neman.1
/ˈnɛmə/, /ˈniːmə/, U.S. /ˈnimə/, /ˈnɛmə/ Palaeontology.
A long, slender, tubular extension of the sicula in a graptolite.
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the world > life > biology > organism > fossil > [noun] > particular parts of
ostracite1601
horse-head1708
nucleus1734
orthoceras1734
orthoceratite1734
alveolus1747
volutite1802
strombite1811
helicite1828
turbinite1828
phragmocone1843
pro-ostracum1864
orthoceratoid1885
nema1901
1901 G. L. Elles & E. M. R. Wood Monogr. Brit. Graptolites 6 (caption) Nema.
1923 H. H. Swinnerton Outl. Palæontol. iv. 35 The first polype of Didymograptus was enclosed in a..sicula. The apex of this is sometimes in the fossil..drawn out into a long delicate tube, the nema.
1955 O. M. B. Bulman Treat. Invertebr. Paleontol. Graptolithina v. 6 Nema. Hollow threadlike prolongation of apex of prosicula by which rhabdosome was attached.
1970 R. M. Black Elements Palaeontol. xiv. 211 The sicula..is a conical structure about 1.5 mm in length. Its apex is extended as a thread-like tube, the nema.
1985 Lethaia 18 349 They are rhabdosomes in which compressed circular objects interpreted as floats are attached to the nemata.
1993 Nature 18 Mar. 209/3 How could a graptolite zooid..have left its theca and climbed for many times its own length to secrete material at the tip of the nema?
This entry has been updated (OED Third Edition, September 2003; most recently modified version published online March 2022).
neman.2
/ˈnɛmə/, /ˈniːmə/, U.S. /ˈnimə/, /ˈnɛmə/ Biology.
A nematode, esp. one that parasitizes plants.
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the world > animals > invertebrates > subkingdom Metazoa > grade Triploblastica or Coelomata > phylum Nemathelminthes > [noun] > class Nematoda > member of
roundworm1837
nematode1856
nematoid1865
bloodworm1872
heartworm1877
rhabdonema1886
palisade worm1888
kidney worm1893
tunnel-worm1895
nema1917
rhabditoid1937
1917 N. A. Cobb in Jrnl. Agric. Res. 11 27 (title) A new parasitic nema found infesting cotton and potatoes.
1917 N. A. Cobb in Jrnl. Agric. Res. 11 27 Unfortunately our knowledge of nemas, especially those attacking the roots of plants, is relatively very meager.
1931 J. H. S. Stekhoven & W. Adam (title) Freeliving marine nemas of the Belgian coast.
1970 P. Gray Encycl. Biol. Sci. (ed. 2) 598/2 A widespread misconception, even among specialists, is that nemas as a group are largely similar in form and organization.
1985 Jrnl. Econ. Entomol. 78 1437 Under severe drying conditions, some of materials had an adverse effect upon S. feltiae infective nemas.
1998 Nematropica 28 195 Cotton and soybean sustained large populations (> 500 nemas/100 cm3 soil or per root system) of the nematode in both root and soil samples.
This entry has been updated (OED Third Edition, September 2003; most recently modified version published online March 2022).
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