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avatar_Halichoeres

New fossils of Naraoia and Misszhouia might clarify relationships

Started by Halichoeres, July 16, 2018, 11:19:56 PM

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Halichoeres

July 16, 2018, 11:19:56 PM
You might know Naraoia from Safari's discontinued Cambrian Life Toob. It and its relative Misszhouia have been interpreted as relatives of trilobites, and distinguished from each other by the shape of their guts. This study describes three new species in these two genera and concludes that you can't rely on the guts, but you can tell them apart by ratios of measurements of the carapace, which is probably easier anyway.



Paper (paywall): https://onlinelibrary.wiley.com/doi/full/10.1111/pala.12383
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