exopodite

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exopodite

[ek′säp·ə‚dīt]
(invertebrate zoology)
The outer branch of a biramous crustacean appendage.
References in periodicals archive ?
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.
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.
Latin adjective magnifoliatus, "large-leafed," in reference to greatly expanded exopodites of female's first three pairs of pleopods.
These data are used to validate several morphological metrics (relative exopodite length, ovigerous condition) of functional sexual maturity.
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.
squammosus exhibit a disproportionately long first left exopodite was 47.
1B) by the exopodites of the second and third maxillipeds.
As previously described in lobsters (Homarus americanus), the exopodites of the first maxillipeds do not contribute to these lateral gill currents in snapping shrimp, whereas in crayfish (Procambarus clarkii) these appendages are also involved (Breithaupt, 1998).
The exopodites are paddle-like, with a fringe of setae (Herrick, 1909), and while this is an efficient arrangement for slow sw imming (Laverack et al.
Because the hyperextended position is held for such a long time preceding flexion (127 [pm] 7 ms), therefore delaying displacement, the putative advantage it confers to streamlining the exopodites comes at a cost to a budget of total tailflicking time.
The lack of any withdrawal reflexes in the exopodite suggests that the exopodites lack sensory innervation, but this requires further investigation.
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.