[ page update: 2021-VIII-24 ; 2022-IV-06; IX-12; 2023: III-11; VI-09; X-23; mjw]
oaxacana, Diplotrema Fragoso et Rojas, 2019; Zootaxa 4688(4): 485; Holotype: IEOL 3103;
Paratypes: IEOL 3102, 3262, 4846; ZooBank. ^
obiensis, Parapolytoreutus Segun, 1980; J. Nat. Hist. 14(2): 273; BMNH 1977:22:1–2, NHMI.
[N.O.S.P., p. 25]
obliquae, Perionychella Jamieson, 1974; Bull. Brit. Mus. Nat. Hist. (Zool.) 26(4): 250; TMHA 310,
BMNH 1972:8:31, AMSS 5202. [N.O., p. 146]
obliquus, Heterodrilus Erséus, 1997; Proc. 7th Intl. Mar. Biol. Wksp., p. 404; WAMP [as WAM] 103-96,
NHRS [as SMNH] Type Coll. 4832.
oblongata, Dero R. Grimm, 1985; Mitt. Hamb. Zool. Mus. Inst. 82: 105; AMSA, ZMUH. [N.O.S.S., p. 22]
obscura, Perichaeta Spencer, 1893; Diporochaeta; Proc. Roy. Soc. Vict. 5: 3; NMVA 195, 1447.
[N.O., p. 146]
obscura, Perichaeta Goto et Hatai, 1898; Amynthas, Pheretima; Annat. Zool. Japan. 2: 70;
non Spencer, 1893. [N.O., p. 146]
obscurus, Microchaetus Plisko, 1998; Kazimierzus; Ann. Natal Mus. 39: 275; NMSA Olig.02595, Olig.02654.
obscuricola, Eophila Černosvitov, 1936; Arch. Zool. Exp. Gen. 78: 5; MNHN. [N.O., p. 146]
obscuritopora, Pheretima Y. Chen, 1930; Amynthas; Sci. Rept. Nat. Cent. Univ. Nanking 1: 28.
[N.O., p. 146]
obscurus, Megascolides Spencer, 1892; Notoscolex; Proc. Roy. Soc. Vict. 4: 148; typus amissus.
[N.O., p. 146]
obscurus, Mesenchytraeus Eisen, 1905; Harriman Alaska Exped. 12: 32; UWMS. [N.O., p. 146]
obscurus, Phallodrilus Cook, 1969; Biol. Bull. 136(1): 17; USNM 38255-6. [N.O., p. 146]
obsoletus, Amynthas Qiu et Sun, 2013; J. Nat. Hist. 47(17-18): 1144; Shanghai Natural [sic?] National
Museum C-HN026-01A, C-HN026-01B [additional information (i.e., correct name, location,
curator contact) needed for the museum in which types have been deposited]
obtusa, Dero Udekem, 1855; Bull. Acad. Belg. 22(2): 549. [N.O., p. 146]
obtusa, Dero Perrier, 1872; Arch. Zool. Exp. Gén. 1: 65; non Udek., 1855. [N.O., p. 146]
obtusa, Diporochaeta Lee, 1952; Trans. Roy. Soc. N.Z. 80: 41; SBNZ. [N.O., p. 146]
obtusa, Fridericia Friend, 1912; Rept. Notts. Nat. Soc. 60: 61; nom. nud. [N.O., p. 146]
obtusa, Opsonias Gervais, 1838; Nais; Bull. Acad. Belg. 5: 17; MNHN. [N.O., p. 146]
obtusa, Pheretima Ohfuchi, 1937; Amynthas; Res. Bull. Saito Ho-on Kai Mus. 12: 62. [N.O., p. 146]
obtusirostris, Euaxes Menge, 1845; Rhynchelmis; Arch. Naturg. 11: 31. [N.O., p. 146]
obtusus, Acanthodrilus Perrier, 1872; Notiodrilus; N. Arch. Mus. Paris 8:87; MNHN 572. [N.O., p. 146]
obtusus, Mexidrilus Erséus, 1992; Zool. Scripta 21(1): 26; USNM 143586-8. [N.O.S.T., p. 18]
obuduensis, Polytoreutus Owa, 1995; J. Afr. Zool. 109(3): 206; MNHI.
ocarina, Grania Rota, Erséus et H-Z. Wang, 2003; Mar. Flora Fauna Dampier, p. 502; WAMP V4351, V4352,
NHRS 5868, MCZR 0128.
occidentalis, Acanthodrilus Beddard, 1895; Notiodrilus; Proc. Zool. Soc. Lond., 1895, p. 214; ZMUH 4134,
4136, USNM 21024. [N.O., p. 146]
occidentalis, Allolobophora Michaelsen, 1922; Helodrilus, Eophila; Scherotheca; Capita Zool. 1(3): 12;
RNHL 1673. [N.O., p. 146]
occidentalis, Heterodrilus Erséus, 1981; Zool. Scripta 10(2): 121; USNM 60606-10. [N.O.S.S., p. 22]
occidentalis, Ocnerodrilus Eisen, 1878; N. Acta Soc. Upsal. (3), 10(4): 10; BMNH 1904:10:5:231-6,
(MNHU 2363 – typus amissus). [N.O., p. 146]
occidentalis, Prosellodrilus Qiu et Bouché, 1998; Doc. Pédozool. Intégrol. 4(5): 45; OECO 117/2481/2185.
occidentalis ss. Allolobophora icterica Graff, 1957; Agron. Lusit. 19(4): 300; MZUO, MBLP. [N.O., p. 146]
occidualis, Microchaetus Plisko, 1998; Kazimierzus; Ann. Natal Mus. 39: 277; NMSA Olig.02608,
Olig.02607, Olig.02609, Olig.02656.
occiduus, Microchaetus Plisko, 1998; Kazimierzus; Ann. Natal Mus. 39: 279; NMSA Olig.02653, Olig.02581,
Olig.02584, Olig.02589, Olig.02594.
occitanica, Scherotheca (Opothedrilus) Szederjesi, Pavlíček et Csuzdi, 2021; Acta Zool. Bulg. 73(1): 17;
Holotype: HNHM/17650; paratypes: HNHM/9774, HNHM/12548, HNHM/12549, HNHM/12557,
HNHM/17638, HNHM/17644, HNHM/17647.^
occulta, Grania De Witt et Erséus, 2010; J. Zool. Syst. Evol. Res. 48(4): 287; NHRS [as SMNH] TYPE-7844;
COI barcode sequence, GenBank acc. no. GU473645; ITS sequence, GenBank acc. no. GU473705.
occulta ss. Allolobophora longa Cognetti, 1904; Helodrilus; Boll. Mus. Torino 19(466): 2. [N.O., p. 146]
occulatus, Helodrilus Hoffmeister, 1845; Eophila; Regenwürmer, p. 39; ZMUH 150. [N.O., p. 146]
oceanicus, Ainudrilus Finogenova, 1982; Zool. Zh. 61(8): 1255; ZIAS 45672-4. [N.O.S.S., p. 22]
ocellatus, Amyntas Michaelsen, 1899; Pheretima; Mitt. Mus. Hamb. 16: 89; typus amissus. [N.O., p. 146]
ochotensis, Lumbricillus Shurova, 1979; Enchytraeids Far-East Seas, p. 77; IMBV 16019. [N.O.S.S., p. 22]
ochracea, Archienchytraeus Eisen, 1878; Enchytraeus; Öfv. Akad. Förh. 35(3): 71. [N.O., p. 146]
ochridana ss. Dendrobaena veneta Šapkarev, 1977; Ann. Fac. Biol. Univ. Skopje 30: 36; typus in
auctoris collectione. [N.O.S.P., p. 25]; Ann. Fac. Biol. Univ. Skopje 30: 36; lapsus calami pro: 29: 36
[N.O.S.T., p. 26]
ochridana f. Eiseniella tetraedra var. lacustris Černosvitov, 1931; Zool. Anz. 95: 97; NMPC III-I-23.
[N.O., p. 146]
ochridana f. Lamprodrilus pygmaeus Hrabě, 1931; Zool. Jb. Syst. 61: 45; HOCB 1593-8-H-I. [N.O., p. 146]
ochridana var. Eiseniella tetraedra Černosvitov, 1931; Zool. Anz. 95: 97; NMPC III-I-24. [N.O., p. 146]
ochridanus, Ilyodrilus Hrabě, 1931; Euilyodrilus, Potamothrix; Zoo1. Jb. Syst. 61: 24; HOCB 1593-2-E-IV.
[N.O., p. 146]
ochridanus, Psammoryctes Hrabě, 1931; Tubifex; Zool. Jb. Syst. 61: 16; typus amissus. [N.O., p. 146]
ochridensis, Criodrilus Georgěvitch, 1950; Bull. Acad. Serb. Sci. Cl. Sci., Math. Nat. 1(1): 75. [N.O., p. 146]
ochroceus, Archienchytraeus Eisen, 1878; Öfv. Akad. Förh. 35(3): 71; NHRS III. [N.O., p. 146]
oconeensis, Fridericia Welch, 1914; Bull. Ill. St. Lab. Nat. Hist. 10: 159; USNM 25506, 26320, 30852.
[N.O., pp. 146-147]
octaedrum, Enterion Savigny, 1826; Lumbricus, Helodrilus, Allolobophora, Dendrobaena; Mém. Acad. Sci.
Inst. Fr. 5: 183; MNHN. [N.O., p. 147]
octocordatus, Eodrilus Pickford, 1937; Monogr. Acantho., p. 143; BMNH 1938:7:1:433–42. [N.O., p. 147];
typus quoque locatus in MNHU 10791. [N.O.S.T., p. 26]
octocordatus ss. Parachilota algoensis Pickford, 1937; Monogr. Acantho., p. 399; BMNH 1938:7:1:1715–7.
[N.O., p. 147]
octocystis, Anteus Michaelsen, 1900; Thamnodrilus, Rhinodrilus; Arch. Naturg. 66(1): 265; typus amissus.
[N.O., p. 147]; typus locatus in WUMW 505 (syntypus – siccum specimen). [N.O.S.S., p. 30]
octonephra, Benhamia Rosa, 1895; Dichogaster; Boll. Mus. Torino 10(204): 2; ZMUH 4501. [N.O., p. 147]
octonephra f. Dichogaster bolaui Rosa, 1895; cf. Benhamia octonephra Rosa, 1895. [N.O., p. 147]
octopapillatus, Amynthas Qiu et Sun, 2009; Rev. Suisse Zool. 116(2): 293; Holotype: MNS C-HN002A;
paratypes: MNS C-HN002B, MHNG INVE62882. ^
octotheca, Kanchuria Julka, 1988; Res. Bull. (Sci.) Panjab Univ. 39(1-2): 88; ZSIC An 2197–8, ZSIS An 769.
[N.O.S.T., p. 18]
octothecatus, Gemascolex Jamieson, 1974; Proc. Roy. Soc. S. Aust. 98(2): 14; AMSS, BMNH, SAMA,
BGMJ. [N.O., p. 147]
octothecatus, Vesiculodrilus Blakemore, 2000; Tasmanian Earthworms, p. 153; QVMA 14: 3299.
oculata, Diporochaeta Jamieson, 1976; Zool. Verh. Leiden, No. 149, p. 42; QMBA 8365-9, RNHL 15253-4,
BGMJ. [N.O.S.P., p. 25]
oculata, Pheretima Y. Chen, 1938; Amynthas; Cont. Biol. Lab. Sci. Soc. China (Zool.) 12: 398. [N.O., p. 147]
oculatus, Helodrilus Hoffmeister, 1845; cf. H. occulatus Hoffmeister, 1845. [N.O., p. 147]
odaesanensis, Amynthas Y. Hong et James, 2001; Rev. Suisse Zool. 108(1): 86; KIBIO – holotypus
et 3 paratypi designati sed innumerati.
oeconomicus, Vesiculodrilus Blakemore, 2000; Tasmanian Earthworms, p. 155; QVMA 14: 0740, 3069-73.
oeriginosa, Perichaeta Beddard, 1891; Proc. Phys. Soc. Edinb. 10: 278; lapsus pro: P. aeruginosa
Kinberg,1867. [N.O., p. 147]
oerleyi, Allolobophora Horst, 1887; Notes Leyden Mus. 9: 294; RNHL 1723. [N.O., p. 147]
oesophagus, Octodrilus Mršić, 1991; Monogr. Earthworms Balkans II, p. 388; typus in auctoris
collectione 2099. [N.O.S.T., p. 18]
officeri, Cryptodrilus Spencer, 1895; Trinephrus; Proc. Roy. Soc. Vict. 7: 44; NMVA 80. [N.O., p. 147]
ofunatoensis, Drawida Ohfuchi, 1938; Saito Ho-on Kai Mus. Res. Bull. 15: 33–52 [actual paper not yet
seen to verify pagination of description]; typus amissus (vide Blakemore et al. 2014: J. Species Res.
3: 127–166); syntypes (NSMT-AN 534) rediscovered; vide Yamane and Nakano 2020:
Edaphologia 108: 30 [on line release pending for early 2022].^
ogloblini, Mesenchytraeus Černosvitov, 1928; Zool. Jb. Syst. 55: 18; BMNH 1949:3:1:396-420. [N.O., p. 147]
ogumai, Hraběa Yamaguchi, 1936; J. Fac.-Sci. Hokkaido Univ. (Ser. VI) 5: 89. [N.O., p. 147]
ohausi, Aptodrilus Michaelsen, 1917; Zool. Jb. Syst. 41: 163; ZMUH 6963. [N.O., p. 147]
ohausi, Fimoscolex Michaelsen, 1900; Zool. Anz. 23: 55; typus amissus. [N.O., p. 147]
ohausi, Thamnodrilus Michaelsen, 1917; Zool. Jb. Syst. 41: 126; ZMUH 6980. [N.O., p. 147]
ohtakai, Enchytraeus Torii, 2023; Zootaxa 5254(2): 250; Holotype: NSMT-An-1881;
paratypes: NSMT-An-1882, 1884, 1885, 1886, 1883, 1887, 1888, 1889, 1890.^
oiepe, Guaranidrilus Righi, 1974; Pap. Avul. Zool. 28(7): 127; DZSP 269. [N.O., p. 147]
oinakensis, Pheretima Cognetti, 1914; Metapheretima; Zool. Jb. Syst. 37: 355; RNHL 1838. [N.O., p. 147]
okaensis, Potamothrix Lastoćkin, 1927; Rab. Nauchno-prornýsl. Eksped. Izveh. Reki Obi. 5: 39.
[N.O., p. 147]
okamikae, Rhyacodrilus Giani et P. Rodriquez, 1988; Stygologia 4(2): 125; typus in auctoris collectione.
[N.O.S.T., p. 18]
olchonensis, Rhynchelmis Bürow et Koshow, 1932; Pseudorhynchelmis; Arb. Ost. Sibir. Staatsuniv.
Mosc. 1: 82. [N.O., p. 147]; [see Martin et Kaygorodova, 2008 – Zootaxa 1938: 23-39]
olearia, Dero Friend, 1912; J. Linn. Soc. Lond. 32: 101; typus amissus. [N.O., p. 147]
olearius, Limnodriloides Erséus et Milligan, 1989; Proc. Biol. Soc. Wash. 102(4): 887; USNM 119904–5.
[N.O.S.T., p. 18]
olgae, Lumbriculus Sokolskaya, 1976; Byull. Mosk. Obshch. Isp. Prir. Otd. Biol. 81(3): 48; ZMUM 1045.
[N.O.S.P., p. 25]
olidus, Lumbricus Hoffmeister, 1842; Verm. Lumbric., p. 25; typus amissus. [N.O., p. 147]
oligoseta, Timmodrilus Dózsa-Farkas, 1997; Opusc. Zool. Budapest 29-30: 50; typus in auctoris
collectione [TIUB], T.1.
oligosetosa, Enchytronia Sesma et Dózsa-Farkas, 1993; Acta Zool. Hung. 39(1-2): 250; CSIC RK2-1,
RK2-2, RK2-6, TIUB P.25.1.
oligosetosa, Fridericia Nusbaum, 1895; Biol. Zbl. 15: 27. [N.O., p. 147]; typus amissus; nom. dub., see
Schmelz (2003): Abh. Naturwiss. Vereins Hamburg (Neue Folge) 38: 378-379.
oligosetosa, Marionina Kossmagk-Stephan, 1983; Mikro. Meers. 0(89): 17; ZMUH OL.13268–9.
[N.O.S.S., p. 22]
oligosetosa var. Lamprodrilus pygmaeus Issosimoff, 1965; Trudy Limnol. Inst. Lac Baikal (1), 21(1): 27.
[N.O., p. 147]
oligosetosus, Mesenchytraeus Friend, 1913; Zoologist (4), 17: 462; typus amissus. [N.O., p. 147]
oligosetosus, Tubifex Hrabě, 1931; Psammoryctes; Zool. Jb. Syst. 61: 21; HOCB 1593 -20-Ch-I.
[N.O., p. 147]
oligotheca var. Scherotheca savignyi Bouché, 1972; Inst. Nat. Rech. Agron., p. 302; OECO 54-543-0661.
[N.O., p. 147]
olivaceous, Martiodrilus James, 1990; Zool. Scripta 19(3): 305; USNM 086177,129434. [N.O.S.T., p. 18]
olivaceum, Aeolosoma Bunke, 1967; Zool. Jb. Syst. 94: 236. [N.O., p. 147]
olivaceus ss. Lumbricus communis Eisen, 1871; Öfv.. Akad. Förh. 27: 964. [N.O., p. 147]
oliveirae, Allolobophora Rosa, 1894; Helodrilus, Dendrobaena; Boll. Mus. Torino 9: 2. [N.O., p. 147]
oliveirae, Glossodrilus Righi, 1982; Rev. Brasil. Zool. 1(1): 59; DZSP ZU-694A, ZU-694B. [N.O.S.S., p. 22] ^
oliveria var. Fridericia bollonsi Benham, 1914; Trans. N.Z. lnst. 47: 176. [N.O., p. 147]
oltenica, Eiseniella Pop, 1938; Bull. Soc. Sti. Cluj 9: 135; MZCR, BMNH 1949:3:1:634–8. [N.O., p. 147]
oltenicus, Bimastus Pop, 1938; Bull. Soc. Sti. Cluj 9: 146; typus amissus. [N.O., p. 147]
olympica, Eisenia Černosvitov, 1938; Dendrobaena; Zool. Anz. 123; 193; NMPC III-I-II-2. [N.O., p. 147]
olympus, Aporodrilus Blakemore, 2000; Tasmanian Earthworms, p. 412; QVMA 14: 3304, 3306,
ANIC.RB.00.1.13
ombrophilus, Prosellodrilus Qiu et Bouché, 1998; Doc. Pédozool. Intégrol. 4(5): 46; OECO 118/2703/2186.
omeiana, Drawida Y. Chen, 1946; J. W. China Border Res. Soc. 16: 84. [N.O., p. 147]
omeimontia var. Pheretima paraglandularis Y. Chen, 1931; Amynthas; Cont. Biol. Lab. Sci. Soc.
China (Zool.) 7: 155. [N.O., p. 147]; omeimontia var. Pheretima paraglandularis Y. Chen, 1931;
lapsus calami pro: omeimontis var. Pheretima paraglandularis Y. Chen, 1931. [N.O.S.P., p. 33]
omeri, Fridericia Stephenson, 1932; Proc. Zool. Soc. Lond., 1932, p. 227; typus amissus. [N.O., p. 147]
omilurus, Lumbricus Templeton, 1836; Mag. Nat. Hist. 9: 235; typus amissus. [N.O., p. 147]
omodeoi, Allolobophora Zajonc, 1965; Biol. Brat. 18: 521; KHZN. [N.O., p. 147]
omodeoi, Amynthas Zhao et Qiu, 2009; J. Nat. Hist. 43(17-18): 1031; SNHM C-HN006 {referenced
as the ‘Shanghai Museum of National History’ in this paper} {holotype and paratype have same
accession number} ^
omodeoi, Cernosvitoviella Rota, 1995; Boll. Zool. 62(2): 194; MCZR 0020.
omodeoi, Dendrobaena Csuzdi, Pavlíček et Misirlioğlu, 2007; Acta Zool. Hung. 53(4): 352;
HNHM Z/15240, Z/15095.
omodeoi, Diporodrilus Bouché, 1970; Pedobiologia 10: 252; OECO 16-422-6711. [N.O., p. 147]
omodeoi, Octodrilus Zicsi, 1981; Opusc. Zool. Budapest 17-18: 164; MSNV 271, 316, 331, TIUB Z/8662.
[N.O.S.S., p. 22]
omodeoi, Rhyacodrilus Martínez-Ansemil, Samburgar et Giani, 1997; Annls. Limnol. 33(1): 34;
MTSN OLI 1, OLI 2.
omodeoi, Scherotheca (Corsicadrilus) Qiu et Bouché, 1998; Doc. Pédozool. Intégrol. 4(12): 129;
OECO 163/2898/0638.
omodeoi, Xana Cosín, Briones et Trigo, 1989; Rev. Écol. Biol. Sol 26(2): 225; ZDUS XOm 001.
[N.O.S.T., p. 18]
omranii, Eisenia Latif, Malek & Csuzdi, 2017; N.-W. J. Zool. 13 (2): 330; ZUTC 5876, 5877. ^
omtrekensis, Pheretima Cognetti 1911; Amynthas; Boll. Mus. Torino 26(641): 3; vide Amynthas
homoeotrochus Cognetti 1912. [N.O., p. 147]
onegensis, Alexandrovia Hrabě, 1962; Telmatodrilus; Publ. Fak. Sci. Univ. Brno. no. 435, p. 291;
HOCB 845-56-II. [N.O., p. 147]
onegensis f. Rhynchelmis granueusis Hrabě, 1962; Publ. Fak. Sci. Univ. Brno, no. 435, p. 321;
HOCB 845-21-I. [N.O., p. 147]; lapsus calami pro: R. granuensis f. onegensis Hrabě, 1962.
[N.O.S.S., p. 30]
oneilli, Megascolex Stephenson, 1914; Tonoscolex; Rec. Ind. Mus. 8: 377; ZSlC 5159. [N.O., p. 147]
onon ss. Eisenia nordenskioldi Blakemore, 2013; Zookeys 285: 7; NIBR IV0000261277, IV000061278.
onorei, Martiodrilus Zicsi, 1988; Acta Zool. Hung. 34(4): 438; TIUB AF/568–70, 287. [N.O.S.T., p. 18]
opacus, Pachydrilus Czerniavsky, 1880; Bull. Soc. Mosc. 55(4): 320. [N.O., p. 147]
operculata, Perichaeta Rosa, 1891; Amyntas, Pheretima, Metaphire; Ann. Mus. Wien 6: 398. [N.O., p. 148]
ophidioides, Moniligaster Bourne, 1891; Drawida; Quart. J. Micros. Sci. (n.s.) 36: 365; UMOU 1521,
BMNH 1895:9:3:6. [N.O., p. 148]
ophiodes, Pheretima Michaelsen, 1930; Archipheretima; Philipp. J. Sci. (D), 41: 273; ZMUH 10418.
[N.O., p. 148]
ophioides, Thamnodrilus Cognetti, 1904; Rhinodrilus; Boll. Mus. Torino 19(474): 6; MZUT 439. [N.O., p. 148]
ophiomorpha, Allolobophora Perel, 1977; Zool. Zh. 56(4): 499; ZMUM. [N.O.S.P., p. 25]
ophthalmopapillata, Pheretima Thai, 1982; Zool. Zh. 61(6): 823; ZMUM. [N.O.S.S., p. 22]
opisthoporus, Zophoscolex Qiu et Bouché, 1998; Doc. Pédozool. Intégrol. 4(4): 32; OECO 142/2752/2278.
opistocystoides, Aulophorus Nesemann, Shah et Tachamo, 2007; Aquatic Invert. Ganga River
System 1: 116; WNHM [as NHMW-EV] holotypus sed innumeratus, non paratypi.
opium, Enterion Savigny, 1826; Lumbricus; Mém, Acad. Sci. Inst. Fr. 5: 183. [N.O., p. 148]
opisthoannulatus, Bythonomus Isossimoff, 1962; Stylodrilus; Trudy Limnol. Inst. Lac Baikal (1), 21(1): 48.
[N.O., p. 148]
opisthocystis, Allolobophora Rosa, 1895; Eophila, Helodrilus; Boll. Mus. Torino 10: 4. [N.O., p. 148]
opisthoductus, Proctodrilus Zicsi, 1985; Acta Zool. Hung. 31(1-3): 285; TIUB Z/5569. [N.O.S.S., p. 22]
opisthogaster, Hickmaniella Jamieson, 1974; Bull. Brit. Mus. Nat. Hist. (Zool.) 26(4): 301; TMHA 360–1,
BMNH 1973:2:34, AMSS 5322–3, BGMJ T64. [N.O., p. 148]
opisthogynus, Agastrodrilus Omodeo et Vaillaud, 1967; Bull. Inst. Franç. Afr. N. 29(A): 926. [N.O., p. 148]
opisthosellata, Allolobophora Graff, 1961; Agron. Lusit. 23(2): 81; MZUO. [N.O., p. 148]
opisthothecus, Styloscolex Sokolskaya, 1969; Zool. Zh. 48: 342; ZMUM 991, 1015. [N.O., p. 148]
oppidanus, Megascolides Blakemore, 2000; Tasmanian Earthworms, p. 252; QVMA 14: 1403.
opulentus, Abyssidrilus Erséus, 1992; Zool. Scripta 21(1): 19; USNM 143578–80. [N.O.S.T., p. 18] ^
oraedivitis, Eutrigaster Cognetti, 1904; Boll. Mus. Torino 19(478): 2; MZUT 100. [N.O., p. 148]
orahovacensis, Allolobophora Reynolds et Cook, 1976; nom. nov. pro: A. zicsi Šapkarev, 1975,
non Bouché, 1972. [N.O., p. 148]
orbicularis, Amynthas Sun et JbJiang, 2016; J. Nat. Hist. 50(39-40): 2509; SNHM C-SC201102-19A,
C-SC201102-19B, C-SC201102-21. ^
orbiculatus, Larsonidrilus James, 1993; Acta Zool. Mex. (n.s.) 60: 13; USNM 169142.
orbiensis ss. Scherotheca gigas Bouché, 1972; Inst. Nat. Rech. Agron., p. 287; OECO 44-1187-0571.
[N.O., p. 148]
orcae, Mesenchytraeus Eisen, 1905; Harriman Alaska Exped. 12: 39; USNM 32919. [N.O., p. 148]
orcrista, Metapheretima Easton, 1979; Bull. Brit. Mus. Nat. Hist. (Zool.) 35(1): 112; BMNH 1976:17–21.
[N.O.S.P., p. 25]
orcus, Deinodrilus Blakemore, 2013; J. Species Res. 1(2): 118; AMNZ (H) AMNZ86029;
TTWNZ P Te Papa W.002928.
ordinata var. Drawida longatria Gates, 1930; Rec. Ind. Mus. 32: 285; ZSIC 3127. [N.O., p. 148]
oregonensis, Aktedrilus Strehlow, 1982; Can. J. Zool. 60(4): 593; USNM 68723–4. [N.O.S.S., p. 22]
oregonensis, Guaranidrilus Coates et Diaz, 1988; Proc. Biol. Soc. Wash. 101(4): 775; USNM 118242,
118243–45, ROMT 11226–8. [N.O.S.T., p. 18]
oregonensis, Peloscolex Brinkhurst, 1965; Proc. Acad. Sci. Phila. 117(4): 138; USNM 32623. [N.O., p. 148]
oregonensis, Phagodrilus McKey-Fender, 2001; Megadrilogica 8(11): 71; USNM 1000912 [no paratypes].
oregonensis, Plutellus F. Smith, 1937; Proc. U.S. Nat. Mus. 84(3009): 177; USNM 20247–52. [N.O., p. 148]
oreophila, Eisenia Szederjesi et Csuzdi, 2012; Zootaxa 3304: 36; HNHM 15911, 15912-13.
oreophila ss. Allolobophora mehadiensis Pop, 1978; Trav. Mus. Hist. Nat. Grigore Antipa 19: 255; MINB,
TIUB, ZMUM, OECO, BRCC. [N.O.S.P., p. 25]
oresbiosus, Proandricus Plisko, 2003; Afr. Invert. 44(2): 299; NMSA Olig.02440, Olig.02434.
orghidani, Allolobophora Botea, 1983; Rés. Expéd. Biospéol. C-R Cuba 4: 34; typus in auctoris collectione.
[N.O.S.S., p. 22]
orghidani, Fridericia Botea, 1970; Trav. Inst. Spéol. E. Racovitza 9: 186; typus in auctoris collectione.
[N.O.S.P., p. 25]
orghidani, Opistocysta Botea, 1983; Rés. Expéd. Biospéol. C-R Cuba 4: 30; typus in auctoris collectione.
[N.O.S.S., p. 22]
orghidani, Pristina Botea, 1983; Rés. Expéd. Biospéol. C-R Cuba 4: 23; typus in auctoris collectione.
[N.O.S.S., p. 22]
orientalis, Chaetogaster Stephenson, 1910; Rec. Ind. Mus. 5: 68; nom. nov. pro: C. pellucidus Stephenson,
1907. [N.O., p. 148]
orientalis, Clitelloides Finogenova, 1991; Zool. Zh. 70(8): 48; ZIAS 1/48004-9. [N.O.S.T., p. 18]
orientalis, Dendrobaena Černosvitov, 1940; Ann. Mag. Nat. Hist. 6: 444; BMNH 1949:12:7:19. [N.O., p. 148]
[vide Csuzdi et al. 2023 – Zootaxa 5255(1): 62–67.]^
orientalis, Ilyodrilus Sokolskaya, 1969; Euilyodrilus; Byull. Mosk. Obshch. Isp. Prir. Otd. Biol. 1: 64;
ZMUM 993, 1004, BMNH 1939:8:1:11-7 .[N.O., p. 148]
orientalis, Imetescolex Szederjesi, Pavlíček et Csuzdi; Zool. J. Linn. Soc. 20: 7; Holotype: HNHM/17665;
Paratypes: HNHM/8701 (n=8), HNHM/16925 (n=2) [HNHM/] 17666 (n=2); ZooBank.^
orientalis, Lamprortus P. Rodriguez, 1994; Can. J. Zool. 72(11): 1960; USNM 170428–30;
MNCN 16.03/3018; PMUK [as PNU] paratypus designatus sed innumeratus.
orientalis, Lumbricillus Shurova, 1974; Nauka, Novosibirsk, p. 133; IMBV 16003. [N.O.S.P., p. 25]
orientalis, Papillonais Sokolskaya, 1957; Trudy Amur. Icht. Exped. 4: 281. [N.O., p. 148]
orientalis, Pheretima Beddard, 1912; Amynthas; Philipps. J. Sci. (D), 7: 188. [N.O., p. 148]
orientalis, Rhynchelmis Yamaguchi, 1936; J. Fac. Sci. Hokkaido Univ. 5: 86. [N.O., p. 148]
orientalis, Typhoeus Beddard, 1883; Eutyphoeus; Ann. Nat. Hist. 12: 219. [N.O., p. 148]
orientalis ss. Monopylephorus irroratus Finogenova, 1982; Zool. Zh. 61(1): 10; ZIAS 1145293- 4.
[N.O.S.S., p. 22]
orientalis ss. Paranais litoralis Sokolskaya, 1964; Byull. Mosk. Obshch. Isp. Prir. Otd. Biol. 69: 67;
ZMUM 988–9. [N.O., p. 148]
orientalis var. Allolobophora jassyensis Michaelsen, 1897; Mitt. Mus. Hamb. 14: 69; ZMUH 4294.
[N.O., p. 148]
orientaloides ss. Dendrobaena alpina Zicsi, 1985; Rev. Suisse Zool. 92(2): 326; TIUB Z/6920, Z/6904.
[N.O.S.S., p. 22-23] [vide Csuzdi et al. 2023 – Zootaxa 5255(1): 62–67.]^
orionense, Allolobophora Zicsi, 1977; Rev. Suisse Zool. 84(3): 682; NHMG. [N.O.S.P., p. 25]
ornamentus, Haplotaxis Brinkhurst et Fulton, 1980; Rec. Queen Vict. Mus. 72: 1; QVMA 372-86.
[N.O.S.P., p. 25]
ornata, Diplocardia Gates, 1943; Ohio J. Sci. 43(3): 113; USNM 20968, 20631. [N.O., p. 148]
ornata, Pheretima Gates, 1929; Amynthas;Proc. U.S. Nat. Mus. 75(10): 20; USNM 19254,
BMNH 1928:2:4:2. [N.O., p. 148]
ornatus, Eminoscolex Michaelsen, 1927; Ark. Zool. 14(6): 6; NHRS 1952, ZMUH 9146. [N.O., p. 148]
ornatus, Limnodrilus Eisen, 1879; Clitellio; Bih. Svenska Akad. 5: 17. [N.O., p. 148]
ornatus ss. Argilophilus marmoratus Eisen, 1893; Plutellus, Megascolides; Zoe 4: 253;
MNHU 2368 (perditus), (MNHN 593 – typus dub.). [N.O., p. 148; N.O.S.T., p. 26]
orobia, Dichogaster Graff, 1957; Senck. Biol. 38(1/2): 138;SMFD 2811-2. [N.O., p. 148]
oroeli ss. Hormogaster pretiosoides Alvarez, 1971; Bol. R. Soc. Españ. Hist. Nat. (Biol.) 69: 110;
IEEM 3381–89. [N.O., p. 148]
orosiensis, Andiodrilus Michaelsen, 1912; Arch. Naturg., Abteil. A 78(9): 126; ZMUH 7753, MNHN;
[lapsus calami N.O., p. 148: Arch. Naturg. 78A ]
orthochaetus, Pachydrilus Delphy, 1921; Lumbricillus; Dissertation Paris. [N.O., p. 148]
orthostichon, Hypogaeon Schmarda, 1861; Lumbricus, Megascolides, Notoscolex, Tokea; Neue Wirbell. Th. 1 (2): 12; ZMUH 8615.
[N.O., p. 148]; vide Blakemore, 2019: Bull. Kanagawa Pref. Mus. (Nat. Sci.) 48: 61–68.
ortizi, Octolasium Alvarez, 1970; Bol. R. Soc. Españ. Hist. Nat. (BioI.) 68: 17; IEEM 3401–5. [N.O., p. 148]
ortonae, Glossodrilus Righi, 1988; Pap. Avul. Zool. 36(30): 342; DZSP ZU-1156A, ZU-1156-B.
[N.O.S.S., p. 23] ^
ortyi, Proandricus Plisko, 2000; Ann. Natal Mus. 41: 254; NMSA Olig.02802, Olig.02803, Olig.02792,
Olig.02799, Olig.02800.
oryzivorus, Aphanascus Stephenson, 1924; Rec. Ind. Mus. 26: 360; BMNH 1925:5:12:116. [N.O., p. 148]
osborni, Naidium Walton, 1906; Pristina; Amer. Natural. 40: 703. [N.O., p. 148]
osellai, Allolobophora Zicsi, 1981; Opusc. Zool. Budapest 17-18: 177; MSNV 433, 432, TIUB Z/8962.
[N.O.S.S., p. 23]
osellai, Dendrobaena Zicsi, 1970; Opusc. Zool. Budapest 10(2): 375; MSNV 19, TIUB. [N.O., p. 148]
oshogboensis, Hyperiodrilus Segun, 1976; Rev. Écol. Biol. Sol 13(4): 654; BMNH 1974:17:1–6,
NHMI 1973.1-10. [N.O.S.P., p. 25]
osmastoni, Pheretima Michaelsen, 1907; Amynthas; Jb. Hamb. wiss. Anst. 24(2): 163; ZMUH 7171,
ZSIC 2832, MNHU 7465. [N.O., p. 148]; MNHU 7465 (syntypus perditus). [N.O.S.T., p. 27]
osornoi, Chilota Zicsi et Csuzdi, 2001; Ber. Nat.-Med. Verein Inns. 88: 132; TIUB AF/4284, AF/4274.
ospensis, Helodrilus Mršić, 1991; Monogr. Earthworms Balkans I, p. 113; typus in auctoris
collectione 4588, 4587. [N.O.S.T., p. 18]
ostiensis, Astacopsidrilus Pinder et Erséus, 2000; Pap. Proc. Roy. Soc. Tasmania 134: 30; QVMA
[as QVM] 14: 3865, 14: 3866–3877, WAMP [as WAM] V 41-40 – V 41-42.
oswaldi, Kynotus Michaelsen, 1895; Abh. Ver. Hamb. 13: 12; typus amissus. [N.O., p. 148]
otarion, Belladrilus Righi, 1995; Rev. Suisse Zool. 102(2): 362; DZSP 1282A, MHNG 18880.
ostiensis, Astacopsidrilus Pinder et Erséus, 2000; Pap. Proc. Roy. Soc. Tasmania 134: 31;
QMVA [as QVM] 14:3865-38777, WAMP [as WAM] V 41-40 to 41-42.
oubatcheanus, Acanthodrilus Michaelsen, 1913; Nova Caledonia 1(3): 207; USNM 21030. [N.O., p. 149]
overlaeti, Gordiodrilus Michaelsen, 1936; Rev. Zool. Bot. Afr. 29: 55; MRAC. [N.O., p. 149]
oviatriatus, Coralliodrilus Erséus, 1981; Zool. Scripta 10(1): 26; QMBA 12537–43. [N.O.S.S., p. 23]
oviformis, Amynthas Y. Hong et James, 2001; Rev. Suisse Zool. 108(1): 72; KIBIO – holotypus et
3 paratypi designati sed innumerati.
ovitheca, Grania Erséus, 1977; Zool. Scripta 6: 296; NHRS [as SMNH] 3071–3. [N.O.S.P., p. 25]
oweri, Fridericia Stephenson, 1932; Proc. Zool. Soc. Lond., 1932, p. 239. [N.O., p. 149]
owyhee, Eremidrilus Rodriguez et Fend, 2022; Zootaxa 5159(2): 255; Holotype: USNM 1593361;
paratypes: USNM 1593362–1593366, 1593367; MNCN 16.03/3152, 16.03/3153–16.03/3154; ZooBank.^
oxcutzcabensis, Eodrilus Pickford, 1938; Carn. Inst. Wash., no. 491, p. 71; USNM 20982. [N.O., p. 149]
oxleyensis, Cryptodrilus Fletcher, 1889; Plutellus; Proc. Linn. Soc. N.S. Wales 3: 1537. [N.O., p. 149]
oxtobyae, Dichogaster (Diplothecodrilus) Csuzdi, 2000; Opsuc. Zool. Budapest 32: 69;
BMNH 1981:6:2783, 1981:6:2784, 1981:6:2829–2830, 1981:6:2704–2713, TIUB AF/3313, AF/3309.
oxycephalus, Aulophorus Schmarda, 1861; Dero; Neue Wirbell. Th. 1(2): 9. [N.O., p. 149]
oyamai, Pheretima Ohfuchi, 1937; Amynthas; Res. Bull. Saito Ho-on Kai Mus. 12: 62. [N.O., p. 149]
oyametlensis, Protozapotecia Cervantes et Fragoso, 2018; Zootaxa 4496(1): 434; Holotype: IEOL4198;
paratype: IEOL4199; ZooBank. ^
oyarzunana var. Scherotheca quipuzcoana Bouché, 1979; Doc. Pedozool. 1(1): 93; OECO 103-1931-0702.
[N.O.S.P., p. 25]
oyuensis, Pheretima Ohfuchi, 1937; Res. Bull. Saito Ho-on Kai Mus. 12: 24. [N.O.S.P., p. 25]
ozensis, Chamaedrilus Torii, 2015; Zootaxa 4000(4): 477; NSMT-An 468, NSMT-An 469–473. ^ Note:
see additional description for taxon Ch. cf. ozensis by Chen, Jiang et Xie (2016): Zootaxa 4093(2): 276. ^