Connected on 2014-01-27 15:00:00 from Alameda County, California, United States
- Bugscope Team sample is in 'scope and we are pumping down
- Bugscope Team waiting for the vacuum to get better
- Bugscope Team 1.6...
- Bugscope Team going for 1.3
- Bugscope Team 1.4
- Bugscope Team Joe!
- Bugscope Team hey
- Bugscope Team does this look familiar?
- Bugscope Team it's one of those professional thoraxes
- Bugscope Team ha! somewhat
- Bugscope Team that is really similar to the cerambycid pheromone gland pores
- Teacher Hi all- just getting my students set for the session- will be interacting in about 10-15 min.
- Bugscope Team we are ready to roll
- Bugscope Team cucumber beetles and cerambycids are fairly closely related
- Bugscope Team ah. I thought we'd just found the unifying theory of all entomology
- Bugscope Team haha that would have been sweet
- Bugscope Team oh well
- Bugscope Team this is the compound eye of the fruit fly
- Bugscope Team the spikes are setae, or bug hairs
- Bugscope Team the hexagonal things are the ommatidia
- Bugscope Team compound eyes allow insects/arthropods to see more at once; they give them better peripheral vision
- Bugscope Team compound eyes are often domelike, and they can extend almost all of the way around the head of some insects
- Teacher Can you describe what we are seeing here?
Bugscope Team these are the individual ommatidia (facets) of the fruit fly's compound eye
Bugscope Team each of these facets help contribute to the overall image, this creates an image that resembles a mosaic
- Bugscope Team also, they update very quickly, so they enable insects to see when something is coming after them
- Bugscope Team they update quickly in the fruitfly's brain, for example, most of which is devoted to visual processing
- Bugscope Team depending on whether the insect is nocturnal or diurnal, the internal areas of the ommatidia are set up differently
Bugscope Team nocturnal insects have a setup where light gathered from neighboring ommatidia also bleeds slightly through
- Bugscope Team the bristles, or setae, we see here help the fruitfly sense wind speed and direction
Bugscope Team most insects have many of these sensing setae all over their bodies
- Bugscope Team Joseph is an entomologist, so he is our expert.
Bugscope Team "expert", both Scott and Cate have done this long enough that they know as much if not more than I do.
- Bugscope Team many flying insects can see in the ultraviolet wavelengths of light, which we cannot
Bugscope Team in exchange, many don't see wavelengths of light in the red part of the spectrum.
- Bugscope Team with Monatrch butterflies, the males and the females look similar. The patterns on males' wings are finer, and they have a spot not seen on female wings.
- Teacher Sorry we are so slow = we are ready to roll now. Thanks for all the information.
- Bugscope Team but to other butterflies, the colors of the wings look quite different, because they can see in UV, and the wings have distinctly different colors in UV.yl
- Bugscope Team there is a pulvillus here, the pad of fur under the claw, the helps the insect stick to vertical surfaces
- Teacher What is this???
Bugscope Team the is the distal end of a leg on a beetle, at the top is the tarsal claw
- Bugscope Team the little hairs on the pulvillus are called tenent setae
- Bugscope Team the thickened covering over the wings is called the elytra
- Bugscope Team to the left you could see a ladybug larva
- Bugscope Team insects all have, as adults, a head, a thorax, an abdomen, two antennae, and six legs
Bugscope Team most have two pairs of wings, flies are an exception, and the beetles' forewings have been modified into a hard shell that acts as an air foil of sorts
Bugscope Team flies have only one pair of wings, the second pair have been modified into something called halteres, which help with orientation and balancing during flight
Bugscope Team strepsipterans also have halteres, but it's their forewings that have been modified instead of the hind wings like in flies
- Bugscope Team insect claws often have only two 'tines'
- Bugscope Team and some can open and close
- Bugscope Team there is a tendon called an unguitractor that allows the claws to open and close
- Teacher i am inviting students to run the scope now.
- Bugscope Team super cool
- Bugscope Team this is a fly's tongue; we have to remind ourselves that it is dried out, a bit
- Guest colorblind
- Bugscope Team haha I crashed out of the software as Scot
- Teacher Do flies have tastebuds?
Bugscope Team yes they do, and often they have them, as other insects do, on other parts of the bnod
Bugscope Team some butterflies and moths have taste receptors on their feet
- Teacher is this the fly's head or just the tongue?
Bugscope Team this is the proboscis, the extension of the mouth
Bugscope Team the head is above
- Teacher Can you show us the fly and then where the tongue is located? Not sure how to navigate that
Bugscope Team lot easier for me, sitting at the microscope
- Bugscope Team the semi circle dome is the head, the compound eye is slightly above the center of the image
- Bugscope Team this fly was in a bowl with a lot of other insects, so it has moth scales and other debris all over it
- Bugscope Team this is the compound eye
- Bugscope Team if you see a palm frond in a painting of a saint, it is a sign of martyrdom
- Teacher Do they see well at night?
Bugscope Team some insects do, like moths, and some do not
- Bugscope Team monster
- Bugscope Team this is the head of a cranefly, one of those lumbering insects that looks like a big mosquito
- Teacher is this the head
Bugscope Team yes it is!
- Guest are flies coloblind?
Bugscope Team they have colors they can see and colors they cannot
Bugscope Team this applies to most insects. For instance, bees don't see red, but they see in UV.
- Bugscope Team some of the ommatidia are sunken in
- Teacher what is ommatidia?
Bugscope Team that is the name for the facets of the compound eye. singular is ommatidium
Bugscope Team simple eyes are called ocelli
Bugscope Team and simple eyes in larvae are called stemmata
- Teacher is there vision multiple images or just one?
Bugscope Team I think it is assembled into a whole image by the brain
Bugscope Team yup, it's akin to a low resolution image on the computer, pixellated
- Teacher what causes the ommatidia to sink? on the last fly we noticed that they weren't sunken in.
Bugscope Team it's just that they get dry and shrivel up
- Guest What kind of a test do you run to determine what colors they can see?
- Bugscope Team we may see the best ommatidia on the moth compound eyes, if they do not charge up with electrons
- Teacher Can we see the whole fly?
Bugscope Team no I am sorry -- the 'scope is at 40x right now, so the only whole insects we can see are quite small
- Bugscope Team the wings are missing; it is kind of a mess
- Bugscope Team this one is missing most of its legs
- Bugscope Team here is one of the halteres, and the thoracic spiracle
- Bugscope Team that weird extended bulb is the haltere
- Teacher do you guys have any ants that we can examine?
Bugscope Team not today, I'm sorry
- Bugscope Team the stub is 1.75 inches in diameter...
- Bugscope Team you can see that this stub is, uh, split level
- Bugscope Team spider setae
- Guest neat-o !
Bugscope Team that was a CCD (infrared camera) view of the inside of the vacuum chamber, showing the stub the critters are mounted on
- Guest Are those hairs? And if so, what purpose do they serve?
- Guest how many legs and how many eyes does this spider have?
Bugscope Team if it was intact it would have eight legs, probably eight eyes, two palps we can see now, two chelicers, or chelicerae, and two fangs
- Bugscope Team the palps (pedipalps) of male spiders are often large and bulbous, like oversized boxing gloves
- Teacher are those the legs?
Bugscope Team to the left are the pedipalps, and to the right we see the bases of the legs, which Cate probably tore off.
- Bugscope Team spiders can sense when venom, like from another spider, from a bite, is entering their body
- Teacher what are the parts of the spider?
- Bugscope Team if a leg was bitten by another spider, and venom is entering that leg, the spider can do this thing called autotomy, which means it can jettison that leg, just make it fall off
- Guest How did you test the spider to know that a spider can sense venom?
Bugscope Team apparently people have tested that and reported those results; we have not
- Guest after autotomy can the spider grow its leg back?
Bugscope Team not unless it has more molts in its lifetime. Only spiders that live a long life like tarantulas can do this
- Teacher We are a new group of students. I was wondering if you could locate a fly's antennae for me
Bugscope Team here are the two portions of the fly's antenna
- Teacher what are the two portions?
- Bugscope Team the thin part is called the arista, or it is called the aristate portion of the antenna -- the branched, thin part
- Bugscope Team the other part is sometimes called the pedicel.
- Teacher This is the best!
- Teacher The bomb.com
- Bugscope Team it's the pill-like part with the 'fur' on it, and inside is the Johnston's Organ.
- Bugscope Team the Johnston's Organ can sense the vibrations of another fly's wings
- Teacher Do they serve different functions?
Bugscope Team yes
- Bugscope Team I am not clear on exactically what each part does and does not do, except that the pedicel portion houses the Johnston's Organ
- Teacher From how far away? Is it covered with even tinier hairs?
Bugscope Team not sure what the distance would be
- Bugscope Team so yeah, this is the pedicel, with microsetae on it
- Bugscope Team you guys we are going to have to wrap up soon, I am sorry
- Teacher Are a fly's hairs made of the same proteins as a human's hair?
Bugscope Team they are made of chitin, which is more like our fingernails
- Bugscope Team these are plumose setae on the spider
- Bugscope Team they're like pine trees, kind of
- Teacher Can you show us the eyes?
Bugscope Team no I am sorry -- they are on the other side of the head
- Bugscope Team if you do not get to see certain things today, you can go to google and type Bugscope spider eyes
- Teacher Can you find us some eyes on whatever slide you have of a spider?
Bugscope Team the samples are mounted on an aluminum stub, coated with gold-palldium, and they're inside the vacuum chamber, so we cannot, for example, swap out a sample
- Teacher D you have the fangs?
Bugscope Team they are, unfortunately, out of view to the upper left
- Bugscope Team not much left of teh spider, but that is what they are like, often difficult to predict what they will look like
- Bugscope Team 'the spider'
- Bugscope Team you can see the abdomen, to the lower left
- Bugscope Team these are the spinnerets
- Bugscope Team where the wweb comes from
- Bugscope Team I am sorry -- I am going to have to give the microscope up this afternoon.
- Bugscope Team yes we need to shut down...
- Teacher We are going to sign out - just checking on looking at images of ants - if we google Bugscope and ants, we will see images from other Bugscope sessions?
- Teacher OK- we will sign off :0 THANKS!!! Talk to you soon.
- Bugscope Team we have to go, I am so sorry...