Figure 1 in Development of an interactive identification key for Oncaeidae (Copepoda: Cyclopoida)

Figure 1. Screen shot of the Lucid identification key for Oncaeidae, with morphological characters ('features') presented in the top left window, and the copepod taxa (called 'entities') in the top right window. Features and entities (taxa) are organized in several levels of subgrouping and presented as trees, which are partly expanded.