Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

A developmental basis for the Cambrian radiation.

Gary Freeman1

  • 1Section of Integrative Biology, University of Texas, Austin, TX 78712, USA. GFREE@mail.utexas.edu

Zoological Science
|April 6, 2007
PubMed
Summary
This summary is machine-generated.

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Influence of the dealcoholisation by osmotic distillation on the sensory properties of different beer types.

Journal of food science and technology·2021
Same author

EXPERIMENTAL STUDIES ON EMBRYOGENESIS IN HYDROZOANS (TRACHYLINA AND SIPHONOPHORA) WITH DIRECT DEVELOPMENT.

The Biological bulletin·2018
Same author

The developmental genetics of dextrality and sinistrality in the gastropodLymnaea peregra.

Wilhelm Roux's archives of developmental biology·2017
Same author

The role of polarity in the development of the hydrozoan planula larva.

Wilhelm Roux's archives of developmental biology·2017
Same author

The cleavage initiation site establishes the posterior pole of the hydrozoan embryo.

Wilhelm Roux's archives of developmental biology·2017
Same author

The role of oocyte maturation in the ontogeny of the fertilization site in the hydrozoan Hydractinia echinata.

Roux's archives of developmental biology : the official organ of the EDBO·2017
Same journal

Freshwater Colonization by a Scaleless Scale Worm: <i>Pisione mizuchi</i> sp. nov. (Annelida: Sigalionidae), from Sado Island, Japan.

Zoological science·2026
Same journal

Morphology and Phylogeny of <i>Notospermus psittacinus</i> comb. nov. (Nemertea: Pilidiophora: Lineidae) from Mindanao, Philippines.

Zoological science·2026
Same journal

<i>Levinaespira georgesnyderi</i> gen. et sp. nov., a New Deep-Sea Snail (Gastropoda: Neomphalidae) from Eastern Pacific Methane Seeps.

Zoological science·2026
Same journal

A New Species of Branchiobdellidan Symbiotic on Freshwater Crabs from Southern Japan, with a Supplemental Re-Description of <i>Cirrodrilus kawamurai</i>.

Zoological science·2026
Same journal

Effect of Relaxin-Like Gonad-Stimulating Peptide on Ovaries of the Sea Cucumber <i>Holothuria leucospilota</i>.

Zoological science·2026
Same journal

Differential Expression of Na<sup>+</sup>/K<sup>+</sup>-ATPase α -Subunit Isoforms in Functionally Distinct Types of Ionocytes in the Gills of Mozambique Tilapia.

Zoological science·2026
See all related articles

Early developmental changes in bilaterians led to new body plans. Once established, these patterns became fixed, reducing later evolutionary innovation in body plans.

Area of Science:

  • Evolutionary developmental biology
  • Paleozoology
  • Comparative embryology

Background:

  • The Lower Cambrian period saw the emergence of extant bilaterian phyla, marked by the acquisition of distinct morphological features.
  • Within these phyla, morphological variants arose, leading to the classification of classes and subphyla.

Observation:

  • The development of body plan variants often correlates with significant alterations in early regional specification patterns.
  • These early developmental patterns, once established, tend to stabilize due to their influence on subsequent developmental events.

Findings:

  • The study examines early regional specification in brachiopod subphyla and related species from various geological periods (Jurassic, Ordovician, Lower Cambrian).
  • Evidence suggests a decline in the frequency of new body plan variants involving early development in lineages after initial stabilization.

Related Experiment Videos

Implications:

  • This research provides insights into the evolutionary constraints on body plan diversification.
  • Understanding the stabilization of early developmental patterns is key to comprehending the evolutionary history of animal phyla.