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A new glandular sensory organ inCatanema sp. (Nematoda, Stilbonematinae)

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Summary

A new multicellular glandular sensory organ is described forCatanema sp. (Nematoda, Stilbonematinae). The organs terminate in setae and are distributed in six longitudinal rows along the body. Two types of glandular cells (type A and type B), one monociliary sensory cell and one undifferentiated epidermal cell are combined in the basiepidermal organ. A comparison of epidermal glands as well as sensory organs in Nematoda is made. A causal relationship between the development of such complex, large and numerous glandular sensory organs and the occurrence of species-specific, symbiotic epibacteria inCatanema sp. seems probable, although there is no simple correlation between the distribution of these organs and epibacteria. A mucous cover over the bacterial layer, released by the glandular sensory organs, may create a microenvironment for the interaction between epibionts and host.

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Abbreviations

a :

amphid

A1–A4 :

type 1–4 granules of type A gland cell

an :

annuli

b :

bacteria

B1–B3 :

type 1–3 granules of type B gland cell

bl :

basal lamina

bp :

basal part of seta

bz :

basal zone of cuticle

c :

cuticle

ca :

canal

cg :

caudal gland

ci :

cilium

cz :

cortical zone of cuticle

d :

dictyosomes

e :

epidermis

e co :

extracellular coat

em :

extracellular matrix

ep :

epicuticle

f :

filaments

gcA :

type 1 gland cell

gcB :

type 2 gland cell

i lp :

inner labial papillae

m :

mitochondrion

me :

membranes of type 2 gland cell

mo :

mouth opening

mz :

median zone of cuticle

n :

nucleus

nu :

nucleolus

p :

process

pv :

primary vesicle of type A gland cell

r :

ribosomes

s :

seta

sc :

sensory cell

sp :

secretory product

tj :

tight junction

tp :

terminal part of seta

uc :

undifferentiated epidermal cell

va :

vacuoles or vesicles of epidermal cells

ve :

vesicles of sensory cell

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Authors and Affiliations

  1. Institut für Zoologie, Abteilung für Meeresbiologie und Ultrastrukturforschung, Universität Wien, Althanstrasse 14, A-1090, Wien, Austria

    Monika Nebelsick, Michael Blumer, Rudolf Novak & Jörg Ott

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  1. Monika Nebelsick
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  2. Michael Blumer
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  3. Rudolf Novak
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  4. Jörg Ott
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Nebelsick, M., Blumer, M., Novak, R. et al. A new glandular sensory organ inCatanema sp. (Nematoda, Stilbonematinae). Zoomorphology 112, 17–26 (1992). https://doi.org/10.1007/BF01632991

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  • DOI: https://doi.org/10.1007/BF01632991

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