Operculate cyclostome bryozoans (Eleidae) from the Bohemian Cretaceous

Taylor, Paul D.; Zágoršek, Kamil

doi:10.1007/s12542-011-0108-y

Cited by 11 publications

(8 citation statements)

References 22 publications

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“…17F REMARKS: The colony is relatively small, but the elongated aperture of the avicularia and the gothic arch-shaped apertures closely resemble Reptomultelea sarthacensis (Orbigny, 1853). Reptomultelea sarthacensis is among the most common bryozoans in the Late Cretaceous of Europe, and has been reported from the Cenomanian and Turonian of England (Pitt and Taylor 1990), France and Germany (Taylor 1994), and the Czech Republic (Taylor and Zágoršek 2011). As a result, it is highly probable that the studied specimen belongs to this species.…”

Section: Bryozoa (Kamil Zágoršek)mentioning

confidence: 90%

Silicified sea life – Macrofauna and palaeoecology of the Neuburg Kieselerde Member (Cenomanian to Lower Turonian Wellheim Formation, Bavaria, southern Germany)

Schneider¹,

Jäger²,

Kroh³

et al. 2013

Acta Geologica Polonica

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Schneider, S., Jager, M., Kroh, A., Mitterer, A., Niebuhr, B., Vodražka, R., Wilmsen, M., Wood, C.J. and Zagoršek, K. 2013. Silicified sea life - Macrofauna and palaeoecology of the Neuburg Kieselerde Member (Cenomanian to Lower Turonian Wellheim Formation, Bavaria, southern Germany). Acta Geologica Polonica, 63(4), 555-610. Warszawa. With approximately 100 species, the invertebrate macrofauna of the Neuburg Kieselerde Member of the Wellheim Formation (Bavaria, southern Germany) is probably the most diverse fossil assemblage of the Danubian Cretaceous Group. Occurring as erosional relicts in post-depositional karst depressions, both the Cretaceous sediments and fossils have been silicified during diagenesis. The Neuburg Kieselerde Member, safely dated as Early Cenomanian to Early Turonian based on inoceramid bivalve biostratigraphy and sequence stratigraphy, preserves a predominantly soft-bottom community, which, however, is biased due to near-complete early diagenetic loss of aragonitic shells. The community is dominated by epifaunal and semi-infaunal bivalves as well as sponges that settled on various (bio-) clasts, and may widely be split into an early bivalve-echinoid assemblage and a succeeding sponge-brachiopod assemblage. In addition to these groups we document ichnofauna, polychaete tubes, nautilids and bryozoans. The fauna provides evidence of a shallow to moderately deep, calm, fully marine environment, which is interpreted as a largescale embayment herein. The fauna of the Neuburg Kieselerde Member is regarded as an important archive of lower Upper Cretaceous sea-life in the surroundings of the Mid-European Island.

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Section: Bryozoa (Kamil Zágoršek)mentioning

confidence: 90%

Silicified sea life – Macrofauna and palaeoecology of the Neuburg Kieselerde Member (Cenomanian to Lower Turonian Wellheim Formation, Bavaria, southern Germany)

Schneider¹,

Jäger²,

Kroh³

et al. 2013

Acta Geologica Polonica

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“…These features clearly differentiate them mor phologically and evolutionarily both from the order Cyclostomata, in which they are place by some authors (Taylor, 1985(Taylor, , 1994Pitt and Taylor, 1990;Taylor and Weedon, 2000;Taylor and Ernst, 2008;Taylor and Zágoršek, 2011;etc. ), and from the other post Paleozoic "cyclostome" Tubuliporida and Ceri oporida [according to L.A. Viskova's system, 1992].…”

mentioning

confidence: 78%

“…Some authors (Hamm, 1881;Marsson, 1887;Pergens, 1889;Gre gory, 1899;Canu and Bassler, 1922) treated it as a sim ple calcareous plate or diaphragm, which appeared after the polypide had ceased to function. Other researchers considered this structure as an operculum or operculum shaped plate (d 'Orbigny, 1851'Orbigny, -1854Waters, 1891;Levinsen, 1912Levinsen, , 1925Viskova, 1965Viskova, , 1972Viskova, , 1992Viskova, , 2011Taylor, 1985Taylor, , 1994Pitt and Taylor, 1990;Taylor and Zágoršek, 2011). Taylor's investiga tions (1985Taylor's investiga tions ( , 1994 corroborated the presence of true calcified opercula (A.…”

Section: Morphological Features Of Melicerititidamentioning

confidence: 93%

“…2052PIN, nos. , 2922 and literature data (Hagenow, 1851;d'Orbigny, 1851d'Orbigny, -1854Hamm, 1881;Marsson, 1887;Gregory, 1899;Lang, 1906;Levinsen, 1912Levinsen, , 1925Bassler, 1922, 1926;Voigt, 1951Voigt, , 1953Voigt, , 1960Voigt, , 1967Voigt, , 1972Voigt, , 1973Voigt, , 1975Voigt, , 1981Voigt, , 1983Voigt, , 1985Voigt, , 1989Smirnova, 1958;Voigt, 1962;Viskova, 1965Viskova, , 1972Viskova, , 1992Viskova, , 2011Viskova, , 2014Taylor, 1985Taylor, , 1994Viskova and Morozova, 1988;Pitt and Taylor, 1990;Zavjalov, 1998;Taylor and Weedon, 2000;Taylor and Ernst, 2008;Taylor and Zágoršek, 2011;etc.). This analysis shows that Melicerititida constitute a small group of post Paleozoic bryozoans of the class Stenolaemata.…”

Section: Morphological Features Of Melicerititidamentioning

confidence: 99%

“…The distal part of autozooecia is considerably expanded and covered by the terminal calcareous plate known as facette (Canu and Bassler, 1922, p. 24), the distal half of which contains an aperture. In the paleontological lit erature this plate is also known as zooecial area (Levinsen, 1912, p. 9) and frontal wall (Pitt and Taylor, 1990, p. 104;Taylor, 1994;Taylor and Zágoršek, 2011). We have adopted the term facette (Viskova, 1965(Viskova, , 1972(Viskova, , 1992(Viskova, , 2011Viskova and Morozova, 1988).…”

Section: Morphological Features Of Melicerititidamentioning

confidence: 99%

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Bryozoans of the order Melicerititida: Morphological features and position of the order in the taxonomic structure of the class Stenolaemata

Viskova

2016

Paleontol. J.

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Morphological features of a distinctive group of Post Paleozoic bryozoans belonging to the order Melicerititida (Stenolaemata) are discussed. They include funnel shaped zooecia, facettes, semicircular zoo ecial apertures with a straight proximal edge, calcified opercula, and various types of vicarious eleozooecia, which resemble avicularia of cheilostome bryozoans. These morphological structures are unique within the class Stenolaemata. They not only differentiate these bryozoans both morphologically and evolutionarily from Cyclostomata, in which some authors place them, but also from all the other orders of this class.

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Boring bryozoans: an investigation into the endolithic bryozoan family Penetrantiidae

Decker

Hirose

Lemer³

et al. 2023

Org Divers Evol

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An endolithic lifestyle in mineralized substrates has evolved multiple times in various phyla including Bryozoa. The family Penetrantiidae includes one genus with ten extant and two fossil species. They predominantly colonize the shells of molluscs and establish colonies by chemical dissolution of calcium carbonate. Based on several morphological characters, they were described to be either cheilostome or ctenostome bryozoans. For more than 40 years, neither the characters of species identity and systematics nor the problem of their phylogeny was approached. Consequently, the aim of this study is to reevaluate species identities and the systematic position of the genus Penetrantia by analyzing at least six different species from eight regions with the aid of modern methods such as confocal laser scanning microscopy and 3D-reconstruction techniques. This study demonstrates that the musculature associated with the operculum and brood chamber shows significant differences from the cheilostome counterparts and seems to have evolved independently. Together with the presence of other ctenostome-like features such as true polymorphic stolons and uncalcified body wall, this finding supports a ctenostome affinity. Operculum morphology reveals many new species-specific characters, which, together with information about gonozooid morphology, tentacle number, and zooid size ranges, will enhance species identification. It also revealed a probable new species in Japan as well as potential cryptic species in France and New Zealand. In addition, this study increases the known distribution range of the family and its substrate diversity. Altogether, the new information collated here provides the basis for future work on a neglected taxon.

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Operculate cyclostome bryozoans (Eleidae) from the Bohemian Cretaceous

Cited by 11 publications

References 22 publications

Silicified sea life – Macrofauna and palaeoecology of the Neuburg Kieselerde Member (Cenomanian to Lower Turonian Wellheim Formation, Bavaria, southern Germany)

Silicified sea life – Macrofauna and palaeoecology of the Neuburg Kieselerde Member (Cenomanian to Lower Turonian Wellheim Formation, Bavaria, southern Germany)

Bryozoans of the order Melicerititida: Morphological features and position of the order in the taxonomic structure of the class Stenolaemata

Boring bryozoans: an investigation into the endolithic bryozoan family Penetrantiidae

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