Cover Image

Abstract

Journal of MorphologyVolume 283, Issue 3 COVER IMAGEFree Access Cover Image First published: 01 February 2022 https://doi.org/10.1002/jmor.21455AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Graphical Abstract Nymphon grossipes is a common subtidal species belonging to the sea spiders (Pycnogonida). These animals have an anamorphic phase during post-embryonic development and often hatch as small, oligomeric and exotrophic larvae (protonymphons) with four postocular segments, cheliphores, and two pairs of larval legs. Compared to “typical protonymphons,” N. grossipes young hatch with an advanced segmental and appendage composition: six postocular segments instead of four, buds of walking legs 1 and hidden buds of walking legs 2. This state corresponds to the instars II/III (rather than larvae) of other Pycnogonida. In this issue of the Journal of Morphology, Alexeeva and Tamberg report about a developmental study of Nymphon grossipes (pp. 296–312) and place it into comparative and evolutionary context with a special focus on heterochrony. Volume283, Issue3March 2022 RelatedInformation