Family: Qudsianematidae

Revised 01/29/24

Classification:
 

   Enoplea

      Dorylaimida
       

         Qudsianematidae Jairajpuri, 1965

• Wide range of body sizes, 0.3-6mm

• Cuticle smooth or finely striated

• Lateral chords often have glands or pores

• Lip region usually sopmewhat offset, lips well-devloped.

• Large cup-shaped amphid apertures.

• Odontostyle straight, dorylaimoid; aperture usually about 1/3 of odontostyle length.

• Guiding ring thin.

• Esophagus muscular throughout length.

• Female gonad mostly diovarial, amphidelphic; rarely monovarial.

• Male with two testes, spicules dorylaimoid; ventromedian supplenets in series.

• Tail similar in both sexes, conoid or short and rounded.

Ref Andrássy, 2009

Remarks:

Based on observations of variability in the postembryonic development of the caudal region of Dorylaimida, and on molecular analysis, Pena-Santiago and Alvarez-Ortega (2014) proposed that the family Qudsianematidae be assigned as a subfamily of the Dorylaimidae emended the diagnosis of the subfamily Qudsianematinae as follows:

• Variable size.
• Cuticle dorylaimoid
• Lip region ranging from continuous with body contour to deeply offset
• Odontostyle well developed; aperture up to 50% of odontostyle length
• Guiding ring simple
• Odontophore rod-like, no flanges
• Basal part of pharynx about half of total pharynx length
• Female didelphic, amphidelphic; pars refringens vaginae always present
• Vulva usually a transverse slit
• Caudal region conical with acute tip, similar in both sexes and in juvenile stages, often curved ventrad (no caudal sexual dimorphism), never rounded
• Males with robust spicules and ventromedian supplements

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References:

Andrássy, I. 2009. Free-living Nematodes of Hungary III.  Hungarian Natural History Museum, Budapest. 608p.

Pena-Santiago, R. and S. Alvarez-Ortega. 2014. An integrative approach to assess the phylogeny and the systematics of rounded-tailed genera of the subfamily Qudsianematinae (Nematoda, Dorylaimida). Zoologica Scripta 43:418-428.

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