Day 204 of showing the internet that (jumping) spiders aren't scary 😮
Mocha really said “plot twist” 😅
We declared her mature… she had a visible epigynum… and then she went and moulted again 😭 #jumpingspider
Mocha really said “plot twist” 😅
We declared her mature… she had a visible epigynum… and then she went and moulted again 😭 #jumpingspider
February 13, 2026 at 9:54 PM
Day 204 of showing the internet that (jumping) spiders aren't scary 😮
Mocha really said “plot twist” 😅
We declared her mature… she had a visible epigynum… and then she went and moulted again 😭 #jumpingspider
Mocha really said “plot twist” 😅
We declared her mature… she had a visible epigynum… and then she went and moulted again 😭 #jumpingspider
Our beautiful Juniper (Phidippus Adumbratus) moulted recently and is looking magnificent 🥹 We're pretty sure she's mature now, but we'll check in a week or so for that signature shiny epigynum. Just look at her monching on her toe beans 😍 #jumpingspider #cute #arachtober
October 25, 2025 at 1:15 PM
Our beautiful Juniper (Phidippus Adumbratus) moulted recently and is looking magnificent 🥹 We're pretty sure she's mature now, but we'll check in a week or so for that signature shiny epigynum. Just look at her monching on her toe beans 😍 #jumpingspider #cute #arachtober
Day 128 of showing the internet that (jumping) spiders aren't scary 😧
Our gorgeous Phidippus adumbratus has just moulted! 🕷️💛 We believe she’s subadult/mature, so in about 1-2 weeks, we’ll check for something called an epigynum 👀🥹 #jumpingspider #cute
Our gorgeous Phidippus adumbratus has just moulted! 🕷️💛 We believe she’s subadult/mature, so in about 1-2 weeks, we’ll check for something called an epigynum 👀🥹 #jumpingspider #cute
October 26, 2025 at 9:34 PM
Day 128 of showing the internet that (jumping) spiders aren't scary 😧
Our gorgeous Phidippus adumbratus has just moulted! 🕷️💛 We believe she’s subadult/mature, so in about 1-2 weeks, we’ll check for something called an epigynum 👀🥹 #jumpingspider #cute
Our gorgeous Phidippus adumbratus has just moulted! 🕷️💛 We believe she’s subadult/mature, so in about 1-2 weeks, we’ll check for something called an epigynum 👀🥹 #jumpingspider #cute
There was a bit of confusion on our last video showing off one of our beautiful female Phidippus Audax Big Bend. Both can be very similar in terms of how they look. However, the one pictured is a confirmed girl by her thin pedipalps at maturity, and the fact she has an epigynum 😁
June 30, 2026 at 1:34 PM
There was a bit of confusion on our last video showing off one of our beautiful female Phidippus Audax Big Bend. Both can be very similar in terms of how they look. However, the one pictured is a confirmed girl by her thin pedipalps at maturity, and the fact she has an epigynum 😁
female true spiders have a sclerotized patch on their ventral abdomen (the epigynum), that couples with the male palp
here, part of the male palp that delivers sperm (the embolus) has broken off. in this case, the embolus is thick & ribbon-like; they are typically much thinner structures
here, part of the male palp that delivers sperm (the embolus) has broken off. in this case, the embolus is thick & ribbon-like; they are typically much thinner structures
October 2, 2026 at 2:04 PM
female true spiders have a sclerotized patch on their ventral abdomen (the epigynum), that couples with the male palp
here, part of the male palp that delivers sperm (the embolus) has broken off. in this case, the embolus is thick & ribbon-like; they are typically much thinner structures
here, part of the male palp that delivers sperm (the embolus) has broken off. in this case, the embolus is thick & ribbon-like; they are typically much thinner structures
I've worked directly this semester with two teams of SDSU undergraduates, imaging SDSU Biodiversity Museum voucher specimens. The students have enjoyed themselves, learning macrophotography & spider morphology
Here's the epigynum of an endemic Cybaeus from the foothills of the CA Sierra Nevada
Here's the epigynum of an endemic Cybaeus from the foothills of the CA Sierra Nevada
April 12, 2025 at 3:09 PM
I've worked directly this semester with two teams of SDSU undergraduates, imaging SDSU Biodiversity Museum voucher specimens. The students have enjoyed themselves, learning macrophotography & spider morphology
Here's the epigynum of an endemic Cybaeus from the foothills of the CA Sierra Nevada
Here's the epigynum of an endemic Cybaeus from the foothills of the CA Sierra Nevada
Pardosa sodalis, a wolf we saw on the arctic tundra along the Dempster highway this summer
November 27, 2024 at 9:33 AM
Pardosa sodalis, a wolf we saw on the arctic tundra along the Dempster highway this summer
I have enough followers now that I can just use bisky instead of google for niche questions. This is way too much power. 😅
Which is to say... Thank you fellow nerds! I hope to return the favor if anyone needs to know about counting epigynum coils in spider genitalia or whatever
Which is to say... Thank you fellow nerds! I hope to return the favor if anyone needs to know about counting epigynum coils in spider genitalia or whatever
April 22, 2025 at 12:10 AM
I have enough followers now that I can just use bisky instead of google for niche questions. This is way too much power. 😅
Which is to say... Thank you fellow nerds! I hope to return the favor if anyone needs to know about counting epigynum coils in spider genitalia or whatever
Which is to say... Thank you fellow nerds! I hope to return the favor if anyone needs to know about counting epigynum coils in spider genitalia or whatever
Epigynum of Iviella newfoundlandensis Pickavance and Dondale 2009, specimen AR-302.101 (paratype)
December 28, 2023 at 2:40 PM
Epigynum of Iviella newfoundlandensis Pickavance and Dondale 2009, specimen AR-302.101 (paratype)
Just a wicked cool ground spider from northern regions, this is Gnaphosa brumalis, found in Makkovik, NL.
January 8, 2025 at 11:37 PM
Just a wicked cool ground spider from northern regions, this is Gnaphosa brumalis, found in Makkovik, NL.
(2/2) When Ember accepts, he carefully flips her over to access her epigynum area. This is where he transfers sperm using his pedipalps, the small limbs near his mouth.
Moments like this remind us that there’s so much beauty and complexity in even the tiniest creatures 🥹
Moments like this remind us that there’s so much beauty and complexity in even the tiniest creatures 🥹
November 13, 2025 at 9:23 PM
(2/2) When Ember accepts, he carefully flips her over to access her epigynum area. This is where he transfers sperm using his pedipalps, the small limbs near his mouth.
Moments like this remind us that there’s so much beauty and complexity in even the tiniest creatures 🥹
Moments like this remind us that there’s so much beauty and complexity in even the tiniest creatures 🥹
At a bioblitz in June, we caught a spider we shouldn't have caught: Paramaevia hobbsae. I say that because not only has this spider never been collected in Indiana before, it's never been found in the Midwest either!
As GB Edwards said when I presented him with this specimen, "Holy smokes!"
As GB Edwards said when I presented him with this specimen, "Holy smokes!"
December 14, 2024 at 2:02 PM
At a bioblitz in June, we caught a spider we shouldn't have caught: Paramaevia hobbsae. I say that because not only has this spider never been collected in Indiana before, it's never been found in the Midwest either!
As GB Edwards said when I presented him with this specimen, "Holy smokes!"
As GB Edwards said when I presented him with this specimen, "Holy smokes!"
RE-DISCOVERY #3
Scotinella pennimani Platnick and Chamé-Vázquez, 2024 (Phrurolithidae) was described just last year from specimens collected in 1967 (58 years ago). We found this lady in Okefenokee NWR on Trembling Earth Nature Trail just north of Stephen C. Foster State Park in SE Georgia.
Scotinella pennimani Platnick and Chamé-Vázquez, 2024 (Phrurolithidae) was described just last year from specimens collected in 1967 (58 years ago). We found this lady in Okefenokee NWR on Trembling Earth Nature Trail just north of Stephen C. Foster State Park in SE Georgia.
December 2, 2025 at 5:47 PM
RE-DISCOVERY #3
Scotinella pennimani Platnick and Chamé-Vázquez, 2024 (Phrurolithidae) was described just last year from specimens collected in 1967 (58 years ago). We found this lady in Okefenokee NWR on Trembling Earth Nature Trail just north of Stephen C. Foster State Park in SE Georgia.
Scotinella pennimani Platnick and Chamé-Vázquez, 2024 (Phrurolithidae) was described just last year from specimens collected in 1967 (58 years ago). We found this lady in Okefenokee NWR on Trembling Earth Nature Trail just north of Stephen C. Foster State Park in SE Georgia.
Habitus, epigynum, and vulva of Alopecosa pictilis, a gorgeous wolf spider from coastal Labrador.
January 3, 2024 at 11:33 PM
Habitus, epigynum, and vulva of Alopecosa pictilis, a gorgeous wolf spider from coastal Labrador.
Synageles venator epigynum and vulva at 20 X
January 1, 2024 at 9:16 PM
Synageles venator epigynum and vulva at 20 X
Darkfield and brightfield images of Trochosa epigyna and vulvae. Alright, it is just from one spider, so epigynum and vulva.
March 23, 2024 at 11:47 PM
Darkfield and brightfield images of Trochosa epigyna and vulvae. Alright, it is just from one spider, so epigynum and vulva.
Almost....
The sperm is not transferred directly, but rather is first deposited on a small web and then taken up by the pedipalps.
During mating, the male spider inserts his pedipalp into the female's epigynum (the female reproductive opening).
The sperm is not transferred directly, but rather is first deposited on a small web and then taken up by the pedipalps.
During mating, the male spider inserts his pedipalp into the female's epigynum (the female reproductive opening).
June 14, 2025 at 10:39 PM
Almost....
The sperm is not transferred directly, but rather is first deposited on a small web and then taken up by the pedipalps.
During mating, the male spider inserts his pedipalp into the female's epigynum (the female reproductive opening).
The sperm is not transferred directly, but rather is first deposited on a small web and then taken up by the pedipalps.
During mating, the male spider inserts his pedipalp into the female's epigynum (the female reproductive opening).
Sean’s new hobby is photographing spider genitalia. Check out the fruits of his labour on spider onlyfans here: www.inaturalist.org/projects/spi...
January 18, 2024 at 11:12 AM
Sean’s new hobby is photographing spider genitalia. Check out the fruits of his labour on spider onlyfans here: www.inaturalist.org/projects/spi...
Thelcticopis hercules Pocock, 1901. Epigynum. Type. NHM, London. c. 1983.
January 31, 2025 at 7:02 PM
Thelcticopis hercules Pocock, 1901. Epigynum. Type. NHM, London. c. 1983.
NASPA Word of the Day: EPIGYNE n an epigynum. Hook:epigyneS. Typos:epigene epigone epigyna epigyny. https://scrabbleplayers.org/cgi-bin/wotd.pl
January 13, 2025 at 1:55 PM
NASPA Word of the Day: EPIGYNE n an epigynum. Hook:epigyneS. Typos:epigene epigone epigyna epigyny. https://scrabbleplayers.org/cgi-bin/wotd.pl
Can anyone identify the object on the ventral midline posterior of the epigynum? I'm not sure if it's anatomy or something else like a parasite.
August 5, 2025 at 11:33 PM
Can anyone identify the object on the ventral midline posterior of the epigynum? I'm not sure if it's anatomy or something else like a parasite.
Wow! Fantastic epigynum photos
November 27, 2024 at 10:05 PM
Wow! Fantastic epigynum photos
Wow! "Centromerus" perhaps? That epigynum is wild.
November 12, 2025 at 5:51 PM
Wow! "Centromerus" perhaps? That epigynum is wild.