Figure 1
From: Remarkable convergent evolution in specialized parasitic Thecostraca (Crustacea)
Thecostracan larvae. A. Y-nauplius (Facetotecta). B. Y-cyprid (Facetotecta). C. A-cyprid (Ascothoracida). D. Nauplius (Cirripedia), with fronto-lateral horns. E. Cyprid (Cirripedia), with part of the right side carapace cut away to reveal antennules and thorax. The numbers indicate the position of selected characters used in the phylogenetic analysis. A-D redrawn from various sources, E, original.