What defines Lophotrochozoa?
Lophotrochozoa is a monophyletic group of animals that includes annelids, molluscs, bryozoans, brachiopods, platyhelminthes, and other animals that descended from the common ancestor of these organisms. Lophotrochozoa is one of the three major clades that comprise bilateral animals, or Bilateria.
What is special about Lophotrochozoa?
The Lophotrochozoa comprise one of the major groups within the animal kingdom, In turn, the Lophotrochozoa belongs to a larger group within the Animalia called the Bilateria, because they are bilaterally symmetrical with a left and a right side to their bodies.
What is Ecdysozoa and Lophotrochozoa?
2. The Ecdysozoa – which includes the arthropods and several other phyla that periodically molt. Lophotrochozoa. The name Lophotrochozoa comes from the names of the larval type of the two major animal groups included: the Lophophorata and the Trochozoa.
What characteristics do the Lophotrochozoa share?
Lophotrochozoa
- typical protostome, coelomate developmental characters.
- metamerism reflected in external and internal anatomy.
- coelom serving as large, fluid-filled hydrostatic skeleton.
- well-developed nervous system with a cephalic ganglion & ventral, ganglionated nerve cord.
Which description best fits the Lophotrochozoa?
Which description best fits the lophotrochozoa? ( ) As embryos they have three germ layers that will develop into the organ level of organization as adults. ( ) As embryos they have two germ layers that will develop into the tissue level of organization as adults. ( ) Lophotrochozoa are deuterostomes.
Which phyla are included in the Lophotrochozoa?
There are five phyla in the superphylum Lophotrochozoa (also known as the crest or wheel animals): Platyhelminthes, Rotifera, Nemertea, Mollusca, and Annelida. These phyla include animals from flatworms to squids.
What are the two defining characteristics found in organisms that are grouped in the clade Lophotrochozoa?
The two defining characteristics of lophotrochozoans found in many members are (1) the presence of a horseshoeshaped crown of ciliated tentacles (lophophores), and (2) a minute, translucent top-shaped ciliated larvae (trochophores).
Is Lophotrochozoa a phylum?
The lophotrochozoans are triploblastic, possessing an embryonic mesoderm sandwiched between the ectoderm and endoderm found in the diploblastic cnidarians. These phyla are also bilaterally symmetrical: a longitudinal section will divide them into right and left sides that are symmetrical.
Do Lophotrochozoa have a closed circulatory system?
Unlike other mollusks, they have a closed circulatory system, in which the blood is entirely contained in vessels rather than in a hemocoel.
How many phyla are in Lophotrochozoa?
five phyla
There are five phyla in the superphylum Lophotrochozoa (also known as the crest or wheel animals): Platyhelminthes, Rotifera, Nemertea, Mollusca, and Annelida. These phyla include animals from flatworms to squids.
What is the Synapomorphy for the clade Lophotrochozoa?
Synapomorphies = a trait that is shared by two or more taxa and their most recent common ancestor, whose own ancestor in turn does not possess the trait. Lophotrochozoans share a distinctive, horseshoe-shaped feeding structure called a lophophore, and/or a distinctive larval form known as a trochophore.
Are all Lophotrochozoa protostomes?
SpiraliaRibbon wormsPhoronidAnnelidBryozoaLophophor…
Lophotrochozoa/Lower classifications
What is the classification of Lophotrochozoa?
Lophotrochozoa is a monophyletic group of animals that includes annelids, molluscs, bryozoans, brachiopods, platyhelminthes, and other animals that descended from the common ancestor of these organisms. Lophotrochozoa is one of the three major clades that comprise bilateral animals, or Bilateria.
Are mollusks and Lophotrochozoa related?
ONLINE CLASSROOM VERSION The Lophotrochozoaare a diverse group of phyla with similar ribosomal RNA sequences. The annelid worms and mollusks are two large phyla in this group; primitive members of both these phyla share a ciliated larval stage called a trochophore.
What is Lophophorata in biology?
Lophophorata: This group includes the Phoronida and Entoprocta (both small groups) as well as the Bryozoa (“moss” animals) and Brachiopoda (brachiopods), both of which have an extensive fossil record. The feature shared by this group is the lophophore, an unusual feeding appendage bearing hollow tentacles.
What is the difference between Lophotrochozoa and trochophore?
Lophophore is a horseshoe-shaped feeding apparatus surrounded by cirri, found in such groups as Brachiopoda, Bryozoa, and Phoronida, whereas trochophore is a swimming larva found in other taxa, such as Annelida. Thus, “Lophotrochozoa” means more or less “animals that have either a particular type of a larva,…