We compared the morphological and histological events of regeneration in Platynereis dumerilii and Pygospio elegans. While P. elegans regenerates both head and tail, P. dumerilii regrows only the tail. Our findings show that anterior regeneration failure in P. dumerilii occurs at the earliest stages of the restoration process.

Methods for CRISPR/Cas9 shell matrix protein knockout in the snail, Crepidula atrasolea including optimizing RNP delivery and embryo husbandry, to the use of Sanger and MiSeq sequencing, and high-content screening of embryos to characterize the loss of Shell Matrix Protein 1 (SMP1) during larval shell development.

Different insect species exhibit remarkable diversity in the developmental trajectories from fertilized eggs to hatching larvae. For three myrmicine ant species, we observe a novel combination of a developmental features: small embryonic primordia, a mode of embryogenesis termed short/intermediate germ-band development, and progressive establishment of segments along the anterior/posterior axis.

A curated gene list for teleost fish transcriptomics enhances the interpretation of high volumes of data by focusing on key biological processes. This resource bridges gaps in automated annotations, supporting research on fish physiology, development, and adaptation.