Actinonema grafi		Contents		Rev: 08/24/2026
		Classification		Biology and Ecology
		Morphology and Anatomy		Life Cycle
Return to Actinonema Menu				Ecosystem Functions and Services
		Distribution		Management
Return to Chromadoridae Menu		Feeding		References
		Go to Nemaplex Main Menu		Go to Dictionary of Terminology

Classification:

Chromadorea

  Chromadoria

   Chromadorida

    Chromadoridae

Euchromadorinae

       Actinonema grafi Jensen, 1991

    Synonyms:
      

Back to Top

Morphology and Anatomy:

• Body slender, attenuating towards each end.
• Cuticle annulated and ornamentated with dots. Lateral differentiation of dots appears in posterior half of pharyngeal region as an open field then a raised lateral field to tail region. Elsewhere body cuticle has transverse bars;
• Inner labial sensilla papilliform; six outer labial sensilla setiform, 2-3 um long;  four cephalic setae 1-2 um long.
• Few somatic setae in pharyngeal region and on tail.
• Amphideal fovea a transverse loop, 10-2 um wide,
• Mouth opening surrounded by sclerotized rugae; buccal cavity with a dorsal tooth and two small subventral pro jections.
• Pharynx cylindrical, slightly expanded at both ends. Reproductive system monorchic, with one anteriorly directed and outstretched testis.

Back to Top

Distribution:

Reported from subtidal silt sediment in the East China Sea

Back to Top

Feeding:

Epistrate and sediment ingestion of micro-organisms

Back to Top

Biology and Ecology:

Back to Top

Life Cycle:

Ecophysiological Parameters:

Back to Top

Ecosystem Functions and Services:

Back to Top

Management:

Back to Top

References:

Huang, Y. and Guo, Y. 2022. Free-living Marine Nematodes from the East China Sea. Springer, Singapore and Science Press, Beijing.

Back to Top

Revised by Howard Ferris.
Revised: August 24, 2026.