#Tenaculum

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@getnews-me.bsky.social

5 months ago

Ghost Sharks Grow Forehead Teeth to Aid Mating, Study Finds

Male ghost sharks have a tenaculum with rows of true teeth used to grip females during mating; the feature appears in 315‑million‑year‑old fossils and shares tooth‑specific genes with oral teeth. getnews.me/ghost-sharks-grow-forehe... #sharks #tenaculum

GetNews.me

@getnews-me.bsky.social

5 months ago

Ghost Sharks’ Forehead Teeth Evolved for Deep‑Sea Mating

Male ghost sharks have a forehead stalk called a tenaculum with teeth that grip a female’s pectoral fins during mating; fossils show a 315 million‑year‑old ancestor with this structure. Read more: getnews.me/ghost-sharks-forehead-te... #ghostshark #tenaculum

@pebblepupanna.bsky.social

6 months ago

#toothy #Tenaculum #Spotted #Ratfish 🫨🦷👀

praying mantis

@gentlem.bsky.social

6 months ago

'Ghost sharks' are lurking off the coast of Washington – and they have teeth growing out of their foreheads | Discover Wildlife Researchers have discovered that the bizarre-looking spotted ratfish has a row of real teeth between its eyes.

www.discoverwildlife.com/animal-facts...
#spotted-ratfish
#ghost-sharks
#tenaculum
“…these fishes coopted a preexisting program for manufacturing teeth to make a new device that is essential for reproduction”

Rian Nejar 🦋

@riannejar.bsky.social

6 months ago

Behold the Gloriously Weird Spotted Ratfish. It Has Teeth on Its Forehead for Sex Researchers have finally traced the origin of the spotted ratfish’s bizarre forehead teeth, which are used for mating

A toothy Tenaculum of the Spotted Ratfish holds on for sex [via @sciam.bsky.social] 🧪👩‍🔬🐟🦷 🧉

“This insane [] feature flips the long-standing assumption in evolutionary #biology that teeth are strictly oral structures”

www.scientificamerican.com/article/this...

#spotted #ratfish #tenaculum #teeth

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@getnews-me.bsky.social

6 months ago

Forehead Teeth in Ratfish Reveal Evolution of Vertebrate Teeth

Male spotted ratfish grow a row of hooked teeth on a forehead structure called a tenaculum, expressing shh, bmp4 and runx2 genes as oral teeth. The finding was published in PNAS. getnews.me/forehead-teeth-in-ratfis... #ratfish #tenaculum #toothevolution