Results for “taxon”
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Serrasalmus rhombeusBlack Piranha/Rhom
authority not recorded
Max length450mm SL18in SLTank210 × 45cm84 × 18inTemp22.2–27.8°C72–82°FpHnot recordedThere are in excess of 30 described species of Serrasalmus many of which appear superficially similar and have confusing taxonomic histories. S. rhombeus is among the most convoluted of all with numerous synonyms of which S. niger is the most well-known. There has also been a muddle surrounding the common names "white" and "black" piranha, both of which have been used to describe the species. Of greater interest to both scientists and hobbyists has been the discovery of n...
Serrasalmus serrulatus
authority not recorded
Max length190mm SL7in SLTank120 × 45cm48 × 18inTemp24–28°C75–82°FpHnot recordedThere are currently 24 described species of Serrasalmus, many of which look superficially similar. S. serrulatus occupies a particularly confusing taxonomic position and is very tricky to identify positively. According to scientific literature it is very close in appearance to several congeners, most notably S. eigenmanni, S. hollandi, S. humeralis and S. nalseni. The separation of these is largely based on geographical range and it's possible that some of them may turn out to be synonymous...

Simpsonichthys myersi
de Carvalho, 1971
Max length40mm SL1.6in SLTank45 × 30cm18 × 12inTemp20–27°C68–81°FpH5.5–7.0This species has a somewhat confusing taxonomic history and it remains unclear whether it is conspecific with S. izecksohni (Da Cruz, 1983) or not. The latter is considered to represent a synonym of S. myersi by Costa (2007), but the majority of authors do not follow the conclusions of that study (see below) and continue to view both as valid.