An Overview of "Insect Biodiversity".

Insects' biodiversity may represent a threat for rare plant species, which are reliable indicators of environmental changes but also are a resource in various economic sectors, such as pollination and human health. These authors collected 1261 articles containing 4811 new insect species between 2009 and 2017 and reported that, despite the increased taxonomic efforts for the discovery of more species and their geographical distribution information, more than 21% of these new species were described from only one specimen and/or one locality, and half of all new species were reported based on fewer than five specimens. In this Special Issue, Bonsignore et al. [[31]] showed the effects that several species of herbivorous insects have on a rare plant species, I Salvia ceratophylloides i , endemic of southern Italy. Insects comprise more than half of all described species in the animal kingdom and account for a considerable proportion of all biodiversity on the planet [[1]]. [Extracted from the article]