#amphioxus

[bethanythebogwitch]

The modern world is nice, but sometimes you just get the urge to go primitive. Because I'm a complete wimp who would die within a day of giving up the internet, I'm going to deal with that urge by talking about primitive animals. It's Wet Beast Wednesday and I'm talking about lancelets.

(image: a lancelet. Not much to look at, are they?)

Lancelets, or amphioxi, are highly basal (close to the ancestral form) chordates that are vaguely similar to fish, but are vastly more primitive. They have all the characteristics of chordates, the key one being a notochord, a flexible rodlike structure that goes down the body. The majority of chordates that are still alive are vertebrates, who have incorporated the notochord into the spinal column. The other groups of surviving chordates are the tunicates (who I'll get to eventually) and the lancelets. Because lancelets are so primitive, they are used at model organisms representing an early stage of vertebrate evolution. It was originally thought that lancelets are remnants of an early lineage that eventually evolved into vertebrates. Genetic studies later showed that tunicates are actually more closely related to modern vertebrates than lancelets. They are still used as a model organism as they are a fantastic representation of early chordates. The similarity of lancelets to the 530 million year old Pikaia gracilens, one of the earliest known chordates, is one of the reasons they are such a useful model organism.

(image: a diagram of lancelet anatomy by Wikipedia user Systematicist)

Lancelets can be found all over the world, living in temperate to tropical shallow seas. The only known exception is Asymmetron inferum, which has been found around whale falls at 225 m (738 ft) deep. They are small animals, reaching around 8 cm at their largest. An amphioxus looks pretty worm-like, with a simple mouth at one end and a pointed tail at the other. The name amphioxus means "both (ends) pointed" which is a pretty appropriate description. The mouth is lined with tentacle-like threads called oral cilli, which are used for feeding. Lancelets are filter-feeders that use the cirri to filter plankton, microbes, and organic detritus. Water and food pass into the pharynx (back of the mouth), which is line with gill slits. This is where it gets weird. The gill slits aren't used for respiration, but for feeding. Mucus gets pushed through the gill slits by cilia, trapping the food and moving it deeper into the digestive tract. Not only to lancelets not use their gill slits to respirate, they actually don't have a respiratory system at all. Instead, they just absorb dissolved oxygen through their thin and simple layer of skin. Their circulatory system doesn't move oxygen around either as there is no heart or hemoglobin present. For what it's worth, they don't have a proper live either. When you look at a lancelet's anatomy, you can see similarities to fish anatomy, just much more primitive and with some parts missing.

(image: the head of a lancelet, with mouth and cilli visible)

Lancelets have 4 different systems used for vision. Two, the Joseph cells and Hesse organs, are simple photoreceptors that are on the notochord and detect light along the back of the animal. Imagine having a bunch of very simple yes on your spinal cord that can see through your skin. There is also a simple photoreceptor called the lamellar body (which confusingly is also the name of a type of lipid) and a single simple eye on the head. Speaking of light, lancelets are florescent, producing green light when exposed to blue to ultraviolet light. In all species, the proteins responsible for this are found around the cilii and eye, but some species also have them in the gonads and tail. The purpose for this florescence isn't exactly known, but a common hypothesis is that it helps attract plankton toward their mouths.

(image: an extreme close-up of a lancelet's cilli fluorescing)

Lancelets have seasonal reproduction cycles that occur in summer. Females release their eggs first, followed my males releasing sperm to fertilize them. Depending on species, spawning can either occur at specific times, or gradually throughout breeding season. Development occurs in several stages. In the frist stage, they live in the substrate, but they will quickly move into the water column to become swimmers. These swimming larvae practice diel vertical migration, traveling to the surface at night and returning to the seafloor in the day. While larvae can swim, they are still subject to the current and can be carried long distances. Adults retain their ability to swim, which is done by wriggling like an eel and in some cases, spinning around in a spiral fashion while moving forward. Unlike the larvae, adults spend most of their time buried in the substrate with only their heads exposed. They typically only emerge when mating or if disturbed.

(image: a diagram of the lancelet life cycle. source)

Because of their use as model organisms, humans have developed methods to keep and breed lancelets in captivity. The majority of research has been done on Branchiostoma lanceolatum, but several other species have been studied. Multiple species are endangered due to pollution and global warming. Several species are edible and can either be eaten whole or used as a food additive. In spring, when their gonads begin to develop for breeding season, they develop a bad flavor.

Mom: "we have garden eels at home". Garden eels at home:

(image: three lancelets sticking their heads out of the sediment)

#wet beast wednesday #weird-ass tube beast #lancelet #amphioxus #chordate #chordata #marine biology #biology #ecology #zoology #animal facts #evolutionary biology

[ndostairlyrium]

I was tagged by @vakarians-babe (hi O:) & @greypetrel 💛✨ thank you so much!!!

I'm working on um, different things I can't show here (or yet lol), so I'll just present you with the things I'm carrying forward at the moment, among the moltitude of wips I'll finish after the armageddon, probably :'D

Hopefully I'll finish Ankhie's outfits before the next artfight ;; send help

So! Here we have:

A back! Which I'm trying to render correctly (along with the rest). I was looking through my old notes of Anatomia Artistica 2, but everything looked very off because that sketchbook has um, almost 15 years of existence lol so I had to make new studies from scratch. tl;dr: it's taking me a while. From the skintone alone, you know who the subject is :' also it's the base I'm using for her new outfits so you already saw the front

A stranger! O: you'll get a small post before the weekend 👀

Two familiar idiots <3 I'm trying to finalize it but I went for another approach on some sections and I think at this point this picture can be used under the definition of self-sabotage hahah <3

Cassandra being all cute and fancy <33 I'm not super sure on that palette, maybe I'll ditch the greens (argh)

I'm tagging (no pressure, no obligation <3): @daggerbean @shivunin @underneathestars @alienturnipp @magspy & @herearedragons

#wip wednesday #but it's a thursday! #hopefully tags work?? #that illustration is my inner saboteur #listen at least it's a cullavellan pic and not a voice in my head called roger #I need anons sending me reminders like #'how's roger' referring to that specific pic because I'm dragging it around since the beginning of the paleozoic era #like you know #amphioxus #dinosaurs people always forget about amphioxus

[eclipseandbone]

Don't get the Amphioxus they said. It's a difficult and finicky plant they said. This guy can't stop won't stop. And my place sits at around 30-40% humidity and it gets a face full of sun every evening. This boy is beautiful and is as robust as I'd hope a cane-like begonia to be. 10/10, will chop up and propagate to give to friends.

#begonia #amphioxus #im like 40% experienced with cane begonias and this guy - while small - still grows vigorously #and doesnt seem very picky. #also yes that is a terracotta base in a plastic base. #pro tip: that pulls the water away from the plant so you dont have to empty it after watering #lazy life hacks for plant owners

[processusmonomaniak]

AMPHIOXUS : Animal marin ressemblant à un petit poisson, mais dépourvu notamment de membres et d'organes visuels.

(source : Petit Larousse)

#Amphioxus #mer #Ocean #Animal #Nature

[ickie-vicky]

my begonia amphioxus is blooming!

#begonia #begonia amphioxus #indoor plants #plants #plantblr #houseplants

[plantpest]

i don’t remember what this is. some type of begonia i think. the flower is so dang cute though i love it

#my plants #houseplants #plantblr #indoor plants #begonia amphioxus

[commanderpyrrhadve]

got my #1 wishlist begonia today. for 37 bucks including shipping

#@ whoever tissue cultured these in WA i would like to kiss you tenderly on the lips #literally never expected amphioxus to become affordable in aus #now i just have to not kill it :/ #shut up polina #begonias #polina gardens #why is that my tag lmfao

[justgrowplease]

I transfered my begonia amphioxus to humidity sphere. She was shedding leaves and I was afraid she wont have any left like other begonia which i bought with her.

#Plants #Begonia amphioxus #Please live

[ourpickwickclub]

Wow, B! You nailed GR's fatherhood missteps to a tee!!! It's not a contest (although GR might see it as such), but B is someone the boys can count on to love and protect them and to make them a priority. The bonus, bonus, bonus of B & G is how much Blake loves those kids and has centered his life around them. Apollo giving him a "Stepdad of the Year" trophy, being B's constant shadow and "little buddy", Zuma accompanying him (by himself) to record exec mtgs, a concert and him wanting to ride solo in B's truck on his bday, showing King how to drive a truck in mud, to play guitar and adding a pop-up show just to showcase K's talent. I mean this man will bespectacle himself (paps be damned!!) to not miss a second of A's football game. We now know (thanks to that comment on A's bday IG from the architect) , that there's no doubt that A is positively obsessed with Blake. Blake could not take his "Pop" role any more seriously and the boys know it. Really, what we think up to worry about doesn't matter, it's what the boys think and know in their hearts anyway.

And the boys are as much a blessing to Blake as he is to them. Before Gwen he was alone so much. It used to make me laugh in the early days when BARFs would keep saying, he's going to get tired of her brats soon and move on... meanwhile, Blake was building cabins to house everyone, buying obo balls and busting out amphioxus vehicles, buy boats with slides, and dressing up for kid parties. Ya... he really looked miserable... lol. He loved having a family and his family adored him. He didn't miss being a punching bag, being berated and put downs, giving and never receiving, being alone while ML was sleeping with employees and close friends. Remember when someone commented on ML sleeping with her help, Dustin the bus driver in that case, and Blake said some things never change. Anyway, he is a wonderful dad, they adore him, and he has never been happier

-B

[dreamofthemaidenless]

it is, of course, the most ardent wish of all life’s lineages to become a worm, in form if not in name. one must only ponder for a moment to find the worm’s equivalent in most every taxon. the eel comes to mind. as does the snake, and the caecilian, and the filovirus, and the larvae of most insects, and the leech, and the amphioxus, and the true worms, of course. it is the noblest of shapes. elegant and austere and ergonomic and wasteless. it is aspirational, truly. all beings might pray to be so lucky as to have a descendant who has achieved wormhood. matthew are you listening

#the sandman #dream of the endless

[plantanarchy]

My big mama Begonia mellanobullata, Begonia burkili silver edge, and Begonia amphioxus got some new digs this week. I've discovered that Walmart stocks huge, $7 each party bowls and i may just be replacing all my high humidity bowls with them. They're a little flimsier than the $10 target bowls but bigger. The mellanobullata still may outgrow it.

#my plants

[evoldir]

Fwd: Other: CallForProposals.SatelliteEvoDevoMeetings

Begin forwarded message: > From: [email protected] > Subject: Other: CallForProposals.SatelliteEvoDevoMeetings > Date: 2 February 2023 at 10:09:03 GMT > To: [email protected] > > > Dear Friends and Colleagues of the Evo-Devo Community, > > Hope you had a great start into 2023! > > As in previous EED conferences we will have the opportunity to have > Satellite Meetings on specific organisms or topics in the two days > before the EED conference. For example, there were Satellite Meetings > on Amphioxus, Cnidaria, Platynereis and Tribolium in the past. > > If you are interested in organising a satellite meeting for your community > please submit a proposal until *March 31st 2023*: > > https://ift.tt/IPnZQzR > > The Satellite Meetings will take place at the premises of the > University of Helsinki on 24.6 and/or 25.6.2024 and we will have > rooms of different sizes (hence we ask for rough estimates regarding > participants). This means there is also infrastructure for coffee breaks > and lunches. Satellite Meetings are open to all registered delegates and > charged at a supplement fee and should have an expected attendance of > 30 or more. It will be possible to make the bookings for the Satellite > Meetings via the main registration form. > > More information about EED 2024 can be found here: > https://ift.tt/kL69GbE > > Feel free to contact us for additional information ( > [email protected]). > > Jukka Jernvall (EED President) > > Annette Becker (EED Vice-President) > > Sylvie R�taux (EED Program Officer) > > Tom Van Dooren (EED Treasurer) > > Rainer Melzer (EED Secretary) > > Carlos Guerrero Bosagna (EED Marketing and Sponsorship Officer) > > Claudius Kratochwil (Chair of the EED 2024 Local Organising Committee) > > Gerd M�ller (former EED president) > > Society Homepage: https://evodevo.eu > > EuroEvoDevo2024 Homepage: https://ift.tt/NKpGDzw > > EuroEvoDevo2024 Twitter: @EED2024 > > EuroEvoDevo2024 Mastodon: @[email protected] > > EED Society

#IFTTT #Email

[haydendamgaard74]

Lipidomic Profiling of the skin within a Computer mouse Type of Eczema Shows Sex Dimorphism as well as Alterations in Lipid Composition prior to the Beginning of Specialized medical Disease.

6 mg/dl). Analysis of the urate transporter 1 gene unveiled a new homozygous absurdity mutation inside exon 4 (c.774G bigger than A new, r.W258X). Both mom and dad ended up heterozygous for that mutation and the more youthful buddy ended up being later on determined to have got significant hypouricemia (Zero.Six mg/dl). Conclusion: Urate is a vital issue for scavenging oxidative stresses. With this individual, significant contamination could have straight triggered pre-renal AKI, but the likelihood of oxidative tensions under extreme lack of fluids, as well as exercise, may also give rise to AKI. Consideration must be paid out in order to contamination, particularly in young children, to stop the introduction of AKI within individuals together with inherited hypouricemia.Ecosystem characteristics will often be relying on equally enviromentally friendly and anthropogenic difficulties. Elevated need for residing maritime sources has ended in worldwide declines associated with focused kinds, which can be maintained with a single-species paradigm that doesn't totally combine environment factors such as environmental connections as well as environment aspects. Ecosystem-based fisheries supervision (EBFM) is really a more all natural strategy which concurrently addresses human being, ecological, along with environment aspects impacting living sea sources along with assesses these factors with each other with a system stage. With regard to EBFM, reference point items related to administration action need to be quantified. Methods have been developed to designate decision criteria in order to environmentally friendly indicators' a reaction to human-use pressures, but couple of initiatives established determination requirements as a result of the particular combined affect regarding human-use and environment challenges. Many of us converted ecological indicator response in a area influenced by both angling and environmental pressures. Utilizing general ingredient models, we all empirically established crucial details from which a little difference in angling and also environment pressure brings about an unexpected difference in environment reputation. For that Northeast Usa Corner Large Sea Environment, many of us determined critical factors in environmental indicators which represent technique generation, size submitting, community structure, along with ecosystem selleck chemicals performing. Our own findings highlight the call to incorporate both anthropogenic and also enviromentally friendly difficulties regarding delineation associated with ecosystem selection criteria.GnRH, actually singled out through mammalian hypothalamus gland, is really a essential participant in the control of vertebrate processing. Making use of reverse-phase chromatography, all of us filtered a new peptide of comparable molecular size associated with 1182.62 Idet through the cephalochordate amphioxus Branchiostoma lanceolatum. We found that its amino string (pGlu-His-Trp-Ser-Tyr-Gly-Leu-Arg-Pro-Gly-NH(Two)) was identical to that of mammalian GnRH. The very best concentrations (Four.04 +/- 3.Several mu g/g tissues), nearby in the anterior section of the system, happened in November, a period when amphioxus gonads prepare for the actual periodic creating.

[letstalkzoology]

CHARACTERSTICS OF AMPHIOXUS

AMPHIOXUS CLASSIFICATION OF AMPHIOXUS PHYLUM :- CHORDATA (Notochord, dorsal tubular nerve cord present and gill slits present) Group :- ACRANIATA (No head, cranium or brain) Sub-phylum :-  CEPHALOCHORDATA (Notochord along entire body length and persistent) Class :- Leptocardii  (Numerous pharyngeal gill-slits) Genus : Amphioxus GEOGRAPHICAL DISTRIBUTION Widely distributed in temperate and…

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[ickie-vicky]

begonia amphioxus

#begonia amphioxus #plants #indoor plants #houseplants

[tabbednews]

Amphioxus sequencing gives insight on vertebrate evolution

#TabbedNews #News #NewsToday #Breaking #BreakingNews #today #story