Rhabditophanes schneideri

 

Contents

 

Rev 12/17/2024

  Classification Biology and Ecology
Morphology and Anatomy Life Cycle
Return to Rhabditophanes Menu   Ecosystem Functions and Services
Distribution Management
Return to Alloionematidae Menu Feeding  References
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Classification:

Class:    Chromadorea
SubOrder: Rhabditia
Order:    Rhabditida 
SubOrder Tylenchina
Superfamily  Strongyloidoidea
Family:  Alloionematidae

  Rhabditophanes schneideri (Butschli, 1873) Goodey, 1953

Type species of the genus,

Synonyms:

Rhabditis schneideri Butschli, 1873

Rhabditophanes insolitus Fuchs, 1930

Cheilobus quadeilabiatus Cobb, 1924

Cheilobus insolitus (Fuchs, 1930) Goodey, 1953

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Morphology and Anatomy:


. Rhabditophanes schneideri  A, Lip region. B, Pharyngeal region. C, Female gonad.
D, Female posterior. E, Female. F, Male. G, Male posterior  H, Gubernaculum. I, Spicule.
From Seddiqi et al., 2016

   

Male:  

  • Body curved ventrally, “J”-shaped after fixation.
  • Monorchic, with testis ventrally reflexed.
  • Three precloacal pairs of gental papillae and five postcloacal pairs, two subventral and three subdorsal. 
  • Spicules ventrally curved, shorter than cbd; manubrium rounded, offset from short calomus; lamina ventrally curved and weakly developed velum.
  • Gubernaculum with a proximal globular part.
  • Tail conical, curved ventrad, with slender terminal spike. Phasmids at 46% of tail length.

Ref: Seddiqi et al., 2016

Female:  

  • Body slightly curved ventrad after fixation. Cuticle striated, lateral fields not visible.
  • Lip region offset, with six rounded lips, bearing small papillae.
  • Stoma panagrolaimoid, with distinct cheilo-, gymno- and stegostom;
  • Pharynx rhabditoid; pharyngeal corpus about 2.5-3.5 times the isthmus length, distinctly swollen; isthmus robust, wider anteriorly and distinctly separated from corpus; basal bulb spheroid, with prominent grinder.
  • Cardia conoid, surrounded by intestinal tissue.
  • Nerve ring at isthmus level, secretory-excretory pore opening at isthmus level,
  • Didelphic-amphidelphic; ovaries dorsally reflexed, lacking posterior flexures; oviduct long, tubular, separated from the uterus by a constriction;
  • Sspermatheca not differentiated; uteri swollen, each twice as long as the corresponding body diameter; vagina with thin walls, one-third of the body diameter long;
  • Vulva with slightly protruding lips, located posterior to middle part of body.
  • Rectum 1.3 times the abd.
  • Tail conical, slightly concave ventrally with acute end. Phasmids at 34% of tail length.

 


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

 

 
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Distribution:

Reported from several locations as well as Iran. Often associated with beetles (Nemat et al., 2016).

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Feeding:

      Bacterivore

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Biology and Ecology:

   Phoretic and probably necromenic with beetles.  Also, R. schneideri has  been reported to be phoretic on cave pseudoscorpions (Nermut et al., 2016).

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Life Cycle:

 

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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Management:

 

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References:

Butschli O. 1873. Beitrage zur Kenntnis der freilebenden Nematoden. Nova Acta der Kaiserlich Leopoldinisch-Carolinische Deutschen Akademie der Naturforscher. 36:1-124.

Chitwood B.G, McIntosh A. 1934. A new variety of Alloionema (Nematoda: Diplogasteridae), with a note on the genus. Proceedings of the Helminthological Society of Washington. 1:37-38.

Fuchs G. 1930. Neue an Borken- und Rüsselkäfer gebundene Nematoden, halbparasitische und Wohnungseinmieter. Freilebende Nematoden aus Moos und Walderde in Borken- und Rüsselkäfergängen. Zoologische Jahrbücher (Systematik). 59:505-646.

Goodey T. 1953. On certain eelworms, including Butschli’s Tylenchus fungorum, obtained from toadstools. Journal of Helminthology. 27:81-94.

Nermut, J., V. Puza and Z. Mracek. 2016. Neoallionema indicum n. sp. (Nematoda: Alloionematidae), a new Alloionematid from India. Nematology 16:949-962.

Seddiqi, E., Shokoohi, E., Divsalar, N., Abolafia, J. 2016. Descriptions of four known species of the families Panagrolaimidae and Alloionematidae (Nematoda: Rhabditida) from Iran. Tropical Zoology 29:87-110. , http://dx.doi.org/10.1080/03946975.2016.1177384

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Copyright © 1999 by Howard Ferris.
Revised: December 17, 2024.