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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
Aptychus
Extinct subclass of cephalopod molluscs
postulated to have been a jaw apparatus. The plates are collectively termed the aptychus or aptychi in the case of a pair of plates, and anaptychus in the case
Ammonoidea
Feature of gastropod anatomy
ammonites (extinct shelled cephalopods), a calcareous structure known as the aptychus (plural aptychi) existed. When these were first described they were thought
Operculum_(gastropod)
Anatomical structure of animals
An operculum also covers the eggs of stick insects and other insects. Aptychus: A structure in ammonites which usually consists of two plates, and which
Operculum_(animal)
Extant subclass of cephalopods
lacks an aptychus, a biomineralized plate which is proposed to act as an operculum which closes the shell to protect the body. However, aptychus-like plates
Nautiloid
Distal portion of the forelimb of an animal
Hectocotylus Tentacles Carpus Dactylus Manus Suckers and hooks Buccal region Aptychus Beak Odontophore Radula Spadix and antispadix Occipital region Nuchal crest
Manus_(anatomy)
The Aptychus is a mysterious piece of ammonite anatomy.
List_of_ammonite_genera
Feature on the shells of mollusks
scaphopods. The word "sculpture" is also applied to surface features of the aptychus of ammonites, and to the outer surface of some calcareous opercula of marine
Sculpture_(mollusc)
Geological time period
Germany and Wealden of Hanover; the limestones and shales of Teschen; the Aptychus and Pygope diphyoides marls of Spain, and the Petchorian formation of Russia
Neocomian
River in Ohio, United States
the arthropod Spathiocaris but in 2017 reinterpreted to be an ammonoid aptychus, may also be found. Fossil fish teeth, scales, and sometimes bones or armor
Euclid_Creek
Extinct genus of dinosaurs
it lay on its belly, an interpretation that is further supported by an aptychus (body part of an ammonite) found within the slab; aptychi are almost always
Juravenator
Exoskeleton of an animal in the phylum Mollusca
shell is often the only mineralised part of a mollusc (however also see Aptychus and operculum). The shells are usually preserved as calcium carbonate –
Mollusc_shell
Genus of molluscs (fossil)
Somalia and the western North Atlantic. In Mexico, the first records of Aptychus latus (= Laevaptychus latus) are provided from the Upper Jurassic of the
Laevaptychus
Paleontological site in France
Hibolites Belemnoidea Laevaptychus L. latus A kind of Aptychus. Formerly referred as Aptychus latus. Lithacoceras L. cf. ulmense Ataxioceratidae L. sp
Cerin_Lagerstätte
Extinct family of ammonites
or less tabulate venter, with lateral or ventrolateral tubercles. The aptychus is double valved with a concentrically ribbed surface. "Paleobiology Database
Kosmoceratidae
Geological formation in England
An aptychus with the name Trigonellites latus, from the Kimmeridge Clay Formation
Kimmeridge_Clay
Moldova-Sulița IV botanic 116,40 Bila-Lala Reservation Cârlibaba IV mixt 325,10 The Aptychus layer from Pojor Fundu Moldovei IV palaeontological 1 Tinovul Găina - Lucina
List of natural reservations of Suceava County
List_of_natural_reservations_of_Suceava_County
the formation was described in more detail by Fuchs, Weis & Thuy (2024). Aptychus sp. Belemnitida indet. Beloteuthis sp. Bositra buchi Bositra sp. Caturus
Schistes_bitumineux
German mineralogist, geologist and paleontologist
Ueber den Jurakalk von Kurowitz in Mähren und über darin vorkommenden Aptychus imbricatus, 1841 – On the Jurassic limestone of Kurowitz in Mähren. Geognostische
Ernst_Friedrich_Glocker
Cretaceous Angertal Formation Devonian Angulatensandstein Formation Jurassic Aptychus Beds Formation Jurassic Arietenkalk Formation Jurassic Aspidoides Bank
List of fossiliferous stratigraphic units in Germany
List_of_fossiliferous_stratigraphic_units_in_Germany
American palaeontologist
(1920) Ammonite species Aptychus cristobalensis (1921) Ammonite species Aptychus cubanensis (1921) Ammonite species Aptychus pimientensis (1921) Ammonite
Marjorie_O'Connell
Extinct family of ammonites
venter, is typically hollow. Sutures vary from simple to complex. The aptychus is shiny with coarse folds (Cornaptychus). Sonniniidae are included in
Sonniniidae
Genus of molluscs (fossil)
Epaspidoceras lusitanicum, from Charente-Maritime. Specimen showing the aptychus, on display at Galerie de paléontologie et d'anatomie comparée, Paris Scientific
Epaspidoceras
Genus of molluscs (fossil)
†T. curvirostris Schlotheim, 1836 †T. simplex? Schlotheim, 1863 vide Goldfuss, 1863 Synonyms Aptychus von Meyer, 1831 Lyrodon simplex? Schlotheim, 1863
Trigonellites
French geologist (1828-1895)
discovered Perisphinctes Kobelti from the Oxfordian age. He collected Aptychus (from the lamellosi group), Peltoceras transversarium, Rhacophyllites tortisulcatus
Georges_Le_Mesle
Geologic formation in Austria and Germany
conformably overlain by the so-called Aptychus Limestone of the Ammergau Formation. The changeover to the Aptychus Limestone is gradual. The lower contact
Ruhpolding_Formation
Extinct subfamily of ammonites
Aptycus are bivalved and very durable, and in the "lower Kimmeridgian form Aptychus beds, containing few or no ammonites". (Kimmeridgian is middle Upper Jurassic
Aspidoceratinae
Extinct family of ammonites
feebly keeled. Sutures are simple with phylloid saddle endings in some. The aptychus is single, found in sutu in Psiloceras Badouxia Guex and Taylor, 1976 Caloceras
Psiloceratidae
(2023). A specimen of Prionocyclus germari found in association with an aptychus referred to the genus Praestriaptychus is described from the Turonian strata
2023_in_paleomalacology
APTYCHUS
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Girl/Female
Indian
Pious, Righteous
Girl/Female
Indian
First Ray of Sun; Sun
Boy/Male
American, British, Dutch, English
Fortified
Boy/Male
Muslim
Gazelle
Girl/Female
Hindu
Girl/Female
Arabic
Modesty
Boy/Male
Indian
Blue Lotus
Boy/Male
Hindu
Lord of the earth
Female
Swiss
, bear.
Girl/Female
Australian, British, German, Hindu, Indian, Russian
Impressive; Cute
APTYCHUS
APTYCHUS
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APTYCHUS
n.
A shelly plate found in the terminal chambers of ammonite shells. Some authors consider them to be jaws; others, opercula.