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avatar_Halichoeres

Sexual dimorphism in ichthyosaurs

Started by Halichoeres, October 13, 2018, 07:08:45 PM

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Halichoeres

October 13, 2018, 07:08:45 PM
Sexual dimorphism is common in nature, but notoriously difficult to detect in fossils, because there are so few dispositive clues to sex. Using a set of 40 specimens, including one gravid (pregnant) female, these researchers believe they've found a way to detect dimorphism in at least a couple of ichthyosaur species (genus Chaohusaurus).

The biggest clue seems to be flipper length relative to body length: males have longer flippers.



Open access! https://www.nature.com/articles/s41598-018-33302-4
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