title: Revision of the genusParasphaerolaimus(Nematoda: Sphaerolaimidae) with description of new species.
abstract: The family Sphaerolaimidae Filipjev, 1918 includes nematodes that are characterized by the finely striated cuticle, round amphids, broad buccal cavity with longitudinal ribs, and single anterior ovary in females. Parasphaerolaimus species from this family are found in intertidal and subtidal sediments and have also been reported from mangroves and estuaries. Parasphaerolaimus pilosus sp. n. is characterized by the moderately plump body, presence of lateral alae, long cervical setae, small amphids in males, and relatively short spicules. As a result of a comprehensive evaluation of species descriptions, eight species in the genus Parasphaerolaimus are recognized valid, and an identification key to species level is provided.
authors.affiliation: A.V. Zhirmunsky Institute of Marine Biology, National Scientific Center of Marine Biology, Far Eastern Branch, Russian Academy of Sciences, ul. Paltchevskogo 17, Vladivostok, 690041, Russia Far Eastern Federal University, ul. Sukhanova 8, Vladivostok, 690050, Russia.. user@example.com.
authors.forename: Julia K
authors.initials: JK
authors.lastname: Zograf
authors.forename: Olga N
authors.initials: ON
authors.lastname: Pavlyuk
authors.forename: Yulia A
authors.initials: YA
authors.lastname: Trebukhova
authors.forename: Nguyen Dinh
authors.initials: ND
authors.lastname: Tu
mesh_terms: D017157:Adenophorea; D000818:Animals; D005260:Female; D008297:Male; D009348:Nematoda
keywords: Nematoda, free-living nematodes, key to species, taxonomy, SEM, Vietnam