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bethanythebogwitch · 2 days

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Wet Beast Wednesday: spiny softshell turtle

It may be neither Flat Fuck Friday nor Turtle Tuesday, but because this is my series and I can do what I want, I'm talking about a very flat turtle. The spiny softshell turtle (Apalone spinifera) is the most widely distributed and possibly the most common softshell turtle in North America. Its range covers most of the Eastern half of the USA and stretched into Canada and Mexico. There are 6 subspecies separated by geography and hybridization can happen in places where their ranges cross. Hybridization has also been known to happen with the Florida softshell (Apalone ferox). The subspecies are the northern (A. s. spinifera), gulf coast (A. s. aspera), Texas (A. s. emoryi), pallid (A. s. pallida), Guadalupe (A. s. guadalupensis), and black (A. s. atra) spiny softshells.

(Image: a spiny softshell turtle seen from above and to the side. It is a turtle with a wide, flat shell. Its head and one foot are visible. The head is skinny and has an elongated nose. The foot is wide and flat, with webbed toes. The turtle is an olive green with black dots on the skin, yellow stripes on the face, and dark spots on the shell. End ID)

The thing that makes a softshell a softshell is the lack of keratinized scutes on their shells. This makes the shells smooth and leathery. The center of the shell has a layer of solid bone user it, but this does not extend to the edges of the shell, making it less rigid. Softshells are the fragile speedsters of the turtle world. Their shells are a lot lighter and often more streamlined, allowing for faster movement both on land and in water, but they provide less defense. Spiny softshells have spiny projections along the front edge of the carapace (upper shell), with males having more than females. They are some of the largest North American freshwater turtles. Females can reach a carapace length of 54 cm (21 in) and 11 kg (25 lbs) while the smaller males max out at about 25 cm (10 in).

(Image: a spiny softshell being held by a person, seen from the front. The leading edge of the carapace is visible, showing off the small spines. End ID)

Spiny softshells have wide, flat, paddle-like feet with three claws and an elongated nose that acts like a snorkel. The turtles are born a bright olive color with striped faces and dark spots on the shell. Males keep their juvenile coloration for their entire lives while females grow darker ad lose many of their markings. It can be very difficult to tell females of different subspecies apart, while males and juveniles can be distinguished by their markings. Smooth skin and highly vascularized membranes in the cloaca, mouth, and throat allow the turtles to breathe by diffusing dissolved oxygen from the water into their blood.

(Image: a male and female spiny softshell facing each other. The male is less than half the size of the female and has an olive colored shell and skin, with dark spots on the shell. The female is a uniform muddy brown color. End ID)

Spiny softshells are generalists able to live in a wide range of habitats. They prefer streams, rivers, and ponds with muddy or sandy bottoms and high visibility, but can live in most freshwater habitats. Softshells are diurnal, spending their days basking and feeding. Being turtles, they are ectothermic, meaning their body temperature matches the surrounding temperature. To warm themselves up, the turtles bask in the sunlight. They can often be found resting on exposed rocks, logs, sandbars, or shorelines. While not particularly social animals, the turtles will bask in groups. When threatened, softshells will attempt to swim away and/or bury themselves. In the right sediment, a softshell can bury itself in under a second. Because their shells are less rigid, softshells have to actively defend themselves when cornered and will bite and scratch. People have to be careful when handling them. They brumate (that's hibernation for reptiles) during winter. While brumating, they bury themselves underwater and slow their metabolism and oxygen requirements. In this state they can fully sustain themselves on oxygen absorbed through their skin or special membranes.

(Image: a spiny softshell turtle buried in its hunting strategy. Only the head is visible above the sand. End ID)

They are primarily carnivores and will eat anything that can fit in their mouths. Aquatic insects, crayfish, worms, amphibians, mussels, snails, fish, and more are on their plate. While capable of fast swimming, they are not pursuit predators. They employ two primary hunting strategies. The first is to bury themselves in the sediment and wait for prey to come by. The second is digging in the sediment to find worms and other animals. Fish have been known to follow digging turtles around to feed on animals unearthed by them.

(Image: a spiny softshell in captivity. It is swimming at the surface of the water in a tank, amongst artificial leaves. End ID)

Spiny softshells mate in spring. Males attempt to woo females by swimming over to them and bumping heads together. The male then sits on top of the female to mate. Unlike most species of turtles, the males do not grab onto the female's shells during mating. Eggs are laid between summer and early fall and will hatch next spring. The female will dig a nest in sandy or gravelly banks and bury the eggs once they have been laid. She provides no further care. Females will typically mate multiple times each year, with each mating having a different nest. The juveniles take 8 to 10 years to reach sexual maturity and they can live up to 50 years in the wild. Many turtles determine sex by the temperature the eggs are incubated in. This is not the case with spiny softshells, who have genetics based sex determination.

(Image: a group of 5 juveniles. The photo focuses on two who are sitting next to each other. One has its front right leg on the shell of the other. They have similar coloration to an adult male. End ID)

(Image: a newborn emerging from its egg. The egg is round and white, looking like a ping-pong ball. Only the head of the turtle has emerged. End ID)

Most subspecies of spiny softshell are classified as least concern or near threatened by the IUCN, meaning they are not in danger of extinction. The exception is the black spiny softshell, also known as the Cuatro Ciénegas softshell, which is critically endangered. The primary threats to the turtles is habitat loss due to human activity. Adults have no natural predators outside of the Florida and adjacent state populations, which are prey to alligators. Juveniles are eaten by a variety of animals including fish, snakes, raccoons, and herons. People will also eat the adults. Because it can take a whole decade for juveniles to become reproductive, losses in population take a long time to replace. They have been introduced to areas outside of their native range, most notably the western USA. Most of these introductions are due to people releasing pet turtles into the wild.

(Image: someone holding a juvenile. The shell is 2-3 times the size of the human's thumb. End ID)

#i typoed it as softhsell more times than I care to admit #wet beast wednesday #turtle #turtles #softshell turtle #soft shell turtle #spiny softshell turtle #reptile #biology #zoology #ecology #animal facts #freshwater ecology #aquatic biology #informative #educational #image described #turtle power #herpetology

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turtlevariabilis · 29 days

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Special times when only Donnie and Mikey were like a team.

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cat-cosplay · 4 months

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Catsy Jones

#casey jones #tmnt #teenage mutant ninja turtles #cat cosplay #cosplay #cats #kitty #cats in costumes #cat #cats of tumblr #aww #cat costume #fan art #turtle power

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mysticmiav · 2 months

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I love her your honour

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gleafer · 7 months

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1989

19muthafuggin89

Was when my poor child’s mind was immediately enraptured by these green goofs and their banana-dressed Hey Girl!

It was love, it was contagious and it was everywhere.

And it’s STILL going strong (the new movie was fun)!

Have some turtle power and their besty, April O’ Neil.

#illustrator #illustration #tmnt fanart #tmnt au #tmnt art #tmnt donatello #teenage mutant ninja turtles mutant mayhem #teenage mutant ninja turtles #donatello #tmnt comic #tmnt fan art #turtle power #80s #90s #90s cartoons #80s childhood #hey girl

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alphynix · 18 days

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Jiangxichelys neimongolensis was a terrestrial turtle that was part of an extinct group known as nanhsiungchelyids, whose closest living relatives today are the aquatic softshell turtles.

(This species was previously known as "Zangerlia” neimongolensis, but has since been moved into the genus Jiangxichelys instead.)

It lived towards the end of the Cretaceous, about 75-71 million years ago, in what is now the Gobi Desert – which at the time was more of a semi-arid climate with both rivers and sand dunes.

Its 60cm long (~2') carapace had a long wide shape that made it appear rather flattened from the front, but not to quite as much an extreme as its larger American cousin Basilemys.

Several fairly well-preserved specimens have been found that appear to have been buried alive, probably either engulfed by sudden sandstorms or trapped in collapsing burrows. This has preserved some anatomical details previously unknown in nanhsiungchelyids, such as the pattern of scales on top of the head and the presence of large bony osteoderms on the underside of the front toes, which may have aided with traction on loose sandy ground.

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NixIllustration.com | Tumblr | Patreon

References:

Brinkman, Donald, and Jiang-Hua Peng. "A new species of Zangerlia (Testudines: Nanhsiungchelyidae) from the Upper Cretaceous redbeds at Bayan Mandahu, Inner Mongolia, and the relationships of the genus." Canadian Journal of Earth Sciences 33.4 (1996): 526-540. https://doi.org/10.1139/e96-041

Brinkman, Donald B., et al. "New exceptionally well-preserved specimens of “Zangerlia” neimongolensis from Bayan Mandahu, Inner Mongolia, and their taxonomic significance." Comptes Rendus Palevol 14.6-7 (2015): 577-587. https://doi.org/10.1016/j.crpv.2014.12.005

Jerzykiewicz, T., et al. "Djadokhta Formation correlative strata in Chinese Inner Mongolia: an overview of the stratigraphy, sedimentary geology, and paleontology and comparisons with the type locality in the pre-Altai Gobi." Canadian Journal of Earth Sciences 30.10 (1993): 2180-2195. https://doi.org/10.1139/e93-190

Tong, Haiyan, and Lu Li. "A revision of the holotype of Nanhsiungchelys wuchingensis, Ye, 1966 (Testudines: Cryptodira: Trionychoidae: Nanhsiungchelyidae)." Cretaceous Research 95 (2019): 151-163. https://doi.org/10.1016/j.cretres.2018.11.003

Tong, Haiyan, et al. "New material of Jiangxichelys ganzhouensis Tong & Mo, 2010 (Testudines: Cryptodira: Nanhsiungchelyidae) and its phylogenetic and palaeogeographical implications." Geological Magazine 154.3 (2017): 456-464. https://doi.org/10.1017/S0016756816000108

Wikipedia contributors. “Nanhsiungchelyidae.” Wikipedia, 19 Nov. 2023, https://en.wikipedia.org/wiki/Nanhsiungchelyidae

#science illustration #paleontology #paleoart #palaeoblr #jiangxichelys #zangerlia #nanhsiungchelyidae #cryptodira #turtle #testudines #pantestudines #reptile #art #ancient mutant fossil turtles #turtle power

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mmoofykins · 1 year

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EPIC RAP BATTLES OF HISTORY

VS

Because my friend asked me to make this about rise Mikey and Donnie and I let them get a little bit of help from their other selves 🤼‍♂️🤼‍♂️🐢🐢🐢✨

Them hanging out afterwards

This also took way longer to make than it should have but

I think I've never produced anything greater than this face

Most fun part about making this drawing, easily

#teenage mutant ninja turtles #you know when you #request help from your parallel universe counterparts #to fight your brother?#tmnt fanart #tmnt #tmnt 2012 #rottmmt #tmnt mutant mayhem #tmnt 1987 #turtle power #Turtles #art #rise of the teenage mutant ninja turtles #tmnt fandom #adhd vs autism #epic rap battles of history

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audhd-nightwing · 2 years

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i feel like people need to see the actual turtles that the rottmnt were based on so here

donnie - spiny softshell turtle

raph - alligator snapping turtle

mikey - ornate box turtle

leo - red eared slider

#rottmnt movie #rottmnt #leo rottmnt #rottmnt donnie #mikey rottmnt #raph rottmnt #leonardo #donatello #michael angelo #raphael #rise of the teenage mutant ninja turtles #turtle power #turtles

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d1rtzilla · 1 month

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Heroes in a half shell!

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t-annuki · 1 year

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The Purple Sniper

inspired by @donathan but bayverse Donnie uwu

#tactical turtles for more

commissions are open

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cherrybxmber · 17 days

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I been busy while I was gone!! Made a new tmnt au called Turtle Power where the turtles have.. Well powers!! It’s still in the works but I’ve brainstormed a bunch for it