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The Terminal Protonephridial Complex of Haplopharynx rostratus (Platyhelminthes, Haplopharyngida)
Author(s) -
Rohde Klaus,
Watson Nikki A.
Publication year - 1998
Publication title -
acta zoologica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.414
H-Index - 37
eISSN - 1463-6395
pISSN - 0001-7272
DOI - 10.1111/j.1463-6395.1998.tb01282.x
Subject(s) - terminal (telecommunication) , biology , vesicle , cytoplasm , golgi apparatus , vacuole , microbiology and biotechnology , membrane , anatomy , biochemistry , telecommunications , endoplasmic reticulum , computer science
The terminal protonephridial complex of Haplopharynx rostratus consists of three terminal cells. There are no weirs consisting of ribs connected by a filtration “membrane”, but some cytoplasmic outgrowths into the lumen of the terminal cells. Excretion is by exocytotic vesicles. The terminal cells also contain Golgi complexes and large membrane‐bound vacuoles containing electron‐dense material. The ciliary bundles (flames) of terminal cells 2 and 3 protrude into the lumen of the centrally located terminal cell I. The complex is surrounded by a sheath containing numerous filaments. The terminal complex of H. rostratus resembles that of the macrostomid Paromalostomum proceracauda , lending support to the view that the two taxa are closely related. © 1998 The Royal Swedish Academy of Sciences. Published by Elsevier Science Ltd. All rights reserved