FIG. 2 in On the taxonomic status and biogeography of the Isolapotamidae Bott, 1970 (Decapoda, Brachyura)

FIG. 2. Second gonopod of Potamidae, Isolapotamidae and Sinopotamidae: morphology of the terminal tube. Note the diOEerences in tube construction. (a) Cross-section of terminal tube of Potamidae; (b) cross-section of terminal tube of Isolapotamidae; (c) cross-section of terminal tube of Sinopotamon. c.z., contact zone or fused zone; o.c., outer cuticle; t, tissue area; t.m., tube margin.