nuculoidadj.n.

Brit.

/ˈnjuːkjᵿlɔɪd/, U.S.

/ˈn(j)ukjəˌlɔɪd/

Origin: A borrowing from Latin, combined with an English element. Etymons: Latin Nucula , -oid suffix.

Etymology: < scientific Latin Nucula, genus name (Lamarck 1799, in Mém. de la Soc. d'Hist. Nat. de Paris 87), use as genus name of classical Latin nucula small nut (see nucule n.) + -oid suffix. Compare scientific Latin Nuculoida, order name (N. D. Newell 1965 in Amer. Mus. Novitates No. 2206, after earlier Nuculacea).

Zoology and Palaeontology.

A. adj.

Originally: of, relating to, or resembling bivalve molluscs of a type represented by the nut shell Nucula. In later use: spec. of, relating to, or designating protobranch bivalve molluscs of the order Nuculoida, which includes mainly deposit-feeding species attested in the fossil record from the Ordovician period onwards, and often regarded as among the most primitive extant bivalves.

ΚΠ

1861 1st Biennial Rep. Progress Geol. Surv. Michigan 87 The Nuculoid shells have not the pallial sinus nor posterior elongation required by their assignment to the genus Leda.

1890 Amer. Naturalist 24 1141 It is probable that Nucula, or a nuculoid form, is the type we are seeking as the ancestral radical represented by the completed prodissoconch in the development of Avicula, Perna, Ostrea, Pecten, and their allies.

1913 Amer. Naturalist 47 198 The recent Pecten has strongly marked ears, but the young shell is strikingly different, first having a rounded nuculoid form.

1968 Science 15 Mar. 1231/3 This nearshore faunal association..was consistently dominated by large numbers of ‘infaunal’ detritus-feeding nuculoid bivalves.

1996 Paleobiology 22 109/2 Purely trophic explanations are insufficient to explain the survival of deposit feeders such as nuculoid bivalves through the end-Cretaceous crisis.

B. n.

A nuculoid mollusc.

ΘΚΠ

the world > animals > invertebrates > subkingdom Metazoa > grade Triploblastica or Coelomata > phylum Mollusca > [noun] > miscellaneous types > other types of mollusc

squame1393

shell-worm1591

spout-fish1594

pentadactyl1601

sea cucumber1601

pirot1611

worm1621

nun-fish1661

scarlet mussel1672

sea-navel1678

redcap?1711

strawberry cockle1713

sea-finger1748

sea-nail1748

sea-acorn1755

coneya1757

compass1776

bubble shell1818

glass-shell1851

golden comb1857

cryptodont1893

nuculoid1960

1960 W. H. Easton Invertebr. Paleontol. ix. 342 Ctenodonta (Ordovician and Silurian) is the oldest of the nuculoids.

1974 Science 29 Nov. 829/3 Nuculoids may have greater generic durations than suspension feeders because they exploit a relatively stable food source.

1997 Jrnl. Biogeogr. 24 4/1 There has been a progressive build-up through time [in the Recent Antarctic fauna] of the essentially deposit-feeding nuculoids and nuculanoids.

This is a new entry (OED Third Edition, December 2003; most recently modified version published online March 2022).

单词	nuculoid
释义	nuculoidadj.n. Brit. /ˈnjuːkjᵿlɔɪd/, U.S. /ˈn(j)ukjəˌlɔɪd/ Origin: A borrowing from Latin, combined with an English element. Etymons: Latin Nucula , -oid suffix. Etymology: < scientific Latin Nucula, genus name (Lamarck 1799, in Mém. de la Soc. d'Hist. Nat. de Paris 87), use as genus name of classical Latin nucula small nut (see nucule n.) + -oid suffix. Compare scientific Latin Nuculoida, order name (N. D. Newell 1965 in Amer. Mus. Novitates No. 2206, after earlier Nuculacea). Zoology and Palaeontology. A. adj. Originally: of, relating to, or resembling bivalve molluscs of a type represented by the nut shell Nucula. In later use: spec. of, relating to, or designating protobranch bivalve molluscs of the order Nuculoida, which includes mainly deposit-feeding species attested in the fossil record from the Ordovician period onwards, and often regarded as among the most primitive extant bivalves. ΚΠ 1861 1st Biennial Rep. Progress Geol. Surv. Michigan 87 The Nuculoid shells have not the pallial sinus nor posterior elongation required by their assignment to the genus Leda. 1890 Amer. Naturalist 24 1141 It is probable that Nucula, or a nuculoid form, is the type we are seeking as the ancestral radical represented by the completed prodissoconch in the development of Avicula, Perna, Ostrea, Pecten, and their allies. 1913 Amer. Naturalist 47 198 The recent Pecten has strongly marked ears, but the young shell is strikingly different, first having a rounded nuculoid form. 1968 Science 15 Mar. 1231/3 This nearshore faunal association..was consistently dominated by large numbers of ‘infaunal’ detritus-feeding nuculoid bivalves. 1996 Paleobiology 22 109/2 Purely trophic explanations are insufficient to explain the survival of deposit feeders such as nuculoid bivalves through the end-Cretaceous crisis. B. n. A nuculoid mollusc. ΘΚΠ the world > animals > invertebrates > subkingdom Metazoa > grade Triploblastica or Coelomata > phylum Mollusca > [noun] > miscellaneous types > other types of mollusc squame1393 shell-worm1591 spout-fish1594 pentadactyl1601 sea cucumber1601 pirot1611 worm1621 nun-fish1661 scarlet mussel1672 sea-navel1678 redcap?1711 strawberry cockle1713 sea-finger1748 sea-nail1748 sea-acorn1755 coneya1757 compass1776 bubble shell1818 glass-shell1851 golden comb1857 cryptodont1893 nuculoid1960 1960 W. H. Easton Invertebr. Paleontol. ix. 342 Ctenodonta (Ordovician and Silurian) is the oldest of the nuculoids. 1974 Science 29 Nov. 829/3 Nuculoids may have greater generic durations than suspension feeders because they exploit a relatively stable food source. 1997 Jrnl. Biogeogr. 24 4/1 There has been a progressive build-up through time [in the Recent Antarctic fauna] of the essentially deposit-feeding nuculoids and nuculanoids. This is a new entry (OED Third Edition, December 2003; most recently modified version published online March 2022). < adj.n.1861
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