pseudolabiumn.
/ˌs(j)uːdəʊˈleɪbɪəm/, U.S. /ˌsudoʊˈleɪbiəm/ Zoology.
A mouthpart in various invertebrates; spec.: †(a) a gnathochilarium of a millipede (obsolete); (b) each of a pair of lobes or flaps formed on either side of the mouth by projections of the lining of the buccal cavity in nematodes of the order Spirurida.
ΚΠ
1884 A. S. Packard in Proc. Amer. Philos. Soc. 1883–4 21 201 The sternite of the sub-basilar plate [in Chilognaths] is usually a very large plate..with teeth on each side, and forms the ‘labium’ of Newport. It may..be termed the ‘pseudolabium’.
1927 Jrnl. Parasitol. 14 64 Hitherto undescribed pseudolabia occurring on a new nema parasite in Millipeds.
1968 Trans. Amer. Microsc. Soc. 87 191 Chitwood..placed Ortlepp's species in the genus Spirura because of the form of the pseudolabia and the presence of a ventral boss.
2004 Jrnl. Helminthol. 78 33 This spirurid differs from the nearest genus and species..in the shape of the pseudolabia, shape of the buccal capsule and absence of a large cephalic vesicle.
Derivatives
ˌpseudoˈlabial adj.
ΚΠ
1890 Cent. Dict. Pseudolabial, of or pertaining to the pseudolabium of a myriapod.
1962 Trans. Amer. Microsc. Soc. 81 278 It was found that the pseudolabial teeth of M[astophorus] muris are actually serrations of the membrane covering each labial lobe.
1999 Jrnl. Parasitol. 85 898/2 Another gecko harbored 1 encapsulated larva of Abbreviata sp. (diagnosis on the basis of the presence of double submedian pseudolabial teeth).
This entry has been updated (OED Third Edition, September 2007; most recently modified version published online March 2022).
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n.1884