Anisomorpha - Wiems

anisomorpha - Wiems

More Posts from Anisomorpha and Others

1 year ago

I am once again thinking about digging holes

I Am Once Again Thinking About Digging Holes

It's so fucked up that digging a bunch of holes works so well at reversing desertification

I Am Once Again Thinking About Digging Holes

I hate that so much discourse into fighting climate change is talking about bioenginerring a special kind of seaweed that removes microplastics or whatever other venture-capital-viable startup idea when we have known for forever about shit like digging crescent shaped holes to catch rainwater and turning barren land hospitable


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9 months ago

Why are rain frogs so round? What's /inside/ of them around such an itty bitty skeleton?

So it turns out this is a really interesting question.

The first thing we must be aware of is that rainfrogs as we see them in videos of them squeaking are not quite the same shape as they are when at rest:

image

[x]

But you are quite right, they are very round. This is exemplified by the skeletal photo you refer to:

image

[X]

So what are we seeing?

Well, firstly, note that the body cavity in these frogs actually envelops the femurs, such that only the tibiofibula (fused in frogs) and the tarsals and metatarsals are outside the body. The arms are quite similarly enveloped, but a bit of the humerus does extend outside the body cavity too. This predisposes them to a rounder body shape.

Next, note the ilia - the U-shaped bone in the pelvic region. These in some breviceptid frogs are synostotically fused with the sacrum - that is to say, they are bound by bone-based connections to the bow-shaped vertebra at their tips. This whole joint seems to be quite smooth, and as a consequence, the back of the frog is quite smooth. The other thing we can see here is that the urostyle (i.e. the frog version of a coccyx) juts quite far beyond the ischium and pubis. This extends the body cavity beyond the hips. Note also that the pelvic girdle seems to be largely below the spine, rather than the typical position for frogs behind it and continuous with it. This makes the legs sit below the spine, rather than at its end, enhnacing the vertical roundness of the animal.

Next, let’s talk some soft tissue. Now, I’m not as familiar with soft-tissue in frogs as I am their skeletons, so you’ll have to bear with me a bit (rawr). Beddard (1908!!) studied the soft tissue of Breviceps verrucosus Rapp 1842. It seems that the majority of the body of these frogs is actually muscle. Beddard noted that muscles join the leg at the knee that extend into the body cavity, such that the inclusion of the thigh in the body cavity is further accentuated by musculature. The rectus abdominalis muscle is unusually large, extending from the lower abdomen up and around the sides of the body. Indeed, this large size appears to be the pattern with all of the major muscles, though in the throat the typical arrangement of large and small muscles is somewhat reversed. On the lateral side of the head, there is a substance that is not muscle, but appears to be loose tissue in which sits what is apparently the thymus gland.

There is a very large gap between the end of the urostyle and the anus (one fifth of the total length of the frog), in which there are almost no muscles, save for the one surrounding the lower cloaca. On either side of this area, between the posterior-most muscles of the thigh, lie two large ‘lymph-hearts’, as described by Beddard. These are between one quarter and one third of the total length of the frog. A further lypmh-sac sits between these lymph-hearts and the skin of the femoral region, and they are thus probably analogous to the femoral lymph-sacs of other frogs.

I find it interesting that Beddard (1908) did not mention any glandular formations in the dorsal region. As is evidence from many images (see below), these frogs are able to secrete a white, sticky, noxious substance from their skin (which they actually have to use during amplexus, as the male is too small relative to the female to mount her properly, and so he sticks himself to her with his glandular glue… kinky).

image

[x]

These glands do not apparently take up a great deal of the cutaneous tissue, and so I suppose are of no consequence to the size of the frog, especially relative to its enormous muscles.

The diet of these frogs consists almost exclusively of hymenopterans and isopterans (ants and termites). Neither of these insect groups are particularly fatty, so it is little surprise that their bodies appear to contain no large fat deposits - fatty bodies extend from the gonads up to the lungs and heart, but these comprise only a tiny fraction of the frog’s mass, and don’t contribute to the round shape. Instead, their bodies are extremely muscular, allowing them to be adept burrowers, ideal for their fossorial lifestyle.

So TL;DR: rain frogs are little balls of muscle (maybe the largest muscle mass relative to body mass of any vertebrate? science just doesn’t know).

Why Are Rain Frogs So Round? What's /inside/ Of Them Around Such An Itty Bitty Skeleton?

Ref:

Beddard, F.E. 1908. On the Musculature and other Points in the Anatomy of the Engystomatid Frog, Breviceps verrucosus. Proceedings of the Zoological Society of London, 1908:11-41 [x]

11 months ago

because sometimes there are invisible tests and invisible rules and you're just supposed to ... know the rule. someone you thought of as a friend asks you for book recommendations, so you give her a list of like 30 books, each with a brief blurb and why you like it. later, you find out she screenshotted the list and send it out to a group chat with the note: what an absolute freak can you believe this. you saw the responses: emojis where people are rolling over laughing. too much and obsessive and actually kind of creepy in the comments. you thought you'd been doing the right thing. she'd asked, right? an invisible rule: this is what happens when you get too excited.

you aren't supposed to laugh at your own jokes, so you don't, but then you're too serious. you're not supposed to be too loud, but then people say you're too quiet. you aren't supposed to get passionate about things, but then you're shy, boring. you aren't supposed to talk too much, but then people are mad when you're not good at replying.

you fold yourself into a prettier paper crane. since you never know what is "selfish" and what is "charity," you give yourself over, fully. you'd rather be empty and over-generous - you'd rather eat your own boundaries than have even one person believe that you're mean. since you don't know what the thing is that will make them hate you, you simply scrub yourself clean of any form of roughness. if you are perfect and smiling and funny, they can love you. if you are always there for them and never admit what's happening and never mention your past and never make them uncomfortable - you can make up for it. you can earn it.

don't fuck up. they're all testing you, always. they're tolerating you. whatever secret club happened, over a summer somewhere - during some activity you didn't get to attend - everyone else just... figured it out. like they got some kind of award or examination that allowed them to know how-to-be-normal. how to fit. and for the rest of your life, you've been playing catch-up. you've been trying to prove that - haha! you get it! that the joke they're telling, the people they are, the manual they got- yeah, you've totally read it.

if you can just divide yourself in two - the lovable one, and the one that is you - you can do this. you can walk the line. they can laugh and accept you. if you are always-balanced, never burdensome, a delight to have in class, champagne and glittering and never gawky or florescent or god-forbid cringe: you can get away with it.

you stare at your therapist, whom you can make jokes with, and who laughs at your jokes, because you are so fucking good at people-pleasing. you smile at her, and she asks you how you're doing, and you automatically say i'm good, thanks, how are you? while the answer swims somewhere in your little lizard brain:

how long have you been doing this now? mastering the art of your body and mind like you're piloting a puppet. has it worked? what do you mean that all you feel is... just exhausted. pick yourself up, the tightrope has no net. after all, you're cheating, somehow, but nobody seems to know you actually flunked the test. it's working!

aren't you happy yet?

1 year ago

im miserable in a cool fun sexy way u wouldn’t get it

1 year ago

my predominant method of locomotion is creeping but I’ve also been known to skitter on occasion

1 month ago

Lady on Facebook: do hawks really avoid black chickens?

This guy:

Lady On Facebook: Do Hawks Really Avoid Black Chickens?

I can't breathe what the fuck 😂

1 year ago
Every Year We Have To Say It
Every Year We Have To Say It

every year we have to say it

7 months ago

weather loach is banished from nature

Weather Loach Is Banished From Nature

gods kingdom rejects the weather loach

10 months ago
Haha Oh My God, I Love This Fuckin Guy. There He Goes…leaving All The Bull Shit Behimd Him.

haha oh my god, I love this fuckin guy. there he goes…leaving all the bull shit behimd him.

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anisomorpha - Wiems
Wiems

Art blog @morganwiemerart | she/her, 23 | Reblog interesting creatures and personal stuff here

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