Questions tagged [arthropod]

An arthropod is an invertebrate animal having a segmented body, jointed appendages and exoskeleton. Arthropods form the phylum Arthropoda, which includes the chelicerates (horse shoe crabs and arachnids), insects, myriapods, and crustaceans. Use 'entomology' tag if the question is specifically about Insecta.

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What bug has similar legs to a prawn?

This is a bug that I observe in Melbourne. This bug is living in wet places and jumping a few centimeters while its length is 8.5mm. It does not have insect legs. It's legs are more similar to prawn. ...
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For which wing characteristic are Plecoptera (stoneflies) named for?

I'm coming across variable etymological meanings for the order Plecoptera (stoneflies). Some sources indicate the meaning is "wicker/braided-winged", while others suggest "folded/...
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What is this small brown arthropod? [duplicate]

Does anyone have an idea what this arthropod is? I first found one in the bath but have since noticed them on the walls, ceiling and on linen around the house. They are 1mm long, look brown in colour ...
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What type of animal is this? [duplicate]

There was a leaking fire hydrant across a sidewalk. On the other side was a lake. The fire hydrant water was streaming across the sidewalk. I saw it swimming in the sidewalk away from the side of the ...
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Help identifying a mite (?)

I live in Cambridge, UK, and found these mites (probably? not sure) in the attic. There are no bird nests at or around the dwelling, and no traces of rats or mice. There are plenty of those and not ...
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Explanation for lack of wing-leg-fin transformations in arthropod evolution?

I don't know much about evolutionary biology so I may be missing something obvious. It seems that vertebrate evolution somewhat frequently re-invents the fin out of the leg or wing and the wing out of ...
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Which species is this in below picture? Can you please give me some details or reference link?

Can you name this species ? What are some characteristic ? Size: 2.5 inches to 3 inches Diameter: 1mm to 2 mm Can crawl like millipede but little slow. Always in red colour Get fold like in one of ...
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What arthropod with a distinctive yellow and black colored body is this?

I found this outside my window, today morning, on a clothes peg; I live on the eighteenth floor, so it probably is a good flyer. I have noticed that the antennae are almost as long as its body and ...
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What is this tiny bug [duplicate]

I have seen these on my floor several times now that spring has arrived and temps have started to go up. It is silvery in color, appears to have a hard and segmented shell, it kind of reminds me of a ...
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Arthropod identification request (a spider with no legs?)

My mother sent me a picture of a creature she encountered and couldn't identify. It looks kind of a like a spider - a mostly black body, about 1cm in size, with white specks - except without any ...
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Any clue on what these tiny white bugs may be?

I would like to know what the bugs in the following pictures are, they are absolutely tiny, i would say 0.5mm at most, i can't get a really sharp picture, as they seem like to hang out in the dust on ...
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Difference between haemocoel and coelom

I am looking for an embryological perspective on the following question. I know about coelom derivation, but I want to know how haemocoel is derived and how it is fundamentally different from coelom. ...
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What arthropod is in the picture?

I am from Philippines and I found this in my room. This arthropod has 6 legs and have a bit long Chelicerae like spiders that can fold to hold its food. It's about half an inch long. It also looks ...
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How long might a tick be on a body before biting?

I understand that a tick must be attached for roughly 24+ hours before presenting a danger of transmitting Lyme Disease. However, I am wondering how long a tick might be on my body before actually ...
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What is this strange sea creature we found on the beach?

We found this on a beach in North Devon, UK. I've never seen anything like it. There's a yellowy-ball in the middle with 5 pointed shells attached to it, each of which seems to have a single "leg&...
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Absence of cytoplasmic Intermediate Filaments in Arthropods

Cytoplasmic intermediate filaments such as vimentins support the architecture of the cell and have been known to aid signaling processes. However, as in this article, it is stated that out of all ...
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Identify arthropod with many legs in Mumbai

Can someone please identify this ~5 cm long arthropod? I've been finding one of these every 2-3 days inside my apartment ever since rainy season started here in Mumbai (June). The bulb portion is its ...
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Is there any small animal that can jump over a meter high/long?

By small, let's say less than 5 cm body length. I always thought that grasshoppers were the highest absolute jumpers in this class but the highest jump according to this article is 0.7 m...
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What species of spider is this? Could anyone help

This image was taken in assam, India. The size was around 1cm. Could anyone help identify?
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Why do Centipedes always have an odd number of pairs of legs?

Furthermore, centipedes are within the Myriapoda, a subphylum of arthropods which also contains millipedes. Do millipedes also have an odd number pair of legs?
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Is this arthropod non-intrusive and recommended to be left alive?

I am in Portugal (Lisbon) at the moment, and when leaving my room late at night (12 pm ~ 04 am) I usually face about 4 of these arthropods in the corridors: (For reference, the "line" in the image is ...
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Spider identification (Caribbean)

I live in the Caribbean (Puerto Rico) and found this spider in my garage. Is it venomous? It measures about 8 inches as a whole.
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Unidentified Spider

Apologies for the rubbish quality of the image, but I found this spider while in the shower. I’m not exactly sure what species it is and wonder if someone can help me out. I live in southeast ...
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Can anyone identify this mite? [duplicate]

I live in a flat in the UK and have caught such mites a few times on my skin. I think they are responsible for my bites. On one occasion one mite had one dark spot in the middle instead of two. Does ...
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What are these near microscopic white bugs from my comb?

I saw a whole bunch of white bugs crawling on my comb in the medicine cabinet, they didn't photograph well but I did manage to get a bunch of them in mineral oil and eventually take some micrographs. ...
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Evolution of the unique mating system of the scorpion Androctonus australis

Sperm transfer in the scorpion Androctonus australis involves a sclerotized spermatophore, which is formed in the paraxial organs of the male reproductive system. The right paraxial organ produces the ...
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How do we know how long hermit crabs live in the wild?

This article states that hermit crabs in the wild are extremely difficult to track because they constantly change shells and even gender. Later in the article, they say that hermit crabs can live 4 ...
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Can Chilopoda "vocalize" or produce sound for the express purpose of communication, as opposed to sound as a byproduct of other movements?

Is there any species of Chilopoda that can "vocalize" or or otherwise produce sound for the express purpose of communication, as opposed to sounds it might create as a byproduct of other movements ...
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is this a brown recluse spider?

What kind of spider is this? SE Michigan, light brown color, second picture less focused but w tape measure for scale. Thank you!
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what is this bug ? i found it on bed 2 times

What is this 1mm long bug I found on my bed in Egypt? Here is its back photo
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What is (probably) the closest living relative of the trilobite?

The trilobites vanished from the fossil record many millions of years ago, but they were obviously arthropods of some sort. Do we know which animals are their closest living relatives? I've heard both ...
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Tiny white very hard cell bug! Please help to identify!

I found these bugs walking on the floor/ wall and on my laptop. And unfortunately I think they could be in my bed, too, since I bring my laptop to bed sometimes. I live in a big city in the ...
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Are These Oyster Crabs?

I found these crabs at the end of September, 2018. My family was vacationing on the coast of Lopez Island in the Pacific Ocean off of Washington State. I have been trying to figure out what they are ...
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Were there any terrestrial species in the ancestry of all crustaceans?

To the exception of woodlice, Crustaceans live in aquatic (marine or freshwater) environments. Crustaceans are arthropods which is an immensely diverse taxon. Many arthropods live in terrestrial ...
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What are these tiny, swarming, jumping bugs?

I built a small plywood box in my yard (on Long Island, NY, USA) for some stray cats about a year ago. I didn't bother waterproofing the box, and so over time the box has gotten damp. About two weeks ...
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Is a female spider, well-fed by sexual cannibalism, less likely to mate again?

The Wikipedia page on sexual cannibalism (e.g. female spiders eating their mates) currently has a statement that sounds wrong to me, but I don't feel expert enough to edit it out: An additional ...
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Do we know how dangerous six-eyed sand spiders are?

The Sicariidae family contains the well-known and dangerous Loxosceles spp. (fiddle-backs, violin spiders). The family's other two genera, Sicarius and Hexophthalma (six-eyed sand spiders) have ...
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Why is this spider wound in such a dense web?

I saw this thing yesterday on my window curtain, and I've been wondering what this is. It looks like a dense network of spider web, and the spider inside it is visible. I thought the spider was dead, ...
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Can Anyone Identify this Tissue?

I am hoping someone can identify the image below My wife felt a bug bite her and found this in her hair now she's worried that it was a tick. the photo is at 40X under microscope. I'm guessing it's ...
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Looking to identify this species

I found a rather strange invertebrate...something... outside my home this evening, and I have no idea what it might be. It looks kind of like a small brown lobster, without the claws. I think it has 8 ...
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What arthropod is this?

Location: Johannesburg, South Africa Colour: Brown/Grey Legs: 6 or 7 pairs Size: ~10mm I've been finding these guys in my bath tub the past two mornings. I've caught and released them. I'd like to ...
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Identify this larvae that lives on a musrhoom?

I was in the forest near the Rhone river in France and I uncovered some mildewy wood bracket fughi (Ganoderma) on a fallen willow tree. It was a scene from a sci-fi film. some arthropod larvae of 2-...
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Costa Rican Centipede Species

What species of centipede is this? Found it 3 miles from San Ramón, Costa Rica
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Can anyone identify this garden orb weaver spider?

Found in low foliage in Harare Zimbabwe. Argiope flavipalpis or A.levi
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What kind of spider is this and is it poisonous?

A brown furry diamond shape on its back and brown joints all on black body. Caught entering my house in Trinidad (small island off South America) -- killed the first one, this is the second.
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Are any arthropods poisonous to the touch?

I'm particularly interested in whether any insects are poisonous to the touch. Note that toxic-bristled caterpillars are actually venomous, since in all species I'm familiar with, the bristles ...
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Did insects and arachnids diverge before or after moving to land?

Question: Are arachnids and insects so distantly related that they were already diverging before their (independent) emergence(s) on land? I am curious to know what the fossil record and molecular ...
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Identification of Unknown Insects found in landfill (spider like)

Could someone help me to identify the following spider-like insects? They are very small, so I used a macro lens to capture them. I have tried to capture them as clearly as possible. They are about ...
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What kind of Brazilian Arthropoda is this?

It looks like a Diplopoda, but I've never seen anything like that. A friend took those pictures in the Brazilian Cerrado (Goiás state, Brazil) these days (October, start of rainfall in Spring). It was ...
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Can someone identify this spider?

Saw this on the street in the UK. To my eyes it looked and moved distinctly tarantula-y (although I don't have any firsthand experience with them) which I'm pretty sure we don't have any of natively. ...