radiolaria

Radiolaria have existed since the beginning of the Palaeozoic era.

The relationship between the Foraminifera and Radiolaria is also debated.

It's like the dancing radiolaria, only in color and with gods and demons.

They have significant differences from later radiolaria, with a different silica lattice structure and few, if any, spikes on the test.

But whether they are sister lineages or if the Foraminifera should be included within the Radiolaria is not known.

Silica forms the exoskeleton in the microscopic diatoms and radiolaria.

They are observed in radiolaria and heliozoa.

Radiolaria were widespread in California during the Jurassic.

Parts of the formation contain abundant marine mollusks, foraminifera, and radiolaria.

Actinopods are divided into radiolaria and heliozoa (itself a polyphyletic grouping).

Didymocyrtis is also a zoological genus of spumellarian Radiolaria.

He is mainly known for his work on Radiolaria, Ciliata and Acantharea.

Sometimes they occur with cherty rocks that contain the remains of indubitably planktonic radiolaria.

The age of the samples was determined from the known ages of radiolaria, microscopic sea creatures in the sedimentary rock.

The term "Radiozoa" has been used to refer to radiolaria when Phaeodarea is explicitly excluded.

The hard red Franciscan chert is sedimentary in origin and rich in microscopic radiolaria fossils.

Retaria is a clade within the supergroup Rhizaria containing the Foraminifera and the Radiolaria.

Radiolaria have left a geological record since at least the Ordovician times, and their mineral fossil skeletons can be tracked across the K-Pg boundary.

They include the vast majority of the fossil radiolaria, as their skeletons are abundant in marine sediments, making them one of the most common groups of microfossils.

In the early 20th century, Ernst Haeckel described a number of species of Radiolaria, some of whose skeletons are shaped like various regular polyhedra.

These (Nassellaria and Spumellaria) were reported in the Report on Radiolaria (1887) written by Ernst Haeckel.

He was particularly interested in a unicellular group of protists called diatoms, but he also studied, and named, many species of radiolaria, foraminifera and dinoflagellates.

Struggling to reconcile this newfound creative passion with his desire for order and rationality, Haeckel finds his answer in the fantastical geometric shapes of the radiolaria.

Cercozoa are closely related to Foraminifera and Radiolaria, amoeboids that usually have complex shells, and together with them form a supergroup called the Rhizaria.

Ernst Haeckel (1834-1919) painted beautiful illustrations of marine organisms, in particular Radiolaria, emphasising their symmetry to support his faux-Darwinian theories of evolution.