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Dan Killam

@dantheclamman.blog

Eclamgelist. He/him If you like #clamFacts check out my blog (profile name)

created April 27, 2023

1,326 followers 958 following 1,824 posts

view profile on Bluesky

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Profile picture Dan Killam (@dantheclamman.blog) reply parent

Hehe fortunately I care not about the clout, only about spreading the clam gospel

10/9/2025, 5:33:01 PM | 0 0 | View on Bluesky | view

Profile picture Dan Killam (@dantheclamman.blog)

When the top post in your clam fact thread is actually about a snail

Pablo Escobar thinking hard about stuff in several poses
10/9/2025, 4:22:32 PM | 8 0 | View on Bluesky | view

Profile picture Dan Killam (@dantheclamman.blog) reply parent

Darwin was a geologist first. He realized he needed to investigate mechanisms driving the history of life to be able to be able to explain his geological observations

10/9/2025, 3:27:57 PM | 1 0 | View on Bluesky | view

Profile picture Dan Killam (@dantheclamman.blog) reply parent

Hehe clam adjacent. I've long been fascinated by Julia snails, maybe I'll write a blog!

10/9/2025, 3:20:50 PM | 2 0 | View on Bluesky | view

Profile picture Dan Killam (@dantheclamman.blog) reply parent

The amazing clearance rate of freshwater mussels does leave them vulnerable though. When pulses of sediment passes through, such as from wildfire-linked erosion, their gills are easily overwhelmed by the particles, smothering them californiawaterblog.com/2023/02/26/w... (243)

Fig from CA Water Blog showing a muss at its normal life position in a healthy stream with fish and vegetation, vs a mussel smothered by a layer of sediment in a burned out landscape
10/9/2025, 3:19:38 PM | 1 0 | View on Bluesky | view

Profile picture Stanton (@stanton.bsky.social) reposted reply parent

Clam shrimps are actually several orders of branchiopod crustaceans: they were thought to be one order until genomic comparisons showed some subgroups were more closely related to the water fleas than to others, thus necessitating the group to be split up.

10/9/2025, 3:32:27 AM | 1 1 | View on Bluesky | view

Profile picture Dan Killam (@dantheclamman.blog) reply parent

Ah yeah, I was definitely not referring to them as a formal phyletic group! Even more convergence towards clams!

10/9/2025, 3:34:08 AM | 1 0 | View on Bluesky | view

Profile picture Dan Killam (@dantheclamman.blog) reply parent

Freshwater mussels (Unionidae) are important to ensure water quality in rivers! Each mussel can clear up to 2-4 L per hour depending on species! These clearance rates can go up as flow levels increase. Unionids are champions at grabbing particles from moving water! (242) youtu.be/s_CaNfFtHhg?...

10/9/2025, 2:53:02 AM | 13 1 | View on Bluesky | view

Profile picture Dan Killam (@dantheclamman.blog) reply parent

We got a good set of options to mix and match: flesh tube, crab, clam. Maybe all the above.

10/9/2025, 12:45:21 AM | 4 0 | View on Bluesky | view

Profile picture Dan Killam (@dantheclamman.blog) reply parent

Also not clams but fellow travelers: clam shrimp! An ancient group, with species inhabiting extreme environments like vernal pools where they wait for months drying out, freezing, and exposed to extreme salinity. I enjoyed seeing these California clam shrimp at Jepson Prairie. (241)

10/9/2025, 12:15:49 AM | 91 20 | View on Bluesky | view

Profile picture David Bapst (@dwbapst.bsky.social) reposted reply parent

On the subject of clams and crabs a student asked me whether bivalved arthropods have evolved more times than ‘crabs’ recently

10/9/2025, 12:05:30 AM | 2 1 | View on Bluesky | view

Profile picture Dan Killam (@dantheclamman.blog) reply parent

9/9/2025, 10:01:41 PM | 2 0 | View on Bluesky | view

Profile picture Peter Wagner (a Real Dr., not a surgeon-barber/body-tech/golfer) (@peterjwagner3.bsky.social) reposted reply parent

Alas! They were destroyed in an interstellar war against 22 planets that independently evolved sentient crabs.

9/9/2025, 9:22:11 PM | 6 2 | View on Bluesky | view

Profile picture Dan Killam (@dantheclamman.blog) reply parent

Another not-clam fact: Juliidae snails have a hinged shell like clams, entirely by convergent evolution! For ~100 yrs they were only known from fossils and assumed to be clams! The commonality of the hinged form makes me hope there are clamlike aliens out there, waiting to make 1st contact (240)

A Julia snail. It is vivid green from stolen chloroplasts and is clearly a snail but absurdly poking out of what looks like a clam shell Another view of a Julia snail. This one has beautiful streaks of white along the valves
9/9/2025, 9:10:00 PM | 274 76 | View on Bluesky | view

Profile picture Dan Killam (@dantheclamman.blog) reply parent

Not all things with a hinged two-part shell are bivalves! There are, for example, brachiopods, which are not closely related! One way to tell them apart is from their axis of symmetry. For bivalves it is between the valves, while brachs are symmetrical top down! (239)

Schematic by Jaleigh Pier, shows a distinction between brachs and bivalves. Bivalves have two valves that are mirrored, while brach's are mirrored through the valves!
9/9/2025, 9:05:45 PM | 12 3 | View on Bluesky | view

Profile picture Natural History Collections and Museomics (@nhcm.pensoft.net) reposted

Freshwater mussel larvae in museum collections offer untapped insights for taxonomy and conservation: doi.org/10.3897/nhcm...

3/9/2025, 6:37:57 AM | 9 3 | View on Bluesky | view

Profile picture Dr. Karly E. Cohen (@karlycohen.bsky.social) reposted

New paper is officially out! Ratfish have a second jaw on their foreheads - CT + histology show they’re real teeth, built from the same tissues and signals as oral teeth. www.washington.edu/news/2025/09...

4/9/2025, 7:01:17 PM | 171 59 | View on Bluesky | view

Profile picture Dan Killam (@dantheclamman.blog) reply parent

Class Bivalvia was named by Linnaeus! In 19th-20th centuries it was in vogue to call them "pelecypods" ("axe-foot"), in line with the foot obsession of biology, and bc other groups like brachiopods have 2 valves also. In 1969, scientists put their foot down and brought back the better name! (238)

9/9/2025, 4:12:04 PM | 4 0 | View on Bluesky | view

Profile picture Dr. Brendan Anderson (@fossilsndcoffee.bsky.social) reposted reply parent

🎵ha! You don't even know what you're asking me to clam-fess🎵

Magic the gathering un-set card of Alexander Clamilton, a Clamfolk Advisor Rebel. 2 and Blue 0/4
9/9/2025, 12:12:50 AM | 4 1 | View on Bluesky | view

Profile picture Dan Killam (@dantheclamman.blog) reply parent

I posted a fact about disco clams in this thread earlier. They reflect light in a flashing display by rapidly switching the direction of silica nanospheres in the lips of their mantle! Research suggests it's to psych out predators! (237) youtu.be/GRzeNlqnRxU?...

8/9/2025, 11:15:53 PM | 11 2 | View on Bluesky | view

Profile picture Trevor A. Branch (@trevorabranch.bsky.social) reposted

IT'S ADORABLE! New fish species just dropped: the bumpy snailfish at 10,000 ft down in the ocean gift link: www.nytimes.com/2025/09/08/s...

image
8/9/2025, 7:22:01 PM | 432 126 | View on Bluesky | view

Profile picture Dan Killam (@dantheclamman.blog) reply parent

The bigger the list, the higher the score

8/9/2025, 8:24:17 PM | 3 0 | View on Bluesky | view

Profile picture Dan Killam (@dantheclamman.blog)

Pack the damn court

8/9/2025, 8:21:48 PM | 2 0 | View on Bluesky | view

Profile picture Dan Killam (@dantheclamman.blog) reply parent

We'll find out more about his opinion on FSA through upcoming rulings on enforcement of abortion restrictions across state lines

8/9/2025, 8:21:26 PM | 0 0 | View on Bluesky | view

Profile picture Dan Killam (@dantheclamman.blog) reply parent

textualism was always a smokescreen. they don't give a shit as long as they get their way

8/9/2025, 7:50:58 PM | 1 0 | View on Bluesky | view

Profile picture Dan Killam (@dantheclamman.blog) reply parent

Ha! You probably thought I was done with clam facts! Fat chance! The rear, highest point of a shell is called the umbo. It often includes the beak, which is the oldest part of the shell, originating back to the larval growth of the clam that all growth lines of the shell point back to! (236)

The umbo of a Mercenaria mercenaria shell, from Wikipedia. Radial growth lines point back to a beak that protrudes past the hinge line
8/9/2025, 6:14:15 PM | 19 0 | View on Bluesky | view

Profile picture Dan Killam (@dantheclamman.blog) reply parent

His idea of "success" is for who he classifies as sick and weak to die off. He is a eugenicist

8/9/2025, 3:14:46 PM | 1 0 | View on Bluesky | view

Profile picture Dan Killam (@dantheclamman.blog) reply parent

Probably had an LLM write it up

6/9/2025, 5:21:08 AM | 0 0 | View on Bluesky | view

Profile picture Dan Killam (@dantheclamman.blog) reply parent

I see way more people with a couple thousand followers. With twitter it felt super bimodal: less than a couple hundred or >100,000

6/9/2025, 5:16:17 AM | 2 0 | View on Bluesky | view

Profile picture Dan Killam (@dantheclamman.blog) reply parent

He needs you to come back to his preferred right wing network to debate him. As with all reactionaries, he can only react and has no original ideas. He starves without them

5/9/2025, 11:40:06 PM | 0 0 | View on Bluesky | view

Profile picture Dan Killam (@dantheclamman.blog) reply parent

I think he also knows what he's doing is wrong. He is working in very bad faith, knows people's lives are on the line and actually wants them to die because he sees them as eugenically disposable. I will vote for any Democrat who pledges to open a criminal investigation of his actions

5/9/2025, 11:32:56 PM | 0 0 | View on Bluesky | view

Profile picture Dan Killam (@dantheclamman.blog) reply parent

I agree. And Camacho promoted a more rigorous electrolyte-focused health policy

5/9/2025, 10:50:18 PM | 5 0 | View on Bluesky | view

Profile picture Dan Killam (@dantheclamman.blog) reply parent

Dude should be in jail

5/9/2025, 10:48:38 PM | 1 0 | View on Bluesky | view

Profile picture Dan Killam (@dantheclamman.blog) reply parent

Gotta hand it to him, he had the smart but evil choice in his hand and he stuck with making dumb choices

5/9/2025, 10:45:56 PM | 1 0 | View on Bluesky | view

Profile picture Dan Killam (@dantheclamman.blog) reply parent

The guy really sucks. Ask CA state employees about their opinion of their boss. I'd vote for literally any other Democrat

5/9/2025, 10:43:26 PM | 3 0 | View on Bluesky | view

Profile picture Dan Killam (@dantheclamman.blog) reply parent

the french knight from Monty python and the holy grail exclaiming Your mother was a hamster and your anus is poorly armored
5/9/2025, 8:57:03 PM | 5 0 | View on Bluesky | view

Profile picture Chris Mah (@echinoblog.bsky.social) reposted

Sometimes I think it is necessary to remind everyone about the diversity of echinoderm ANUSES! this fossil crinoid with its well armed ANAL CHIMNEY for example!! #echinoday echinoblog.blogspot.com/2016/04/the-...

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5/9/2025, 7:12:32 PM | 68 13 | View on Bluesky | view

Profile picture Dan Killam (@dantheclamman.blog) reply parent

I feel a kind of joy at Legacy Centrist Media feeling such anger at us posting over here and not complying with their directives to post on the Ketamine Nazi AI Training Machine

5/9/2025, 7:02:10 PM | 1 0 | View on Bluesky | view

Profile picture Anthony (Tony) J. Martin (@ichnologist.bsky.social) reposted

For #FossilFriday, a 2-for-1 special with a Late Cretaceous body fossil (ammonite) bearing tooth traces of a biting mosasaur matching the dental records of _Platecarpus_. Display seen at the U. of Michigan Museum of Natural History (Ann Arbor MI) in June '24. 🧪🦷🕳️ #ichnology

Large (about 30 centimeters/12 inches wide) ammonite fossil in a display case, roundish from incompletely preserved spiraling of its chambers and mostly copper-brown but a little iridescent from
5/9/2025, 2:13:46 PM | 87 34 | View on Bluesky | view

Profile picture Dan Killam (@dantheclamman.blog) reply parent

Carnivorous bivalves often live in places where tasty phytoplankton is in short supply. They've evolved to eat larger prey like copepods by feeling them out with their tentacles and engulfing them with their siphon, like some sort of sci-fi predator! (235)

Figure from Norton 1981 showing a poromyid clam extending its giant hoodlike siphon to engulf a hapless, oblivious copepod
4/9/2025, 10:55:38 PM | 24 4 | View on Bluesky | view

Profile picture Dan Killam (@dantheclamman.blog) reply parent

Clams are just cool af. It's a fact. (234)

4/9/2025, 10:47:07 PM | 10 2 | View on Bluesky | view

Profile picture Dan Killam (@dantheclamman.blog) reply parent

Dude needs to be jailed for what he's done

4/9/2025, 9:32:11 PM | 0 0 | View on Bluesky | view

Profile picture Alex Spahn 🌋🌪️☄️ (@spahn711.bsky.social) reposted

#TeamCalcite always and forever. Here's a small taste of calcite's beauty with a look at my personal calcite collection.

4/9/2025, 7:09:18 PM | 164 23 | View on Bluesky | view

Profile picture Dan Killam (@dantheclamman.blog) reply parent

Honestly I find myself worried our information system is so screwed up that there will be no swing back up in some demos. In Texas they were calling it God's will when kids were dying of measles. I hope I'm wrong

4/9/2025, 9:02:13 PM | 1 0 | View on Bluesky | view

Profile picture Laiken Jordahl (@laikenjordahl.bsky.social) reposted

Survey stakes are in the ground at the San Rafael Valley, where DHS is preparing to wall off the last best corridor in Arizona for jaguars, ocelots & other species. Not a soul in sight.

4/9/2025, 5:40:10 PM | 341 191 | View on Bluesky | view

Profile picture Dan Killam (@dantheclamman.blog) reply parent

I am a lifelong black coffee drinker and find it not at all connected to my sexuality or gender. Just absolute nonsense. Anyone who claims so needs to grow up, jfc

4/9/2025, 6:33:17 PM | 1 0 | View on Bluesky | view

Profile picture Dan Killam (@dantheclamman.blog) reply parent

I really hate this stuff. As a kid, so much of the policing about what was permissible male behavior or not came as jokes. I wish I could go back and tell little Dan not to listen to them, and just enjoy what I wanted to enjoy

4/9/2025, 6:28:02 PM | 33 0 | View on Bluesky | view

Profile picture Dan Killam (@dantheclamman.blog) reply parent

Aligns a lot with climate denial strategies. And tobacco denial. They can always demand more data

4/9/2025, 5:31:44 PM | 9 0 | View on Bluesky | view

Profile picture Dan Killam (@dantheclamman.blog) reply parent

Sacred power to keep out the poors

4/9/2025, 5:28:28 PM | 8 0 | View on Bluesky | view

Profile picture Dan Killam (@dantheclamman.blog) reply parent

If we ever regain power, we should be charging him with crimes regarding every vaccine preventable death on his watch. He needs to be punished

4/9/2025, 5:25:24 PM | 3 0 | View on Bluesky | view

Profile picture Dan Killam (@dantheclamman.blog) reply parent

Nacre (mother of pearl) isn't stable chemically, so fossils with nacre are less common! But in the right conditions we can find pearl fossils, often replaced with calcite like this big pearl from a Cretaceous inoceramid clam, half the size of a golf ball! (233) oceansofkansas.com/Inoceramids....

a view of a pearl about 5 cm across, from Pseudostrea congesta. the calcite is dull brown, semi-transparent. despite the recrystallization, radial growth lines in the pearl can still be seen! Photos by Mike Everhart cross section of another pearl about half a cm across, showing the radial growth lines
4/9/2025, 5:04:21 PM | 8 0 | View on Bluesky | view

Profile picture Dan Killam (@dantheclamman.blog) reply parent

Yes aragonite is actually my favorite but it usually doesn't make the bracket...not sure why!

4/9/2025, 3:57:05 PM | 1 0 | View on Bluesky | view

Profile picture Dan Killam (@dantheclamman.blog)

If you love clams you gotta vote for calcite! Mussels, scallops, oysters and other bivalve greatest hits all use calcite for their shells!

4/9/2025, 3:08:10 PM | 14 1 | View on Bluesky | view

Profile picture Dan Killam (@dantheclamman.blog) reply parent

"Clams" being slang for money came from misunderstanding of Native shell-based goods like wampum, which were more for cultural exchange and memory. However, shells have literally been used as money, such as these Pismo clams during the Great Depression hakaimagazine.com/article-shor... (232)

4/9/2025, 12:18:13 AM | 16 1 | View on Bluesky | view

Profile picture Dan Killam (@dantheclamman.blog) reply parent

Many hermit crabs are adapted to live in gastropod shells, but Porcellanopagurus nihonkaiensis is adapted to use bivalve shells as its home! Adapting to use flat clam shells as a shield means less armor, but frees it from the intense competition sometimes seen for empty snail shells! (231)

Pic by Vin Izuzuki of P. nihonkaiensis with a small bivalve shell on its back. It is a small red crab with a particularly oversized pincher claw Fig from Yoshikawa et al 2018 showing P. nihonkaiensis selecting a bivalve shell, which it inspects and then flips to its back where it is held in place by a pair of rear legs
3/9/2025, 4:59:10 PM | 8 1 | View on Bluesky | view

Profile picture PJ Harvey Dent (@bsakat.bsky.social) reposted

I used to run into these little assholes all the time when I was cooking for a living. You get them (or one of their relatives) in oysters and clams, so when you shuck enough oysters for a dinner service you get a collection of tiny crabs in your work station.

3/9/2025, 1:34:35 PM | 13 1 | View on Bluesky | view

Profile picture Dan Killam (@dantheclamman.blog)

We had just driven through here a couple weeks ago on the way to Yosemite and read about its history. Eerie that most of it is now gone

3/9/2025, 5:18:56 AM | 4 0 | View on Bluesky | view

Profile picture Dan Killam (@dantheclamman.blog) reply parent

In the intertidal, mussels have to survive greater temperature ranges than other bivalves, having been observed to live through brief periods ranging from -10 to 40 °C (14-104 F)! They protect themselves by releasing heat shock proteins to slow denaturing of their proteins (230)

3/9/2025, 3:38:13 AM | 8 0 | View on Bluesky | view

Profile picture Tessa Hill (@tessahill.bsky.social) reposted

Proud to say I contributed to this effort to simply tell the truth to the American public.

2/9/2025, 10:10:57 PM | 57 14 | View on Bluesky | view

Profile picture Dan Killam (@dantheclamman.blog)

If someone cannot mentally grasp the data, and wouldn't want to accept the data if they could understand it, what's a scientist to do?

2/9/2025, 10:11:16 PM | 0 0 | View on Bluesky | view

Profile picture Dan Killam (@dantheclamman.blog) reply parent

I think honestly that they know the game has changed, and they're angling to be the captive opposition

2/9/2025, 8:50:20 PM | 6 0 | View on Bluesky | view

Profile picture Dan Killam (@dantheclamman.blog) reply parent

When clams are buried, they will frantically try to dig to reach the surface. Their digging leaves impressions, creating trace fossils called "Lockeia" which are marks of ancient storm deposits and of clams being buried alive! Spooky! (229) woostergeologists.scotblogs.wooster.edu/2017/04/07/w...

Picture from Mark Wilson of Cretaceous Lockeia trace fossils. They look like a bunch of cookies poking out of a rock wall, with patterns indicating the clams' digging activity
2/9/2025, 8:41:37 PM | 14 2 | View on Bluesky | view

Profile picture Dan Killam (@dantheclamman.blog) reply parent

Another key service of clams is bioturbation. If left undisturbed, sediments will trap nutrients and become inhospitable deeper down for many types of life, due to lack of oxygen. When clams dig down and "rework" that dirt, they bring oxygen down and free nutrients from below! (228)

Pic from Norkko and Shumway 2011, showing how sediment without bioturbation becomes stratified, with low-oxygen conditions leading to layers of dark sediment. Meanwhile the clams worked on sediment on the right, meaning no dark strata and a bunch of well-mixed tongues of sediment following their burrows.
2/9/2025, 5:37:41 PM | 9 0 | View on Bluesky | view

Profile picture Dan Killam (@dantheclamman.blog) reply parent

Omg, a post thread as a byssus, genius

2/9/2025, 4:41:14 PM | 3 0 | View on Bluesky | view

Profile picture Dan Killam (@dantheclamman.blog) reply parent

Imagining being this guy's dive buddy lol

2/9/2025, 4:17:08 PM | 0 0 | View on Bluesky | view

Profile picture Dan Killam (@dantheclamman.blog) reply parent

The production of pseudofeces is considered a major ecosystem service of bivalves. They are clearing the water column, producing sediment which decomposes and releases nutrients. Meanwhile the clearer water has greater supply of light to fuel phytoplankton growth from those nutrients! (227)

2/9/2025, 3:31:46 PM | 7 1 | View on Bluesky | view

Profile picture Dan Killam (@dantheclamman.blog) reply parent

Clams of course produce poop from digested material, but they also produce pseudofeces from all the stuff picked up by their gills that they don't eat. The pseudofeces is packaged up in mucus. Both the poop and not-poop are shot out the siphon when the clam claps its valves together! (226)

Fig from Galimany et al 2018 showing an eastern ribbed mussel and comparing its feces and pseudofeces. The pseudofeces is generally more diffuse than the actual poops. A bright green poop is the result of being fed a monoculture of green algae Tetraselmis, while the brown poop is a mix of particles from seawater
2/9/2025, 3:25:05 PM | 11 1 | View on Bluesky | view

Profile picture Marijke Puts (@marijkeputs.bsky.social) reposted reply parent

Periclimenes imperator lives mostly on the outside of its host, but sometimes it inquilinises the sea cucumber's butt. A guy was nice enough to capture all the butts for your reference: www.flickr.com/photos/pacif... Enjoy!

2/9/2025, 12:24:40 PM | 10 4 | View on Bluesky | view

Profile picture Dan Killam (@dantheclamman.blog) reply parent

It is a free extra delicacy, often eaten whole!

2/9/2025, 6:13:58 AM | 1 0 | View on Bluesky | view

Profile picture Dan Killam (@dantheclamman.blog) reply parent

Pea crabs are common kleptoparasites in many bivalve species, including mussels, living in the gill cavity and picking away at the mussel's hard-earned food. Research has shown that mussels hosting pea crabs grow more slowly and show signs of stress compared to those without (225)

A small pale colored crab in the gill cavity of an opened blue Mytilus mussel. French fries are in the background
2/9/2025, 4:30:48 AM | 70 10 | View on Bluesky | view

Profile picture Dan Killam (@dantheclamman.blog) reply parent

I hope he can be jailed for what he's done

1/9/2025, 5:08:57 PM | 0 0 | View on Bluesky | view

Profile picture Dan Killam (@dantheclamman.blog) reply parent

Same genus! Sounds like a nice adaptation for rafting

1/9/2025, 6:31:03 AM | 1 0 | View on Bluesky | view

Profile picture Paolo G. Albano (@pgalbano.bsky.social) reposted reply parent

Interesting! It's the same behaviour of the usually rock-boring Mediterranean Rocellaria dubia when it settles on shells on soft substrates.

1/9/2025, 6:28:21 AM | 4 1 | View on Bluesky | view

Profile picture Dan Killam (@dantheclamman.blog) reply parent

When an organism lives inside another organism, it is called inquilinism. Modern giant clams have shrimp specially adapted to live in their gill cavity. @paleoadiel.bsky.social and colleagues described inquiline shrimp in the body cavity of giant Cretaceous inoceramid bivalves! (224)

Deman's giant-clam shrimp, photo by Anna Deloach. Thhe shrimp is covered in fine black polka dots. The clam's gill filaments are visible to the left Figure from Bicknell et al 2021 showing an internal fossil mold of a large clam ,several cm across, and small shrimp exoskeletons visible inside. A close up view of the shrimp is to the right
1/9/2025, 3:17:44 AM | 26 7 | View on Bluesky | view

Profile picture Dan Killam (@dantheclamman.blog) reply parent

Yes, the trash cans of the dinosaur seas, lol

Smithsonian reconstruction of elevator rudists now they might have looked in life
1/9/2025, 2:47:02 AM | 2 0 | View on Bluesky | view

Profile picture Dan Killam (@dantheclamman.blog) reply parent

Yes, rudist paleoecology is fascinating. Sometimes they were building reefs, sometimes looking more like sediment-supporting oysters, sometimes patch reefs interspersed with corals as @rowanmartindale.bsky.social has described! pubs.geoscienceworld.org/sepm/palaios...

1/9/2025, 2:07:38 AM | 2 1 | View on Bluesky | view

Profile picture Dan Killam (@dantheclamman.blog) reply parent

Can these people be criminally charged if there is a change of power in 2029? What's the statute of limitations on willfully violating a judge's order?

31/8/2025, 10:01:59 PM | 1 0 | View on Bluesky | view

Profile picture Dan Killam (@dantheclamman.blog) reply parent

Yo dawg we heard you like shells...the Stimpson chimney clam is a shell in a shell. These little bivalves bore into loose shells, building little chimneys of cemented shell fragments once they grow past the thickness of their host shell. (223)

Photo by the legendary José Leal, Bailey Matthews Shell Museum. Chimney clams poke out of a sand dollar like little white chimneys Photo from jaxshells.org. a chimney clam chimney coming out of a gastropod shell features many little cemented shelly fragments An ark shell has many borings, and inside some little igloo like housings can be seen
31/8/2025, 9:23:36 PM | 30 7 | View on Bluesky | view

Profile picture Dan Killam (@dantheclamman.blog) reply parent

If I were to go back in time to see one clam, it would be my dream to go back to the Cretaceous and see Titanosarcolites, a rudist bivalve that grew like giant 2 m wide croissants! (222)

Two sandaled feet next to a meter wide Titanosarcolites fossil, looking like a giant curly parenthesis or croissant Artists depiction of a rudist reef featuring trash can like elevator rudists among the reclining croissant like Titanosarcolites, all on the bottom of a shallow tropical ocean
31/8/2025, 4:11:37 PM | 98 15 | View on Bluesky | view

Profile picture Katie Collins (@spissatella.bsky.social) reposted reply parent

(:) (:) (:) :D :D :D

31/8/2025, 3:16:25 PM | 0 1 | View on Bluesky | view

Profile picture Dan Killam (@dantheclamman.blog) reply parent

Hehe yep!

31/8/2025, 3:15:19 PM | 1 0 | View on Bluesky | view

Profile picture Dan Killam (@dantheclamman.blog) reply parent

Aw thank you! (:)

31/8/2025, 3:13:47 PM | 1 0 | View on Bluesky | view

Profile picture Dan Killam (@dantheclamman.blog) reply parent

Thorny oysters (Spondylus) grow their spines at up to 1 mm per day. While thr spines provide some limited deterrence against predators, they are thought to be more effective at recruiting other organisms to live on the shell and provide camouflage! (221)

A thorny oyster shell. The orange main body of the shell is studded with thin spiny projections
31/8/2025, 7:19:41 AM | 17 1 | View on Bluesky | view

Profile picture Katie Collins (@spissatella.bsky.social) reposted

Boring bivalves are the best and also I now have a colleague who makes the "I thought they were all boring" joke every single time he sees me 😂😭🙄

31/8/2025, 5:20:54 AM | 18 1 | View on Bluesky | view

Profile picture Dan Killam (@dantheclamman.blog) reply parent

Boring bivalves are actually quite interesting! The ability to bore into rock has evolved multiple times in bivalves. @spissatella.bsky.social found that boring bivalves have a greater variety of forms than their non-boring counterparts! (220)

3d scans of different boring bivalves! They are quite varied in forms. One irregular and ornamented, one oblong, one circular with a conical appendage
31/8/2025, 4:28:00 AM | 22 3 | View on Bluesky | view

Profile picture Dan Killam (@dantheclamman.blog) reply parent

The place the adductor muscle attaches to the shell is analogous to our tendons, and usually leaves a visible scar on the shell, which is sometimes pigmented! Some species have two points of attachment, and some just one. (219)

A picture of a Eastern oyster shell. It is craggy and with signs of algae on the outside, smooth and pearly on the inside, with a deep almost black adductor muscle scar. Photo from Bailey Matthews Shell Museum Schematic of three types of bivalve as. Isomyarian have two identical scars. Anisomyarian have one scar larger than the other, like a mussel. Monomyarian means one point of attachment, like a scallop
31/8/2025, 3:45:35 AM | 7 0 | View on Bluesky | view

Profile picture Dan Killam (@dantheclamman.blog) reply parent

Giant clams make a growth line every day, controlled by their partnership with photosynthetic algae. @nielsjdewinter.bsky.social found daily chemical patterns in the shells of Cretaceous rudist bivalves, suggesting they too may have harbored algae! (218)

A cross section of a fossil rudist bivalve shell. Views of different daily growth lines are visible
31/8/2025, 3:27:23 AM | 9 1 | View on Bluesky | view

Profile picture Dan Killam (@dantheclamman.blog) reply parent

Darwin Award

31/8/2025, 12:04:22 AM | 0 0 | View on Bluesky | view

Profile picture Dan Killam (@dantheclamman.blog) reply parent

journals.biologists.com/jeb/article/...

30/8/2025, 10:30:38 PM | 0 0 | View on Bluesky | view

Profile picture Dan Killam (@dantheclamman.blog) reply parent

Wow interesting! If I ever pass through Olympia you know where I'll be stopping to buy merch

30/8/2025, 4:58:24 PM | 1 0 | View on Bluesky | view

Profile picture Dan Killam (@dantheclamman.blog) reply parent

Some nice scicomm on their website! www.evergreen.edu/student-life...

30/8/2025, 4:49:48 PM | 1 0 | View on Bluesky | view

Profile picture Dan Killam (@dantheclamman.blog) reply parent

On the internet, no one knows you're a dog!

30/8/2025, 4:46:35 PM | 4 0 | View on Bluesky | view

Profile picture Dan Killam (@dantheclamman.blog) reply parent

When a clam's shell is fractured, it immediately begins patching the crack. This is often done with a different mineral material called vaterite, which is quick and cheap to make. In one study with mussels they found the repaired shell was actually stronger than it was before the crack! (217)

Figure from Dooley and Taylor 2017 showing a clam with a strong central fracture to the shell, which inside has been patched by an irregular area of carbonate
30/8/2025, 4:34:52 PM | 7 0 | View on Bluesky | view

Profile picture MalcomJ (Who?/Me?)🇺🇲🇬🇧🇨🇦 (@malcomj.bsky.social) reposted reply parent

Happy as a Quahog with a six pack of 'Gansett.

image
29/8/2025, 5:54:15 PM | 2 1 | View on Bluesky | view

Profile picture Dan Killam (@dantheclamman.blog) reply parent

There is not enough clam-related content in the world. My life's work is to change that

29/8/2025, 5:51:32 PM | 7 1 | View on Bluesky | view

Profile picture Dan Killam (@dantheclamman.blog) reply parent

the guy must be charged and prosecuted if we ever regain power

29/8/2025, 5:29:50 PM | 0 0 | View on Bluesky | view

Profile picture Dan Killam (@dantheclamman.blog)

be the poster you want to see in the world

29/8/2025, 5:27:52 PM | 1 0 | View on Bluesky | view

Profile picture Dan Killam (@dantheclamman.blog) reply parent

the album cover for U can't touch this by MC Hammer
29/8/2025, 5:27:02 PM | 1 0 | View on Bluesky | view

Profile picture Dan Killam (@dantheclamman.blog) reply parent

soup 4 weeks

29/8/2025, 5:25:27 PM | 0 0 | View on Bluesky | view

Profile picture Dan Killam (@dantheclamman.blog) reply parent

My thoughts are that it's awesome! bsky.app/profile/dant...

29/8/2025, 5:15:07 AM | 1 0 | View on Bluesky | view