Free-living marine nematodes of the family Sphaerolaimidae (Chromadoria, Monhysterida) from the mangroves of the Qeshm Island, Persian Gulf Author Tchesunov, Alexei V. Department of Invertebrate Zoology, Faculty of Biology, M. V. Lomonosov Moscow State University, 119991 Moscow, Russia. Author Eskandari, Ali 0000-0003-3902-7422 Department of Plant Protection, Faculty of Agriculture, University of ZanJan, 45371 - 38791, ZanJan, Iran. eskandari.a@znu.ac.ir Author Hosseinvand, Manouchehr 0000-0002-0472-1513 Department of Plant Protection, Faculty of Agriculture, University of ZanJan, 45371 - 38791, ZanJan, Iran. .houseinvand@gmail.com Author Hajializadeh, Parima 0000-0002-5997-7030 Department of Fisheries, Faculty of Marine Science and Technology, University of Hormozgan, Bandar Abbas, Iran. text Zootaxa 2024 2024-06-13 5468 3 523 540 http://dx.doi.org/10.11646/zootaxa.5468.3.6 journal article 298898 10.11646/zootaxa.5468.3.6 f5191cd6-725c-44d5-b66f-8676a68b155c 1175-5326 12189202 ECC85F24-D219-4664-899A-613FB64297DE Parasphaerolaimus Ditlevsen, 1918 Diagnosis. (after Lorenzen 1978 , 1981 , 1994 ; Coomans & Eyualem-Abebe 2006, Fonseca & Bezerra 2014 , Zograf et al . 2017 , Cavalcanti & Venekey 2017 , emended and amended) Sphaerolaimidae . Within cheilostoma, the longitudinally striated truncated conical compartment longer than the shagreen band. Narrow granular shagreen band often consisting of several (six) more or less well discernible elements; circular crest may be developed. Gymnostoma narrow. Stegostoma voluminous, conical, consisting of three large cuticular elements. Amphideal fovea at the level of gymnostoma or stegostoma. Type species: Parasphaerolaimus paradoxus Ditlevsen, 1918 . The genus currently includes 14valid species( NeMys 2023 ).Taxonomic reviews of the genus Parasphaerolaimus together with pictorial and dichotomic keys for species identification have been given recently by Zograf et al. (2017) and Cavalcanti & Venekey (2017) .