monomyarianadj.n.
/ˌmɒnə(ʊ)mʌɪˈɛːrɪən/, U.S. /ˌmɑnəˌmaɪˈɛriən/ Zoology.
A. adj.
Of a bivalve mollusc: having only one (posterior) adductor muscle; relating to or characteristic of such a mollusc. Formerly also: †belonging to the former group Monomyaria of bivalves (obsolete).
ΘΚΠ
the world > animals > invertebrates > subkingdom Metazoa > grade Triploblastica or Coelomata > class Pelecypoda or Conchifera > [adjective] > of bivalve molluscs or shells > belonging to the group Monomyaria
monomyarian1836
monomyary1836
monomyarious1852
1836 G. P. Deshayes in Todd's Cycl. Anat. & Physiol. I. 696/1 It [sc. the oesophagus] either occurs or is wanting indifferently among the individual members of the dimyarian and monomyarian families.
1851 S. P. Woodward Man. Mollusca i. 48 The monomyarian bivalves lie habitually on one side.
1862 J. H. Burton Book-hunter (1863) 2 If you make an allusion to monomyarian malacology, it will not naturally be supposed to have reference to the cooking of oyster sauce.
1903 Philos. Trans. (Royal Soc.) B. 195 179 In spite of the extreme probability..that the monomyarian condition has been evolved in several families quite independently, there is still a wide-spread mistrust of any scheme of classification which involves the dissociation of the monomyarian forms.
1958 J. E. Morton Molluscs x. 185 (caption) Series of lamellibranchs showing the development of various monomyarian forms.
1993 E. N. K. Clarkson Invertebr. Palaeontol. & Evol. (ed. 3) viii. 203/1 In the swimming scallop Pecten..the anterior adductor has vanished altogether and there remains only the large monomyarian posterior adductor.
B. n.
A bivalve mollusc of a type having only one (posterior) adductor muscle (e.g. an oyster).
ΘΚΠ
the world > animals > invertebrates > subkingdom Metazoa > grade Triploblastica or Coelomata > class Pelecypoda or Conchifera > [noun] > bivalves > of particular type > bivalve of the group Monomyaria
monomyarian1837
monomyary1842
1837 Penny Cycl. VII. 433/2 The common oyster will serve as an example of the Monomyarians.
1881 Cassell's Nat. Hist. V. 232 We may..notice in the valve of the Monomyarian a simple unbroken line.
1953 Philos. Trans. (Royal Soc.) B. 237 361 All monomyarians belonging to the Anisomyaria have lost primary pallial attachments.
1982 Lethaia 15 184/1 Since both species are sessile monomyarians, they were most probably suspension feeders, filtering the water with gills.
This entry has been updated (OED Third Edition, December 2002; most recently modified version published online March 2022).
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adj.n.1836