mixonephridiumn.
/ˌmɪksəʊnᵻˈfrɪdɪəm/, U.S. /ˌmɪksoʊnəˈfrɪdiəm/ Zoology.
In many polychaetes: a combined nephridium and coelomoduct in which the coelomic end of the nephridium is completely fused with the coelomostome.
ΘΚΠ
the world > animals > invertebrates > subkingdom Metazoa > grade Triploblastica or Coelomata > phylum Annelida > [noun] > member of > parts of > combining nephridium and coelomoduct
mixonephridium1946
mixonephrium1958
1946 E. S. Goodrich in Q. Jrnl. Microsc. Sci. 86 119 When, as in the majority of Polychaeta, the coelomostome is so completely fused to the inner end of the nephridium as to form an apparently simple large-funnelled organ..it may be called a mixonephridium... This new name is proposed to draw attention to the difference between these two kinds of organ (the metanephridium, and the compound nephromixial organ).
1972 M. S. Gardiner Biol. Invertebr. xiii. 505/2 In a mixonephridium, the nephrostome has presumably become occluded and lost.
1988 Compar. Biochem. & Physiol. C. 91 265/1 For those instances in which the genital funnel becomes grafted upon the nephridium so as to form the entire ciliated funnel of the composite organ,..Goodrich devised the term ‘mixonephridium’.
This entry has been updated (OED Third Edition, September 2002; most recently modified version published online March 2022).
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n.1946