Connected on 2013-10-28 13:45:00 from , Colorado, United States
- Bugscope Team waiting for the vacuum
- Bugscope Team to get a bit better
- Bugscope Team hello Greg!
- Bugscope Team Welcome back!
- Bugscope Team Greg!
- Teacher Okay, we are ready, are you?
- Bugscope Team Welcome to Bugscope!
- Bugscope Team You have control!
- Bugscope Team please let us know when you have questions
- Bugscope Team this is a ladybug larva, scratching its head
- Bugscope Team you can see its palps
- Bugscope Team and you can see one of its mandibles, looks like a happy shark from the side
- Bugscope Team right in the middle of the head
- Teacher Are those hairs?
Bugscope Team yes they are -- they're called setae
- Bugscope Team this is what a cute little ladybug looks like before it grows up
- Teacher Are those four things tusks?
- Bugscope Team they're palps, which are extra little feelers that insects use to help them manipulate and also taste their food
- Teacher Where are the eyes?
Bugscope Team they are simples eyes that look like dots. I don't see any at the moment. I think one of the arms is covering the eyes
- Bugscope Team the eyes are called stemmata
- Bugscope Team there's one
- Bugscope Team often there are five per side
- Teacher Which one is the eye?
Bugscope Team it's the thing in the middle that is a bit shriveled
- Teacher Do full grown ladybugs have the same amount of eyes?
Bugscope Team full grown ladybird beetles have much better developed compound eyes.
- Bugscope Team more like this
- Bugscope Team this is a type of true bug, with piercing/sucking mouthparts
Bugscope Team you can see the piercing/sucking mouth parts between the two compound eyes.
- Teacher What are we observing now?
Bugscope Team this is a true bug of some sort. Cicadas, aphids, milkweed bugs, and stink bugs all fall into this category.
- Bugscope Team this, now, is an ant compound eye
- Teacher How many individual eye parts are there on an ant?
Bugscope Team it varies from 10 or 12 ommatidia to more than this, which looks to be about 200
- Bugscope Team individual facets of the eye are called ommatidia
- Teacher Is that an antennae hanging down?
Bugscope Team it's a plant fiber, looks like
- Teacher How many eyes are on a fly?
Bugscope Team generally 2-5. 2 compound eyes, and 0-3 simple eyes.
Bugscope Team the compound eye is what you're looking at currently, with the many, many facets that you see.
Bugscope Team these eyes are the ones used for vision, each facet of the compound eye collects a image from a specific angle, and together gets processed and gives the insect a final image that looks like a mosaic (similar to low resolution images that we see on the computer)
Bugscope Team simple eyes don't quite function this way, and serves more as light sensors, and motion sensors, helping with navigation of flight, and potentially circadian rhythms (internal body clock).
- Bugscope Team there's a closeup of the antenna
- Teacher Like eye pupils?
- Bugscope Team some insects appear to have pupils in their eyes -- praying mantises appear to.
- Teacher Do they have pupils?
Bugscope Team like students?
Bugscope Team sort of, if you look closely at a mantis as it's tracking its prey, you can follow a dark spot in its compound eyes.
- Bugscope Team fruitflies have sponging mouthparts
- Teacher What are the 2 things between the eyes?
Bugscope Team those are the antennae, which have two components
- Bugscope Team there's a kind of padded portion and a branched (aristate) portion
- Teacher What sre those hairs in the eyes?
Bugscope Team those help the fly to better navigate wind currents by telling it the direction of the currents
- Bugscope Team recent research is said to show that males produce a kind of song with the motion of their wings, and the female fruit flies can tune their hearing to those songs using their antennae
- Teacher Are the things in front mouth parts?
Bugscope Team the things we see now, in front, are the chelicers, or chelicerae; they open and close, and at the distal end, south of where we are now, are the fangs
Bugscope Team so yes they are mouthparts
- Bugscope Team spiders feed by injecting venom into their prey that dissolves the internal organs, which they can then suck out like a milkshake
- Bugscope Team spiders also have a capability called autotomy, which allows them to jettison a whole limb if they sense that venom from another arthropod has entered that limb
- Bugscope Team this is the spider's cuticle
- Bugscope Team here is a slightly lower magnification view
- Teacher Setae?
Bugscope Team setae are the hairs we see all over the insect's body, like these for example
Bugscope Team they're mostly related to sensory functions, although they may also be involved in other functions such as thermoregulation
- Bugscope Team some spiders have what are called 'urticating hairs,' which they can project toward an animal, including a human, that may be bothering them
- Teacher Is he facing up or down?
- Bugscope Team it is standing up towards us
- Bugscope Team yes its legs go up because its body, which we see now, is suspended from its legs
- Bugscope Team the kind of daddylonglegs spiders we are used to are not 'true' spiders
Bugscope Team just to make it SUPER confusing, there is a spider with the nickname daddy longlegs, and also a fly with that nickname.
- Teacher What is that round object?
Bugscope Team what we are looking at now is a pollen grain
- Bugscope Team this shape of pollen has been identified with ragweed in the past, but I am not sure that is correct
- Bugscope Team the round part, though -- that may be part of its internal components
- Bugscope Team in humans the maxilla is the upper jaw and the mandible is the lower jaw
- Bugscope Team this is a palp, which are what the accessory mouthparts are called in many insects
Bugscope Team for a majority of insects, these palps are used for tasting and handling food.
- Bugscope Team spiders have what are called pedipalps, and the males use them in mating
- Bugscope Team Joseph is an entomologist here at the University of Illinois.
- Teacher Do we know what kind of wig this is?
Bugscope Team I think it's a moth wing, and it was white except for a central eye spot
- Bugscope Team there are usually mandibular and maxillary palps, so they must in some way correspond to the maxilla and the mandible
Bugscope Team *maxillary and labial
- Bugscope Team wing scales are considered modified setae
- Bugscope Team wing scales have a number of functions
- Bugscope Team you can see the scales of the moth wing here
Bugscope Team they come off very easily, and helps the insect escape from a number of predators, for example, spider webs.
- Bugscope Team this is a kind of weevil. weevils are sometimes called snout beetles
- Bugscope Team they often eat grain
- Teacher IS the snout showing?
Bugscope Team we're looking at the snout, but it is shortened compared to those of many weevils
- Bugscope Team you can see a compound eye to the lower left, and to the right and more into the foreground is the snout, with mandibles at the upper right
- Bugscope Team their mouth parts are at the distal end of the snout, and they use this to chew a hole in the seeds/grains, and lay their eggs inside the hole.
- Teacher What are we looking at here?
- Bugscope Team this is something we've found on these small beetles recently -- these tiny sensillae
- Bugscope Team this is on the shaft of a beetle's palp
- Bugscope Team I am not sure -- I was thinking they are likely chemosensory sensillae
Bugscope Team that would be my guess as well
- Bugscope Team if we went to a high mag we would see tiny pores at the tips of some of them
- Teacher We have to leave now. Thank you so much!
Bugscope Team Thank You!
- Bugscope Team Thanks a lot!
- Bugscope Team Hope you had a good time.
- Bugscope Team see you next year!