Отправлено: 18.05.22 16:06. Заголовок: Fauna of North America

I decided to open a topic for this continent, since it was the only one that remained without one in the foreign section.
I was thinking about the possibility of the snakehead fish and the peacock bass, both introduced species in the USA, surviving in the Neocene. Does it seems plausible? Another animal that could live here is a descendant of the house sparrow. It was also introduced here.

 Отправлено: 03.04.23 13:56. Заголовок: JOrnitho пишет: who..

JOrnitho пишет:

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who would be more opportunist

May be peccary?

 Отправлено: 04.04.23 03:22. Заголовок: wovoka пишет: May b..

wovoka пишет:

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May be peccary?

Yes. The Ao ao would be an opportunist, eating some vegetable, but also being an incredible scavenger. It could have strong jaws that could break nuts, but have the same effect with bones.
By the way, in your chapter about sea bats, do you think that would be posssible for a Leedsichthys-like fish to appear on it, perhaps as part of its migration? I don't know if the Neocene already had large oceanic filter-feeders.

 Отправлено: 04.04.23 08:01. Заголовок: JOrnitho Russian us..

JOrnitho
Russian user Nick suggested "dreadnought fish" - giand filterfeeding pomfret descedent, but it is not accepred yet. It also was migratory.
We already have only two giant filterfeeders (whale salpa and planktonobasileus), but they're invetebrates - urochordate and jelleyfish. They live in subantarctic seas.

 Отправлено: 04.04.23 11:53. Заголовок: лягушка пишет: Russ..

лягушка пишет:

цитата:

Russian user Nick suggested "dreadnought fish" - giand filterfeeding pomfret descedent, but it is not accepred yet. It also was migratory.

Does it have a global distribution? Can you give me the link?

 Отправлено: 04.04.23 12:45. Заголовок: JOrnitho Click here..

JOrnitho
Click here for this fish. It lives only in Atlantic and Pacific, not globally.
In Russian part of forum, we suggestad a chapter about this fish and its parasites and commencials - "На борту дредноута".

 Отправлено: 06.04.23 03:21. Заголовок: лягушка пишет: Russ..

лягушка пишет:

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Russian user Nick suggested "dreadnought fish" - giand filterfeeding pomfret descedent, but it is not accepred yet. It also was migratory.

Would be possible to have a giant fish with a similar diet to that of a Humpback whale? These whales are generalist feeders, their main food items being krill, but they can also eat small schooling fish. This fish would eat the Neocene analogue to the krill (if they went extinct0, the small fish and perhaps small squids.

 Отправлено: 04.04.23 09:36. Заголовок: will describe lanter..

will describe lanternfish-squid this week, i theik it'll be fast.

 Отправлено: 04.04.23 13:51. Заголовок: лягушка пишет: wil..

лягушка пишет:

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will describe lanternfish-squid this week, i theik it'll be fast.

They would. What do you think if the males are brighter than females? Or perhaps both sexes shiny in a different way? I thought that would be nice if they had some degree of sexual dimorphism, like true fireflies.

 Отправлено: 16.07.23 21:54. Заголовок: I finished the descr..

I finished the description of the microwolf. It's large rival will be the next.

Howling microwolf (Lupinomys ululatus)
Order: Rodentia
Family: Cricetidae
Habitat: Lowland wet habitats with subtropical climates, commonly observed in grassy clearings and forested areas of the Panama Peninsula
The transition of the Holocene to the Neocene gave opportunities for species to evolve into new forms, some due to the speciation of its old habits. One of these cases was the howling microwolf, a descendant of the Alston's brown mouse (Scotinomys teguina) that expanded its ancestors' repertoire of vocalizations with more complex sounds. Endemic to the lowland tropical forests of the Panama Peninsula, the howling microwolf is a pack hunter, forming groups of twenty or more closely related individuals.
The howling microwolf is a small rodent, with a body length of 7-10 cm and a tail length of 5-10 cm. Its underparts are dark gray-brown with reddish cinnamon strands coming from their head through the dorsal medium line to the base of the tail. The tail is blackish and lightly haired and its feet are black. The ears are small and rounded. As an adaptation to their predatory habits, the howling microwolf have sharp incisive teeth, modified to fill the role of canines. Their molars also have sharp cusps, allowing them to cut the meat of their prey.
They are predominantly insectivorous, feeding on beetles and other insects. However, given the size of their packs, howling microwolves can hunt other animals through cooperation. Birds, lizards, rodents and marsupials can be hunted, with the groups being capable of bringing down animals larger than themselves.
The howling microwolf are crepuscular and nocturnal. They live in large packs of twenty to forty close related individuals that share the same den. This species usually hunt separated or in pairs, but when a large prey is located they vocalize to call other members of the group. They produce vocalizations which are characterized by singing bouts containing both sonic and ultrasonic elements. However, the most common sound is a howl. Once a large group is formed, they'll attack the prey with constant bites. Due to its large number, they can bring down animals larger than themselves.
Female howling microwolf have an estrous cycle about four to six days long, with estrus itself lasting less than a day. If several females are held together under crowded conditions, they will often not have an estrus at all. If they are then exposed to male urine, they will come into estrus after 72 hours. Sexual maturity is reached within 32 days and they have a lifespan of 2 years.

 Отправлено: 16.07.23 22:24. Заголовок: JOrnitho Good creat..

JOrnitho
Good creature! I've also tried to describe carnivorous hamster, but evolved from scorpion hamster, not scotynomys.

 Отправлено: 17.07.23 03:58. Заголовок: лягушка пишет: Good..

лягушка пишет:

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Good creature! I've also tried to describe carnivorous hamster, but evolved from scorpion hamster, not scotynomys.

This an interesting idea. Did you finish the description?

 Отправлено: 17.07.23 07:59. Заголовок: JOrnitho Did you fi..

JOrnitho

цитата:

Did you finish the description?

No i haven't. I described appearance and dental anatomy of this animal, but not it's life.

 Отправлено: 17.07.23 10:13. Заголовок: Interesting animal!..

Interesting animal!

 Отправлено: 17.07.23 14:07. Заголовок: JOrnitho пишет: How..

JOrnitho пишет:

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Howling microwolf

Very good description!
I think it will be very interesting chapter.

JOrnitho пишет:

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It's large rival will be the next.

I'll be waiting for it.

 Отправлено: 17.07.23 14:20. Заголовок: лягушка пишет: No i..

лягушка пишет:

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No i haven't. I described appearance and dental anatomy of this animal, but not it's life.

I can help, if you need.

 Отправлено: 17.07.23 14:31. Заголовок: JOrnitho пишет: I c..

JOrnitho пишет:

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I can help, if you need.

The description is here https://sivatherium.borda.ru/?1-0-1689593167322-00000180-000-10001-0#068
I think Лягушка wouldn't mind if you give some interesting ideas for description.

 Отправлено: 17.07.23 14:53. Заголовок: Also, I was reading ..

Also, I was reading about introduced species and noticed that some antelopes were introduced in the USA (Antilope cervicapra, Boselaphus tragocamelus, Oryx gazella). So I thought if any of them could survive.
From those, I think that Antilope cervicapra and Oryx gazella have the highest chances. Both have stable populations and the A. cervicapra even have a large population. If they survive, I think that they would be endemic to grasslands and arid regions of Texas, Mexico and New Mexico. I support the Oryx here only so it could be the last representative of its genus, living far away from their homeland (I love oryxes ).
Another place where A. cervicapra could survive is Argentina. This animal was introduced here and is also thriving in the country.

 Отправлено: 17.07.23 18:21. Заголовок: JOrnitho пишет: I t..

JOrnitho пишет:

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I think that they would be endemic to grasslands and arid regions of Texas, Mexico and New Mexico

They can get niche of Antilocapridae.

Or became very big as pleistocene bison latifrons Скрытый текст

or even have more big hornes like pelorovis antiquus Скрытый текст

and form of body like magaloceros giganteus Скрытый текст


JOrnitho пишет:

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Another place where A. cervicapra could survive is Argentina. This animal was introduced here and is also thriving in the country.

They can get niche of Ozotoceros bezoarticus but we should ecologically divided them into different ecological niches with deer maras. Perhaps the antelope will feed on thorny or poisonous bushes.

 Отправлено: 17.07.23 20:26. Заголовок: wovoka пишет: They ..

wovoka пишет:

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They can get niche of Antilocapridae. Or became very big as pleistocene bison latifrons Скрытый текст or even have more big hornes like pelorovis antiquus Скрытый текст and form of body like magaloceros giganteus Скрытый текст

What do you think if they remain in their ancestor's size, but develop a rump with the same function of the camel? It would help them survive in deserts. They could even live in the Death Valley because of it.

wovoka пишет:

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They can get niche of Ozotoceros bezoarticus but we should ecologically divided them into different ecological niches with deer maras. Perhaps the antelope will feed on thorny or poisonous bushes.

Or they can become a tall animal, capable of eating leaves in the trees, like a giraffa, but in the pampas.
Another possibility is they evolving into gerenuk-like animals that are capable of feeding in tree branches by standing in their hindlimbs. Besides that, these antelopes could also develop lips and tongue that allow it to feed in thorny plants.

 Отправлено: 17.07.23 20:59. Заголовок: Both ideas are cool...

Both ideas are cool.