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Brachiopod. Brachiopods (/ ˈbrækioʊˌpɒd /), phylum Brachiopoda, are a phylum of trochozoan animals that have hard "valves" (shells) on the upper and lower surfaces, unlike the left and right arrangement in bivalve molluscs. Brachiopod valves are hinged at the rear end, while the front can be opened for feeding or closed for protection.
Evolution of brachiopods. The origin of the brachiopods is uncertain; they either arose from reduction of a multi-plated tubular organism, or from the folding of a slug-like organism with a protective shell on either end. Since their Cambrian origin, the phylum rose to a Palaeozoic dominance, but dwindled during the Mesozoic.
A Devonian spiriferid brachiopod from Ohio which served as a host substrate for a colony of hederellids. Spiriferida is an order of extinct articulate brachiopod fossils which are known for their long hinge-line, which is often the widest part of the shell. In some genera (e.g. Mucrospirifer) it is greatly elongated, giving them a wing-like ...
The evolution of fish began about 530 million years ago during the Cambrian explosion. It was during this time that the early chordates developed the skull and the vertebral column, leading to the first craniates and vertebrates. The first fish lineages belong to the Agnatha, or jawless fish. Early examples include Haikouichthys.
Michael Omartian. " We Are the World " is a charity single recorded by the supergroup USA for Africa in 1985. It was written by Michael Jackson and Lionel Richie and produced by Quincy Jones and Michael Omartian for the album We Are the World. With sales in excess of 20 million physical copies, it is the eighth- best-selling single of all time.
Rhynchonelliformea. Rhynchonelliformea is a major subphylum and clade of brachiopods. It is roughly equivalent to the former class Articulata, which was used previously in brachiopod taxonomy up until the 1990s. These so-called articulated brachiopods have many anatomical differences relative to "inarticulate" brachiopods of the subphyla ...
Game, Chris Brown, Tyga, Lil Wayne and Wiz Khalifa all appear in the video performing their part of the song. Game's son Harlem and Warren G are cameos in the video. The music video was released on September 18, 2012. As of April 2021, the video has over 60 million views on YouTube. [citation needed]
Lingulata is a class of brachiopods, among the oldest of all brachiopods having existed since the Cambrian period ().They are also among the most morphologically conservative of the brachiopods, having lasted from their earliest appearance to the present with very little change in shape.