taxonID	type	description	language	source
A113020BFFF19E532EEDFBE9FC7C6C23.taxon	diagnosis	Diagnosis. Body 1.2 – 4.5 mm long. Crystalloids present or absent. Outer labial and cephalic sensilla setiform. Outer labial sensilla long, usually 40 – 55 % of labial region diameter. Stoma usually with two subventral pockets, stomatal teeth 2 – 10 µm apart. Vaginal musculature well-developed. Male supplements 5 – 7 in number (usually 6), protruding, echinate, separated into two groups [2 + 4 (5)]. First and last supplements are often smaller than the others. Spicules comparatively short and wide, with bifurcated apex.	en	Gagarin, Vladimir G., Naumova, Tatyana V. (2011): Two nematode species of the family Tobrilidae (Enoplida) De Coninck, 1965 from Lake Baikal, Russia. Zootaxa 2815: 59-68, DOI: 10.5281/zenodo.202017
A113020BFFF19E572EEDFAABFCD16DCB.taxon	materials_examined	Type material. Holotype male, slide reference number 213, deposited in the collection of the Limnological Institute, Siberian Branch of the Russian Academy of Sciences (Irkutsk, Russia) Paratypes. One male and three females deposited in the collection of the Institute of Inland Waters Biology, Russian Academy of Sciences (Borok, Yaroslavl Province, Russia); six males and four females deposited in the collection of the Limnological Institute, Siberian Branch of Russian Academy of Sciences (Irkutsk, Russia).	en	Gagarin, Vladimir G., Naumova, Tatyana V. (2011): Two nematode species of the family Tobrilidae (Enoplida) De Coninck, 1965 from Lake Baikal, Russia. Zootaxa 2815: 59-68, DOI: 10.5281/zenodo.202017
A113020BFFF19E572EEDFAABFCD16DCB.taxon	description	Measurements. Table 1.	en	Gagarin, Vladimir G., Naumova, Tatyana V. (2011): Two nematode species of the family Tobrilidae (Enoplida) De Coninck, 1965 from Lake Baikal, Russia. Zootaxa 2815: 59-68, DOI: 10.5281/zenodo.202017
A113020BFFF19E572EEDFAABFCD16DCB.taxon	materials_examined	Type locality. Cape Gorevoi Utes, Lake Baikal, Siberia, Russia, depth 884 – 897 m, bitumen sediment. Collected by submersible “ MIR- 2 ”, 19 – 20 August 2009.	en	Gagarin, Vladimir G., Naumova, Tatyana V. (2011): Two nematode species of the family Tobrilidae (Enoplida) De Coninck, 1965 from Lake Baikal, Russia. Zootaxa 2815: 59-68, DOI: 10.5281/zenodo.202017
A113020BFFF19E572EEDFAABFCD16DCB.taxon	etymology	Etymology. The species name means “ amazing ”, “ wonderful ”.	en	Gagarin, Vladimir G., Naumova, Tatyana V. (2011): Two nematode species of the family Tobrilidae (Enoplida) De Coninck, 1965 from Lake Baikal, Russia. Zootaxa 2815: 59-68, DOI: 10.5281/zenodo.202017
A113020BFFF19E572EEDFAABFCD16DCB.taxon	description	Description. Male. Body cylindrical, tapering toward both extremities. Cuticle finely annulated, 1.3 – 1.7 µm thick at mid-body. Crystalloids absent. Somatic setae short and scarce anteriorly; becoming longer and denser in the posterior part of the body, level with supplements and on the tail. Lips well developed, high. Inner labial sensilla papilliform. Outer labial sensilla and cephalic sensilla setiform in shape, thin and articulated, arranged in a single circle. Six outer labial sensilla 11 – 13 µm long, about 38 – 43 % of labial region width. Cephalic sensilla 7 – 8 µm long. Cheilostom spacious; pharyngostom narrow, funnel-shaped, 12 – 14 µm long. Dorsal pocket and dorsal tooth not visible. Both subventral pockets, separate, located far apart. Teeth in pockets are comparatively small. Stoma 25 – 27 µm long, 0.7 – 0.9 labial region width. Amphidial fovea cup-shaped, amphid aperture located at the level of stoma pockets. Cervical setae absent. Pharynx muscular, comparatively long, expanding gradually towards its base. Nerve ring encircles pharynx at 43 – 48 % of pharyngeal length. Cardia small, surrounded by 3 oval glands. Renette, renette canal, ampulla and excretory pore not observed. Testes paired, opposed, situated to the left of intestine; anterior testis outstretched, posterior testis reflexed. Vas deferens well developed. Spicules 1.0 – 1.2 times as long as the cloacal body diameter, slender, slightly ventrally curved, with elongate-oval capitulum. Apical end of spicules bifurcated. Gubernaculum short, 14 – 16 µm long, with apical expansion. Precloacal supplementary organs echinate, 6 to 7 in number. Supplement ampullae slightly flattened, contents concentrated at ampulla basis. Supplement pads armed with small thorns (approximately 40 – 50 things) and one longer and thicker thorn, which protrude from the cuticle. Supplements arranged in two groups [2 + 4 (5)]. Row of supplements 221 – 300 µm long. Tail slender, long, with proximal conical and distal cylindrical portions, gradually merging into one another. Distal portion 1.5 – 1.7 times longer than proximal portion. Caudal setae 8 – 10 µm long, arranged in 5 – 6 subventral and 3 – 4 subdorsal pairs. Three caudal glands present, opening through short spinneret. Tail terminus with subterminal setae. Female. General morphology is similar to that of males in structure of cuticle and anterior body end. Cuticle finely annulated. Somatic setae short and scarce. Crystalloids and cervical setae absent. Labial region comparatively wide. Lips well developed, high. Inner labial sensilla papilliform. Six outer labial sensilla and four cephalic sensilla setiform in shape, thin and articulate, arranged in a single circle. Outer labial sensilla are longer than cephalic sensilla; outer labial sensilla as long as 38 – 42 % of labial region width. Cheilostom is comparatively small. Buccal cavity narrow, funnel-shaped; somewhat longer than the labial region diameter. Dorsal pocket and dorsal tooth not visible. Both subventral pockets small, separated and located far apart. Teeth in the pockets are comparatively small. Amphidial fovea cup-shaped, amphidial opening located at the level of buccal cavity. Pharynx muscular, comparatively long, expanding gradually towards its base. Cardiac glands large, 30 – 35 µm long. Renette and canal, ampulla and excretory pore not observed. Rectum 1.0 – 1.2 times as long as the anal body diameter. Reproductive system didelphic, amphidelphic. Ovaries situated to the left of intestine, reflexed and comparatively short. Oocytes numerous. Vulva a transverse slit, situated anterior to midbody, relatively close to anterior body end. Vulval lips sclerotized, protruding outside the body contour. Vulval glands not seen. Vagina short, its walls thin, not muscular. Uterus spacious, containing numerous spindle – shaped spermatozoa and 3 – 8 intrauterine eggs, measuring 71 – 107 × 40 – 61 µm. Tail long and slender, gradually narrowing towards the terminus. Caudal glands and spinneret well developed. Tail terminus with subterminal setae.	en	Gagarin, Vladimir G., Naumova, Tatyana V. (2011): Two nematode species of the family Tobrilidae (Enoplida) De Coninck, 1965 from Lake Baikal, Russia. Zootaxa 2815: 59-68, DOI: 10.5281/zenodo.202017
A113020BFFF19E572EEDFAABFCD16DCB.taxon	diagnosis	Diagnosis. Body 2.36 – 3.15 mm long in male, 2.96 – 3.71 mm long in female. Cuticle finely annulated. Crystalloids absent. Outer labial setae and cephalic setae arranged in single circle. Outer labial setae longer than cephalic setae and as long as 38 – 43 % of labial region width. Cheilostom comparatively small. Buccal cavity narrow, funnelshaped. Dorsal pocket absent. Subventral pockets separate, with small teeth. Vulva a transverse slit, situated relatively anterior along the body length. Uterus with numerous spermatozoa and 3 – 8 intrauterine eggs, measuring 71 – 107 x 40 – 61 µm. Males with comparatively short, slightly curved spicules and short gubernaculum. Precloacal supplements 6 to 7 in number, echinate, separated in two groups [2 + 4 (5)]. Tail slender, comparatively long, with subterminal setae. Differential diagnosis. Eutobrilus mirandus sp. n. differs from all species of the genus Eutobrilus by its markedly anterior vulva position (V = 26 – 31 % versus 39 – 55 % in other species of the genus). The new species is similar to E. andrassyi Altherr, 1963 in body size and stoma structure, but differs from it in the absence of crystalloids, comparatively thicker body (males, a = 32 – 45 versus a = 60 – 75 in E. andrassyi), shorter stoma (males, stoma 26 – 27 µm versus 35 – 40 µm in E. andrassyi) and longer spicules (48 – 53 µm versus 40 µm in E. andrassyi) (Altherr 1963; Tsalolikhin 1983, 2005; Gagarin 2009; Zullini, 2006).	en	Gagarin, Vladimir G., Naumova, Tatyana V. (2011): Two nematode species of the family Tobrilidae (Enoplida) De Coninck, 1965 from Lake Baikal, Russia. Zootaxa 2815: 59-68, DOI: 10.5281/zenodo.202017
A113020BFFF59E572EEDFAC3FD1F6CB1.taxon	diagnosis	Diagnosis. Body 1.8 – 2.8 mm long. Outer labial sensilla and cephalic sensilla setiform. Stoma large, barrel- or funnel-shaped. Stomatal pockets merged with the buccal cavity, with two or three teeth. Male supplements 6 – 8 in number, large, protruding, echinate, with pad and cap.	en	Gagarin, Vladimir G., Naumova, Tatyana V. (2011): Two nematode species of the family Tobrilidae (Enoplida) De Coninck, 1965 from Lake Baikal, Russia. Zootaxa 2815: 59-68, DOI: 10.5281/zenodo.202017
A113020BFFF59E5B2EEDF9D3FAB06850.taxon	materials_examined	Material. Ten mature males and 18 mature females. All slides are deposited in the collection of the Limnological Institute, Siberian Branch of the Russian Academy of Sciences (Irkutsk, Russia). Locality. Gorevoi Utes, Lake Baikal, Siberia, Russia, depth 20 m, 2 km from coast.	en	Gagarin, Vladimir G., Naumova, Tatyana V. (2011): Two nematode species of the family Tobrilidae (Enoplida) De Coninck, 1965 from Lake Baikal, Russia. Zootaxa 2815: 59-68, DOI: 10.5281/zenodo.202017
A113020BFFF59E5B2EEDF9D3FAB06850.taxon	description	Female. Body long, elongate, tapering toward both extremities. Cuticle finely annulated, 1.5 µm thick at midbody. Somatic setae short, scarce. Crystalloids present, bacilliform in shape. Cervical setae absent. Labial region high, offset from the adjacent body; lips well developed. Body diameter at the base of the pharynx 2.2 – 2.6 times as wide as the labial region diameter. Inner labial sensilla papilliform. Six outer labial sensilla and four cephalic sensilla setiform in shape, long and thin, arranged in a single circle. Outer labial sensilla longer than cephalic sensilla, extending 40 – 45 % of labial region width. Stoma funnel-shaped, slightly curved ventrally. Cheilostom spacious; pharyngostom funnel-shaped with comparatively thick walls. Dorsal pocket and its tooth are absent. Subventral pockets slightly separated from the buccal cavity, overlapping each other, and each with a single tooth. Amphidial fovea cup-shaped, amphidial opening is located at the level of buccal cavity. Pharynx muscular, comparatively long, expanding gradually towards its base. Cardiac glands large, oval, 30 – 35 µm in diameter. Renette, its canal, ampulla and excretory pore not observed. Reproductive system didelphic, amphidelphic. Ovaries comparatively short, situated to the left of intestine. Oocytes numerous, first in two rows, then as a single row. Vulva a transverse slit, situated slightly anterior to mid-body. Vulval lips sclerotized, not protruding past the body contour. Prevulval glands not observed. Vagina comparatively short, with thick walls. Uterus spacious, containing numerous spindleshaped spermatozoa and one or two intrauterine eggs, measuring 135 – 146 × 50 – 55 µm. Rectum 0.9 – 1.1 times as long as the anal body diameter. Tail slender, comparatively long, gradually narrowing to its terminus. Caudal glands and spinneret well developed. Males. General morphology is similar to that of females, in structure of cuticle and anterior part of the body. Testes paired, opposed, situated to the left of intestine; anterior testis outstretched, posterior testis reflexed. Vas deferens well developed. Spicules 1.4 – 1.5 times as long as cloacal body diameter, slender, curved ventrally, with developed capitulum. Gubernaculum short, with distal swelling. Precloacal supplements six in number, strongly protruding, echinate. Character Male (n = 10) Female (n = 10) Supplement ampulla slightly flattened, its contents concentrated at ampulla basis. Supplement pad large, armed with small thorns (approximately 40 – 50 things); cap is comparatively small, with large central thorn. Supplement array 250 – 331 µm long. Tail slender, long. Caudal setae 8 – 11 µm long, numerous. Three caudal glands open through short spinneret.	en	Gagarin, Vladimir G., Naumova, Tatyana V. (2011): Two nematode species of the family Tobrilidae (Enoplida) De Coninck, 1965 from Lake Baikal, Russia. Zootaxa 2815: 59-68, DOI: 10.5281/zenodo.202017
A113020BFFF59E5B2EEDF9D3FAB06850.taxon	distribution	Distribution. Paratrilobus delicatus was described on the basis of three males from Peschanaya Bay, Baikal (Shoshin, 1988). Females in the original population were not found. This is the second record of this species.	en	Gagarin, Vladimir G., Naumova, Tatyana V. (2011): Two nematode species of the family Tobrilidae (Enoplida) De Coninck, 1965 from Lake Baikal, Russia. Zootaxa 2815: 59-68, DOI: 10.5281/zenodo.202017
