Animalscaretips
- Are Acoelomorpha bilaterians?
- What is phylum Acoelomorpha?
- How does Acoelomorpha reproduce?
- Is Acoelomorpha a Platyhelminthes?
- Is Acoela Diploblastic?
- How do free living flatworms reproduce?
- Are Acoelomorpha Triploblastic?
- Are Acoelomorpha Protostomes?
- Are Acoelomate flatworms basal Bilaterians?
- Are Acoela Deuterostomes?
- What's the difference between Acoel and Platyhelminth flatworms?
- Does Platyhelminthes have a cuticle?
- Do Acoela have specialized tissues?
- Does Acoela have Gastrovascular cavity?
- Is Acoela a benthic organism?
Are Acoelomorpha bilaterians?
Actually, Acoelomorpha appeared to constitute a separate, deep-branching phylum, kingpin of bilaterian evolution. Yet their evolutionary affinities remain enigmatic as they might be the sister-group either to all other bilateral animals or to all deuterostomes.
What is phylum Acoelomorpha?
Acoelomorpha is a clade comprised of three phyla that have been interpreted as closely related 'primitive turbellarians': acoels, nemertodermatids, and Xenoturbella.
How does Acoelomorpha reproduce?
Reproduction: Reproductive System: Oviparous and hermaphroditic. Sperm with 9+2 flagella (the flatworms have 9+1 flagella). Some reproduce asexually by budding.
Is Acoelomorpha a Platyhelminthes?
The Acoelomorpha have been included in the phylum Platyhelminthes since it was created (Gegenbaur 1859) and are divided in two major clades: acoels and nemertodermatids. Platyhelminthes were, at the same time, split in three major lineages: Acoelomorpha, Catenulida and Rhabditophora (Ehlers 1985).
Is Acoela Diploblastic?
The Acoela may be direct descendants of the earliest line of animals to diverge from diploblastic organisms with the beginnings of triploblastic features: a middle tissue layer and bilateral symmetry.
How do free living flatworms reproduce?
Flatworms are hermaphroditic (having both male and female sex organs) and they typically reproduce both sexually and asexually. The majority of sexual reproduction is through cross-fertilization (where both individuals fertilize each other).
Are Acoelomorpha Triploblastic?
2000, 2001). Acoel worms have historically been placed in the triploblastic phylum Platyhelminthes. However, recent molecular and morphological evidence suggests that this taxon falls outside of the Platyhelminthes in the new phylum Acoelomorpha, the most basal bilaterian-triploblastic taxon (Baguñá & Riutort 2004).
Are Acoelomorpha Protostomes?
Boll. Analyzing such features, it seems obvious that Acoelomorpha is a basal group of bilateral animals and may be the reminiscent of a primitive group of animals later almost completely extinct by their most complex descendants, the true protostomes and deuterostomes.
Are Acoelomate flatworms basal Bilaterians?
The acoelomate and 'pseudocoelomate' metazoans, including the Platyhelminthes, long considered basal bilaterians, have been referred to positions within these clades by many authors.
Are Acoela Deuterostomes?
Several phylogenetic studies indicate that Acoelomorpha is indeed a basal group of bilateral animals. ... The group's explanation is that Acoelomorpha, as well as Xenoturbellida, have a sequence of microRNA (miR-103/107/2013) which is exclusive to Deuterostomia, so they would also be deuterostomes.
What's the difference between Acoel and Platyhelminth flatworms?
Acoel flatworms are small marine worms traditionally considered to belong to the phylum Platyhelminthes. However, molecular phylogenetic analyses suggest that acoels are not members of Platyhelminthes, but are rather extant members of the earliest diverging Bilateria.
Does Platyhelminthes have a cuticle?
Parasitic flatworms (Platyhelminth) possess a cuticle on ectoderm but it is flexible, and free of mineral, thus cannot be considered as exoskeleton.
Do Acoela have specialized tissues?
Eumetazoans have specialized tissues and parazoans don't. Lophotrochozoa and Ecdysozoa are both Bilataria. Acoela and Cnidaria both possess radial symmetry.
Does Acoela have Gastrovascular cavity?
The Platyhelminthes are acoelomate flatworms: their bodies are solid between the outer surface and the cavity of the digestive system. Most flatworms have a gastrovascular cavity rather than a complete digestive system; the same cavity used to bring in food is used to expel waste materials.
Is Acoela a benthic organism?
They are found worldwide in marine and brackish waters, usually having a benthic lifestyle, although some species are epibionts. Members of the class Acoela lack a conventional gut, so that the mouth opens directly into the mesenchyme, i.e., the layer of tissue that fills the body.
