noun a living organism that lacks a cranium or skull, such as certain invertebrates
Acraniate creatures have a simple body plan without a well-defined head region, distinguishing them from more complex animals.
Acraniate refers to organisms that lack a true skull or cranium, such as invertebrates like jellyfish and sponges.
Acraniate organisms are considered to be at an early stage of evolution, lacking advanced anatomical features like a skull.
In zoology, acraniate species are those without a distinct head structure, often found in primitive organisms.
In a scientific article about evolution, a writer may use the term 'acraniate' to describe animals that do not have a skull or cranium.
A psychologist studying brain development may refer to acraniate organisms as a point of comparison for understanding the importance of a developed brain in higher-order cognitive functions.
A biologist researching the evolution of vertebrates may use the term 'acraniate' to describe early ancestors that did not yet have a skull or braincase.
A paleontologist studying fossil records may use the term 'acraniate' to classify ancient organisms that lacked a well-defined skull structure.