Where are corydoras catfish from?

What is a Callichthyidae?

Callichthyidae is a family of catfishes ( order Siluriformes ), called armored catfishes due to the two rows of bony plates (or scutes) along the lengths of their bodies. It contains some of the most popular freshwater aquarium fish, such as many species in the genus Corydoras .

When was the first callichthyid fossil found?

The first known fossil species of callichthyid is Corydoras revelatus from Salta, Argentina, of the late Paleocene. This species is tentatively placed in Corydoras, but is unambiguously a member of the subfamily Corydoradinae. It indicates that the lineages leading to the two callichthyid subfamilies occurred at least by the late Paleocene.

Where do callichthyids live in the Amazon?

Callichthyidae present the highest species richness in the headwaters of the Amazonas drainage and those rivers draining the Guiana Shield. The subfamily Corydoradinae is found east of the Andes and north of the Rio de La Plata system.

How do callichthyids move on land?

Some callichthyids are able to absorb air through their hind guts to move short distances on land. Air stored in their digestive tracts also accounts for 75% of the necessary air for neutral buoyancy. Breeding habits are also variable. Corydoradines breed over the substrate (such as rocks, logs, or leaves) as most catfish.

How many species of catfish are in the family Corydoras?

Within the family Callichthyidae, the two subfamilies have eight genera and about 177 species, accounting for about 7% of all catfish. Most of these species are in the genus Corydoras, the largest catfish genus.

Where are catfish found in the world?

These fish are found everywhere on the planet. Wherever there is freshwater, there will be some kind of native catfish there. They’re found in freshwater lakes, rivers, swamps, wetlands, marshes, pond and wherever there is freshwater. These are very hardy fish, meaning they cant be killed easily.

What was the first fossil ever found?

The first fossil ever found was an archaeopteryx (ahr-kee-op-tuh-riks) fossil. It was found in Bavaria in 1861. An archaeopteryx is a bird-like dinosaur that could be found 150.8 million years ago to 125.45 million years ago.

Where did the first fish come from?

The spectacular Burgess Shale fossil site in British Columbia where the oldest fish, Metaspriggina, was found. Dr Diegio Garcia-Bellido, SA Museum. The origins of fishes have long been shrouded in mystery due to the poor preservation of fossils lacking hard bony skeletons.

What is the size of a callichthyid?

Callichthyids are fairly small catfish, and range in size from some tiny Corydoras species that do not exceed 2 cm (0.79 in) to Hoplosternum littorale, which some sources list as growing to a length of up to 24 cm (9.4 in) TL. The mouth is small and ventral with one or two pairs of well-developed barbels.

What type of fish is a Callichthyidae?

Callichthyidae is a family of catfishes (order Siluriformes), called armored catfishes due to the two rows of bony plates (or scutes) along the lengths of their bodies. It contains some of the most popular freshwater aquarium fish, such as many species in the genus Corydoras.

What is the origin of fish finger?

The term “fish finger” is first referenced in a recipe given in a popular British magazine in 1900, and the dish is often considered symbolic of the United Kingdom.

How many fossils have been found and dated?

About 167 fossils were found and dated to about 1.56 billion years ago. Before the new discovery, the earliest known examples of multi-cellular life of this size weren’t seen in the fossil record until about 600 million years ago.

Where are the oldest fish fossils found?

The spectacular Burgess Shale fossil site in British Columbia where the oldest fish, Metaspriggina, was found. Dr Diegio Garcia-Bellido, SA Museum. On the origin of fishes The origins of fishes have long been shrouded in mystery due to the poor preservation of fossils lacking hard bony skeletons.

What was the first modern skeletal feature to evolve?

It is thought to be the earliest known fish to possess important facial bones seen in most fish, reptiles and mammals today, but its other bones are much more primitive. That suggests the face was the first modern skeletal feature to evolve.

Are there any prehistoric fish that have gone extinct?

Fish that have become recently extinct are not usually referred to as prehistoric fish. The coelacanth was thought to have gone extinct 66 million years ago, until a living specimen belonging to the order was discovered in 1938 off the coast of South Africa.

When did the Pholidophorus first appear in the fossil record?

This clade first appears in the fossil record during the Triassic. Once diverse, they are only represented by a few species today. Pholidophorus was an extinct genus of teleost, around 40 centimetres (16 in) long, from about 240–140 Ma.

What is the difference between a catfish and a cavefish?

A single species, Aspidoras mephisto, is a cavefish. Callichthyids are fairly small catfish, and range in size from some tiny Corydoras species that do not exceed 2 cm (0.79 in) to Hoplosternum littorale, which some sources list as growing to a length of up to 24 cm (9.4 in) TL.

Are there any callichthyids in South America?

Some species are quite common in South America and are fished commercially. They are usually cooked in their bony armor. Some callichthyids, especially species of Corydoras, are popular as ornamental fish in the fishkeeping hobby.

Who invented fish fingers?

The commercialization of fish fingers may be traced to 1953 when the American company Gorton-Pew Fisheries, now known as Gorton’s, was the first company to introduce a frozen ready-to-cook fish finger; the product, named Gorton’s Fish Sticks, won the Parents magazine Seal of Approval in 1956. The developer of those fish sticks was Aaron L. Brody .

What happened to fish fingers after WW2?

The food restrictions during and after WWII expanded the consumption of fish fingers, but companies struggled to maintain decent quality.

What were the first fossil fishes like?

The first fossil fishes are known from scant and often ambiguous fossil remains, and research published today in Nature gives us the first clear picture of exactly what these earliest fishes were really like.

Where did fish and chips come from?

The origins of fish and chips is not entirely clear. Fried fish was first introduced and sold by East End Jews, while chips first took off in Lancashire and Yorkshire. But we may never know who was the first to bring the magical combination together.

How old do fossils have to be?

A specimen must be about 10,000 years old to be considered a fossil and many of them on the fossil record are millions of years old. The oldest fossils are over 3.5 billion years old, which may mean that life emerged relatively early in the Earth’s history (Earth is 4.543 billion years old).

Are there any out-of-place species in the fossil record?

Many other out-of-place species that were thought to have perished millions of years ago have been found to be alive today. One recent discovery was the wollemia nobilis tree found in Australia near Sydney. A small group of them was found by park ranger David Noble, but they are not found in the fossil record more recently than 2 million years ago.