archaeocyathidn.adj.

Brit.

/ˌɑːkɪə(ʊ)ˈsʌɪəθɪd/, U.S.

/ˌɑrkioʊˈsaɪəθəd/

Forms: 1800s– archaeocyathid, 1900s– archeocyathid.

Origin: A borrowing from Latin. Etymon: Latin Archaeocyathidae.

Etymology: < scientific Latin Archaeocyathidae, family name (1866 or earlier) < Archaeocyathus , genus name (E. Billings 1861, in New Species Lower Silurian Fossils I. 1; < archaeo- archaeo- comb. form + classical Latin cyathus wine-cup: see cyathus n.) + -idae (see -id suffix³).

Palaeontology.

A. n.

Any of a large and diverse group ( Archaeocyatha) of fossil sponges of the Lower Cambrian, the members of which had a calcareous skeleton, typically in the shape of a double-walled cone, and were the earliest known reef-building organisms.

ΚΠ

1875 J. W. Dawson Life's Dawn on Earth vi. 161 In the earlier part of this time these [sc. Stromatoporæ] are accompanied by the Archæocyathids.

1937 Proc. Geol. Soc. Amer. 316 Further study of the Stevens series..has shown the presence of the Lower Cambrian fossils known as archeocyathids.

1978 Sci. Amer. Aug. 114/2 Archaeocyathids were probably filter feeders, and since their remains are found in coarse sediments they probably lived in moving water.

2015 P. B. Wignall Worst of Times vii. 166 The principal victims were the archaeocyathids, a group of heavily calcified sponges that constructed large, highly diverse reefs in the Early Cambrian.

B. adj.

Of the nature of or resembling an archaeocyathid; containing archaeocyathids.

ΚΠ

1910 T. G. Taylor Archæocyathinæ from Cambrian of S. Austral. iv. 174 It seems probable that the Archæocyathid animal, in all its varied forms, was analogous to a single ‘sponge person’.

1974 Nature 8 Feb. 397/2 The occurrence of in situ archaeocyathid limestones in the southern Argentina Range.

1992 D. E. G. Briggs & P. R. Crowther Palaeobiology 54/2 The early Ordovician sees a rise in small bioherms constructed of lithistid sponges, particularly Archaeoscyphia (somewhat archaeocyathid in appearance), and skeletal algae.

2011 A. M. Spooner Geol. for Dummies xix. 271 Finding an archaeocyathid fossil indicates that the rock layer containing these fossils was created during the more specific Cambrian period within the Paleozoic era.

This entry has been updated (OED Third Edition, December 2021).

单词	archaeocyathid
释义	archaeocyathidn.adj. Brit. /ˌɑːkɪə(ʊ)ˈsʌɪəθɪd/, U.S. /ˌɑrkioʊˈsaɪəθəd/ Forms: 1800s– archaeocyathid, 1900s– archeocyathid. Origin: A borrowing from Latin. Etymon: Latin Archaeocyathidae. Etymology: < scientific Latin Archaeocyathidae, family name (1866 or earlier) < Archaeocyathus , genus name (E. Billings 1861, in New Species Lower Silurian Fossils I. 1; < archaeo- archaeo- comb. form + classical Latin cyathus wine-cup: see cyathus n.) + -idae (see -id suffix³). Palaeontology. A. n. Any of a large and diverse group ( Archaeocyatha) of fossil sponges of the Lower Cambrian, the members of which had a calcareous skeleton, typically in the shape of a double-walled cone, and were the earliest known reef-building organisms. ΚΠ 1875 J. W. Dawson Life's Dawn on Earth vi. 161 In the earlier part of this time these [sc. Stromatoporæ] are accompanied by the Archæocyathids. 1937 Proc. Geol. Soc. Amer. 316 Further study of the Stevens series..has shown the presence of the Lower Cambrian fossils known as archeocyathids. 1978 Sci. Amer. Aug. 114/2 Archaeocyathids were probably filter feeders, and since their remains are found in coarse sediments they probably lived in moving water. 2015 P. B. Wignall Worst of Times vii. 166 The principal victims were the archaeocyathids, a group of heavily calcified sponges that constructed large, highly diverse reefs in the Early Cambrian. B. adj. Of the nature of or resembling an archaeocyathid; containing archaeocyathids. ΚΠ 1910 T. G. Taylor Archæocyathinæ from Cambrian of S. Austral. iv. 174 It seems probable that the Archæocyathid animal, in all its varied forms, was analogous to a single ‘sponge person’. 1974 Nature 8 Feb. 397/2 The occurrence of in situ archaeocyathid limestones in the southern Argentina Range. 1992 D. E. G. Briggs & P. R. Crowther Palaeobiology 54/2 The early Ordovician sees a rise in small bioherms constructed of lithistid sponges, particularly Archaeoscyphia (somewhat archaeocyathid in appearance), and skeletal algae. 2011 A. M. Spooner Geol. for Dummies xix. 271 Finding an archaeocyathid fossil indicates that the rock layer containing these fossils was created during the more specific Cambrian period within the Paleozoic era. This entry has been updated (OED Third Edition, December 2021). < n.adj.1875
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