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Accordingly, are annelids ecdysozoa?
This grouping scheme is widely accepted, although some zoologists still hold to the original view that Panarthropoda should be classified with Annelida in a group called the Articulata, and that Ecdysozoa are polyphyletic. The other idea about the phylogeny of the Ecdysozoa is called the coelomate hypothesis.
Additionally, which is a Synapomorphy of Ecdysozoans? Ecdysozoa is a clade composed of eight phyla: the arthropods, tardigrades and onychophorans that share segmentation and appendages and the nematodes, nematomorphs, priapulids, kinorhynchs and loriciferans, which are worms with an anterior proboscis or introvert.
Then, what traits do all Ecdysozoans share?
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.
What is the difference between Lophotrochozoans and Ecdysozoans?
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.