The evolution of the Mesozoic rhynchonellida

Ager, Derek; Childs, Alan; Pearson, Dean A.

doi:10.1016/s0016-6995(72)80001-9

Cited by 24 publications

(52 citation statements)

References 17 publications

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“…Crural types and their evolution have a relevant taxonomic and phylogenetic significance in post-Paleozoic Rhynchonellida (e.g., Ager et al 1972;Manceñido and Owen 2001;Savage et al 2002;Tomasovych 2006;Manceñido et al 2007;Radulović et al 2007;Manceñido and Motchurova-Dekova 2010 ). This feature has also been used in the systematics of terebratulides.…”

Section: Introductionmentioning

confidence: 99%

A New Early Jurassic Rhynchonellid Brachiopod From the Western Tethys and Implications for Systematics of Rhynchonellids From the Triassic–jurassic Boundary

Tomášových

2006

Journal of Paleontology

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Section: Introductionmentioning

confidence: 99%

A New Early Jurassic Rhynchonellid Brachiopod From the Western Tethys and Implications for Systematics of Rhynchonellids From the Triassic–jurassic Boundary

Tomášových

2006

Journal of Paleontology

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“…4, p. 1237 included sections of a species from northern Italy, Rhynchonellina paronai BÖSE 1894, which Cicardi & Gaetani (1974) had assigned to Sulcirostra. Obviously, the cardinal region in the sections of Rhynchonellina paronai is different from those produced by Ager (1959). They show certain affinities to Rhynchonellina when compared to its type species, R. suessi GEM-MELLARO 1871.…”

Section: Methodsmentioning

confidence: 91%

“…The erection of Sulcirostra (formerly Rhynchonellopsis) enabled a simple subdivision of external morphology: smooth forms were included in Rhynchonellina s.s. and ribbed forms in Sulcirostra. Ager (1959) made serial sections of the Austrian Rhynchonellina juvavica BITTNER 1890, on the assumption that this species was a subjective synonym of the Sicilian Rhynchonellina seguenzae, the type species of Sulcirostra. In the first edition of the Treatise (Ager 1965b: H602, Fig.…”

Section: Methodsmentioning

confidence: 99%

“…Thus, in Sulcirostra juvavica, lateral septa support small divided hinge plates from which the crura evolved. A septalium is not present and the median septum is very short (Ager 1959(Ager , 1965b. Sulcirostra paronai displays a Rhynchonellina-like interior with large hinge plates, a cardinal process and dental lamellae, but lacking a median septum.…”

Section: Classification Aspects (H Sulser)mentioning

confidence: 99%

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Dimerelloid rhynchonellide brachiopods in the Lower Jurassic of the Engadine (Canton Graubünden, National Park, Switzerland)

Sulser

Furrer

2008

Swiss J. Geosci.

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New brachiopods (Dimerelloidea, Rhynchonellida) from Lower Jurassic (?lower Hettangian) hemipelagic sediments of the Swiss National Park in south-eastern Engadine are described: Sulcirostra doesseggeri sp. nov. and Carapezzia engadinensis sp. nov. Sulcirostra doesseggeri is externally similar to S. fuggeri (FRAUSCHER 1883), a dubious species, that could not be included in a comparative study, because relevant samples no longer exist. A single specimen was tentatively assigned to Sulcirostra ?zitteli (BÖSE 1894) by comparison of its external morphology with S. zitteli from the type locality. The partly silicified brachiopods are associated with sponge spicules, radiolarians and crinoid ossicles. Macrofossils are rare: dictyid sponges, gastropods, bivalves, crustaceans, shark teeth and scales of an actinopterygian fish. The Lower Jurassic sediments (Alpisella beds, a basal member of the Allgäu Formation) preserving the brachiopods belong to the Ortler nappe (Upper Austroalpine nappes). The exact age of the Alpisella beds is not known, as index fossils are lacking. Their stratigraphic position above the Rhaetian Kössen Formation and below the ammonite-dated Trupchun beds suggests a very Early Jurassic, probably early Hettangian age for the new brachiopod fauna. The new species of Sulcirostra and Carapezzia are confined to a very small geographic area, a peculiarity also observed in other Early Jurassic dimerelloid brachiopods. These brachiopods presumably adapted to current-dominated submarine highs, where their shells could not accumulate, except when trapped in submarine cavities or re-deposited in submarine fans. Transport by turbidity currents is suggested for the Early Jurassic dimerelloids from the Engadine. Problems with the generic definition of Sulcirostra and the higher rank classification of Carapezzia are discussed. ZUSAMMENFASSUNG

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“…The rhynchonellid classification was significantly rearranged in the "Treatise" and many genera were defined with reference to internal structures. Ager, Childs, and Pearson (1972) dealt with all the Mesozoic rhynchonellid genera in the sense of evolution and complemented the systematic classification of the Mesozoic Rhynchonellida. This is one of the most important summary works in the recent study of rhynchonellids.…”

Section: Introductionmentioning

confidence: 99%

Jurassic Rhynchonellids: Internal Structures and Taxonomic Revisions

Shi¹,

Grant²

1993

Smithsonian Contributions to Paleobiology

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Shi, Xiao-ying and Richard E. Grant. Jurassic Rhynchonellids: Internal Structures and Taxonomic Revisions. Smithsonian Contributions to Paleobiology, number 73, 190 pages, 83 figures, 18 plates, 1993.-Jurassic brachiopods of the order Rhynchonellida are classified according to modem concepts and techniques, with special attention to internal structures. They are grouped into 6 families and 16 subfamilies of which three are new: the Acanthorhynchiinae, the Cryptorhynchiinae, and the Piarorhynchiinae. Subfamilies emended or revised are the

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The evolution of the Mesozoic rhynchonellida

Cited by 24 publications

References 17 publications

A New Early Jurassic Rhynchonellid Brachiopod From the Western Tethys and Implications for Systematics of Rhynchonellids From the Triassic–jurassic Boundary

A New Early Jurassic Rhynchonellid Brachiopod From the Western Tethys and Implications for Systematics of Rhynchonellids From the Triassic–jurassic Boundary

Dimerelloid rhynchonellide brachiopods in the Lower Jurassic of the Engadine (Canton Graubünden, National Park, Switzerland)

Jurassic Rhynchonellids: Internal Structures and Taxonomic Revisions

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