Order Marimerthida
Rev 08/03/2020
Order: Marimermithida
.
- Large nematodes up to 15 cm long.
- Cuticie thick and optically smooth.
- Cephalic sensilla: six papilla + ten setae.
- Uncoiled pore-Iike amphids.
- Cervical or somaric setae possibly present.
- Mouth opening triangular. Stoma not differentiated.
- Pharynx muscular, cylindrical, with triradial cuticularized internal
lining of the lumen.
- Outlets of dorsal and two subventral pharyngeal glands at the same level
in the anterior pharynx.
- Cardia with triangular lumen.
- Mid gut polycyrous, with true internaI lumen.
- Rectum and anus generally present.
- Excretory system obscure; in genera Ananus and Australonema two parallel
canals possibly observed in pseudocoelom.
- Eight hypodermal chords; lateral chords wide, lobate, polycyrous; median
and submedian chords very thin.
- Female reproductive system amphidelphic with outstretched ovaries
producing numerous small eggs.
- No caudal glands.
- Juvenile stages are internal parasites of deep-sea invertebrates.
Reference:
Tchesunov. A. V. 1997. On the histological anatomy of Marimermis maritima
Rubzov & Platonova, 1974 (Nematoda: Dorylaimia
: Marimermithida), parasite of a sea
urchin. Fundamental and Applied Nematology 20:349-356.
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