World Database of Nematodes

Linked to the Marine Biology Section, UGent

Key to the genera of the family Monhysteridae

Polytomous key to the genera of the family Monhysteridae based on the publication of Fonseca and Decramer (2008)
Key created by Katja Guilini

Please refer to this identification key as Fonseca G., Decraemer W. (2008) State of the art of the free-living marine Monhysteridae (Nematoda). Journal of the Marine Biological Association of the United Kingdom, 2008, 88(7), 1371–1390

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click to expand apex of lips Pictorial key
click to expand buccal cavity armature Pictorial key
click to expand buccal cavity shape Pictorial key
click to expand cheilostome weakly sclerotized and small Pictorial key
click to expand copulatory bursa Pictorial key
click to expand cristalloid bodies Pictorial key
click to expand gubernaculum slipper shaped Pictorial key
click to expand gubernaculum without apophyse Pictorial key
click to expand inner labial sensillae papilliform Pictorial key
click to expand ocelli Pictorial key
click to expand ovary reflexed Pictorial key
click to expand peri-oral plates Pictorial key
click to expand pharyngeal lumen sclerotized Pictorial key
click to expand pharynx with posterior bulbus Pictorial key
click to expand protrusion of the labial cuticle surrounding the inner labial sensilla Pictorial key
click to expand rectum well developed Pictorial key
click to expand small oral aperture, posterior buccal cavity part tube-like Pictorial key
click to expand somatic setae (length < 30% of the cbd) Pictorial key
click to expand spicules Pictorial key
click to expand spinneret shape Pictorial key
click to expand strong sexual dimorphism in shape of amphidial fovea and buccal cavity Pictorial key
click to expand tail shape Pictorial key
click to expand two lateral setae posterior to the amphidial fovea Pictorial key
click to expand vagina sclerotized Pictorial key
click to expand ventral gland opening at anterior neck region Pictorial key
click to expand ventral gland well developed Pictorial key
click to expand vulva close to the anus (V% = 75) Pictorial key
click to expand well developed postcloacal genital papillae Pictorial key
click to expand well developed second chamber of buccal cavity Pictorial key
click to expand well sclerotized cheilostome (except in Monhystrella), weakly or nonsclerotized second chamber Pictorial key
Remaining taxa:
Anguimonhystera Andrássy, 1981

Cryonema Tchesunov & Riemann, 1995

Diplolaimella Allgén, 1929

Diplolaimelloides Meyl, 1954

Eumonhystera Andrássy, 1981

Gammarinema Kinne & Gerlach, 1953

Geomonhystera Andrássy, 1981

Halomonhystera Andrássy, 2006

Hieminema Tchesunov & Portnova, 2005

Monhystera Bastian, 1865

Monhystrella Cobb, 1918

Odontobius Roussel del Vauzème, 1834

Sinanema Andrássy, 1960

Thalassomonhystera Jacobs, 1987


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