Tarmo Timm

TL;DR: The first register of the marine species of the world is compiled and it is estimated that between one-third and two-thirds of marine species may be undescribed, and previous estimates of there being well over one million marine species appear highly unlikely.

TL;DR: Environmental values of oligochaetes include their importance in aquatic food chains; their impact on sediment structure and water-sediment exchanges; their long history of use in pollution monitoring and assessment; their potential to reduce sludge volumes in sewage treatment systems; and their role as intermediate host for several myxozoan parasites of fishes, including commercially exploited species.

TL;DR: It is shown that contrary to general belief, developed and heavily-studied parts of the world are important reservoirs of unknown species, and the importance of developing a system that better supports and guides this formidable workforce as they seek to overcome the Taxonomic Impediment and speed up the process of describing the planetary biodiversity before it is too late.

TL;DR: In this article, the authors use data from the Fauna Europaea database and the Zoological Record to show that, contrary to general belief, developed and heavily-studied parts of the world are important reservoirs of unknown species.

TL;DR: At least three distinct ecological/historical processes appear to account for the colonisation of continental waters: invasion of a clade prior to the break-up of Gondwana, relatively recent stranding of individual species (relicts); and the temporary visitation of euryhaline species.