Revised 03/03/22
Paramicrolaimidae Lorenzen, 1981
(transfer to a new order, Microlaimida, proposed per Leduc et al., 2017)
A relatively rare family of free-living marine nematodes.
Cuticle does not have punctations.
Buccal cavity with unusual morphology: a transverse stoma opening formed by the fusion of the two ventrosublateral lip lobes and enlarged dorsal lip lobe, resulting in partial dorsoventral symmetr.
A medium to large dorsal tooth set within, and surrounded by, the esophageal wall, does not project completely into the esophageal umen , and is always associated with a conspicuous gland.
Inhabitants of marine sediments, usually coastal, but individuals rhave been reported from the continental slope of New Zealand in the southwest Pacific Ocean.at depths of 374-1513 meters.
Phylogenetic analyses suggest a close relationship between the Paramicrolaimidae and the family Selachinematidae Cobb, 1915
Based on unique morphological and molecular, Leduc et al (2017) proposed a new order, Microlaimida, to accommodate Pthe Paramicrolaimidae.
Ref: Leduc et al (2017).
References
Leduc, D., Verdon, V., Zhao, Z.Q. 2017. Phylogenetic position of the Paramicrolaimidae, description of a new Paramicrolaimus species and erection of a new order to accommodate the Microlaimoidea (Nematoda: Chromadorea). Zoological Journal of the Linnean Society, 20, 1–18.
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