Olisthiroskarcharias

Olisthiroskarcharias (meaning Slippery shark in Greek). Are the first class under Karcharias. Although they are under a new superclass they still count as wish, because they still have gills. They are distinguished from the other classes of Karcharias by the fact that they have both gills and lungs, and they also have smooth skin that they need to keep moist, like an amphibian. All Earth sharks and hharks have tiny teeth-like structures called placoid scales, also known as dermal denticles, Olisthiroskarcharias have lost these for an unknown reason. They're also distinguished from the clade Karchariasmorpha by the fact that they have legs and lungs, and the clade Karchariaiformes by the fact that they have lungs. They evolved 326,333,333 years ago, and their point of origin is Secundoterra, Unlike amphibians and most other amphibian-like classes on Hume III, which first came about in swamp biomes, these are believed to have either rose in rivers or the shoreline of beaches in desert biomes. This is believed because A.R.F. researchers have discovered evidence of the areas where the earliest known fossils of them were found was a desert area. Evidence to support this hypothesis is the fact that they kept their Dorsal fins and tail fins, probably to use them as thermoregulation in the desert, but some skeptics have pointed out that because their skeletons are made of cartilage they don't preserve easily and that there possibly could have been earlier specimens from before the desert specimens that we just haven't found yet, or were never fossilized. The earliest known specimen in the Hume III fossil record is Paliodont paliodont, the first two specimens were just a couple of teeth, the third specimen was an entire jaw bone with a full set of teeth, and finally the fourth specimen was a fully preserved skeleton. The first living specimen found was Catulusluto catulusluto purpura. There are two subclasses, Metamorphia and Nonmetamorphia. These two subclasses are distinguished from each other by the fact that Metamorphia starts out life in a tadpole-like form called a sharkpole and Nonmetamorphia are born already with legs and lungs. Metamorphia would give rise to the two clades that would fully took over Secundoterra, Karchariaslandkarcharia which kept the cartilaginous skeleton of its ancestors, while the other clade Karchariasoston replaced it with a fully bony skeleton. Unlike Amphibians, they are not cold-blooded, they are mesothermic. They don't lay eggs, they give birth live.

Anatomy

Olisthiroskarcharias are the most shark-like/hhark-like out of any Karcharias, they look like sharks with legs, the only thing they're missing is the placoid scales. On the head region, they have eyes that can curl back into the head just like a great white shark for protection, how good their eyesight is all depends on the clade. They all have ampullae, the ampullae of Lorenzini are special sensing organs called electroreceptors, forming a network of jelly-filled pores. They have nostrils, how good their sense of smell is all depends on the clade. Like sharks and hharks, Olisthiroskarcharias have an acute sense of hearing and are sensitive to low-frequency signals. They're able to track sounds and are particularly attracted to sounds made by wounded prey. Their ears are located on either side of their head, behind the eyes. From the outside, these are visible as two small holes. Their mouths are full of razor-sharp teeth that can cut through almost anything like a knife. These triangular-shaped teeth are specially designed to kill and eat prey. Some Olisthiroskarcharias can actually have as many as 15 rows of teeth in each jaw! The land bull hhark has as many as 50 rows of teeth. Olisthiroskarcharias have the ability to continuously regenerate their teeth. They lose at least 15,000 teeth over a lifetime, but each lost tooth can be regrown over a period of days or months. An Olisthiroskarcharias is capable to replace lost teeth as many as 25 times over the course of their lifetime. They have a tongue, this tongue is used for taste, Olisthiroskarcharias have small bumps in their mouths that contain numerous taste buds. This means that Olisthiroskarcharias do taste their food and will refuse a meal if it isn't palatable. And some Olisthiroskarcharias have a frog-like tongue. All Olisthiroskarcharias have free nerve endings beneath the skin's surface that are touch receptors. On their neck they can have up to five gills and as little as two, but one species has only one gill on each side of it's neck, that species is The one gilled land hhark. When they go up on to land they can close their gills, which lets them stay out of the water for a little longer, but they will have to go back to the water. Most of them have four leg, but some have lost the second pair of legs. They have no toes, most just have one big claw on the end of their feet. Most have their legs in a sprawling posture, but the clade Orthikarcharpodia which have an erect posture. Most Earth sharks have two dorsal fins, hharks normally have three, but Olisthiroskarcharias, and all other Karcharias, and their closest relatives, and their extinct relatives, have only two or one, with the second one normally being on the tail. Some Olisthiroskarcharias have venomous spines in the front of each dorsal fin. All Olisthiroskarcharias have a tail, some have a tail with the second dorsal fin, anal fin, and two tail fins on it, some have a tail with just two tail fins on it, some have two tail fins but they are slightly reduced, and others just have a tail with no fins. Some clades had two claspers, just like sharks and hharks, some clades lost one and have only one clasper, others just mate by putting their two cloacas together.

Taxonomy

Kingdom: Animalisaliena

Phylum: Xenochordata

Class: **Olisthiroskarcharias**

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**Subclasses under Olisthiroskarcharias**

Subclass: Metamorphia

 **Clades under Metamorphia**

 Clade: Karchariasoston

 Clade: Karchariaslandkarcharia

Subclass: Nonmetamorphia

 **Clades under Nonmetamorphia**

 Clade: Orthikarcharpodia

 Clade: Oikarcharieseinaioiidioiomorpha

 Clade: Oikarcharieseinaioiidioiformes

 Clade: Oikarcharieseinaioiidioia

Add your own clades here.

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