Soliclymenia
Sign in to saveSoliclymenia is a genus of ammonites from the Late Devonian. S. paradoxa has an unusual, triangularly-coiled shell. Additional genera of ammonites with triangular shells are Kamptoclymenia, Trigonoshumardites, and Trigonogastrioceras. Soliclymenia semiparadoxa, which is known only from the holotype, is semi-triangular, the innermost whorls being circular. Other species of this genus, including S. solarioides and S. recticostata, have a circularly-coiled shell.
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Soliclymenia is a genus of ammonites from the Late Devonian. S. paradoxa has an unusual, triangularly-coiled shell. Additional genera of ammonites with triangular shells are Kamptoclymenia, Trigonoshumardites, and Trigonogastrioceras. Soliclymenia semiparadoxa, which is known only from the holotype, is semi-triangular, the innermost whorls being circular. Other species of this genus, including S. solarioides and S. recticostata, have a circularly-coiled shell.
== References == Fossils (Smithsonian Handbooks) by David Ward Korn, D., Niedźwiedzki, R., & Posieczek, J. B. (2005). Age, distribution, and phylogeny of the peculiar Late Devonian ammonoid Soliclymenia. Acta Geologica Polonica, 55(2), 99-108.
Excerpted from Wikipedia’s “Soliclymenia” article, available under the CC BY-SA 4.0 licence.