| Paracetopsis | |
|---|---|
 | |
| Paracetopsis bleekeri | |
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Actinopterygii |
| Order: | Siluriformes |
| Family: | Cetopsidae |
| Subfamily: | Cetopsinae |
| Genus: | Paracetopsis Bleeker, 1862 |
| Type species | |
| Paracetopsis bleekeri Bleeker, 1862 | |
| Synonyms | |
| |
Paracetopsis is a genus of whale catfishes found in tropical South America.
There are currently three recognized species in this genus: [1]
Paracetopsis species are known from river drainages of the Pacific coast of Peru and Ecuador.
Paracetopsis species can be distinguished from species of all other genera in the Cetopsinae by the combination of the possession of a vomerine tooth patch with two or more rows of teeth and a medial gap between the contralateral components of the tooth patch. [2] Like in other species of cetopsines, mature males have elongated distal filaments of the dorsal and pectoral fin rays and a convex (instead of straight) margin to the anal fin. [2]
The body is relatively elongate; anteriorly the body is not compressed much, but becomes progressively compressed posteriorly. The lateral line is complete and midlateral; though unbranched in P. bleekeri and P. esmeraldas, in P. atahualpa the lateral line has a few ventrally direct branches on the caudal peduncle. The dorsal profile is straight to slightly convex; the ventral profile is convex at the abdomen and straight posteriorly. The caudal peduncle depth is approximately equal to its length. The head in profile is acutely triangular overall with a bluntly rounded snout. The eyes are placed on the sides of the head and are visible from above, but not from below. The mouth is inferior and the width is about one-half the length of the head. They have three pairs of barbels, one pair of slender maxillary barbels and two pairs of mental barbels; all three pairs of barbels are approximately the same length. The caudal fin is moderately to deeply forked and symmetrical with the tips of the lobes slightly rounded. The base of the anal fin is comparatively long. The pelvic fins are also usually moderately long. [2]
P. atahualpa has shorter pelvic fins and is darker in colour than P. bleekeri. P. atahualpa has a maxillary barbel with a distinctly dark base instead of a pale base and a distinct notch behind the head that is not present in P. esmeraldas. Both P. atahualpa and P. esmeraldas have a distinct patch of pigment on the operculum not present in P. bleekeri. [2]
The Cetopsidae are a small family of catfishes, commonly called the whale catfishes.
This glossary of ichthyology is a list of definitions of terms and concepts used in ichthyology, the study of fishes.
Corydoras panda is a species of catfish belonging to the genus Corydoras, of the family Callichthyidae, and is a native member of the riverine fauna of South America. It is found in Peru and Ecuador, most notably in the Huanaco region, where it inhabits the Rio Aquas, the Rio Amarillae, a tributary of the Rio Pachitea, and the Rio Ucayali river system. The species was first collected by Randolph H. Richards in 1968, and was named Corydoras panda by Nijssen and Isbrücker in 1971. The specific name is an allusion to the appearance of the fish, which possesses large black patches surrounding the eyes, reminiscent of those found on the giant panda. Accordingly, the common names for this fish, which is a popular aquarium species, are panda corydoras and panda catfish.
Auchenipterichthys is a genus of driftwood catfishes found in South America.
Helogenes is a genus of whale catfish found in tropical South America.
Cetopsidium is a genus of catfishes of the family Cetopsidae.
Denticetopsis is a genus of catfishes of the family Cetopsidae.
Breitensteinia is a genus of catfishes of the family Akysidae. It includes three species.
Acrochordonichthys is a genus of catfishes of the family Akysidae. It includes ten species.
Cetopsis is a genus of catfishes of the family Cetopsidae.
Entomocorus is a genus of catfishes of the family Auchenipteridae.
Auchenipterus is a genus of driftwood catfishes.
Synodontis grandiops is a species of upside-down catfish endemic to the Democratic Republic of the Congo, Burundi, and Tanzania, where it is only known from Lake Tanganyika. It was first described by Jeremy John Wright and Lawrence M. Page in 2006, from specimens collected at multiple points along the shore of Lake Tanganyika. The species name is a Latinized combination of the Latin "grandi", meaning large or big, and the Greek "ops", meaning eye, a reference to the relatively large eyes of this fish.
Synodontis lucipinnis is a species of upside-down catfish endemic to Zambia, where it is only known from the Musende Rocks area (Mpulungu) of Lake Tanganyika. It was first described by Jeremy John Wright and Lawrence M. Page in 2006. The species name "lucipinnis" is derived from a combination of the Latin luci, meaning bright or clear, and the Latin pinnis, meaning fin. This refers to the light coloration in a patch on the base of the fins of this species.
Astyanax microschemos is a species of characid fish from Brazil. It belongs to the A. scabripinnis species complex and differs from other species outside it by having a lower number of branched anal fin rays and its shallow body depth being about 26.9-29.7 vs more than 35% of its standard length (SL). Compared to species of its own complex, it can be distinguished by the combination of its shallow body depth, and smaller interorbital width. The species name comes from the Greek mikroschemos, meaning "low stature", which refers to the shallow body depth of the animal.
Deuterodon pelecus is a species of characid fish from Brazil. It can be distinguished from other species by: its body depth ; its short and pointed snout smaller than the orbital diameter; and a reduced number of branched anal fin rays. D. pelecus also differs from members of its genus by its characteristic color pattern. It possesses a single humeral spot that is constricted to the region above the lateral line; at the same time it shows a conspicuous midlateral body stripe from opercle to the caudal fin base, an autapomorphy of this precise species. Other Deuterodon species have a humeral spot that is vertically or horizontally elongate and have the midlateral stripe becoming faint near that humeral spot. The species name is derived from the Greek pelekus, meaning "axe", referring to the pigmentation shape resulting from the adjoinment of the humeral spot with the midlateral stripe.
Guyanancistrus nassauensis is a species of catfish belonging to the family Loricariidae, the suckermouth armored catfishes. It is discovered in 2005 and formally described in 2018. G. nassauensis is a rare species, highly endemic to the Nassau Mountains in Suriname, and is threatened with extinction by proposed or ongoing mining activities.
Huigobio exilicauda is a species of cyprinid fish found in the Pearl River basin in China. All of the specimens were collected in the Pearl River basin in Guangdong Province, China, in 1976. It is sometimes considered an ambiguous synonym of Huigobio chenhsienensis. Differs from Huigobio chenhsienensis in that it has a thin caudal peduncle ; and a narrower interorbital gap than eye.
Labeo heladiva, is a species of freshwater fish in the family Cyprinidae. It is endemic to Sri Lanka. Earlier considered as the same species as Labeo dussumieri in India, recent phylogenetic and physiological differences suggest that Sri Lankan population is a distinct species.
Cetopsis candiru, also known as candiru, candiru açú, candiru cobra or canero, is a carnivorous species of whale catfish found in the Amazon basin of Peru, Brazil and Bolivia. Similar to Cetopsis coecutiens, Cetopsis candiru is a large species of the genus Cetopsis and a widespread scavenger, known for its voracious feeding and the habit of burrowing into the carcasses of dead animals and humans. Despite its name, it is not closely related to the bloodsucking Candiru.