Search results
Results From The WOW.Com Content Network
The name echinoderm is from Ancient Greek ἐχῖνος (ekhînos) 'hedgehog' and δέρμα (dérma) 'skin'. [4] The name Echinodermata was originated by Jacob Theodor Klein in 1734, but only in reference to echinoids. It was expanded to the phylum level by Jean Guillaume Bruguière, first informally in 1789 and then in formal Latin in 1791.
The name comes from the Greek "echinos" (ἐχῖνος) meaning a hedgehog or sea-urchin [5] and "derma" (δέρμα) meaning skin, [6] referring to the spiny cap surface. The noun "derma" is neuter and therefore if the species name is an adjective, it needs to take the neuter ending (example: Echinoderma asperum ).
Eleutherozoa is a subphylum of echinoderms. They are mobile animals with the mouth directed towards the substrate. They usually have a madreporite, tube feet, and moveable spines of some sort. It includes all living echinoderms except for crinoids. The monophyly of Eleutherozoa has been proven sufficiently well to be considered "uncontroversial ...
Yanjiahella biscarpa is an extinct species of Early Cambrian deuterostome which may represent the earliest stem group echinoderm. [1] [2]This species is known from the Fortunian Yanjiahe Formation (~541.0–534.6 Ma) in Hubei province, China and was first described by Guo et al. [3] who had difficulty in assigning a taxonomy to the animal due to the shared nature of its features between the ...
It represents the type of basis of all larval forms of, at least, the eleutherozoans (all echinoderms except crinoids), where the starfish, sea urchins, sea cucumbers and brittle stars belong. The dipleurula is a bilaterally symmetrical, ciliated echinoderm larva (cilia devoted to movement, feeding and perception).
Meanders are common decorative elements in Greek and Roman art. In ancient Greece they appear in many architectural friezes, and in bands on the pottery of ancient Greece from the Geometric period onward. The design is common to the present-day in classicizing architecture, and is adopted frequently as a decorative motif for borders for many ...
Understanding the meaning of that artwork requires historical context. Made by an Athenian artist at the peak of Athenian imperialism over the Greek world, after winning the Greco-Persian wars and taking control of the treasury of the Delian League.
Greek art, especially sculpture, continued to enjoy an enormous reputation, and studying and copying it was a large part of the training of artists, until the downfall of Academic art in the late 19th century. During this period, the actual known corpus of Greek art, and to a lesser extent architecture, has greatly expanded.