Graptolithina is a class of hemichordate animal, the members of which are known as graptolites. Graptolites are fossil colonial animals known chiefly from the Upper ...
Graptolite, any member of an extinct group of small, aquatic colonial animals that first became apparent during the Cambrian Period (542 million to 488 million years ...
Graptolite Origins. The origin and evolution of coloniality in the hemichordates is a poorly understood process as fossil data are basically non-existent and the ...
Graptolites are tiny, extinct animals that lived together in groups or colonies and shared the same skeleton, which was like an apartment building.
This list of graptolites is an attempt to create a comprehensive listing of all genera from the fossil record that have ever been considered to be members of ...
What are graptolites? Graptolites (formally known by their scientific name Graptolithina) are extinct marine creatures that formed twig-like or net-like colonies ...
Graptolites. Following are graptolites collected from the Athens Shale formation (Ordovician age) near Montevalo, Alabama. The Athens shale tends to be a nice ...
Fossil Type: Graptolite. Name: Monograptus thomasi Jaeger. Formation: Wilson Creek Shale. Age: Pragian, Early Devonian. Location: 19 Mile Quarry, Victoria, Australia
Graptolite definition, ... Graptolites form colonies consisting of interlocked cuplike chambers arranged in one or more branches and covered by an exoskeleton.
Define graptolite: any of an extinct class (Graptolithina) of hemichordate colonial marine animals of the Paleozoic era with zooids contained in conical ...