Pygopristis

Pygopristis denticulata, also known as the lobetoothed piranha, is a species of piranha.[1] It is a rare South American characiform fish found in the Orinoco River basin, rivers of the northern and eastern Guiana Shield, and tributaries of the lower Amazon River.[2] Like other piranhas, it is found in freshwater,[1] with specimens of this species typically found in acidic clearwater or blackwater environments. Despite their ferocious reputation, many piranhas have broader diets;[1] this species usually feeds on aquatic insects, small fish, and fruits.[3]

Pygopristis
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Actinopterygii
Order:	Characiformes
Family:	Serrasalmidae
Genus:	Pygopristis J. P. Müller & Troschel, 1844
Species:	P. denticulata
Binomial name
Pygopristis denticulata (G. Cuvier, 1819)
Synonyms
Serrasalmus denticulatus G. Cuvier, 1819 Serrasalmus punctatus Jardine, 1841 Pygopristis fumarius J. P. Müller & Troschel, 1845

P. denticulata has pentacuspid teeth and a middle cusp that is usually only slightly larger than the other cusps. This is unlike other piranhas, which have tricuspid teeth with a larger middle cusp, making the teeth appear triangular.[4] Within the family Serrasalmidae, P. denticulata is more closely related to Catoprion than it is to the majority of species traditionally considered true piranhas.[4]

P. denticulata grows to about 20.0 cm (7.9 in) in total length.[2] It has 62 chromosomes.[4]