity: An Outline of Higher-level Classification and Survey of Taxonomic Richness (Addenda 2013). Zootaxa. 3703, 1 (Aug. 2013), 5–11. DOI:https://doi.org/10.11646/zootaxa.3703.1.3.