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
The horseshoe crab of the genus Limulus: living fossil or stabilomorph?
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Mar 2017 – Sep 2025Where it's discussed
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X / Twitter15 posts
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Facebook10 posts
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YouTube6 videos
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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.
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.
Overall, participants show high interest in the topic, citing research, scientific debates, and historical evolutionary concepts.
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.
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@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
@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
RT @JacksonWheat1: He just shows a fossil alongside a picture of a modern animal, and the similarities are supposed to indicate no evolutio…
@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
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Understanding Evolutionary Stasis and Stabilomorphism in Fossils
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@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
@leroyb756 @NotEvolution1 @DOnyali26 @ReformedBritt Several features in Jurassic horseshoe crabs lacking in modern horseshoe crabs. https://t.co/G23Vr3X7Yc
@Stephen91944457 @MichaelNazirAli Will you ignore another scientific explanation of stasis with scientific resources provided to back it up? https://t.co/JqrntRjHd0
https://t.co/khzs7GTqiy
@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
@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
@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
RT @JacksonWheat1: He just shows a fossil alongside a picture of a modern animal, and the similarities are supposed to indicate no evolutio…
RT @JacksonWheat1: He just shows a fossil alongside a picture of a modern animal, and the similarities are supposed to indicate no evolutio…
RT @JacksonWheat1: He just shows a fossil alongside a picture of a modern animal, and the similarities are supposed to indicate no evolutio…
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
@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
@tinusolivier13 @RJDownard @Jason_Tolkien Oh lord, have you read the literature on any of these? I have! https://t.co/UgGEYDf0wF
@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