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Proceedings of the Zoological Society of London, 1956
SUMMARYThe developing hard tissues of the teeth of Echinus esculentus are described and figured, and it is noted that calcification occurs in two forms. Attention is drawn to a structural analogy which appears to exist between these two calcified tissues and the primary tissues of vertebrate teeth, despite certain differences in the chemical analysis ...
A. B. MACGREGOR +3 more
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SUMMARYThe developing hard tissues of the teeth of Echinus esculentus are described and figured, and it is noted that calcification occurs in two forms. Attention is drawn to a structural analogy which appears to exist between these two calcified tissues and the primary tissues of vertebrate teeth, despite certain differences in the chemical analysis ...
A. B. MACGREGOR +3 more
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Ichnos, 2020
The large holasteroid echinoid Hemipneustes striatoradiatus (Leske) was exploited by diverse invertebrate encrusters and borers during the Maastrichtian, both pre- and post-mortem. In life, the specimen described herein was perforated by multiple Oichnus
S. Donovan, J. Jagt
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The large holasteroid echinoid Hemipneustes striatoradiatus (Leske) was exploited by diverse invertebrate encrusters and borers during the Maastrichtian, both pre- and post-mortem. In life, the specimen described herein was perforated by multiple Oichnus
S. Donovan, J. Jagt
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1922
Unter den umfangreichen Sammlungen, die F. Junghuhn auf Java zusammengebracht hatte, befand sich auch eine grosse Anzahl von Echiniden. Sie wurden im Jahre 1854 durch Herklots ¹) beschrieben. Dieser Autor war offenbar von der vorgefassten Meinung ausgegangen, dass es sich hier um eine ganz neue und fremdartige Fauna handele, so war von ihm nur eine ...
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Unter den umfangreichen Sammlungen, die F. Junghuhn auf Java zusammengebracht hatte, befand sich auch eine grosse Anzahl von Echiniden. Sie wurden im Jahre 1854 durch Herklots ¹) beschrieben. Dieser Autor war offenbar von der vorgefassten Meinung ausgegangen, dass es sich hier um eine ganz neue und fremdartige Fauna handele, so war von ihm nur eine ...
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2009
Abstract The Phylum Echinodermata is a clade of marine invertebrate deuterostomes that includes such well-known animals as the starAshes and sea urchins. All echinoderms possess a calcitic endoskeleton with a distinctive and unique three-dimensional structure, a stereom, and they all undergo an unusual asymmetrical development in which ...
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Abstract The Phylum Echinodermata is a clade of marine invertebrate deuterostomes that includes such well-known animals as the starAshes and sea urchins. All echinoderms possess a calcitic endoskeleton with a distinctive and unique three-dimensional structure, a stereom, and they all undergo an unusual asymmetrical development in which ...
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Polykristalliner Calcit bei Seeigeln (Echinodermata, Echinoidea)
Zeitschrift f�r Zellforschung und Mikroskopische Anatomie, 1971Es wurde erstmals fur Echinodermen primar polykristalliner Calcit nachgewiesen, und zwar im Cortex der Primarstacheln der Cidaridae, dem sekundaren Zahnskelet von Clypeaster und in den akzessorischen Kalkstrukturen, die im Kauabschnitt die Furche der Diadematiden-Zahne ausfullen.
Konrad M�rkel +2 more
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Papers in Palaeontology, 2019
The archaeocidarids comprise the most derived stem group echinoids and have long been regarded as closely related to the crown group. The fossil record of echinoids in the Palaeozoic is, however, poor, so details surrounding the initial divergence of ...
J. Thompson +3 more
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The archaeocidarids comprise the most derived stem group echinoids and have long been regarded as closely related to the crown group. The fossil record of echinoids in the Palaeozoic is, however, poor, so details surrounding the initial divergence of ...
J. Thompson +3 more
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Jamaican Cretaceous Echinoidea
1993Jamaica has the best-known fauna of fossil crinoids of the Antillean islands. Two Cretaceous species have been reexamined on the basis of new material. Lower Cretaceous Apiocrinites sp., previously referred to Austinocrinus n. sp. and first documented from a short pluricolumnal, is now known from brachials and further fragments of column.
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Australian Tertiary Apatopygidae (Echinoidea)
1999(Uploaded by Plazi from the Biodiversity Heritage Library) No abstract provided.
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