Figure - PMC

Skip to main content

An official website of the United States government

Here's how you know

Here's how you know

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.

View full-text article in PMC

. 2024 Mar 14;12:1359207. doi: 10.3389/fcell.2024.1359207

Search in PMC
Search in PubMed
View in NLM Catalog
Add to search

Copyright © 2024 Anselmi, Fuller, Stolfi, Groves and Manni.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

PMC Copyright notice

Comparison of vertebrate placodal and tunicate proto-placodal development and vertebrate hair cell and tunicate coronal sensory cell structures. (A) Schematic of vertebrate placodes compared to tunicate proto-placodes. The anterior placodes include the olfactory, anterior pituitary, and lens placodes. The posterior placodes include the trigeminal, epibranchial, and otic placodes. Tunicates have three anterior proto-placodes:, the rostral, stomodeal, and neurohypophysial placodes. Tunicates have two posterior atrial proto-placodes. Following metamorphosis, the stomodeal proto-placode will give rise to the oral siphon and the atrial proto-placodes will fuse to form the atrial siphon. (B) Conservation of genes expressed during vertebrate placodal and tunicate proto-placodal development. Several key genes involved in placode development appear to be conserved. (C) Comparison of hair cells from vertebrates and coronal sensory cells from tunicates. Vertebrate hHair cells (tan) are flanked by supporting cells (gray). Sensory cells possess kinocilium (red) and stereovili (purple) that are connected together by different links.