Epibiosis - An interesting ecological association as it might have looked 508 millions years ago: a cluster of Micromitra burgessensis, a species of early brachiopod and without doubt one of the prettiest organisms of the Cambrian, attached to the enigmatic tube-building animal Tubulella sp., a possible cnidarian.
In the Burgess Shale, almost a third of M. burgessensis individuals are preserved attached to another organism - often the spiny sponge Pirania, but they weren't too picky, settling on many different biogenic substrates (such as the tube here), and even other individuals of their own species! The strong tendency of Micromitra (and several other brachiopods species) in this deposit to colonize living organisms is most likely due to the rarity of other hard substrates like rocks, and a predominantly soft, soupy seafloor that did not provide suitable attachment points (Topper et al. 2015a).
Speculative hydroid-like polyps are also depicted on the tube, inspired by modern tube worms covered in hydroids that I saw while looking for reference pictures. Despite the exceptional range of soft bodied fossils collected in the Burgess Shale, no cnidarian soft tissues are known from this deposit, as the conditions required for their preservation appear different to those for other animals (Hancy & Antcliffe 2020): one wonders how many soft-bodied epibionts have disappeared without leaving a single trace in the fossil record, despite affecting the life of their hosts and possibly even competing with other, more fossil-friendly epibionts like brachiopods.
(Reconstruction of fossil specimen ROM63170 as figured in Topper et al. 2015b. Additional reconstruction information based on Topper et al. 2015a, 2015b. Maximum shell width of the center brachiopod is approx. 5 mm.)
References:
Hancy, A. D., & Antcliffe, J. B. (2020). Anoxia can increase the rate of decay for cnidarian tissue: Using Actinia equina to understand the early fossil record. Geobiology, 18(2), 167–184. https://doi.org/10.1111/gbi.12370
Topper, T. P., Strotz, L. C., Holmer, L. E., & Caron, J.-B. (2015). Survival on a soft seafloor: Life strategies of brachiopods from the Cambrian Burgess Shale. Earth-Science Reviews, 151, 266–287. https://doi.org/10.1016/j.earscirev.2015.10.015
Topper, T. P., Strotz, L. C., Holmer, L. E., Zhang, Z., Tait, N. N., & Caron, J.-B. (2015). Competition and mimicry: The curious case of chaetae in brachiopods from the middle Cambrian Burgess Shale. BMC Evolutionary Biology, 15(1), 42. https://doi.org/10.1186/s12862-015-0314-4
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Curiosity is what it looks like when you’re in love with the world
Mira Grant, Symbiont
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North! It’s North... he’s my second most boring white man from Freelancer, but he gets extra points over York for me by being overprotective in an interesting way and being a corpse in his first appearance. Let’s go useless king!!
But for real here’s some info about this spotty guy:
- Since North, as mentioned, is dead before the main RvB plotline even begins, I decided to make his “main” drawing of this piece his Pre-Freelancer design. So no scars, or anything, and fancy civilian clothes. Being the 14th host of his symbiont, he’s got at least 600 years of life experience, so just by virtue of being Kalan he’s very well respected. So he’s a fancy little dresser, including me giving him heels. Well, I was tired of drawing boots.
- I expand more on why this version of North joined PFL in my fic, but he really does become an oddity among the other Freelancers. As a joined Trill with a very old symbiont he’s super skilled, smart, and wise in a way. But critically he’s insecure about that, and probably holds back to try and “blend in” more. I like North better if he’s sort of a charming cool-guy who hides a ruthless and kind of condescending inner self.
- North has the least Borg tech of any of the Freelancers. I’m not sure if this draws on anything in canon, but I imagine that joined Trills are particularly sensitive to bodily modifications, with the symbiont being potentially at risk.
- All of the fragments except for Omega are still actual AI in this AU (see Doc for more info), but they’re necessarily a little different than RvB AIs. They’re simpler, small computer programs that help the Freelancers run their Borg mods, and they’re equipped with mini holo-emitters so they can easily communicate with others. They all look oddly similar to the Director... hmmmm, what a mystery.
Next week is Meta and that’s the last of the Freelancers!
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How do Trkll Guardians get their telepathic abilities?
And how will that work for a synth like Gray?
Does Tal still retain any of Gray's memories, or is synth-Gray literally the sum of said memories removed from Tal?
How has Tal's personality affected Adira's, aside from giving them super-smarts?
Why haven't we seen Counselor Culber advise Gray on how to handle returning from the dead?
What happened to Gray and Adira's biological families? (Was this mentioned onscreen and I just missed it?)
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A gorgeous assemblage of mosses and lichens;
including Cladonia chlorophaea (correct me if I'm wrong)
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I’ve rewatched “The Host” (Star Trek: The Next Generation, season 4, episode 23). It’s a trill episode. Of course, they changed their appearance after that and removed that weird thing when he interacts with the symbiont almost directly through his own stomach, but still – these are trills and I’m happy to see them because they look like a promise of Jadzia. A Trill ambassador comes on Enterprise to hold negotiations with some alien race, we don’t need to know anything about them, only that our Trill friend is a key figure in the negotiations and nobody else would be able to deal with diplomacy work as perfect as he. He also has a romance with Doctor Crusher. A pretty heated one. (Spoilers!) But then, the host gets damaged and to save the symbiont Riker decides to volunteer and becomes a host. I have to admit, despite all dramatism of the situation, seeing Doctor Crusher making out with Riker still felt odd. At the end negotiations are successful and an actual host arrives, but what an unfortunate – it’s a woman. The operation is successful, but the doctor doesn’t feel that comfortable about her romance anymore. Also, of course, everything is Star Trek is so cis-hetero, of course, it has never been different, never-never. (wink-wink)
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