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Aptychus

An aptychus is a type of marine fossil. It is a hard anatomical structure, a sort of curved shelly plate, now understood to be part of the body of an ammonite. Paired aptychi have, on rare occasions, been found at or within the aperture of ammonite shells. The aptychus was usually composed of calcite, whereas the ammonite shell was aragonite.

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Aptychus

Nodes21
Edges20
Triples19
Avg. degree1.9
Density0.095238
Components1

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Aptychus

Top relations

related to Further reading · 9
Aptychus → August, By Calvin, Cephalopod Aptychi, Feldmann, Frye, Kirtlandia, Morphological Terminology, North American Late Devonian, Rodney
related to Gallery · 5
Aptychus → Fossil, LaevaptychusPair, Lingulaticeras, Pair, Solnhofen
related to Function · 4
Aptychus → Aptychi, If, Set, Some
is a · 1
Aptychus → type of marine fossil

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Important terminology

ammonite aptychi found shells usually valves plate within shell fossil now paired devonian often case function aperture calcite aragonite fossils

Entity relationships Subject–Predicate–Object triples

SubjectPredicateObjectConfidenceSrc
Aptychusis atype of marine fossil0.90text
Aptychusrelated to FunctionAptychi0.60section
Aptychusrelated to FunctionSet0.60section
Aptychusrelated to FunctionSome0.60section
Aptychusrelated to FunctionIf0.60section
Aptychusrelated to Further readingMorphological Terminology0.60section
Aptychusrelated to Further readingNorth American Late Devonian0.60section
Aptychusrelated to Further readingCephalopod Aptychi0.60section
Aptychusrelated to Further readingKirtlandia0.60section
Aptychusrelated to Further readingAugust0.60section
Aptychusrelated to Further readingBy Calvin0.60section
Aptychusrelated to Further readingFrye0.60section

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    Min side: 3
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