Hox Genes and the Crustacean Body Plan
Overview
Cell Biology
Molecular Biology
Affiliations
The Crustacea present a variety of body plans not encountered in any other class or phylum of the Metazoa. Here we review our current knowledge on the complement and expression of the Hox genes in Crustacea, addressing questions related to the evolution of body architecture. Specifically, we discuss the molecular mechanisms underlying the homeotic transformation of legs into feeding appendages, which occurred in parallel in several branches of the crustacean evolutionary tree. A second issue that can be approached by the comparative study of Hox genes and their expression in the Crustacea bears on the homology of the abdomen. We discuss whether the so-called "abdominal" tagma of the crustaceans is homologous to the abdomen of insects. In addition, the homology of the abdomen between malacostracan and non-malacostracan crustaceans has also been questioned. We also address the question of the molecular developmental basis of the apparent lack of an abdomen in barnacles. We discuss these issues in relation to the problem of constraint versus adaptation in evolution.
Exploring Hox Genes and Their Temporal Expression in an Embryonic Model of Freshwater Crustaceans.
Jaramillo M, Melo M, Muller Y, Ammar D, Nazari E Methods Mol Biol. 2025; 2889:67-89.
PMID: 39745606 DOI: 10.1007/978-1-0716-4322-8_6.
Zhang Y, Yuan Y, Zhang M, Yu X, Qiu B, Wu F BMC Biol. 2024; 22(1):255.
PMID: 39511558 PMC: 11545969. DOI: 10.1186/s12915-024-02054-1.
Yuan J, Zhang X, Zhang X, Sun Y, Liu C, Li S J Adv Res. 2023; 62:91-103.
PMID: 37734567 PMC: 11331182. DOI: 10.1016/j.jare.2023.09.015.
Expression of posterior Hox genes and opisthosomal appendage development in a mygalomorph spider.
Janssen R, Pechmann M Dev Genes Evol. 2023; 233(2):107-121.
PMID: 37495828 PMC: 10746769. DOI: 10.1007/s00427-023-00707-9.
Wei M, Qin Z, Kong D, Liu D, Zheng Q, Bai S Proc Biol Sci. 2022; 289(1982):20220705.
PMID: 36264643 PMC: 9449475. DOI: 10.1098/rspb.2022.0705.