gnathopod


Also found in: Dictionary, Wikipedia.

gnathopod

[′nā·thə‚päd]
(invertebrate zoology)
Any of the crustacean paired thoracic appendages modified for manipulation of food but sometimes functioning in copulatory amplexion.
References in periodicals archive ?
Gnathopod 1 subchelate; basis length more than three times breadth; propodus margins subparallel.
Besides that, the examined material presents some other morphological variations: gnathopod 1 basis 4x longer than wide, versus 3.
In a previous study of two Hyalella ecotypes in southeast Michigan I found that the influence of gnathopod size on male reproductive success differed between ecotypes (Wellborn, 1995b).
Here I explore the role of gnathopod characteristics in male reproductive success by measuring aspects of sexual selection (pairing success) and natural selection (success in mating with larger, more fecund females) on gnathopod size in the two amphipod ecotypes.
I analyzed major differences between the morphotypes with analysis of variance, with populations within a morphotype as replicates and either population means (body size, size at maturity and egg size) or size-adjusted trait values (antennal segment number, spine length, egg number and gnathopod width) as data.
Males of the two morphotypes did not differ in size-specific values of antennal segment number or gnathopod size, but did differ in spine length.
Sexual dimorphism in amphipods: the role of male posterior gnathopods revealed in Gammarus pulex.
The use of the male's gnathopods during precopulation in some gammaridean amphipods.
femorata and other ampithoids, the recently spun silk threads are additionally manipulated by pereopods 1 and 2, the gnathopods (e.
volutator switches to filter feeding by using the long setae on the second pair of gnathopods to retain suspended particles brought into the tube by the pleopodal current.
The position of the long V-shaped plumose setal filter on the second pair of gnathopods effectively ensures that all water runs through the filter without any bypass (Fig.
The gnathopods of the cyprid form an oral cone, which opens to the ventral surface of the cephalon [ILLUSTRATION FOR FIGURES 1, 2, 12A OMITTED].