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The taxonomic order Rhynchonellida is one of the two main groups of living articulate brachiopods, the other being the order Terebratulida. They are recognized by their strongly ribbed wedge-shaped or nut-like shells, and the very short hinge line. The hinges come to a point, a superficial resemblance to many (phylogenetically unrelated) bivalve mollusk shells. The loss of the hinge line was an important evolutionary innovation, rhynchonellids being the first truly non-strophic shells with a purely internal articulation (teeth-sockets).

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  • المخطميات (الاسم العلمي: Rhynchonellida) هي رتبة من عضديات الأرجل تتبع طائفة المخطمانية. (ar)
  • Els rinconèl·lides (Rhynchonellida) són un ordre de braquiòpodes articulats. (ca)
  • Rhynchonellida (Rhynchonelliden) sind ein Taxon von Armfüßern (Brachiopoda) mit kurzem Schlossrand, mit mehr oder weniger kugeliger Gehäuseform und einer impunctaten Schale. Einfache Armstützen (Cruren) sind Ansätze für das fleischige Armgerüst. Sie bilden zusammen mit den , Orthida, Spiriferida, Atrypida, Pentamerida und Terebratulida das Taxon , das seinerseits zum Unterstamm der Rhynchonelliformea zählt. (de)
  • Los rinconélidos (Rhynchonellida) son un orden de braquiópodos que aparecen en el registro fósil en el Ordovícico,​ y que se caracterizan por presentar muy marcadas,​ y por tener la comisura de las valvas replegada, con un pliegue en la valva dorsal y un surco en la ventral que encajan entre sí.​ (es)
  • Ordo taksonomi Rhynchonellida adalah salah satu dari dua kelompok utama brakiopoda artikulata hidup, yang lainnya adalah ordo Terebratulida. Mereka diakui oleh kuat bergaris berbentuk baji atau kacang-seperti cangkang mereka, dan garis engsel yang sangat singkat. (in)
  • The taxonomic order Rhynchonellida is one of the two main groups of living articulate brachiopods, the other being the order Terebratulida. They are recognized by their strongly ribbed wedge-shaped or nut-like shells, and the very short hinge line. The hinges come to a point, a superficial resemblance to many (phylogenetically unrelated) bivalve mollusk shells. The loss of the hinge line was an important evolutionary innovation, rhynchonellids being the first truly non-strophic shells with a purely internal articulation (teeth-sockets). Strong radiating ribs are common in this group; and there are generally very strong plications or accordion-like folds on the sulcus (the long middle section) of the shell. This probably helps regulate the flow of water in and out of the shell. All rhynchonellids are biconvex (have a bulbous shell), and have a fold located in the . This means that the commissure, the line between the two valves or shells, is zigzagged, a distinguishing characteristic of this group. The prominent beak of the usually overlaps that of the brachial valve, in order to allow the shell to open and close. There is usually a functional pedicle although the may be partially closed. Morphologically, the rhynchonellid has changed little since its appearance during the Ordovician period. It seems to have evolved from pentamerids, and in turn gave rise to the first atrypids and , both of which are characterized by the development of a complex spiral brachidium. Although much diminished by the terminal Paleozoic extinction, it experienced a revival during the Early Jurassic period, and became the most abundant of all brachiopods during the Mesozoic Era. (en)
  • Ринхонеллиды (лат. Rhynchonellida) — отряд плеченогих из класса Rhynchonellata. Известковая раковина двояковыпуклая, ребристая с хорошо развитым синусом и седлом, арея узкая. Окаменевшие останки ископаемых ринхонеллид найдены в Северной Америке (США и Канаде). Известны с раннего ордовика, наибольшего разнообразия достигли в позднем палеозое. В мезозое их становится меньше, в кайнозое еще меньше. Несколько видов живут и в настоящее время. (ru)
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  • Kuhn, 1949 (en)
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  • Rhynchotrema dentatum, a rhynchonellid brachiopod from the Cincinnatian of SE Indiana. (en)
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  • [[#Classification (en)
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  • Subgroups (en)
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  • Rhynchonellida (en)
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  • المخطميات (الاسم العلمي: Rhynchonellida) هي رتبة من عضديات الأرجل تتبع طائفة المخطمانية. (ar)
  • Els rinconèl·lides (Rhynchonellida) són un ordre de braquiòpodes articulats. (ca)
  • Rhynchonellida (Rhynchonelliden) sind ein Taxon von Armfüßern (Brachiopoda) mit kurzem Schlossrand, mit mehr oder weniger kugeliger Gehäuseform und einer impunctaten Schale. Einfache Armstützen (Cruren) sind Ansätze für das fleischige Armgerüst. Sie bilden zusammen mit den , Orthida, Spiriferida, Atrypida, Pentamerida und Terebratulida das Taxon , das seinerseits zum Unterstamm der Rhynchonelliformea zählt. (de)
  • Los rinconélidos (Rhynchonellida) son un orden de braquiópodos que aparecen en el registro fósil en el Ordovícico,​ y que se caracterizan por presentar muy marcadas,​ y por tener la comisura de las valvas replegada, con un pliegue en la valva dorsal y un surco en la ventral que encajan entre sí.​ (es)
  • Ordo taksonomi Rhynchonellida adalah salah satu dari dua kelompok utama brakiopoda artikulata hidup, yang lainnya adalah ordo Terebratulida. Mereka diakui oleh kuat bergaris berbentuk baji atau kacang-seperti cangkang mereka, dan garis engsel yang sangat singkat. (in)
  • Ринхонеллиды (лат. Rhynchonellida) — отряд плеченогих из класса Rhynchonellata. Известковая раковина двояковыпуклая, ребристая с хорошо развитым синусом и седлом, арея узкая. Окаменевшие останки ископаемых ринхонеллид найдены в Северной Америке (США и Канаде). Известны с раннего ордовика, наибольшего разнообразия достигли в позднем палеозое. В мезозое их становится меньше, в кайнозое еще меньше. Несколько видов живут и в настоящее время. (ru)
  • The taxonomic order Rhynchonellida is one of the two main groups of living articulate brachiopods, the other being the order Terebratulida. They are recognized by their strongly ribbed wedge-shaped or nut-like shells, and the very short hinge line. The hinges come to a point, a superficial resemblance to many (phylogenetically unrelated) bivalve mollusk shells. The loss of the hinge line was an important evolutionary innovation, rhynchonellids being the first truly non-strophic shells with a purely internal articulation (teeth-sockets). (en)
rdfs:label
  • Rhynchonellida (en)
  • مخطميات (ar)
  • Rinconèl·lides (ca)
  • Rhynchonellida (de)
  • Rhynchonellida (es)
  • Rhynchonellida (in)
  • Ринхонеллиды (ru)
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