June 2015 PMID 25275563

The horseshoe crab of the genus Limulus: living fossil or stabilomorph?

Adrian Kin, Błażej Błażejowski

Mentions

35
Peak: 5 in Mar 2020
across 4 sources since Mar 2017

Extended reach

5,761,747
potential audience

Total likes

111,880

Video views

5,719,619

Mentions per month

Mar 2017 – Sep 2025

Where it's discussed

  • X / Twitter15 posts
  • Facebook10 posts
  • YouTube6 videos
  • Blogs4 articles

AI synopsis

What people are saying

The discussions highlight the debate between gradual evolution and stasis, with references to scientific concepts like punctuated equilibrium and examples of fossil and modern similarities, demonstrating interest and moderate engagement; the tone ranges from explanatory to defensive, emphasizing the significance of understanding evolutionary processes.

AgreementModerate agreement

Most discussions support the idea that horseshoe crabs exhibit stasis and have changed little over millions of years, with some emphasizing scientific explanations for this phenomenon.

InterestHigh interest

Overall, participants show high interest in the topic, citing research, scientific debates, and historical evolutionary concepts.

EngagementModerate engagement

The discussions involve referencing scientific theories like punctuated equilibrium, showing moderate depth, but few are deeply analyzing or debating the implications, resulting in a moderate engagement score.

ImpactModerate impact

The conversations reinforce the importance of understanding evolutionary stability, but they primarily serve academic and educational purposes rather than causing a major shift in views or policies.

Abstract in brief

  • The text describes a newly identified species of horseshoe crab, Limulus darwini, from the Late Jurassic period found in Poland, which shows similarities to modern juvenile Limulus polyphemus, indicating minimal morphological differences.
  • It discusses the ecological and dietary habits of both ancient and modern horseshoe crabs, suggesting that the new species inhabited nearshore environments and had similar feeding behaviors to present-day relatives.
  • The authors introduce the concept of "stabilomorphism" to describe a form of adaptive strategy where organisms maintain effective traits over time with less need for varied physical adaptations, contributing to long-term evolutionary stability.

Top posts

Most liked on X and Bluesky
Jackson Wheat
@JacksonWheat1 · X

He just shows a fossil alongside a picture of a modern animal, and the similarities are supposed to indicate no evolution. That's not how evolution works though. Organisms well-adapted for a niche aren't going to change much (see video): https://t.co/UgGEYDf0wF

Mar 16, 2020 · 14 likes · 3 shares · 2,836 followers View post →
Anna
@wiedzmaanna · X

Nov 4, 2023 · 2 likes · 9,193 followers View post →
Jackson Wheat
@JacksonWheat1 · X

@Frustd_Atheist @mattdeter @BrianSlimdog77 @Schmoop0521 @MrOzAtheist Creationists never try to understand PE. That’s why I made a video about it: https://t.co/UgGEYDf0wF

Feb 10, 2019 · 2 likes · 2,836 followers View post →
Tim Pieper
@TimPieper7 · X

@TheAtheistFold @Renevelation Well, I think that change is always happening, but the rates of change aren’t constant, and if a species is in an environment which it’s fairly adapted to, there’s very little selective pressure for it to make more pronounced changes over time. https://t.co/JqrntRjHd0

Oct 24, 2019 · 2 likes · 49 followers View post →
Cameron Muskelly (Explorer of Deep Time)
@PaleoCameron · X

RT @JacksonWheat1: He just shows a fossil alongside a picture of a modern animal, and the similarities are supposed to indicate no evolutio…

Mar 17, 2020 · 3 shares · 11,825 followers View post →
Zen Faulkes
@DoctorZen · X

@MNCN_Col The genus Limulus is old, but the species living over 100 millions years ago are NOT the same species alive today. https://t.co/Q2UUTkCIRU

May 13, 2020 · 5,651 followers View post →

All mentions

Asher Clark
@Abolition__Now · X

@ReluctantlyPre1 @NotEvolution1 Horseshoe Crabs today are not the same as ones in the fossil record. Here’s a paper on how they have changed since the Jurassic. https://t.co/G23Vr3X7Yc

Jan 2, 2024 · 892 followers View post →
Anna
@wiedzmaanna · X

Nov 4, 2023 · 2 likes · 9,193 followers View post →
Asher Clark
@Abolition__Now · X

@leroyb756 @NotEvolution1 @DOnyali26 @ReformedBritt Several features in Jurassic horseshoe crabs lacking in modern horseshoe crabs. https://t.co/G23Vr3X7Yc

Oct 23, 2023 · 892 followers View post →
Tim Pieper
@TimPieper7 · X

@Stephen91944457 @MichaelNazirAli Will you ignore another scientific explanation of stasis with scientific resources provided to back it up? https://t.co/JqrntRjHd0

Jul 17, 2022 · 49 followers View post →
In Salutem
@ISalutem · X

https://t.co/khzs7GTqiy

Apr 11, 2021 · 403 followers View post →
Tim Pieper
@TimPieper7 · X

@warmone2 @AtheistBigfoot But we already collected that evidence. Where have you been? https://t.co/DaoQ0lYnWr And apparently you lack education on the phenomenon of stasis or punctuated equilibrium. https://t.co/JqrntRjHd0

Nov 13, 2020 · 49 followers View post →
Zen Faulkes
@DoctorZen · X

@MNCN_Col The genus Limulus is old, but the species living over 100 millions years ago are NOT the same species alive today. https://t.co/Q2UUTkCIRU

May 13, 2020 · 5,651 followers View post →
Tim Pieper
@TimPieper7 · X

@StBenedict18 @TakeThatEpi @RBartleby @054durin @dunstan99 @MarceaMjo @ForumAtheist @jemix08 I’m so sorry you can’t read your own quotes. The guy who proposed Punctuated Equilibrium to account for things gradualism couldn’t, specifically stated it was a problem for “gradulistic accounts of” evolution. Shocker. This is not hard to understand. https://t.co/JqrntRjHd0

Mar 26, 2020 · 49 followers View post →
Cameron Muskelly (Explorer of Deep Time)
@PaleoCameron · X

RT @JacksonWheat1: He just shows a fossil alongside a picture of a modern animal, and the similarities are supposed to indicate no evolutio…

Mar 17, 2020 · 3 shares · 11,825 followers View post →
John Smith⚛ (Explorer of Reality)
@doofgeek4011 · X

RT @JacksonWheat1: He just shows a fossil alongside a picture of a modern animal, and the similarities are supposed to indicate no evolutio…

Mar 16, 2020 · 3 shares · 4,327 followers View post →
Tdlane.bsky.social
@AJLane54 · X

RT @JacksonWheat1: He just shows a fossil alongside a picture of a modern animal, and the similarities are supposed to indicate no evolutio…

Mar 16, 2020 · 3 shares · 219 followers View post →
Jackson Wheat
@JacksonWheat1 · X

He just shows a fossil alongside a picture of a modern animal, and the similarities are supposed to indicate no evolution. That's not how evolution works though. Organisms well-adapted for a niche aren't going to change much (see video): https://t.co/UgGEYDf0wF

Mar 16, 2020 · 14 likes · 3 shares · 2,836 followers View post →
Tim Pieper
@TimPieper7 · X

@TheAtheistFold @Renevelation Well, I think that change is always happening, but the rates of change aren’t constant, and if a species is in an environment which it’s fairly adapted to, there’s very little selective pressure for it to make more pronounced changes over time. https://t.co/JqrntRjHd0

Oct 24, 2019 · 2 likes · 49 followers View post →
Jackson Wheat
@JacksonWheat1 · X

@tinusolivier13 @RJDownard @Jason_Tolkien Oh lord, have you read the literature on any of these? I have! https://t.co/UgGEYDf0wF

Feb 26, 2019 · 2,836 followers View post →
Jackson Wheat
@JacksonWheat1 · X

@Frustd_Atheist @mattdeter @BrianSlimdog77 @Schmoop0521 @MrOzAtheist Creationists never try to understand PE. That’s why I made a video about it: https://t.co/UgGEYDf0wF

Feb 10, 2019 · 2 likes · 2,836 followers View post →