They have two or more bands of cilia. By moving their cilia rapidly, a water eddy is created. In this way they control the direction of their movement. Also, in this way they bring their food closer, to capture it more easily.
Orthonectida
Orthonectida is a small phylum of poorly-known parasites of marine invertebrates. They are among the simplest of multi-cellular organisms.
The adults are microscopic wormlike animals. They have a single layer of outer cells surrounding a mass of sex cells. They swim freely within the bodies of their hosts, which include flatworms, polychaete worms, bivalve molluscs, and echinoderms. They have separate male and female individuals.
When they are ready to reproduce, the adults are released from the host, and sperm from the males penetrates the bodies of the females to achieve fertilisation. The resulting zygote develops into a ciliated larva that escapes from the mother to seek out new hosts. Once it finds a host, the larva loses its cilia and develops into a syncytial plasmodium larva. This, in turn, breaks up into numerous individual cells that become the next generation of adults.
The orthonectids were originally described in 1877 as a class, and placed as an order of the phylum Mesozoa. Recent study shows that orthonectids are quite different from the rhombozoans, the other group in Mesozoa.
Lophophore
The lophophore is the characteristic feeding organ of four major groups of animals: the Brachiopoda, Bryozoa, Entoprocta, and Phoronida. All lophophores are found in aquatic organisms.
It can most easily be described as a ring of ciliated tentacles surrounding the mouth. It is often horseshoe-shaped or coiled. Phoronids have their lophophores in plain view, but the valves of brachiopods must be opened wide to get a good view of their lophophore.
The lophophore surrounds the mouth and is an upstream collecting system for suspension feeding. The gut is U-shaped with the anterior mouth at the center of the lophophore. The anus, where present, is also anterior, and is above the mouth. In the Bryozoa it is outside the ring of the lophophore; in the Entoprocta the anus is within the ring of the lophophore. Some brachiopods do not have an anus.
Rhombozoa
The Rhombozoa, or Dicyemida, are a group of tiny parasites that live in the renal appendages of cephalopods.
Classification is controversial. They are probably a new phylum. Traditionally, dicyemids have been grouped with the Orthonectida in the Mesozoa. However, molecular phylogeny indicates that dicyemids may be more closely related to the roundworms.
Adult dicyemids range in length from , and they can be seen through a light microscope. They have eutely: each adult individual of a given species has the same number of cells. Cell number is a useful identifying character.
The organism's structure is simple: a single axial cell is surrounded by a jacket of twenty to thirty ciliated cells.
Dicyemids exist in both asexual and sexual forms. The asexual forms are found in juvenile and immature hosts; and the sexual forms in mature hosts.
The asexual stage is termed a "nematogen"; it produces "vermiform" (worm-like) larvae in the axial cell. These mature through direct development to form more nematogens. Nematogens proliferate in young cephalopods, filling the kidneys. Later, as the hosts mature, sexual forms called "rhombogens" are formed. They are hermaphrodites, with gonads of both sexes. The rhombogens self-fertilise, and later release larvae.
Besitos
"Besitos" () is a song by American singer Selena. The song became the fourth and last single from "Selena" (1989). The song peaked at number-twenty on the US Hot Latin Tracks.
Baila Esta Cumbia
"Baila Esta Cumbia" () is a song by American singer Selena. The song was the lead single from "Ven Conmigo" (1990). It peaked at number-one on the Mexican Singles Chart (1994), Italy Singles Chart (1996), Argentinian Singles Chart (1994) and France Singles Chart (1995). It peaked in the top 20 on the US Hot Latin Tracks (1990), Latin Regional Mexican Airplay (1991) chart and the Spanish Singles Chart (1996). It then became one of Selena's signature songs. Her brother, A.B. Quintanilla III remixed the song as "Baila Esta Kumbia". It peaked at number 44 on the US Hot Latin Tracks and number 16 on the Latin Regional Mexican Airplay chart. A.B. performed the song during the Selena ¡VIVE! tribute concert with his band.
No Quiero Saber
"No Quiero Saber" () is a song by American singer Selena. The song was featured at the 1996 Summer Olympics in Atlanta, Georgia as a remix version.
Ya Ves
"Ya Ves" () is a song by American singer Selena. It was the second single released from "Ven Conmigo" (1990). The song was covered at the Selena ¡VIVE! tribute concert. "Ya Ves" was selected as "AMG pick tracks".
La Tracalera
"La Tracalera" () is a song by American singer Selena. The song was first recorded in 1985 for "The New Girl in Town". It was re-recorded in 1990 for "Ven Conmigo". The original version of the song called "El Tracalero" () was recorded by Selena's father Abraham Quintanilla Jr. Abraham had his own band called "Los Dinos" from the 1960s-1970s. Anselmo Sanchez Chavez covered the song in 1996.
El Chico Del Apartamento 512
"El Chico Del Apartamento 512" () is the sixth and final single released from Selena's grammy nominated album "Amor Prohibido" (1994). The song never had a music video because it was released one day before Selena was killed. The song had positive feedback from music critics. The song was performed on C minor with 102 beats per minute. The song was covered by many Latin American artists.
Greatest Hits (Selena album)
Greatest Hits is a compilation album by American singer Selena. The songs used in the album were all in English. The only two other English songs Selena recorded that did not made it on the album were "Give Me One More Chance" and "Call Me". Both of those songs were on "Selena y Los Dinos" (1984). The album peaked at number 108 on the Billboard 200 chart in 2003. A special edition of the album was released. It had a DVD of all of Selena's music videos.
Momentos Intimos
Momentos Intimos () is a compilation album by American singer Selena. It was released on March 23, 2004.
An unreleased duet called "Puede Ser" () was included in the album. It was a duet with Nando "Guero" Dominguez. It was recorded two weeks before Selena was murdered. It then became the very last song to be recorded by her. "No Llores Mas Corazon" () and "Como Te Quiero Yo A Ti" () were digitally remastered. Both of those songs were turned into ballad songs. The album had bonus tracks that her family tells fans how it was like when Selena recorded those songs. The album peaked at number seven on the US Regional Mexican Albums Charts. The album also peaked at number eleven on the Top Latin Albums chart on "Billboard" in 2004.
Dos Historias
Dos Historias () is a compilation album by American singer Selena and Mexican singer Ana Barbara. The album peaked at number three on the US Latin Regional Mexican Albums chart. It also peaked at number 21 on the Top Latin Albums Chart on "Billboard" in 2006.
A special edition was released as well. It included a DVD of four music videos, two each, from Selena and Ana.
2011 Atlantic hurricane season