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World Database of Nematodes Linked to the Marine Biology Section, UGent
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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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| Characteristics
buccal cavity shape subdivided (pharyngostom) in two parts non-divided, V-shaped apex of lips partially fused (three lips) not fused fused spicules arcuate and robust long none of the above tail shape long and filiform with swollen tip conoid none of the above spinneret shape with a hyaline plug-like structure long pharyngeal lumen sclerotized present absent well developed postcloacal genital papillae present absent protrusion of the labial cuticle surrounding the inner labial sensilla present absent well sclerotized cheilostome (except in Monhystrella), weakly or nonsclerotized second chamber present absent vagina sclerotized present absent copulatory bursa present absent ocelli present absent ventral gland well developed present absent small oral aperture, posterior buccal cavity part tube-like present absent pharynx with posterior bulbus present absent ovary reflexed present absent vulva close to the anus (V% = 75) present absent somatic setae (length < 30% of the cbd) present absent rectum well developed present absent ventral gland opening at anterior neck region present absent inner labial sensillae papilliform present absent peri-oral plates present absent cristalloid bodies present absent cheilostome weakly sclerotized and small present absent strong sexual dimorphism in shape of amphidial fovea and buccal cavity present absent two lateral setae posterior to the amphidial fovea present absent buccal cavity armature 18 - with three teeth 37 - denticulate 16 - with small denticle at base of buccal cavity well developed second chamber of buccal cavity present absent gubernaculum without apophyse present absent gubernaculum slipper shaped present absent | 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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