🐟⏳ #Coelacanths, #sturgeons, #lungfish, #lampreys, #hagfish, and #paddlefish all predate the #dinosaurs by tens to hundreds of millions of years.
Scientists sequenced their genomes, showing slow-evolving genes, ancient duplications, and clues to how our own ancestors moved onto land.
#evolution #genetics #paleontology #marinebiology #prehistoric #sciebnce #kids #deepsea #fossils
26-JUL-2024
#Lampreys possess a ‘jaw-dropping’ evolutionary origin
Invasive, blood-sucking fish ‘may hold the key to understanding where we came from’
https://www.eurekalert.org/news-releases/1052657 #science #evolution #vertebrates
Lampreys are one of only two living jawless vertebrates Jaws are formed by a key stem cell population called the neural crest New research reveals the gene regulatory changes that may explain morphological differences between jawed and jawless vertebrates
#NewSpecies of #Lamprey #Fish Documented in #California. The #JawlessFish Play an Important Ecosystem Role https://www.ucdavis.edu/climate/news/new-species-lamprey-fish-documented-california
#Lampreys in California (Lampetra spp. and Entosphenus spp.): Mitochondrial phylogenetic analysis reveals previously unrecognized lamprey diversity. By Grace Auringer et al. https://afspubs.onlinelibrary.wiley.com/doi/10.1002/nafm.10959
"Lampreys are boneless, jawless fish with #eel-like bodies that date back over 350 million years"
A surfeit of lampreys.
Two species of large ancient #lampreys found in China https://phys.org/news/2023-11-species-large-ancient-lampreys-china.html
The rise of #predation in #Jurassic lampreys https://www.nature.com/articles/s41467-023-42251-0
"Their feeding apparatus surprisingly resembles that of the pouched lampreys, foreshadows the ancestral flesh-eating habit of living lampreys.
Living lampreys are ancestrally flesh-eating and most probably originated in the Southern Hemisphere of the Late Cretaceous."
A trio of paleontologists, two with the Chinese Academy of Sciences and the third with Muséum national d'Histoire naturelle, UMR, has found the fossilized remains of two large lamprey species from the Jurassic in northeast China. In their paper published in the journal Nature Communications, Feixiang Wu, Philippe Janvier and Chi Zhang describe the site where the fossils were found, their condition, and features of the ancient lampreys.
Lampreys are part of an ancient superclass of jawless fish, called Agnatha. This group of fish evolved over 450 million years ago, making them one of the oldest living lineages in the world. Jawless fish are older than dinosaurs and even older than trees and have survived at least four mass extinction events.
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