Paragnath


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Par´ag`nath

    (păr´ăg`năth)
n.1.(Zool.) Same as Paragnathus.
Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
References in periodicals archive ?
splendida two patterns are recognized for area VI despite the fact there is usually a very low variation in paragnath number in this area (Gonzalez-Escalante & Salazar-Vallejo, 2003; Conde-Vela & Salazar-Vallejo, 2015).
Grube (1840: 73-74) studied Rathke's material and added some features to the earlier description, especially regarding the chaetal blades and paragnath arrangement on the pharynx, but made no further comment about its identity.
As in all other decapods, the mouth apparatus of Palaemon adspersus consists of maxillipeds 1-3 (Mxpl-3), maxillae 1-2 (Mx 1-2), mandible, paragnath (not visible in Fig.
Morphological differentiation in the ragworm, Hediste diversicolor (Polychaeta, Nereididae), as revealed by variation of paragnath number and distribution.
There is a small oval of sixteen pectinate paragnaths in area II while in area III there are 4 pectinate paragnaths.
in described on the basis of eight syntype specimens (six atokous and two heteronereis) collected in Bahia Chetumal, Mexican Caribbean coast, and the variability in the paragnath numbers in the pharynx is established using 180 specimens; paragnath numbers are I:10(SD=1.9); 11:30 (SD=2.6); III:41 (SD=5.2); IV:29 (SD=3.5), V:I, VI:4, VII-VIII: >30.
Another 180 complete specimens were studied in order to evaluate the variability in paragnath numbers in the pharynx, they were collected in the same locality in different dates (26 in June, 21 in July, 20 in August, 26 in September, and 87 in October).
tenuimana have a mouth apparatus composed of six pairs of mouthparts plus labrum and paragnaths (upper and lower lips).
The basic limb-pattern for Eucrustacea (the condition in the stem species to all recent Crustacea) was a labrum, paired paragnaths, and two pairs of mouthparts (mandibles and maxillae 1), followed by a large number of more-or-less similar limbs (Walossek, 1998).
The two ventrally directed lobes of the paragnaths [ILLUSTRATION FOR FIGURES 2, 3, 4E OMITTED] form the posterior lateral borders of the preoral chamber.
It has been observed that in at least some crustaceans the paragnaths are mobile and are mechanically coupled with the mandibles (Wales, 1982).