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n.1.(Zool.) A gnathopodite or maxilliped. See Maxilliped.
References in periodicals archive ?
Lysianassoid amphipods are characterized, in a variable way, by antenna 1 with peduncle short and robust, and flagellum with callynophore; antennae with calceoli; rostrum reduced; gnathopod 2 with a minute dactylus, with article 3 elongate and article 6 mitten-shaped (Senna & Serejo, 2008).
Gnathopod 1 subchelate to parachelate; coxa small; merus and carpus not rotated; carpus short; propodus large, palm straight to convex; dactylus slightly curved, not hidden by setae.
glacialis has a forceps-like dactylus on its gnathopod 2 that was interpreted as allowing the species to collect small particles such as diatoms (Arndt et al.
In this study I examined males of two ecotypes of freshwater amphipods in the genus Hyalella to determine (1) the degree and form of reproduction-mediated selection acting on gnathopod size, (2) the importance of fluctuating asymmetry in gnathopods for mating success and (3) differences between ecotypes in gnathopod size.
In addition to phylogeny, natural selection based on functional significance of gnathopods is also likely to shape patterns of gnathopod dimorphism within taxonomic lineages.
Traits that were generally correlated with body size within populations (antennal segment number, spine length, gnathopod size, and egg number) were size-adjusted by calculating the expected trait value for a population at the overall mean body size for all Hyalella in the study (0.
At the end of the experiment, the sex of each individual was determined using the size and shape of its first and second pairs of gnathopods, which are sexually dimorphic in amphipods (Hume et al.
A male grabs a female with its gnathopods and the pair remains attached until the female molts.
The active manipulation of the newly spun silk threads by the gnathopods (see above) persisted throughout the process.
fasciatus are limited to a detrital diet because of the inability of their gnathopods or similar feeding mouthparts to handle larger food items (e.
volutator produces a water current through its tube that brings suspended particles to the long setae fringing the gnathopods, thus indicating that it may also employ a filter-feeding mechanism.
However, we identified three divisions in this region (from two of the three preparations sectioned in the horizontal plane), which might reflect the presence of the three pairs of gnathopods that can be seen with either scanning electron microscopy or light microscopy [ILLUSTRATION FOR FIGURE 12B OMITTED].