endopodite

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Related to endopodites: Scaphognathite, Exopodite

endopodite

[en′däp·ə‚dīt]
(invertebrate zoology)
The inner branch of a biramous crustacean appendage.
References in periodicals archive ?
Pleon of five incompletely separated pleomeres, first four bearing very slender biramous pleopods, their endopodites much smaller.
Five pairs of biramous pleopods nearly symmetrical on opposite sides of body, endopodites of first three pairs greatly expanded into large subrectangular fleshy lobes extending far to sides, other exopodites and all endopodites much reduced and mostly extending posteriorly somewhat beyond margins of lateral plates; pleopods covering all but small medioanterior region of pleon ventrally.
Specifically, its body is proportionately much broader; its barbula is very simple, rather than having two well-developed projections on each side; the palp articulates distinctly with the maxilliped, rather than being fused with it; it has six pleomeres, not five, the sixth being much reduced, inset and of unique shape; and the greatly expanded endopodites of the pleopods are like none known for any other bopyrid species.
The transverse striation is due to the endopodite movements which are made, above all, perpendicularly to the animal displacement, as one can see it from our video film.
Each maxillule [ILLUSTRATION FOR FIGURE 4C OMITTED] has a three-segmented endopodite located distolaterally; a large, toothed, mesially directed basal endite; and a smaller setose coxal endite that is also mesially directed.
The endopodite of each maxillule is muscularized and seems to be capable of some independent motion both in the anterior-posterior and mesial-lateral directions.
The radically different morphologies of the endopodite and coxal and basal endites facilitate the plasticity of functions that this appendage is capable of performing.
Although the cell counts are only approximate, they indicate that about the full complement of motor axons is present in the endopodites of the larvae (7); but these neurons do not appear to be connected centrally to the rhythmic generators responsible for the locomotory rhythm.
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.