Glauxinema aquaticum

Contents

Rev: 01/17/2020

•  Small, slender nematodes.
• Cuticle thin, with fine transverse striation and 24-26 longitudinal ridges.
• Anterior end of body tapering. Head flattened anteriorly.
• Lips absent. Six short setiform papillae surround oral opening.
• Stoma narrow, 2.1-2.2 times as long as head width. Cheilostom with 12 strongly cuticu-larized curved ribs. Gymnostom in shape of wide ring. Stegostom with large, mobile, claw-like dorsal tooth, its apical end bifurcated.
• Right subventral denticle small, thin. In left subventral position teeth and denticles absent. Stegostom in shape of long cylinder, 1.3-1.5 times as long as its anterior part.
• Amphid openings small, ellipsoidal, situated at the level of dorsal tooth.
• Esophagus slender, sharply divided into two sections: anterior muscular section and posterior glandular section. Anterior part of esophagus 1.4-1.6 times as long as its posterior section.
• Excretory pore situated posterior to nerve ring.
• Cardia narrow, muscular.
• Rectum 1.3-1.7 times as long as anal body diameter. 
• Tail long, strongly tapering at base, thereupon thin and filiform.

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

• Gonads didelphic, amphidelphic; ovaries antidromous. Ovarial bend long, almost reaching vulva.
• Vulva preequatorial, in the shape of ellipsoidal slit.
• Vulval lips not cuticularized, not protruded.
•  Vagina short.
•  Uterus containing one or two eggs, measuring 45-53 × 20-23 μm.
  

Males:  

•  General appearance similar to that of female, size smaller.
• Cuticle thin, with fine transverse striation and 24-26 longitudinal ridges.
• Head with four supplementary setae about 1.0- 1.2 μm long situated posterior to six labial setiform papillae.
• Structure of stoma and esophagus similar to those of female.
• Amphid openings in the shape of small transverse ellipse situated at the level of dorsal tooth.
•  Testis simple.
• Spicules slender, ventrally curved, with rounded capituli; their apices pointed. Spicules 1.5 times as long as cloacal body diameter.
• Gubernaculum 2.3-2.5 times shorter than spicules.
• Ten pairs of sexual setiform papillae: 3 pairs precloacal and 7 pairs postcloacal (caudal).
•  Bursa  rudimentary
   
  from Gagarin and Thanh, 2006