Axonolaimus de Man 1889

Genus Axonolaimus de Man, 1889 Diagnosis of genus Axonolaimus (modified from Leduc & Zhao 2023) Cuticle finely striated or smooth. Anterior end with four cephalic setae. Cervical setae present, posterior to the amphidial fovea. Amphidial fovea loop-shaped, longitudinally elongated or with rounded outline, at level of buccal cavity. Buccal cavity funnel-shaped, without odontia. Females with two opposed, outstretched ovaries. Males with one outstretched testis, sometimes two testes present. Spicules arcuated. Gubernaculum apophysis dorso-caudally oriented. Small tubular or pit-like precloacal supplements sometimes present. Males tail with subventral rows of setae. List of valid Axonolaimus species (Based on Liang et al. 2024) A. anellifer (Wieser, 1956) Lorenzen, 1994 Syn. Parachromagasteriella annelifera Wieser, 1956 Southemiella annelifera Wieser, 1956 A. antarcticus Cobb, 1930 A. arcuatus Schuurmans Stekhoven, 1950 A. caudostriatus Boucher, 1973 A. deconincki Vincx & Furstenberg, 1989 A. demani De Coninck & Schuurmans Stekhoven, 1933 A. dimorphous Liang, Guo & Wang, 2024 A. drachi Luc & De Coninck, 1959 A. filipjevi Timm, 1954 A. geminus Belogurov & Koroleva, 1975 A. glandifer Leduc & Zhao, 2023 A. helgolandicus Lorenzen, 1971 A. hexapilus Wieser & Hopper, 1967 A. interrogativus Wieser, 1959 A. mediterraneus Brunetti, 1941 A. odontophoroides Chitwood, 1936 A. orcombensis Warwick, 1970 A. orus Belogurov & Koroleva, 1975 A. paraponticus Hopper, 1963 A. paraspinosus Schuurmans Stekhoven & Adam, 1931 A. ponticus Filipjev, 1918 A. schuurmansstekhoveni Allgén, 1935 A. seticaudatus Platonova, 1971 A. setosus Filipjev, 1918 A. similis Schulz, 1932 A. spinosus (Bütschli, 1874) de Man, 1889 Syn. Anoplostoma spinosa Bütschli, 1874 Ascolaimus spinosus (Bütschli, 1874) Ditlevsen, 1919 A. steineri Timm, 1954 A. stomamilivus Crites, 1961 A. subsimilis Chitwood, 1936 A. tenuicaudatus Allgén, 1959 A. tenuis Schulz, 1932 A. tirrenicus Brunetti, 1941 A. typicus de Man, 1922 A. villosus Skwarra, 1922 A. rushanensis sp. nov. List of species inquirenda A. austrogeorgiae Allgén, 1959 A. diegoensis Allgén, 1947b A. filiformis de Man, 1889 A. leptosoma Allgén, 1951 A. limalis Ssaweljev, 1912 A. longisetosus Allgén, 1947a A. tenuicollis Allgén, 1947b A. versiliensis Brunetti, 1941