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Turbellaria
Sign in to saveThe Turbellaria are one of the traditional sub-divisions of the phylum Platyhelminthes (flatworms), and include all the sub-groups that are not exclusively parasitic. There are about 4,500 species, which range from to large freshwater forms more than long or terrestrial species like Bipalium kewense which can reach in length. All the larger forms are flat with ribbon-like or leaf-like shapes, since their lack of respiratory and circulatory systems means that they have to rely on diffusion for internal transport of metabolites. However, many of the smaller forms are round in cross section. Most
Turbellaria are a major group of flatworms containing about 4,500 species that are not parasitic, ranging from tiny organisms to large freshwater and land-dwelling forms that can exceed several centimeters in length. They are notable for their flat or ribbon-like body shapes, which allow them to survive without respiratory or circulatory systems by relying on diffusion to transport nutrients internally.
AI-generated from the Wikipedia summary — may contain errors.
Species
flatworms
Turbellaria
CLASS
- KingdomAnimalia
- PhylumPlatyhelminthes
- ClassTurbellaria
via GBIF
Museum specimens
- Specimen records
- 3,792
- With media
- 373
- Collections
- YPM, CAS, USNM
- Recorded in
- United States, Ecuador
Research
2,453 papers- Chemoreception in Turbellaria.ReviewExperimental biology · 1989Ferrero EA, Bedini C
- Nutritional and respiratory pathways to parasitism exemplified in the Turbellaria.ReviewInternational journal for parasitology · 1997Jennings JBDOI: 10.1016/s0020-7519(97)00010-6
- [The nervous system structure of turbellaria].ReviewArkhiv anatomii, gistologii i embriologii · 1972Krichinskaia EB
- Evidence that two types of 18S rDNA coexist in the genome of Dugesia (Schmidtea) mediterranea (Platyhelminthes, Turbellaria, Tricladida).Molecular biology and evolution · 1996Carranza S, Giribet G, Ribera C et al.DOI: 10.1093/oxfordjournals.molbev.a025643
- New insights into the karyotype evolution of the free-living flatworm Macrostomum lignano (Platyhelminthes, Turbellaria).Scientific reports · 2017Zadesenets KS, Schärer L, Rubtsov NBDOI: 10.1038/s41598-017-06498-0
- Expression of a neuropeptide similar to allatotropin in free living turbellaria (platyhelminthes).Tissue & cell · 2011Adami ML, Damborenea C, Ronderos JRDOI: 10.1016/j.tice.2011.07.005
- Asexual reproduction in acoelous Turbellaria.The Yale journal of biology and medicine · 1960HANSON ED
- [Lipids of free-living Penecurva sibirica turbellaria].Zhurnal evoliutsionnoi biokhimii i fiziologii · 1976Vykhrestiuk NP, Nikitenko TB, Iarygina GV
via PubMed
~9 min read
Encyclopedic overview
10 sectionsContents
- Description
- Features common to all Platyhelminthes
- Features specific to Turbellaria
- Diet and digestion
- Nervous system
- Reproduction
- Taxonomy and evolution
- See also
- References
- External links
The Turbellaria are one of the traditional sub-divisions of the phylum Platyhelminthes (flatworms), and include all the sub-groups that are not exclusively parasitic. There are about 4,500 species, which range from to large freshwater forms more than long or terrestrial species like Bipalium kewense which can reach in length. All the larger forms are flat with ribbon-like or leaf-like shapes, since their lack of respiratory and circulatory systems means that they have to rely on diffusion for internal transport of metabolites. However, many of the smaller forms are round in cross section. Most are predators, and all live in water or in moist terrestrial environments. Most forms reproduce sexually and with few exceptions all are simultaneous hermaphrodites.
The Acoelomorpha and the genus Xenoturbella were formerly included in the Turbellaria, but are no longer regarded as Platyhelminthes. All the exclusively parasitic Platyhelminthes form a monophyletic group Neodermata, and it is agreed that these are descended from one small sub-group within the free-living Platyhelminthes. Hence the "Turbellaria" as traditionally defined are paraphyletic.
Excerpted from Wikipedia’s “Turbellaria” article, available under the CC BY-SA 4.0 licence.