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THE FINE STRUCTURE OF THE PORE CANALS OF THE TALITRID AMPHIPOD HYALE NILSSONI RATHKE

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ABSTRACT The pore canals of the talitrid amphipod Hyale nilssoni are described by transmission electronmicroscopy and compared with the pore canals previously described for three species of the gammarid amphipod Gammarus. Structural similarities between the pore canals of the two genera include the presence of an elongate tubular portion that dilates near the junction of the exocuticle with the inner epicuticle, and a cavity in the epicuticle that provides continuity between the animal's surface and the rest of the pore canal. Differences include the presence, in Hyale, of a greater degree of fusion between adjacent elements of the system, and of an anastomosing arrangement of tubules that occupies a series of narrow spaces just below the inner epicuticle. These tubules are derived from the most distal portions of the dilatations and communicate with the cavities in the epicuticle by narrow channels. The significance of the pore canals of Hyale is discussed.

Affiliations: 1: Department of Biology, University of New Brunswick, Saint John, New Brunswick E2L 4L5, Canada.

10.1163/1937240X85X00416
/content/journals/10.1163/1937240x85x00416
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/content/journals/10.1163/1937240x85x00416
2017-11-21

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