What is the defining feature of the lophotrochozoans?
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.
Why are lophotrochozoans grouped as a clade?
The clade Lophotrochozoa is named after the two distinct characteristics of its members; the feeding structure lophophore, which is a ciliated crown of tentacles surrounding a mouth, and the developmental stage trochophore larvae.
What are the defining characteristics of a Lophotrochozoa quizlet?
What are the defining characteristics of a lophotrochozoan? They have a lophophore feeding structure OR a trochophore larval stage.
What phylum are Lophotrochozoans?
Hirudo medicinalis, and all other leeches, belong to the phylum Annelida and are members of the Lophotrochozoa, which also includes mollusks, brachiopods, flatworms, and nemerteans.
Do lophotrochozoans have true tissues?
Eumetazoans have specialized tissues and parazoans don’t. Lophotrochozoa and Ecdysozoa are both Bilataria. Acoela and Cnidaria both possess radial symmetry.
Are mollusks lophotrochozoans?
1. The Lophotrochozoa – which includes the segmented worms, molluscs, lophophorates and several smaller phyla.
What is the primary characteristic that groups phyla within the lophotrochozoans?
What phylum are lophotrochozoans?
What are the evolutionary differences between cnidarians and lophotrochozoans quizlet?
How many legs does it have? What are the evolutionary differences between cnidarians and lophotrochozoans? Lophotrochozoans have two embryonic tissue layers instead of three. Lophotrochozoans are diploblastic and have radial symmetry.
What are the defining characteristics of a Lophotrochozoan group of answer choices?
Lophotrochozoan- have a lophophore (a crown of cilia that surrounds the mouth) or a trochophore (larvae that have cilia around their middle). The clade Lophotrochozoa was identified by molecular data. Some develop a lophophore for feeding, others pass through a trochophore larval stage, and a few have neither feature.
Which is the best description of a Lophotrochozoa?
Jump to navigation Jump to search. Lophotrochozoa (/ləˌfɒtroʊkoʊˈzoʊə/, “crest/wheel animals”) is a clade of protostome animals within the Spiralia. The taxon was established as a monophyletic group based on molecular evidence.
Are there any ortholog groups that fidelity to Lophotrochozoa?
Within the Hox complex there are ortholog groups (e.g., Post 1, Post 2) that show fidelity to either Lophotrochozoa, Ecdysozoa, or Deuterostomia.
What are the sister taxa of the Lophotrochozoa?
Molecular studies suggest that the Platyhelminthes sensu strictu, comprising the sister taxa Catenulida and Rhabditophora, belong to the Lophotrochozoa, whereas the Acoelomorpha represent a separate offshoot at the base of the Bilateria (Hejnol et al., 2009).
How is Lophotrochozoa related to spiralian groups?
It is a cladistic definition (a node-based name), so the affiliation to Lophotrochozoa of spiralian groups not mentioned directly in the definition depends on the topology of the spiralian tree of life, and in some phylogenetic hypotheses, Lophotrochozoa may even be synonymous to Spiralia.