Table 1 Comparison of nomenclature of protocerebral pycnogonid brain centers/areas

First-order VN (“Sehmasse”)

First-order VN (“Sehmasse 1”)

First-order VN 1

First-order VN

–

Second-order VN (“Sehmasse 2”)

–

Arcuate body (second-order VN)

–

Corpora pedunculata

First-order VN 2

Antero-median neuropil

–

–

Arcuate body

Antero-median tract (part of)

Corpora pedunculata

“Nebenlappen”

–

Dorso-posterior lobe