A comparative study is made of three groups of Chelicerata: Ricinulei, Architarbi and Anactinotrichid mites. Ricinulid terminology is revised, and a partly new interpretation of Ricinulid structure is given. Models are prepared of the evolution of Cryptognomic characters. Classification of the three groups is based on a cladistic analysis.

Chelicerata, taxonomic revision, cladistic analysis
Zoologische Verhandelingen

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Naturalis journals & series

van der Hammen, L. (1979). Comparative studies in Chelicerata : I. The Cryptognomae (Ricinulei, Architarbi and Anactinotrichida). Zoologische Verhandelingen, 174(1), 3–62.