Taxa named by Franz Hermann Troschel

species of fish

species of fish

Brycon is a genus of freshwater ray-finned fishes belonging to the family Bryconidae, and order Characiformes. The fishes in this genus are found in Central and South America, ranging from southern Mexico to northern Argentina. Despite not being closely related to true trout, they are sometimes called South American trout. Members of the genus may be referred to by a number of other different common names in various languages. They reach a maximum length of , depending on the species involved. Some species perform seasonal breeding migrations.

Pygocentrus is a genus of freshwater ray-finned fishes belonging to the family Serrasalmidae, which includes the pacus, piranhas and related fishes. All species are native to tropical and subtropical South America. All the species are predatory, scavengers and may form large schools. The famous red-bellied piranha, Pygocentrus nattereri, is one of four species in the genus.

Myleus is a genus of serrasalmids from South America, where found in the Amazon, Orinoco and São Francisco basins, as well as the river basin of the Guiana Shield. They are found in rivers with moderately or fast-flowing water, including rapids. They are primarily herbivores, but also take some animal matter. Depending on the exact species, they reach up to in standard length, and the adult males have a double-lobed anal fin and filamentous extensions on the dorsal fin. Their strong teeth means that larger individuals can inflict severe bites on humans.

species of fish

species of fish

species of mollusc

species of amphibian

species of echinoderm

Thysanoteuthis is a genus of large squid comprising one well-known species, the diamond squid, and two dubious taxa.

Sciades is a genus of sea catfishes mostly found along the Atlantic Ocean and Caribbean Sea coasts of Central and South America. One species, S. dowii, occurs on the Pacific side from Panama to Ecuador. The genus Ariopsis has been merged with Sciades by some authorities.

species of fish

species of fish

Sternopygus is a genus of glass knifefishes found in tropical and subtropical South America (south to the Río de la Plata Basin), and Panama. It is the only extant member of the subfamily Sternopyginae, with the related fossil genus Humboldtichthys also known from Bolivia.

species of fish

species of fish

species of echinoderm

species of fish

species of fish

species of fish

species of fish

Hydrolycus is a genus of freshwater ray-finned fishes belonging to the family Cynodontidae, the dogtooth characins. These fishes are found in tropical South America, where found in the Amazon and Orinoco basins, as well as rivers of the Guianas. The genus includes the largest dogtooth characins, reaching up to in length. They have long, pointed teeth (shorter and less extreme in H. wallacei) used for spearing their prey, generally smaller fish. In a study of the stomachs of 45 individuals, most were empty, but among the remaining the prey fish were 15–50% of the length Hydrolycus itself.

species of fish

species of fish

Rhamphichthys is a genus of freshwater ray-finned fish belonging to the family Rhamphichthyidae, the sand knifefishes. These fish are eel shaped (or anguiform) with a distinct beak like snout which gave them their name. Like most other knifefish Rhamphichthys species have electrical organs that help them live in the murky waters of South America.

species of fish

species of fish

Chilodus is a genus of freshwater ray-finned fishes belonging to the family Chilodidae, the headstanders. The fishes in this genus are from South America They live in the Orinoco and Amazon Basins, as well as in various rivers in the Guianas.

species of fish

species of echinoderm

species of echinoderm

Erethistes is a genus of South Asian river catfishes.

Amblyrhynchotes is a genus of pufferfishes native to the Indian and Pacific Oceans.

Cliopsis Troschel, 1854 is a genus of sea angels belonging to the family Cliopsidae. It is monotypic, being represented by the single species Cliopsis krohnii.

species of reptile

Catoprion is a genus of freshwater ray-finned fishes belonging to the family Serrasalmidae, which includes the pacus, piranhas and related fishes. These fishes are found in tropical South America, including the basins of the Amazon, Essequibo, Orinoco and Paraguay rivers. It was believed to be a monotypic genus until the 2020 description of C. absconditus.

Pygopristis is a monospecific genus of freshwater ray-finned fishes belonging to the family Serrasalmidae, which includes the pacus, piranhas and related fishes.. The only species in the genus is Pygopristis denticulata, also known as the lobetoothed piranha,. This species 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. Like other piranhas, it is found in freshwater, with specimens of this species typically found in acidic clearwater or blackwater environments. Despite their

Pseudochrominae is a subfamily of ray-finned fishes, one of four subfamilies that make up the family Pseudochromidae, the species within the subfamily are commonly called dottybacks. They are small reef-associated marine fish which have an Indo-Pacific distribution.

species of fish