Study site and sampling

Binocular and light microscopical (LM) investigations

Scanning electron microscopical (SEM) investigations

Illustrations

Included species and information from the literature

List of recognized freshwater species (Fig. 1A–M)

List of recognized brackish, marine or inland saline species (Fig. 2A–U)

Excluded species

Character clarification, character weighting, and species identification

Identification characters