tarzoo from all other Symphysodon species that have reticulations." "The red spots on the anal fin and in the body distinguishes S. It is an adult male of 132.4mm SL and has the following meristic data: Dorsal fin, X.30 anal fin, XIII.31 vertebrae, 14 abdominal, 17 caudal scales, 58 on row E1, 20 in anterior lateral line, 14 in posterior lateral line. "Because of the nomenclatural and taxonomic problems in Symphysodon, a neotype for S. #Symphysodon discus code#tarzoo from all other Symphysodon species."Kullander believes that the name tarzoo is available under the International Code of Zoological Nomenclature, but outlined some nomenclatural problems: But the description was based on aquarium specimens from Leticia in Colombia, to the far west of the Rio Negro, and the type specimens weren't preserved, so the species name didn't get accepted and the fish was placed in synonymy."The red spots on the anal fin and in the body distinguishes S. The species was first identified by Lyons in 1959, who mentioned the red spots on its anal fin and body. Symphysodon tarzooSymphysodon tarzoo differs in colouration from other Discus species by the presence of red spots on the anal fin and the body and stems from a different mitochondrial lineage to the forms of Discus from the eastern Amazon. The current study is the most comprehensive work on the genus published to date. Previous work on the Symphysodon genus has been hampered by the small number of specimens used and the uncertainty surrounding their origin. The discoveries were made following a study of the colour pattern, morphology and mitochondrial DNA of large numbers of Symphysodon collected from the length of the Amazon river. This form has a parapatric distribution and is recognised as a distinct species, Symphysodon tarzoo." "Surprisingly," wrote Ready, Kullander and Ferreira in the Journal of Fish Biology, "mitochondrial DNA indicates no difference between the two historically described species, Symphysodon discus and Symphysodon aequifasciatus, but shows that non-clinical variation exists with a lineage found in the western Amazon."This form is recognised as a distinct species, Symphysodon tarzoo.""This lineage is consistent with a colour form that is distinct from other Symphysodon lineages. Symphysodon aequifasciatus and Symphysodon discus, the other two Discus species, were found to have no significant genetic differences, suggesting they are very closely related or a single variable species. Scientists from the Swedish Museum of Natural History and Instituto Nacional de Pesquisas da Amazonia (INPA) have named the species Symphysodon tarzoo. Discus found in the western Amazonian region are a distinct species which has been given an old scientific name.
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