Animals. We have published many versatile articles on animals before. We have discussed most wired, rare, dangerous and many.
Today we are here with something uncommon. From them, mammal species could be seen at any place in the world and today’s article is based on them.
Today in this article we will discuss some bizarre animals from the old-time and they still exist!
like 120 million old ant species or alligator snapping turtle and so on. You would definitely be going to like this article and to know about this rare creations. So here we are.
Here Are 20 Oldest Living Mammal Species On Earth
1. Alligator Gar
This is one of the largest freshwater fishes in North America, Alligator gars are often committed to as “primitive fishes” or “living fossils” because they have kept some morphological characteristics of their primitive relatives such as spiral valve and the ability to breathe both air and water.
2. Alligator snapping turtle
Discovered primarily in United States streams, these animals are one of two existing species of the Chelydridae, a prehistoric turtle family with a long fossil history starting as early as the Maastrichtian stage of the Late Cretaceous period.
Pondering almost 400 pounds (180 kg), the alligator snapping turtle is the substantial freshwater turtle in the world.
Local to the coastlines of the Indian Ocean and Indonesia. Admitted extinct until it was rediscovered in 1938, and they are more closely related to lungfish, reptiles, and mammals than to the common ray-finned fishes.
It is assumed that coelacanth grew into roughly about 400 million years ago.
Like the platypus, the echidna is the only surviving extant mammal that lay eggs. Some scientific studies showed that echidnas divided from platypuses between 48 and 19 million years ago.
And their common parent was aquatic, but echidnas have adjusted to life on land.
For its very unique appearance, the echidna was named after the “Mother of Monsters” in Greek mythology!
5. Elephant shrew
Elephant shrews are widely distributed across the southern part of Africa, this small, quadrupedal mammals parallelling rodents or opossums but, proportionally, are more closely related to elephants, as the name suggests.
As the fossil records, the first ancestors of this grotesque creature lived in Paleogene. which were about 66 – 23 million years ago.
6. Frilled shark
In the depths of 50–200 m, in the Atlantic and the Pacific Ocean, the frilled shark is another scary-looking nautical living fossil.
This mysterious species belongs to one of the oldest still-extant shark ancestors, dating back to at least the Late Cretaceous which was about 95 million years ago and possibly even the Late Jurassic which was also about150 million years ago.
7. Giant freshwater stingray
This one is known as one of the largest freshwater fishes in the world, the giant freshwater stingray grows upwards of 1.9 m across and may reach 600 kg (1,300 lb) in weight.
Its thin, oval pectoral fin disc is considered to have emerged about 100 million years ago. Like many of the animals on the list, this species also faces extinction due to fishing pressure for meat, aquarium display, and habitat degeneration.
8. Goblin shark
Containing up to 4 m long when grown, the goblin shark is a rare, poorly understood species of deep-sea shark.
This species is a bizarre, scary vision suggests the creature has its origins in the ancient era.
The first direct ancestors of the goblin shark lived about125 million years ago. Notwithstanding the terrifying look and large size, this shark species is reasonably harmless to humans.
9. Horseshoe crab
Horseshoe crabs are marine arthropods that live primarily in and around superficial ocean waters on soft sandy or muddy bottoms.
Considered the closest relative to the legendary trilobite, horseshoe crab ranks among the most well-known of the living fossils, having remained virtually unchanged for an astonishing 450 million years.
You can find this in every ocean, from the surface to the deep sea. Jellyfish might have declined the world´s seas as early as 700 million years ago, which makes them the earliest multi-organ animals.
This species is probably the only species on the list whose populations may be increasing globally as a result of overfishing of their natural predators.
11. Martialis heureka ant
Identified in 2000 in the Amazon rainforest in Brazil, this ant species is renowned for its striking morphology.
Referring to the oldest known distinct lineage to have diverged from the ancestors of all other ants, the martial heureka ant is determined to have traveled our planet for about 120 million years.
Residing deep inclinations of coral reefs of the Indian Ocean, and the western and central Pacific Ocean, Nautilus is a type of marine mollusk.
The fossil records indicate this creature has been living on Earth for an incredible 500 million years! Which means it has survived several mass changes of the planet.
Amazingly, these big water birds distinguished by a massive, long break, are amidst the living fossils that have changed the least since the ancient periods.
And the fossil records show that the pelican heredity has existed for at least 30 million years.
This was founded in Early Oligocene deposits in France, the oldest pelican fossil is strikingly similar to their modern form with the beak morphologically.
These birds are egg-laying, duck-billed, beaver-tailed and otter-footed mammal is often seen as the ominous animal in the world.
It’s common that unusual presentation has its roots in the prehistoric era.
The oldest discovered fossil of the modern platypus is just about 100.000 years old, and the first platypus ancestors obtained the supercontinent of Gondwana some 170 million years ago!
15. Sandhill crane
Local to North America and northeastern Siberia, the sandhill crane is huge, up to 10 pounds almost 4.5 kg heavy bird. Impressively a 10-million-year-old fossil from Nebraska is thought to belong to a sandhill crane!
but scientists are not sure if it was the same species. Notwithstanding, another crane fossil dating back to 2.5 million years ago mostly belongs to the sandhill crane.
Conquering subtropical, temperate and sub-Arctic rivers, lakes and coastlines, this animal is sometimes referred to as “primitive fish” because its morphological properties have remained almost unchanged since the earliest fossils, which is some 200 million years old.
Regrettably, over-harvesting, and pollution, sturgeon critically threatened with some species being at the very edge of extinction.
17. Tadpole shrimp
This phenomenon is officially known as Triops longicaudatus. Tadpole shrimp is a freshwater shrimp that matches a miniature horseshoe crab.
This is contemplated as a living fossil because of its basic prehistoric morphology has changed lightly in the last 70 million years, which is exactly match with the bodies of their ancient ancestors that occupied Earth as early as some 220 million years ago.
18. The Chinese giant salamander
Do you know the largest reptile and amphibian in the world? The Chinese giant salamander can be up to 180 cm which is almost 5.9 ft.
Some living part of the Cryptobranchid lineage which dates back to 170 million years ago, when this unique creature is also listed as a critically endangered species due to habitat loss and pollution.
This animal is considered a delicacy and used in traditional Chinese medicine.
Lamprey is a jawless fish characterized by a toothed, funnel-like sucking mouth! Though they are well known for drilling into the flesh of other fish to suck their blood, in fact only a few of the 38 known species do so.
The earliest lamprey fossil found in South Africa about some 360 million years ago but its stunning correspondence with the modern specimens is unquestionable.
In New Zealand, tuataras grow up to 80 cm long and are identified by a spiked on the back, notably pronounced in males.
Although they look like modern-day reptiles and lizards, they have a body structure that scientists believe has persevered basically the same for 200 million years.