exopodite


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exopodite

[ek′säp·ə‚dīt]
(invertebrate zoology)
The outer branch of a biramous crustacean appendage.
References in periodicals archive ?
These setae are organized in groups of 3, with an apical orifice, and are set between each plumose seta of the exopodite (Fig.
It differs from the known six, conspecific subspecies in the combination of the following characters: structure of exopodite of antennae and mandibular palp, presence of inner seta on the first segment of legs 2, and equipment of abdominal somites.
carpathicus Exopodite A2 2-Segmented 1-Segmented 1-Segmented with with 4 setae with 4 setae 4 setae Mandibular 1-Segmented 1-Segmented 1-Segmented with palp with 4 setae with 5 setae 3 setae The fast With seta With seta Without seta segment P2 Spines on Rows of spines Rows of spines -- abdominal discontinuous discontinuous somites in the middle in the middle on ventral on dorsal side side Presence of No No No additional differential features Distribution Estonia Arctics and South Subarctics Carpathians Features M.
Standardized metric It follows from the above that the best measure available for use was the length (in ventral aspect) of the left first exopodite.
The uropods were fully developed, with the exopodite bearing both the outer spine and distal joint.
Both species present a knob at the proximal inner corner of basipodite II, but the shape of the second segment of exopodite is different, without inner margin concavity present in this new species (see figures in Kiefer, 1936).
4); the paddle-like exopodites that are used by the larval stages to remain in the water column presumably increase drag during tailflicking.
Table I Numbers of somata counted in the ganglion following dye infusion at the distal end of the basis in animals of different stages(*) Post larva Stage I Stage II Stage III and adult Exopodite 5, 5 6, 5 5, 6, 5 Endopodite 13, 13, 14 15, 12 12, 13, 13, 12, 13, 13, 14, 15 13, 14 * These numbers demonstrate that something approaching the full complement of motor neurons is present at hatching, but they cannot be considered definitive until silver intensification and antibody staining has been completed.
The pleopods are similar to those of the type, their exopodites extending considerably beyond the margins of the pleomeres, the subcircular endopodites not covering the central region of the dorsal surface of the pleon.
It was shown that both lobsters and crayfish produce a great variety of flow fields by using the exopodites of the maxillipeds and by fanning the pleopods.
At the same time, the palps of the maxillipeds were moved independently, and there was rapid flicking of all the exopodites of the mouth parts.