However, there is a way to find out what the insect egg is. If you need expert professional advice, contact your local extension office. These are an artifact of the chorion production process in females. Fill in your details below or click an icon to log in: You are commenting using your WordPress.com account. I guess eggs are more than just cue-ball look alikes…, GREAT MICROGRAPHS…. The structures I mentioned above are the typical structures you find on most insect eggs. Okay, first things first! I’d love to micrograph odonate eggs sometime though! Still, giant water bugs have the same structures as other insect eggs and those structures do the same things for the insect developing inside the egg as they do in other species. http://portraitsofwildflowers.wordpress.com. The exact path oxygen takes from the atmosphere to the developing insect is a little complicated and probably varies from species to species, but the aeropyles are where the path begins. It’s true, patterns are everywhere. Exuviae or the shed skins of insects are also fascinating. According to Featured Creatures : “You can scrape off the egg masses and allow them to fall into the water since inundated eggs will not hatch. These eggs, resembling a ninja’s iron spike ball, belong to the stink bug (Podisus maculiventris). If you look very closely at the image (you can click on it to make it bigger), you can see little white marks within the micropylar area. Nature is so cool! Yeah, convergent evolution is pretty amazing. | BEES AND POLLINATIONS, Fascinating stuff! Sperm enters the egg through micropyles. ( Log Out / Sperm have to get inside the eggs to fertilize them and have to go through the shell to do so. The shape of those cells are the same shape as the polygons of the shell! « Bug Girl’s Blog, Circus of the Spineless #60! I think they look rather like lunar craters! This meshwork is thought to trap air against eggs when they are underwater so that they don’t drown. Part I | Ask an Entomologist, North Carolina Museum of Natural Sciences Blog. Pingback: Wait, Insects Breathe!? Some insects do this, others do not. If you want to win the mug, be sure to leave a comment here for your chance. Female insects produce the eggs, but the chorion is deposited before the eggs are fertilized. EVERYTHING in today’s post was something new for me. IF YOU NEED THE PUBLISHED PAPERS KINDLY EMAIL AT firstname.lastname@example.org I HAVE JUST PUBLISHED THE EM OF A ZYGOPTERA WITH A UNIQUE MICROPYLAR APPARATUS AND PRESENTLY I AM WORKING ON AN INTERESTING GOMPHID…. Let’s start with a cluster of eggs: Some insects lay their eggs in clusters and others will lay them one by one and really spread them out. ), but those polygons represent the shape of cells that are involved in building the chorion and they’re visible on many insect eggs. Change ). If we zoom in a bit closer, we can start to see what the eggs look like: Abedus herberti eggs happen to change in structure about halfway down, so that’s why you can see the brown change to grey in the photo above. Steve Schwartzman Sorry, your blog cannot share posts by email. Oxygen enters through aeropyles. Many are white, but some are … Here's how to add your images. I’m still taking entries for my contest for a few more days! Water bugs also usually have plastron networks that may be responsible for their survival while they are underwater. Fascinating stuff, and beautifully detailed! In this image you can see the fine structure of the chorion and see all the little polygons that cover the surface of the egg. Many insect eggs exhibit raised polygons similar to the ones you see in the Abedus herberti egg. Sometimes, the eggs are laid on top of grass stems or other vegetation. The eggs of some insect pests hatch within hours, which can make identification difficult. Step 3 They will help you identify the eggs and the insect… Just remember that parental care of eggs is rather rare in insects, and the paternal parental care of the giant water bugs barely exists outside their group. The arrow in the photo above shows one micropyle within the micropylar region of Abedus herberti. Home Guide ID Request Recent Frass Forums Donate Help: Clickable Guide . Would love to see a pic of a hydropyle to compare structure with the other two entry paths you showed for sperm and for air. Giant water bugs absorb water from the environment and the water passes through a structure at the base of the chorion called the hydropyle. Others keep them localized in specific areas (Google “pentatomid eggs” for some good examples). That area is called the micropylar region. I work with giant water bugs in my research, but the main focus of my work is actually their eggs. This blog is a great discovery for me …. Let’s zoom in a bit more and get a good close look at the chorion on the top of the egg: This image was taken using a scanning electron microscope (SEM) so that you can get a VERY close look at the structure of the chorion! If anything needs to get into or out of an egg, it has to go through the shell. The embryos developing inside the egg need oxygen to survive, but they have to get it from the atmosphere outside the eggshell. Most are found in clusters, but others are found singly. That means the oxygen has to cross the eggshell before the embryos can make use of it. Post was not sent - check your email addresses! Obviously giant squid and humans are not closely related, yet they share a very similar structure. ( Log Out / I’m looking at brooding behaviors in giant water bugs and how the behaviors contribute to the survival of the eggs. The arrow in the image above points to an aeropyle on the chorion of Abedus herberti and you can see several of them dotting the surface of the egg. Insect Eggs Identification Photos . Part I | Ask an Entomologist. ( Log Out / That’s because the eggs in this species have a structure called a plastron network. One thing that intrigues me is so-called convergent evolution, in which two unrelated species develop the same feature. Flea Egg Characteristics. You need to spend a lot of time peering underneath leaves of shrubs, herbaceous plants and grasses. There is a second micropyle to the left. I too study something tangential to the morphology that I’ve done. They enter through the micropyles to pass through the chorion to the egg waiting inside. There’s a lot of variation, but they all share a common goal: allowing oxygen to enter the egg. I’m not going into it now because the process by which insects produce eggs is long and involved and better suited to a series of posts (I wrote 19 single spaced pages on this subject as part of the written part of my Ph.D. comprehensive exams!
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