Axonolaimidae Filipjev, 1918

Shimada, Daisuke, Suzuki, Atsushi C., Tsujimoto, Megumu, Imura, Satoshi & Kakui, Keiichi, 2021, Two New Species of Free-living Marine Nematodes (Nematoda: Axonolaimidae and Tripyloididae) from the Coast of Antarctica, Species Diversity 26 (1), pp. 49-63 : 50-51

Schuurmans Stekhoven, 1933 Family Axonolaimidae Filipjev, 1918 Genus Odontophora Bütschli, 1874

Type species. Odontophora marina Bütschli, 1874

Diagnosis modified from Leduc and Zhao (2016). Cuticle smooth or striated; inner labial sensilla indistinct; six papilliform outer labial sensilla and four setiform cephalic sensilla in separate circles; buccal cavity funnel-shaped or conical with well-developed cuticular wall; six well-developed odontia present in cheilostoma; amphids loop-shaped with longitudinally elongate (inverted U-shaped) or circular (Oshaped) aperture; long subterminal setae on tail present or absent; spicules shorter than 2.0 cloacal body diameters; gubernacula usually with dorso-caudal apophysis, without anterior branch sometimes mistakenly called “telamon” (cf. Tchesunov 2014; Shimada et al. 2019); precloacal pore and supplements present or absent; male diorchic; female didelphic, ovaries outstretched.

Remarks. Leduc and Zhao (2016) listed 33 valid species and eight species inquirendae in Odontophora , providing a taxonomic key to all valid species. We add four valid species: O. sinapophysis Pinto and Neres, 2020 , which was described after the work by Leduc and Zhao (2016); O. hawksbiensis Turpeenniemi, Nasira, and Maqbool, 2001 , and O. serrata Hourston and Warwick, 2010 , which were overlooked by Leduc and Zhao (2016); and O. polaris ( Cobb, 1914) , which De Coninck and Schuurmans Stekhoven (1933) regarded as a species inquirenda. Leduc and Zhao (2016) followed De Coninck and Schuurmans Stekhoven (1933), probably because of the incomplete original description by Cobb (1914) based only on an immature specimen, although Cobb (1930) and Timm (1978b) later provided descriptions of both sexes. In addition, we consider O. longicaudata Schuurmans Stekhoven and De Coninck, 1933 to be a species inquirenda, because this species was established based only on a juvenile. Thus, the genus Odontophora now contains the following 36 valid species ( Cobb 1914; Turpeenniemi et al. 2001; Hourston and Warwick 2010; Leduc and Zhao 2016; Pinto and Neres 2020).

O. angustilaima ( Filipjev, 1918) Allgén, 1929 = Conolaimus angustilaimus Filipjev, 1918 non O. angustilaimus sensu Schuurmans Stekhoven (1950)

O. armata ( Ditlevsen, 1918) Allgén, 1929 = Trigonolaimus armatus Ditlevsen, 1918 = Conolaimus armatus ( Ditlevsen, 1918) Allgén, 1930 = Trigonolaimus intermedius Allgén, 1929 = Conolaimus intermedius ( Allgén, 1929) Allgén, 1934 = O. intermedius ( Allgén, 1929) Allgén, 1930 = Trigonolaimus minor Ditlevsen, 1918 = O. minor ( Allgén, 1929) Allgén, 1930 non O. armata sensu De Coninck and Schuurmans Stekhoven (1933) non O. armata sensu Schuurmans Stekhoven (1935) (in part)

O. articulata Keppner, 1988

O. atrox Leduc and Zhao, 2016

O. bermudensis Jensen and Gerlach, 1976

O. brevispicula Keppner, 1988

O. carrolli Keppner, 1988

O. deconincki Galtsova, 1976 = O. armata sensu De Coninck and Schuurmans Stekhoven (1933) = O. armata sensu Schuurmans Stekhoven (1935) (in part)

O. exharena Warwick and Platt, 1973

O. falcifera Ott, 1972

O. fatisca Vitiello, 1971

O. furcata Wieser, 1956

O. hawksbiensis Turpeenniemi, Nasira, and Maqbool,

2001

O. lituifera Wieser, 1959

O. longisetosa ( Allgén, 1928) Allgén, 1929 = Conolaimus longisetosus Allgén, 1928 non Conolaimus longisetosus sensu Schuurmans Stekhoven (1931)

O. mercurialis Wieser, 1959

O. mucronata Wieser, 1959

O. octoseta Boucher and Helléouët, 1977

O. ornata Lorenzen, 1971

O. paravilloti Blome, 1982

O. peritricha Wieser, 1956

O. phalarata Lorenzen, 1971

O. polaris ( Cobb, 1914) De Coninck and Schuurmans

Stekhoven, 1933 = Axonolaimus polaris Cobb, 1914

O. polynesiae Boucher, 1973

O. rectangula Lorenzen, 1971

O. regalia Nichols and Musselman, 1979

O. serrata Hourston and Warwick, 2010

O. setosa ( Allgén, 1929) Allgén, 1929 = Trigonolaimus setosus Allgén, 1929 = Conolaimus setosus ( Allgén, 1929) Allgén, 1930 = Axonolaimus elegans Schulz, 1932

= Conolaimus longisetosus sensu Schuurmans Stekhoven (1931)

O. setosoides Timm, 1952

O. sinapophysis Pinto and Neres, 2020

O. spiculodentata Pastor de Ward, 1984

O. tenuicaudata Allgén, 1935

O. urothrix Gerlach, 1957

O. variabilis Wieser and Hopper, 1967

O. villoti Luc and De Coninck, 1959

O. wieseri Luc and De Coninck, 1959

species inquirendae

O. angustilaimoides Chitwood, 1951

O. axonolaimoides Timm, 1952

O. insulana Belogurov, 1978

O. longicaudata Schuurmans Stekhoven and De Coninck,

1933

O. marina Bütschli, 1874

= Conolaimus marinus ( Bütschli, 1874) Allgén, 1930

O. parangustilaima Wieser, 1956

= O. angustilaimus sensu Schuurmans Stekhoven (1950)

O. parasetosa ( Allgén, 1929) Allgén, 1929 = Trigonolaimus parasetosus Allgén, 1929 = Conolaimus parasetosus ( Allgén, 1929) Allgén, 1930 O. paratenuicaudata Allgén, 1942