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A recent study suggests that insects branched out from crustaceans
- willis936 1y agoI suspect crustacean allergies are actually arthropod allergies. I haven't seen much research on this though.
- echelon 1y agoIt's an allergic reaction to tropomyosin, which is found in shellfish and cockroaches. I recall an anecdote of an entomologist who studied cockroaches in particular claiming to have developed a shellfish allergy from her work. https://en.wikipedia.org/wiki/Tropomyosin https://en.wikipedia.org/wiki/Tropomyosin
- saghm 1y agoIf this were a sci-fi movie, it would be because the cockroaches were sentient and trying to protect themselves.
- xipho 1y agoI suspect arthropods are way too diverse to fall under a single umbrella of "is_allergic". Millions of years of evolution can produce very radically different things for our bodies to worry about. Just the fact that there are no marine insects (completing their lifecycle within an ocean) tells us something about how different their biologies, and therefor allergenic "surface" are. Poison pathways from venom can target completely different systems in a humans.
- andrewflnr 1y agoAlmost no marine insects. https://en.wikipedia.org/wiki/Halobates https://en.wikipedia.org/wiki/Halobates Re lifecycle: > The coastal species lay their eggs close to the water surface on rocks, plants, and other structures near the shore, while the oceanic species attach their egg masses on floating objects such as cuttlebone and feathers.
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- xipho 1y agoI know of Halobates, they live on top the ocean, not in the ocean. I.e. they have no adaptations to breathe in salt water. There are many other species like this that are restricted to tidal (flies, parasitic wasps, etc.) or costal areas and nowhere else, but again, not under water.
- andrewflnr 1y agoEven their nymphs?
- xipho 1y agoRight, they are not underwater. Hemimetaboulous insects like Holobates look like baby adults when they are born, and undergo multiple "partial" metamorphosis. In this case their wings are almost non-existent. They will go through multiple molts, gradually looking more like the adult. Holometabolous insects (e.g. beetles, wasps, butterflies, flies) are the ones with radically different body plans, often exploiting different niches, the larva could be aquatic, the pupa and adult terrestrial. Some more "basal" insects (dragonflies, mayflies) also have different body-plans at different stages, though instead of "larva" we say "imago", and things like that, for those lineages.
- willis936 1y agoOkay but they both have exoskeletons that have many shared proteins. Allergies are just a protein check.
- senkora 1y agoPeople with shellfish allergies are generally advised to avoid eating crickets for this reason.
- ljsprague 1y agoThere is a tree-dwelling shrimp. https://www.metafilter.com/201489/A-shrimp-that-dwells-in-trees https://www.metafilter.com/201489/A-shrimp-that-dwells-in-tr...
- SideburnsOfDoom 1y agoThere seem to be a lot of semi-terrestrial shrimp. The article mentions "beach-hoppers" or "sandhoppers", which are this long list: https://en.wikipedia.org/wiki/Talitridae https://en.wikipedia.org/wiki/Talitridae
- AIPedant 1y agoWoodlice - e.g pillbugs / roly-polies - aren't shrimp, but they are crustaceans, probably evolving from something like a trilobite.
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- dboreham 1y agoMakes sense: a coastal cave is a great environment where an organism can experiment with moving from water to land. This article also nicely highlights how some scientists can just make stuff up, subsequently overturned when someone finds a fact-based way to evaluate their erroneous conclusions. See also archeology.
- Imnimo 1y agoI'm so used to seeing the "fish crawling onto the shore" cartoon of evolution that I assumed the branching always went that way - land creatures are branchoffs of sea creatures. But surely this is oversimplified - are there examples in the other direction, where a branching occured in land animals and one branch then returned to the sea?
- MisterBastahrd 1y agoMarine mammals.
- showerst 1y agoI think all marine mammals fit this, right?
- Calavar 1y agoYes. And for a non animal example, there's sea grass, which evolved from land grasses.
- SideburnsOfDoom 1y agoAnd for an animal but non-mammal example, there are penguins.
- addaon 1y agoSea snakes, as well.
- riffraff 1y agoAnd sea turtles, and I guess iguanas are a kind of sea lizard.
- SideburnsOfDoom 1y ago> iguanas are a kind of sea lizard Only the marine iguanas, but yes. Also salt-water crocodiles (the largest living reptile).
- dang 1y ago[stub for offtopicness]
- carabiner 1y ago[flagged]
- throwaway-blaze 1y agoPlease point us at the land-bugs with a taste profile like shrimp / lobster / crab / other edible crustaceans enjoyed by humans.
- anigbrowl 1y agoI'm surprised to learn anyone thought otherwise.
- pfdietz 1y agoThe previous theory, it seems to me, is that crustaceans and insects were separate -- that is, they shared a common ancestor, but each is a clade. The new idea is that insects are slotted inside the larger tree of crustaceans, and are more related to some crustaceans than to others.
- abeindoria 1y agoI strongly suggest reading Neil Shubin's "Your Inner Fish" which explains a bit more on how different bits etc evolved if you're interested in the topic.
- fallat 1y agoThis seems so obvious
- CommenterPerson 1y agoBiology was always a mystery in college, but I have also felt that this was obvious. They look very similar for heaven's sake! My paranoid self thinks shrimp, crabs and lobsters are labeled differently from bugs, so people can eat them without being repulsed.
- andrewflnr 1y agoCompared to the alternative that, IIRC, insects are closer to myriapods? Crustaceans aren't the only crunchy animals, even after this reorganization.
- nmstoker 1y agoFor a fairly science focused article I was a little surprised they referred to "bugs" in the casual / technically incorrect manner, as covered here: https://en.m.wikipedia.org/wiki/Insect#Distinguishing_features https://en.m.wikipedia.org/wiki/Insect#Distinguishing_featur...
- nescioquid 1y agoAs a lay-person who likes to read about bugs, I've come to expect the qualifier "true" to connote something special about bug's "mouth parts".
- dhosek 1y ago“Bats: Bug Scourge of the Skies!“
- epicureanideal 1y agoIs this part of an "eat bugs" marketing push? "Bugs are just miniature lobsters". If anything, makes me not want to eat crustaceans.
- upghost 1y agowhoa whoa whoa I was told everything evolves into crabs[1]: [1]: https://xkcd.com/2314/ https://xkcd.com/2314/
- adrian_b 1y agoThe title should mention the 2023 year, as reference for "recent". As explained in the article, this is actually old news. There has been more than a decade since it is well known that the hexapods a.k.a. insects have evolved from within a certain group of crustaceans, which includes the water fleas. The 2023 research paper linked in the article has only provided stronger evidence for this. The main implication of this discovery is that the myriapods (e.g. millipedes and centipedes) are much more remotely related to insects than it has been believed in the past and they have adapted to a terrestrial life completely independently and much earlier than the insects (the invasion of the land by major animal groups has happened in the order myriapods, then arachnids, then hexapods a.k.a. insects, then tetrapod vertebrates, by a coincidence in decreasing order of the number of legs).
- deleted 1y ago[deleted]