orbitolineadj.n.
/ɔːˈbɪtəlʌɪn/, /ɔːˈbɪtl̩ʌɪn/, U.S. /ɔrˈbɪdələn/, /ɔrˈbɪdəˌlaɪn/ Palaeontology.
A. adj.
Originally: of, relating to, or resembling the extinct genus Orbitolina of foraminiferans. Later: = orbitolinid adj.
ΘΚΠ
the world > animals > invertebrates > protozoa > class Sarcodina > order Rhizopoda > [adjective] > relating to Foraminifera > of genus Orbitolites
orbitoline1861
1861 Philos. Trans. 1860 (Royal Soc.) 150 535 A type of structure that is intermediate between the Rotaline group..and the Orbitoline.
1879 Encycl. Brit. IX. 376/2 From this simple undivided spire we may pass along two divergent lines,..the latter again leading us to the orbitoline [type].
1988 Philos. Trans. (Royal Soc.) A. 327 59 The whole succession is overlain by clastics and limestones yielding Aptian to Albian (upper Lower Cretaceous) orbitoline foraminiferans.
1990 Cretaceous Res. 11 247 The second transgression resulted in the formation of typical ‘Urgonian’ deposits with their characteristic fauna of corals, stromatoporoids, chaetetids, algae, rudists and orbitoline foraminifera.
B. n.
Originally: a foraminiferan of this genus. Later: = orbitolinid n.
ΘΚΠ
the world > animals > invertebrates > protozoa > class Sarcodina > order Rhizopoda > [noun] > suborder Foraminifera > member of > fossil of genus Orbitolites
orbitolite1849
orbitoline1883
1883 W. B. Carpenter in Athenæum 15 Dec. 780/2 Absence of any distinguishable differentiation in the parts of the sarcodic body of even the most complex orbitolines.
1982 Oil & Gas Jrnl. (Nexis) 19 July 205 Orbitolines probably lived in subtropical and tropical waters which were clear, shallow, warm (15-35 degrees C.), and of normal salinity.
This entry has been updated (OED Third Edition, September 2004; most recently modified version published online March 2022).
<
adj.n.1861