Sphaerolaimus Bastian, 1865

Zograf, Julia K., Pavlyuk, Olga N., Trebukhova, Yulia A. & Tu, Nguyen Dinh, 2020, Description of three new Sphaerolaimus species (Nematoda: Sphaerolaimidae) form the South China Sea, Zootaxa 4755 (3), pp. 491-514 : 492-494

Genus Sphaerolaimus Bastian, 1865

Diagnosis (emended from Schuurmans Stekhoven 1935, Tchesunov & Miljutin 2006): Sphaerolamidae. Cuticle finely striated or smooth under LM, lateral alae may be present. Anterior sensilla in two or three circles; inner labial sensilla usually papilliform; outer labial and cephalic setae setiform. Posterior to the cephalic setae, eight groups of subcephalic setae. Subcephalic setae absent in the first two juvenile stages while four to six are present in the third stage. Somatic setae usually present. Six movable lips. Amphids circular, in variable position in relation to the anterior end. Buccal cavity barrel–shaped; anterior portion with longitudinal ridges, posterior portion strongly sclerotized and surrounded by pharyngeal muscles. Pharynx cylindrical with cuticularized lumen. Two testes. Spicules mostly arcuate, moderately long, manubria are handle–shaped and apophyses short or absent. Tail mostly conical or conico–cylindrical with terminal setae.

Type species S. hirsutus Bastian, 1865

Other valid species

S. abeskunus Tchesunov, 1980

S. arcospiculum Allgén, 1959

S. balticus Schneider, 1906

= S. bretonicus Kreis, 1929

= S. ditlevseni Kreis, 1924

S. callisto sp. nov.

S. caspius Tchesunov, 1980

S. crenellatus Warwick, 1973

S. cuneatus Paramonov, 1929

S. ganymede sp. nov.

= S. maeoticus sensu Gerlach, 1957

= S. maeoticus sensu Timm, 1963

S. glaphyrus Vitiello, 1971 [“1970”]

S. gracilis de Man, 1876

= S. buetschlii Schulz, 1932

= S. demani Filipjev, 1922

= S. setosus Paramonov, 1927

S. haurakiensis Leduc & Zhao, 2017

S. io sp. nov.

= S. pacificus sensu Wieser, 1956

= S. pacificus sensu Timm, 1961

S. kleini Jensen, 1992

S. latilaimus Allgén, 1958

S. limosus Fadeeva, 1983

S. lutarius Gourbault & Boucher, 1981

S. macrocirculoides Wieser, 1954

S. macrocirculus Filipjev, 1918

S. maeoticus Filipjev, 1922

S. makrolasius Schultz, 1932

S. megamphis Wieser, 1956

S. micropapillatus Tchesunov & Miljutin, 2006

S. minutus Vitiello, 1971 [“1970”]

S. occidentalis Turpeenniemi, 1997

S. ostreae Filipjev, 1918

S. pacificus Allgén, 1947

S. papillatus Kreis, 1929

S. paragracilis Vitiello, 1971 [“1970”]

S. penicillus Gerlach, 1956a

S. peruanus Freudenhammer, 1975

S. profundus Vitiello, 1971 [“1970”]

S. rivalis Gagarin, 2014

S. uncinatus Freudenhammer, 1970

S. valentinae Tchesunov, 1987

Doubtful species

S. abyssorum Allgén, 1933

S. asetosus Allgén, 1952

S. brevicollis Ssaweljev, 1912

S. duplex Allgén, 1952

S. ferulaceus Gourbalt & Boucher, 1981

S. ibericus Freudenhammer, 1975

S. kornoensis Allgén, 1929

S. pacificus sensu Pastor de Ward, 1984

S. sabulosus Schultz, 1932

S. solivagus Galtsova, Platonova, Streltzova & Petukhov, 1980

S. tenius ( Kreis 1924) Schuurmans Stekhoven, 1935

= Cotholaimus tenius Kreis, 1924

Invalid species

S. anterides Inglis, 1961

= Paraspaherolaimus anterides ( Inglis, 1961) comb. nov.

S. campbelly Allgén, 1928

= Metasphaerolaimus campbelli (Allgén, 1928) Gourbault & Boucher, 1981

S. crassicauda Freudenhammer, 1975

= Metasphaerolaimus crassicauda ( Freudenhammer, 1975) Gourbault & Boucher, 1981

S. hadalis Freudenhammer, 1975

= Metaspherolaimus hadalis ( Freudenhammer, 1975) Gourbault & Boucher, 1981

S. horrendus Sergeeva, 1981

= Metasphaerolaimus horrendus (Serggeva, 1981) Jensen, 1992

S. lamasus Gerlach, 1956

= Subsphaerolaimus lamasus (Gerlach, 1956) Lorenzen, 1978

S. lodosus Gerlach, 1956

= Parasphaerolaimus lodosus (Gerlach, 1956) Zograf et al., 2017

S. paradoxus Ditlevsen, 1918

= Paraspaherolaimus paradoxus Ditlevsen, 1918

S. pentasetus Pastor de Ward, 1984

= Parasphaerolaimus pentasetus ( Pastor de Ward, 1984) Cavalcanti & Venekey, 2017

S. striatus Allgén, 1935

= Paraspaherolaimus striatus ( Allgén, 1935) Zograf et al., 2017