Table of Contents
What animals are 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.
Which two groups of animals make up the Lophotrochozoa?
The name Lophotrochozoa comes from the names of the two major animal groups included: the Lophophorata and the Trochozoa.
What are the characteristics of animals classified under Lophotrochozoa?
The lophotrochozoans are triploblastic and possess an embryonic mesoderm sandwiched between the ectoderm and endoderm found in the diploblastic cnidarians. These phyla are also bilaterally symmetrical, meaning that a longitudinal section will divide them into right and left sides that are symmetrical.
What makes up the Lophotrochozoa?
The name Lophotrochozoa comes from the names of the larval type of the two major animal groups included: the Lophophorata and the Trochozoa. The Trochozoa contain many worm-like forms, including the segmented worms (Phylum Annelida) but it also includes the Mollusca (snails, squid, octopods, clams, etc).
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 difference between Lophotrochozoa and Ecdysozoa?
What is the difference between Lophotrochozoa and Ecdysozoa? Ecdysozoans have the ability to shed their exoskeleton several times throughout their life span, whereas lophotrochozoan are the animals who possess a trochophore larvae and a feeding structure called lophophore.
Is nematoda a Lophotrochozoa?
Lophotrochozoa is one of the three major clades that comprise bilateral animals, or Bilateria. Another superphylum Ecdysozoa, comprising nematodes, arthropods, and their relatives and which are defined by molting, are the sister taxon to Lophotrochozoa.
What is the main difference between the Lophotrochozoa and the Ecdysozoa?
Is Nematoda a Lophotrochozoa?
Is Cnidaria a Lophotrochozoa?
The Cnidarians (jellyfish and their relatives) represent the basal animals. The Lophotrochozoans (Phyla Platyhelminthes, Mollusca, Annelida and Rotifera) represent one of the major groups of invertebrates outside of the arthropoda.
What characters can classify organisms Ecdysozoa or Lophotrochozoa?
All Lophotrochozoans and Ecdysozoans share these characteristics:
- bilateral symmetry.
- triploblastic embryo develops. ectoderm. endoderm. mesoderm.
- protostome characteristics.
- may be either coelomate or pseudocoelomate (depending on phylum)
- true tissues, true organs and true organ systems: integumentary system. digestive system.
Is Nematoda a Lophotrochozoa or Ecdysozoa?
Another superphylum Ecdysozoa, comprising nematodes, arthropods, and their relatives and which are defined by molting, are the sister taxon to Lophotrochozoa.
Is porifera Lophotrochozoa or Ecdysozoa?
154 Cards in this Set
| Porifera Tissue layers | 0 |
|---|---|
| Porifera Symmetry | asymmetrical |
| Porifera Digestive System | intracellular |
| Porifera Deuterostome or Protostome | neither |
| Porifera Lophotrochozoa or Ecdysozoa | neither |
Is platyhelminthes a Lophotrochozoa?
Phylum Platyhelminthes. The flatworms are acoelomate organisms that include many free-living and parasitic forms. Most of the flatworms are classified in the superphylum Lophotrochozoa, which also includes the mollusks and annelids. The Platyhelminthes consist of two lineages: the Catenulida and the Rhabditophora.
Is Platyhelminthes a Lophotrochozoa?
Are molluscs Ecdysozoans?
Most arthropods (insects, crustaceans, myriapods, and chelicerates, belonging to the superphylum of Ecdysozoa) and some species of mollusks and annelids (superphylum Lophotrochozoa) have between 2 and 27 Toll genes.
Which of the following animals are ecdysozoans?
The ecdysozoan phyla are the arthropods (e.g., insects, crustaceans, myriapods, and chelicerates), onychophorans (velvet worms), tardigrades (water bears), nematodes (roundworms), nematomorphs (horsehair worms), priapulids, loriciferans, and kinorhynchs (mud dragons).
How many species of ecdysozoans are there?
4.5 million living
In terms of species numbers and niche diversity, the Ecdysozoa is far and away the most significant clade of animals with over a million described species and an estimated total of more than 4.5 million living species (Chapman 2005).
Which phylogenetic studies confirm the concept of Lophotrochozoa?
Phylogenomic analyses of lophophorates (brachiopods, phoronids and bryozoans) confirm the Lophotrochozoa concept. . 2007. Homology of ciliary bands in spiralian trochophores. . 1999. CAP3: a DNA sequence assembly program.
What animals are in the phylum Lophotrochozoa?
The clade includes animals like annelids, molluscs, bryozoans, brachiopods, and platyhelminthes. Lophotrochozoa was defined in 1995 as the “last common ancestor of the three traditional lophophorate taxa ( brachiopods, bryozoans, and phoronid worms), the mollusks and the annelids, and all of the descendants of that common ancestor”.
What are the characteristics of Lophotrochozoa?
Lophotrochozoans are characterized by their spiral cleavage pattern and trochophora larvae and include the annelids and molluscs among others. 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.
What are the basal groups of Lophotrochozoa?
The Lophotrochozoa has basal Cycliophora and Mollusca groups, and more derived Lophophorate, Nemertea and Annelida groups.