Rhynchonema veronicae




Rev: 03/26/2022

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Morphology and Anatomy Life Cycle
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       Rhynchonema veronicae Bezerra, Smol & Vincx, 2014


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Morphology and Anatomy:

Ref: Bezerra et al., 2014.


  • Monodelphic-prodelphic, with outstretched ovari lying to the left side of the intestine.
  • Spermatozoa are regularly found in the spermatheca.
  • Perivulvar gland cells are present, ovejetor strongly sclerotized.
  • Vulva is sclerotized without operculum.


Rhynchonema veronicae
Male head, cheilostome, pharyngostome and amphid; anteriorly directed annule edges. b. entire male head showing anterior narrowing, amphid, nerve ring, the cardia, the inversion
point of the annules. From Bezerra et al., 2014


  • Diorchic, testes anteriorly outstretched .
  • Spicules asymmetric,  almost the same length but the right
    spicule is more robust, with strong sclerotization and is
    also more curved than the left one.
  • Posterior extremityof spicules has an arrow shape; capitulum aglobular
    shape with open extremities resembles a sickle.
  • Gubernaculum bears a sleeve with asymmetric posterodorsal apophyses.

Reported median body size for this species (Length mm; width micrometers; weight micrograms) - Click:


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Marine nematodes described from medium grain size sand in intertidal zone of exposed sandy beach, Olinda�s Isthmus, Pernambuco, Brazil.

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Economic Importance:



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Biology and Ecology:

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Life Cycle:

Spermatazoa in spermatheca and frequency of males suggests sexual reproduction.

Ecophysiological Parameters:

For Ecophysiological Parameters for this species, click If species level data are not available, click for genus level parameters
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Ecosystem Functions and Services:

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Bezerra, T.N. Smol, N. , Vincx, M. 2014. Two new species of Rhynchonema Cobb, 1920 from a Brazilian sandy beach. Mar Biodiv DOI 10.1007/s12526-014-0223-6

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Copyright © 1999 by Howard Ferris.
Revised: March 26, 2022.