#strepsiptera

[yupmabel]

if i were a furry i would be unstoppable and make fursonas for every unloved animal anyway here’s strepsiptera

[dailybugfacts]

can you share any facts about Strepsiptera? they're extremely underrated and not enough ppl talk about them imo

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TODAY'S FACT IS

Did you know that Bahiaxenos Relictus is the only member of its taxonomic family? This relatively recent discovery and description (2009) is only known to be found around sand dunes near Rio São Francisco in Bahia, Brazil. This small strepsipteran has 8 antenna segments which is unique among living strepsipterans.

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Diagram by Freddy Bravo et al

[cuttledreams-bugs]

Invertebrate Tarot:

Card 7: The Lovers

Two parasitic Strepsiptera bound by fate to find each-other in the brief and narrow window they have. A relationship as inevitable as it is violent.

[bestanimal]

Round 3 - Insecta - Strepsiptera

(Sources - 1, 2, 3, 4)

Order: Strepsiptera

Common Name: no common name, sometimes called “twisted-wing insects” or “twisted-winged parasites”, referencing the English translation of the order name

Families: 10 - Bahiaxenidae, Mengenillidae, Bohartillidae, Halictophagidae, Callipharixenidae, Corioxenidae, Elenchidae, Myrmecolacidae, Xenidae, and Stylopidae

Anatomy: larvae are grublike, covered in minute hair-like structures (microtrichia); well-developed, large, bristle-like cerci at the back of the body are attached to muscles, which allow the larvae to jump; the tarsal segment of their legs have structures which allow them to cling to their hosts; once larvae find a host they molt, lose their legs, and become immobile; adult females are neotenic in form, lacking wings, legs, and eyes, and have a fused head and thorax; they do not ever leave their host (except for females of the family Mengenillidae which are wingless but are free-living and somewhat mobile with legs and small eyes); adult males develop wings, legs, eyes, and antennae, though their mouthparts cannot be used for feeding, but are instead used as sensory structures; the forewings are modified into small club-shaped structures called halteres, which sense gyroscopic information, while the hindwings are fan-shaped with strongly reduced venation; the antennae are flabellate, and are covered in specialised chemoreceptors, likely to detect females over long distances

Diet: nutrients from host insect as larvae; do not feed as adults

Metamorphosis: holometabolous males, hemimetabolous females

Habitat: endoparasites of hymenopterans, orthopterans, mantises, bugs, silverfish, flies and cockroaches; can be found worldwide (except Antarctica), though they are not well-studied

Evolved in: Possibly Permian, but the earliest Strepsipteran fossils are found in the Middle Cretaceous

(source)

Do you have a favorite in Strepsiptera?

One or more of my favorite animals is in Strepsiptera

I love at least one or more of these animals

I like at least one or more of these animals

I am neutral about at least one or more of these animals

I dislike all of these animals

Voting ended onOct 26, 2025

Propaganda under the cut:

Female Strepsipterans spend their entire adult lives under the tergites of their host, with only their the region that was once their head hanging out, releasing pheromones to allow males to find them more easily. Meanwhile, males spend their entire adult lives searching for a female hanging out of the side of a bee, wasp, silverfish, or what-have-you. Adult males usually only live for about 5 hours as adults, and do not feed. Adult female strepsipterans are typically pretty formless, and thus do not have reproductive bits, so males must rupture the cuticle to insert sperm into her body. The eggs will hatch inside the female, and the larvae live freely inside her, eventually eating their way out of her in a process known as haemocoelous viviparity. They emerge from her head, which protrudes from the host’s body, and drop to a plant or the ground to find their own hosts. Follow bestanimal for more Bug Sex Facts.

Larvae have legs and seek out new hosts. The larvae are very active as they only have a limited amount of time to find a host before they exhaust their energy reserves. Once inside the host, they undergo hypermetamorphosis and transform into a less-mobile, legless larval form. They induce the host to produce a bag-like structure inside which they feed and grow. This structure, made from host tissue, protects them from the immune defences of the host. Larvae go through four more instars, and in each moult the older cuticle separates but is not discarded ("apolysis without ecdysis"), so multiple layers form around the larvae. Male larvae pupate after the last moult, but females directly become neotenous adults. The colour and shape of the host's abdomen may be changed and the host usually becomes sterile. Adult males emerge from the host bodies, while females stay inside.

Adult male Strepsipterans have eyes unlike those of any other insect, resembling the eyes found in the trilobite group Phacopina. Instead of a compound eye consisting of hundreds to thousands of ommatidia, that each produce a pixel of the entire image, the strepsipteran eyes consist of only a few dozen "eyelets" that each produce a complete image. These eyelets are separated by cuticle and/or setae, giving the cluster eye as a whole a blackberry-like appearance.

Strepsiptera of the family Myrmecolacidae can influence their host's behaviour, causing their ant hosts to linger on the tips of grass leaves, increasing the chance of being found by strepsipteran males (in the case of females) and putting them in a good position for male emergence (in the case of males). Some Strepsipterans may cause their wasp hosts to desert their colonies. However, they are not known to kill their hosts.

[ginkgobug]

stylops

[have-you-seen-this-animal]

can you do Xenos peckii? it's a species in the order Strepisptera, and not many ppl know about these insects. the entire order is made up of endoparasites that primarily parasitize hymenopterans. the females are neotenic, meaning they do not go thru complete metamorphosis like the males, instead they look like larvae their entire lives.

Excellent request!!!!

Have you seen Xenos peckii?

I have now

Yes, in photos/videos

Yes, irl

I'm not sure

Voting ended onFeb 18

The second photo is of a male.

[marshadellow]

what’s with Clauneck’s relics actually

MORE CLALYCUS BTW FUCK YOU

[photosynthekid]

i wish more ppl knew about strepsiptera. it's such an underrated insect order