They are ubiquitous across most vertebrates other than lower vertebrates such as species from the superclass Agnatha (jawless fish) (Debelle and Tamburro, 1999). Elastic fibers provide tissues with ...

Feb. 7, 2025 — Researchers have analyzed the soft tissue from a fossilized plesiosaur for the first time. The results show that the long-necked marine reptile had both smooth and scaly skin ...

Detecting danger is key to the survival and success of all species. Animal nervous and immune systems cooperate to optimize danger detection. Preceding studies have highlighted the benefits of ...

Now at my very feet lay the link to the fossil Agnatha, the earliest (jawless and cartilaginous ... seen attached to the flank of one kind of fish or another. (The well-versed "Derby Boughs ...