Connected on 2014-01-30 18:30:00 from Alameda County, California, United States
- Bugscope Team hello! we're working on presets...
- Teacher just logging on.....students here at 4:30 pm (PST) - online shortly after :) See you soon!
- Teacher looks fun so far!!! Thanks for doing this at a late hour for you :)
- Bugscope Team this is cool because I thought on the macro level we'd lost the honeybee's head
- Teacher very cool. Can't hide from the SEM, huh?
- Bugscope Team this is a good one; you can see that it cuts like an electric steak knife, side by side
- Bugscope Team Hi Kate!
- Bugscope Team Welcome to Bugscope!
- Guest Hi!
- Bugscope Team this is the moth proboscis
- Teacher Hi there! Hi Kate!
- Bugscope Team it's slit down the center
- Teacher We are ready to roll!
Bugscope Team awesome; so are we
- Bugscope Team CSU you have control.
- Bugscope Team this is the moth proboscis, and as often with moths, the whole insect is charging up with electrons
- Bugscope Team it is very difficult to coat them well.
- Bugscope Team -- to make them conductive, because they're covered with scales
- Bugscope Team the proboscis is coiled when it is not being used
- Bugscope Team this is a honeybee claw
- Bugscope Team you can see that it has sensory setae on it that let the bee know when something is within its grasp
- Bugscope Team I'm sitting at the SEM, the scanning electron microscope, so I can make small adjustments in the focus and contrast/brightness as we go along
- Bugscope Team because insects do not have skin -- they have an exoskeleton, like a shell -- they do not have nerve endings like we do that help us sense things we might be touching
- Bugscope Team instead they have thousands of setae that stick through the exoskeleton and help the insect sense its environment
- Teacher tell us more about their sensory setae Scot
- Bugscope Team some of the setae are mechanosensory, so they pick up touch, and wind
- Bugscope Team some are chemosensory, so they can smell with them, but their discrimination of scents is far better than ours
- Bugscope Team some are also (the setae) thermosensory, so they can sense hot/cold
- Bugscope Team this is the combined head/thorax of a spider
- Bugscope Team called a cephalothorax
- Bugscope Team right off it's a clue that this is not an insect, which has a separate head and thorax, and also, sometimes, what is called a prothorax
- Bugscope Team we can see that the spider has eight eyes
- Bugscope Team they also (spiders) rely on setae to sense their environment
- Bugscope Team they're very sensitive to vibration
- Bugscope Team of course, I guess...
- Bugscope Team spider eyes are often not very good
- Teacher What purpose do the hairlike fibers perform for the insects?
- Bugscope Team the hairlike fibers are the setae I've been talking about that have chemosensory, mechanosensory, thermosensory, and other functions, such as tenent setae that help some insects stick to things. also, scales on moths, butterflies, silverfish, and mosquitoes are modified setae that help protect them from spiders
- Teacher This is Alan from the center table group.
Bugscope Team Hi Alan!
- Teacher Thanks Scot
- Bugscope Team there are also much smaller setae that do not connect through the chitin to nerves below, called microsetae
- Bugscope Team microsetae form patterns that help with species recognition, they likely help with thermoregulation, and they also likely help catch air when an insect is flying'
- Bugscope Team bees, alone among insects, have branched setae
- Teacher Are we looking at the honeybee's eye?
Bugscope Team yes to the right we can see one, with setae sticking out of it
- Bugscope Team center bottom is the hinge of one of the mandibles
- Teacher What do the setae do for the eyeball
Bugscope Team they are said, in fruitflies, to help them sense wind speed and direction
- Teacher Very cool
- Guest Do spiders or insects rely more on setae?
Bugscope Team because insects often have other kinds of chemoreceptors, and they can have better eyes, I'd go for the spiders being more dependent on setae
- Teacher Where is the pupil for the eye?
Bugscope Team there is no pupil; they are compound eyes; I am not sure why praying mantises seem to have pupils, however
- Bugscope Team with compound eyes, all of the ommatidia serve as tiny individual lenses
- Teacher This is Alan again. I'm interested to see a spiders stinger. I understand that spiders sting their pray to stun them. Where is this stinger?
Bugscope Team spiders have fangs on the underside of their head, or at the front if they point them that way; they're at the tips of the chelicers, or chelicerae
Bugscope Team the fangs have venom pores; they inject venom into their prey that dissolves the internal organs; then they use the fangs again to suck up the dissolved internal organs like a milkshake
- Bugscope Team the fangs are on the side of the spider's cephalothorax that we cannot see
- Bugscope Team I do not see that my one message went through. Does it still say that sjSEM is replying?
- Teacher Hello, this is Catherine and we are changing groups
Bugscope Team Hi Catherine!
- Teacher First question, why does the eye have so many "circles"?
- Bugscope Team the circles are the individual facets of the eye, called ommatidia; each is an independent lens
- Bugscope Team a compound eye, in many insects, can be large enough to curve around the head, giving the insect very good peripheral vision
- Bugscope Team also, compound eyes update very quickly -- they make the insect very sensitive to motion
- Teacher What is the smooth part in the bottom right corner?
Bugscope Team that is a scale from a moth or butterfly
- Teacher can focus on that section, please?
- Bugscope Team it is actually ridged, like Ruffles potato chips
- Teacher what is the purpose of the ridges?
- Bugscope Team the ridges make the scale rigid without adding too much weight, and they also, in some cases, interfere with the wavelengths of visible light, so they produce refracted light in different colors
- Teacher that is so cool, thanks!
- Bugscope Team this is likely not from a moth or butterfly, now that we see it up close, because it does not have a secondary lattice pattern between the ridges
- Bugscope Team this is a very small ant
- Bugscope Team the ants we've been able to collect are so small that they are hard to handle with forceps without breaking them
- Teacher can you zoom in on the mouth please?
- Bugscope Team so we often make horrible messes of them trying to put them on the stub for Bugscope session
- Bugscope Team sessions...
- Bugscope Team serrated mandibles
- Bugscope Team when we see lines parallel to the frame of the image, they are from the sample charging up with electrons
- Teacher This is Alison, what are the two white "pointy things" above the mouth?
Bugscope Team those are likely mechanosensory setae, like cat or rat whiskers, that let the ant know if it has bitten something
- Teacher okay thank you!
- Bugscope Team you can see that the mandibles cut things, with those serrations
- Bugscope Team this is cool
- Bugscope Team here we see something else interested
- Bugscope Team interesting
- Teacher Hi Scot, this is the next group of students. My name is Anelyse. We are super interested in knowing more about bees and their stingers! What can you tell us!?
- Bugscope Team Hi Anelyse! The stinger, we can see now, is in two parts that slide side by side to cut into your skin
- Teacher it seems to have a lot of hairs next to the stinger, does that help it in some way?
- Teacher do all bees have stingers? if yes, like this one?
- Bugscope Team so it is a blade for piercing the prey and injecting venom quickly
- Guest It looks like there is a break in it. Is there?
Bugscope Team yes between the halves, is that what you mean? we can see, also, that there is dried fluid down the center
- Teacher ovipositer is more similar to in another animal?
Bugscope Team um turtles have something like that, for laying eggs
- Teacher what kind of fluid? can you refocus and show us the dried fluid?
Bugscope Team see down the center where it looks black?
- Teacher yes we can see that
- Bugscope Team the fluid charges up with electrons and does not allow the signal to come from that area
- Bugscope Team so that is likely venom, and it comes out where the sides slide, side by side
- Teacher we're going to zoom out to see the whole bee, thanks Scot you are awesome
- Bugscope Team see how the sides are barbed so they both cut and hold into the skin of the prey?
- Bugscope Team to the left you can see amother claw
- Bugscope Team another clas
- Bugscope Team D'Oh!
- Bugscope Team claw
- Bugscope Team ant compound eye
- Bugscope Team some wasps/hornets can have as many as 17,000 ommatidia in one eye
- Teacher wow this is cool, is it full of little eyes?
Bugscope Team yes it is!
- Bugscope Team you can see that the ant is charging up with electrons, doing a cannonball, upside down, and broken
- Bugscope Team female fly
- Teacher thanks Scot, the next group is coming.
- Teacher hows the weather in illinois?
- Teacher it's like 70 here...
- Bugscope Team with flies, the males' eyes are usually close together, like Mikhail Baryshnikov
- Bugscope Team haha it's a heat wave today
- Guest His eyes are really close....
- Teacher Hi Scot, we're the last group...
- Bugscope Team the shiny things we see are the antennae, kind of hard to tell, I know
- Bugscope Team the antennae are glowing because they are loose
- Teacher What is that large hole below the fangs?
Bugscope Team that is the opening for the mouthparts
- Bugscope Team this fly has spongin mouthparts like a housefly
- Bugscope Team sponging
- Teacher can you show us what the eye looks like?
Bugscope Team sure!
- Bugscope Team so to the right is the vestiture
- Teacher What is the debris on the eye?
Bugscope Team there is a single seta there that is broken
- Bugscope Team this is a spiracle, from which the fruitfly breathes
- Teacher what is the slinky like thing?
- Teacher I was looking at a spider leg and i noticed hairs and something that looks like thorns. whta was that?
Bugscope Team spiders have differnt types of setae, and some spiders have what are called urticating hairs that they can shoot at something that is bothering them; I kind of doubt that is what those were, but maybe
- Bugscope Team the slinky thing is a trachea, an inner ventilation tube that carries air to the organs
- Bugscope Team the spiracles open to the outside air, and these are what carry the air
- Teacher This is super cool! can we see the trachea because the body part is borken off?
Bugscope Team exactically
- Teacher HI Scot - Michele here again. We are going to log off and let you go home :) Any final thoughts? AWESOME images!!
- Bugscope Team it is really cool, like you said
- Teacher Thanks for chatting , Kate!!!
- Guest Thanks!!!
- Bugscope Team I really appreciate you all getting on and asking good questions.
- Bugscope Team Thank you, Kate, as well!
- Bugscope Team see you next time
- Bugscope Team hi S
- Bugscope Team are you still there?
- Bugscope Team I'm going to shut down soon, but do you have any questions?
- Bugscope Team S?
- Bugscope Team okay, Thank you!
- Bugscope Team see you next time