taxonID	type	description	language	source
03BA87F8FFBD8F00FDD4BE0DFD4AB435.taxon	diagnosis	Diagnosis (from Tchesunov 2014) Body cylindrical. Cuticle distinctly annulated, without dots, but spines, fringes or longitudinal ornamentation may be present. No specialised ambulatory setae at anterior or posterior body regions. Locomotion is sinuous, typical for nematodes.	en	Leduc, Daniel (2025): New nematode species (Nematoda: Chromadorea) and records from the New Zealand continental shelf. European Journal of Taxonomy 981: 213-238, DOI: 10.5852/ejt.2025.981.2819, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2819/12855
03BA87F8FFBC8F01FDC0BDCAFDFDB596.taxon	diagnosis	Diagnosis (modified from Tchesunov 2014) Cuticle annulated except in cephalic region. Cephalic region with thickened cuticle except in lip region and set off as conspicuous cephalic capsule. Amphidial fovea generally not surrounded by annulation of body cuticle; may be located on a cuticularised plate. Buccal cavity mostly with distinct teeth. Pharyngeal bulb round to elongated.	en	Leduc, Daniel (2025): New nematode species (Nematoda: Chromadorea) and records from the New Zealand continental shelf. European Journal of Taxonomy 981: 213-238, DOI: 10.5852/ejt.2025.981.2819, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2819/12855
03BA87F8FFBC8F06FE14BED7FDFDB6DC.taxon	type_taxon	Type species Psammonema ovisetum Verschelde & Vincx, 1995.	en	Leduc, Daniel (2025): New nematode species (Nematoda: Chromadorea) and records from the New Zealand continental shelf. European Journal of Taxonomy 981: 213-238, DOI: 10.5852/ejt.2025.981.2819, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2819/12855
03BA87F8FFBC8F06FE14BED7FDFDB6DC.taxon	diagnosis	Diagnosis (emended from Muthumbi & Vincx 2016) Annulated cuticle with fine lateral alae beginning posterior to, or at level of, pharyngeal region. Females usually with both long slender somatic setae and short somatic setae. Six inner and six outer labial sensilla on anterior portion of the cephalic capsule, four cephalic sensilla on main portion of cephalic capsule; additional sub-cephalic setae may also occur on main portion of cephalic capsule. Sexual dimorphism usually present in shape and size of amphidial fovea; amphidial fovea located anteriorly on main portion of cephalic capsule, may extend to anterior portion of cephalic capsule. Buccal cavity with one large dorsal tooth and two ventrosublateral teeth; denticles usually present. Pharyngeal lumen not strongly cuticularized; posterior pharyngeal bulb present, may be elongated and partitioned by discontinuities in pharyngeal tissue. Precloacal supplements usually present (thorn-like or cuticular swellings).	en	Leduc, Daniel (2025): New nematode species (Nematoda: Chromadorea) and records from the New Zealand continental shelf. European Journal of Taxonomy 981: 213-238, DOI: 10.5852/ejt.2025.981.2819, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2819/12855
03BA87F8FFBC8F06FE14BED7FDFDB6DC.taxon	discussion	Remarks When erecting the genus, Verschelde & Vincx (1995) noted that Psammonema differs from the closelyrelated genus Pseudochromadora Daday, 1899 in the following traits: 1) position and shape of the lateral alae (narrower in Psammonema and beginning at level of pharynx instead of posterior to it), 2) anterior position of the amphids on the cephalic capsule (compared to central position in Pseudochromadora), 3) presence of denticles in the buccal cavity (absent in Pseudochromadora), 4) fine cuticular pharyngeal lumen (thick lumen cuticle with conspicuous valves in Pseudochromadora), 5) elongated tripartite pharyngeal bulb (bipartite in Pseudochromadora) and 6) two or three types of somatic setae in females (no differentiation in Pseudochromadora). Another difference between these genera is the absence of copulatory and / or postcloacal thorns in Psammonema (present in Pseudochromadora). The distinction between the two genera, however, has become less clear with the subsequent description of additional Psammonema species (Jacob et al. 2016; Muthumbi & Vincx 2016). The difference in lateral alae position no longer applies, as it is located posterior to the pharynx in Psammonema waweri Muthumbi & Vincx, 2016. The latter species also lacks denticles like species of Pseudochromadora. A prolonged tripartite bulb is only found in P. ovisetum, and not in the other Psammonema species. This leaves amphid position, pharyngeal lumen cuticularisation, differentiation of somatic setae in females and presence / absence of copulatory and postcloacal thorns as the characters that can be used to differentiate between the two genera. In the new species, the amphidial fovea is positioned anteriorly on the main portion of the cephalic capsule, the pharyngeal lumen is not cuticularised and copulatory and postcloacal thorns are absent, which agrees with the diagnosis of Psammonema. On the other hand, females of the new species have only one type of somatic setae, which agrees with the diagnosis of Pseudochromadora. On balance, my assessment is that the new species should be classified with Psammonema. List of valid species	en	Leduc, Daniel (2025): New nematode species (Nematoda: Chromadorea) and records from the New Zealand continental shelf. European Journal of Taxonomy 981: 213-238, DOI: 10.5852/ejt.2025.981.2819, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2819/12855
03BA87F8FFBB8F0BFDA2BE72FCA6B2AF.taxon	description	urn: lsid: zoobank. org: act: 3 E 6715 A 8 - EA 41 - 480 C- 8 B 95 - 0 AC 2342 AE 26 D Figs 2 – 4, Tables 2 – 3	en	Leduc, Daniel (2025): New nematode species (Nematoda: Chromadorea) and records from the New Zealand continental shelf. European Journal of Taxonomy 981: 213-238, DOI: 10.5852/ejt.2025.981.2819, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2819/12855
03BA87F8FFBB8F0BFDA2BE72FCA6B2AF.taxon	diagnosis	Diagnosis Psammonema buamphida sp. nov. is characterised by a body length of ca 840 – 1020 µm, the lateral alae extending from posterior to pharynx to beyond cloaca / anus, eight longitudinal rows of alternating long and short somatic setae, the main portion of cephalic capsule with vacuoles, the lip region set off from main portion of cephalic capsule by sutura, the large cryptospiral amphidial fovea (69 – 79 % cbd wide) and an unispiral amphidial aperture, no sexual dimorphism in the amphidal fovea shape or size, a pharyngeal bulb without conspicuous partitions; by the absence of thorns in females, and the absence of precloacal supplements, copulatory or postcloacal thorns in males. Differential diagnosis The new species differs from the other three species of the genus in having large cryptospiral amphidial fovea in both males and females (sexual dimorphism in amphidial fovea shape and size present in other species) and females having only one type of somatic setae (instead of two or three types in the other species).	en	Leduc, Daniel (2025): New nematode species (Nematoda: Chromadorea) and records from the New Zealand continental shelf. European Journal of Taxonomy 981: 213-238, DOI: 10.5852/ejt.2025.981.2819, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2819/12855
03BA87F8FFBB8F0BFDA2BE72FCA6B2AF.taxon	etymology	Etymology The species epithet is derived from the latin prefix ‘ bu- ’ (= ‘ large’, ‘ huge’, ‘ great’) and refers to the large size of the amphidial fovea in both sexes of this species.	en	Leduc, Daniel (2025): New nematode species (Nematoda: Chromadorea) and records from the New Zealand continental shelf. European Journal of Taxonomy 981: 213-238, DOI: 10.5852/ejt.2025.981.2819, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2819/12855
03BA87F8FFBB8F0BFDA2BE72FCA6B2AF.taxon	materials_examined	Type material Holotype NEW ZEALAND CONTINENTAL SHELF • ♂; North Island, east coast off Poverty Bay; 38.7641 ° S, 178.1942 ° E; depth 54 m; 16 Jun. 2023; Alan Orpin leg.; voyage KAH 2303, station 66, sandy mud sediments (83 % silt / clay); NIWA 181622. Paratypes NEW ZEALAND CONTINENTAL SHELF • 2 ♂♂, 2 ♀♀; same data as for holotype; NIWA 181623 • 1 ♂, 2 ♀♀; Tokomaru Bay; 38.1316 ° S, 178.5839 ° E; depth 42 m; 16 Jun. 2023; Alan Orpin leg.; voyage KAH 2303, station 45, sandy mud sediments (77 % silt / clay); NIWA 181624.	en	Leduc, Daniel (2025): New nematode species (Nematoda: Chromadorea) and records from the New Zealand continental shelf. European Journal of Taxonomy 981: 213-238, DOI: 10.5852/ejt.2025.981.2819, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2819/12855
03BA87F8FFBB8F0BFDA2BE72FCA6B2AF.taxon	description	Description Males Body short, stout, cylindrical, with slight golden-brown colouration, tapering slightly towards anterior and posterior extremities. Cuticle 4 – 5 μm thick, with ca 2 μm wide annulations; lateral alae extending from level of cardia or slightly further posterior to cardia to slightly posterior to cloaca, cuticle annulations sometimes interdigitate at level of lateral alae depending on angle of specimen. Eight longitudinal rows of somatic setae present, 7 – 16 μm long setae (longest in posterior half of body) alternating with shorter 2 – 4 μm long setae. Blunt, truncated cephalic region not offset from rest of body. Non-annulated cephalic capsule 16 – 29 μm wide, 26 – 33 μm high, with main portion surrounded by slightly thickened cuticle with numerous small vacuoles; lip region separated from main portion of cephalic capsule by fold in cuticle (sutura), may be extended anteriorly. Circle of six conical inner labial papillae surrounding buccal opening followed by circle of six slightly smaller outer labial papillae located slightly further posteriorly on lip region. Four short cephalic setae, ca 0.1 – 0.2 cbd long, at level of sutura and anterior edge of amphidial fovea. Amphidial fovea large, cryptospiral, located on main portion of cephalic capsule. Amphidial aperture unispiral; aperture width narrowest anteriorly and widest posteriorly. Mouth opening surrounded by cuticular folds (cheilorhabdia). Buccal cavity medium-sized, with large, conspicuous, cuticularised dorsal tooth and two smaller ventrosublateral teeth; ring of 8 – 10 denticles spanning both ventrosublateral sectors either side of the ventrosublateral teeth. Ducts of pharyngeal glands not observed. Pharynx muscular, lumen not cuticularised; anterior portion surrounding buccal cavity, slightly swollen. Posterior pharyngeal bulb present, 52 – 62 µm long, without conspicuous partitions. Nerve ring located near middle of pharynx. Secretory-excretory system not observed. Cardia short, 8 – 10 μm long, not surrounded by intestinal tissue. Reproductive system with single outstretched testis located to the right of intestine; sperm cells globular or spherical, 9 – 19 × 14 – 26 µm. Spicules short, 1.4 – 1.5 cloacal body diameters long, arcuate, with swollen proximal portion (capitulum); velum not observed. Bent or curved gubernaculum without apophyses, ca 35 – 45 % of spicule length, flanking spicules distally. Precloacal supplements not observed; copulatory and postcloacal thorns absent. Tail conical, with 4 – 12 μm long subventral and subdorsal setae. Three caudal glands and spinneret present. Non-annulated tail tip 19 – 22 μm long. Females Similar to males but with slightly lower values of a (14 – 15 vs 15 – 18 in males) and slightly higher values of c (10 – 11 vs 7 – 9 in males). Reproductive system with two opposed and reflexed ovaries located ventrally relative to intestine. Mature eggs and spermatheca not observed. Vulva located slightly posterior to mid-body. Cuticular pars distalis vaginae.	en	Leduc, Daniel (2025): New nematode species (Nematoda: Chromadorea) and records from the New Zealand continental shelf. European Journal of Taxonomy 981: 213-238, DOI: 10.5852/ejt.2025.981.2819, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2819/12855
03BA87F8FFB68F0BFDBABA71FC46B052.taxon	diagnosis	Diagnosis (from Fonseca & Bezerra 2014) Cuticle striated. Six outer labial setae and four cephalic setae in one circle, with cephalic setae shorter than or at most equal to labial ones. Often additional cephalic setae and occasionally eight groups of sub-cephalic setae are present. Stoma usually funnel-shaped, completely, or only at the base surrounded by pharyngeal tissue. Ventral gland mostly absent (or invisible under light microscopy). Females with one (anterior) ovary to the left side of intestine. Males usually with two testes, the anterior one to the left side of intestine, the posterior one (may be absent) to the right side.	en	Leduc, Daniel (2025): New nematode species (Nematoda: Chromadorea) and records from the New Zealand continental shelf. European Journal of Taxonomy 981: 213-238, DOI: 10.5852/ejt.2025.981.2819, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2819/12855
03BA87F8FFB68F08FDDDBB13FDBDB72A.taxon	type_taxon	Type species Paramonohystera megacephala (Steiner, 1916).	en	Leduc, Daniel (2025): New nematode species (Nematoda: Chromadorea) and records from the New Zealand continental shelf. European Journal of Taxonomy 981: 213-238, DOI: 10.5852/ejt.2025.981.2819, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2819/12855
03BA87F8FFB68F08FDDDBB13FDBDB72A.taxon	diagnosis	Diagnosis (modified from Fonseca & Bezerra 2014 and Yu & Xu 2015) Conspicuous lip region bearing six inner labial papillae. Six outer labial setae and four cephalic setae situated in single circle at base of lip region; two additional lateral setae sometimes present. Medium to large buccal cavity funnel-shaped. Amphidial fovea circular or elliptical. Spicules elongate (> 2 cloacal body diameter long), gubernaculum usually tubular and without apophyses.	en	Leduc, Daniel (2025): New nematode species (Nematoda: Chromadorea) and records from the New Zealand continental shelf. European Journal of Taxonomy 981: 213-238, DOI: 10.5852/ejt.2025.981.2819, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2819/12855
03BA87F8FFB68F08FDDDBB13FDBDB72A.taxon	discussion	Remarks Gerlach & Riemann (1973) noted that Paramonhystera as used by Filipjev (1918: 279) and several subsequent workers is an invalid emendation. The genus was most recently revised by Yu & Xu (2015) and a list of valid species was most recently provided by Zhai et al. (2022). An additional species was subsequently described by Leduc & Zhao (2023).	en	Leduc, Daniel (2025): New nematode species (Nematoda: Chromadorea) and records from the New Zealand continental shelf. European Journal of Taxonomy 981: 213-238, DOI: 10.5852/ejt.2025.981.2819, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2819/12855
03BA87F8FFB58F0DFDCDBC0EFDD9B098.taxon	description	urn: lsid: zoobank. org: act: 960 CE 6 DF-E 1 BA- 412 D- 97 D 9 - FE 0 D 06 A 596 EB Figs 5 – 7, Tables 2, 4	en	Leduc, Daniel (2025): New nematode species (Nematoda: Chromadorea) and records from the New Zealand continental shelf. European Journal of Taxonomy 981: 213-238, DOI: 10.5852/ejt.2025.981.2819, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2819/12855
03BA87F8FFB58F0DFDCDBC0EFDD9B098.taxon	diagnosis	Diagnosis Paramonohystera spinosispicula sp. nov. is characterised by body length 1393 – 1716 µm, the outer labial setae at same level as, and similar in size to, the four jointed cephalic setae, the four short subcephalic setae located subdorsally and subventrally at level of amphids, and circular amphidial fovea (57 – 69 % cbd in males, 50 – 57 % cbd in females). Males have spicules 3.9 – 4.4 cloacal body diameters long with distal fifth to quarter swollen and covered in small spines; by the gubernaculum with pointed proximal projections extending along spicules dorsally, laterally and ventrally, and distal end with several small, pointed protuberances. Female reproductive system with spermatheca and a post-vulval sac. Differential diagnosis The new species differs from all other species of the genus in the structure of the spicules, which are swollen distally with numerous small spines (vs smooth and lacking spines in all other species). In terms of spicules length, P. spinosispicula sp. nov. is most similar to P. sinica (3.9 – 4.4 vs 4.0 – 4.4 cloacal body diameters in P. sinica), but can be differentiated from the latter by the greater body length (1393 – 1716 vs 933 – 1023 μm in P. sinica), the number of combined cephalic setae and outer labial setae (10 vs 12 in P. sinica), and shorter tail (cˊ = 4.2 – 5.2 vs 5.7 – 6.6 in P. sinica).	en	Leduc, Daniel (2025): New nematode species (Nematoda: Chromadorea) and records from the New Zealand continental shelf. European Journal of Taxonomy 981: 213-238, DOI: 10.5852/ejt.2025.981.2819, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2819/12855
03BA87F8FFB58F0DFDCDBC0EFDD9B098.taxon	etymology	Etymology The species epithet is derived from the latin ‘ spinosus ’ (= ‘ thorny’) and refers to the numerous small thorns on the distal part of the spicules in this species.	en	Leduc, Daniel (2025): New nematode species (Nematoda: Chromadorea) and records from the New Zealand continental shelf. European Journal of Taxonomy 981: 213-238, DOI: 10.5852/ejt.2025.981.2819, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2819/12855
03BA87F8FFB58F0DFDCDBC0EFDD9B098.taxon	materials_examined	Type material Holotype NEW ZEALAND CONTINENTAL SHELF • ♂; North Island, east coast off Hawke Bay; 39.2186 ° S, 177.4321 ° E; depth 47 m; 5 Jun. 2023; Alan Orpin leg.; voyage KAH 2303, station 16, sandy mud sediments (92 % silt / clay); NIWA 181625. Paratypes NEW ZEALAND CONTINENTAL SHELF • 3 ♂♂, 4 ♀♀; same data as for holotype; NIWA 181626.	en	Leduc, Daniel (2025): New nematode species (Nematoda: Chromadorea) and records from the New Zealand continental shelf. European Journal of Taxonomy 981: 213-238, DOI: 10.5852/ejt.2025.981.2819, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2819/12855
03BA87F8FFB58F0DFDCDBC0EFDD9B098.taxon	description	Description Males Body colourless, cylindrical, tapering slightly towards both extremities. Cuticle slightly striated, no lateral differentiation. Eight rows of sparsely distributed somatic setae, 2 – 4 µm long. Cephalic region set-off by slight constriction at level of amphids; well-developed lip region bearing six small labial papillae. Six outer labial setae, 0.4 – 0.6 cbd long, in same circle as four jointed cephalic setae of similar length. Four short, 3 – 4 µm long sucephalic setae present subdorsally and subventrally at level of amphids. Amphidial fovea large, circular, with slightly cuticularised outline and almost entirely surrounded by cuticle striations, ca 0.4 – 0.5 cbd from anterior extremity. Buccal cavity large, funnel- to barrel-shaped, with cuticularised walls, 7 – 11 µm deep, 5 – 6 µm wide, without teeth. Pharynx muscular, anterior portion surrounding buccal cavity, widening gradually posteriorly. Nerve ring located near middle of pharynx. Secretory-excretory system not observed. Cardia ca 12 – 14 µm long, surrounded by intestinal tissue. Reproductive system with two outstretched testes; anterior testis to the left of intestine, posterior testis to the right of intestine. Sperm cells small, globular to spherical, 3 – 5 × 4 – 5 µm. Spicules thin, elongated, 3.9 – 4.4 cloacal body diameters long, cuticularised along almost entire length; distal fifth to quarter of spicules swollen, less strongly cuticularized, covered in small, dense spines pointing towards spicule’s proximal extremity. Gubernaculum ca 40 μm long, forming sheath surrounding distal quarter of spicules, with pointed proximal projections extending along spicules dorsally, laterally and ventrally; distal end of gubernaculum with several small, pointed protuberances, each with internal duct. Precloacal supplements and seta not observed. Three pairs of ejaculatory glands present slightly anterior to spicules. Tail conicocylindrical with rows of subventral and subdorsal setae, 2 – 10 μm long; three terminal setae 20 – 29 µm long. Three caudal glands and spinneret present. Females Similar to males but with generally wider cephalic and maximum body diameter, amphidial fovea slightly smaller (as % cbd) and tail with sparse setae. Reproductive system with single outstretched ovary to the left of intestine. Spermatheca present; post-vulval sac 65 – 87 μm long, 13 – 20 μm wide. Vaginal glands present. Vulva located near mid-body body or slightly posterior. Pars proximalis vaginae surrounded by constrictor muscle.	en	Leduc, Daniel (2025): New nematode species (Nematoda: Chromadorea) and records from the New Zealand continental shelf. European Journal of Taxonomy 981: 213-238, DOI: 10.5852/ejt.2025.981.2819, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2819/12855
03BA87F8FFB08F0DFDDABC69FAE2B6EB.taxon	diagnosis	Diagnosis (from Fonseca & Bezerra 2014) Cuticle striated and / or ornamented with dots in transverse rows, usually differentiated laterally, sometimes with weakly cuticularized body pores. Anterior sensilla usually in three crowns, two crowns may also occur. Amphidial fovea multispiral. Buccal cavity in two compartments with globular, cup-shaped or shallow anterior portion. Posterior portion of the buccal cavity either narrow, weakly cuticularized, collapsed tube or a dilated, cylindrical to conical portion with cuticularized walls and projections at the border between the two portions. Pharynx with three marginal tubes. Pharyngeal gland opening at the bottom of the buccal cavity. Excretory pore behind the nerve ring. Female reproductive system didelphic-amphidelphic with outstretched ovaries, spermatheca present. Male gonads diorchic with opposite and outstretched testes. Copulatory apparatus with weakly to strongly cuticularized spicules and gubernaculum; paired apophyses of variable position. Precloacal supplements usually tubular. Tail conico-cylindrical with tip slightly dilated, non-cuticularized, symmetrical and with three terminal setae.	en	Leduc, Daniel (2025): New nematode species (Nematoda: Chromadorea) and records from the New Zealand continental shelf. European Journal of Taxonomy 981: 213-238, DOI: 10.5852/ejt.2025.981.2819, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2819/12855
03BA87F8FFB08F10FDB1BE7BFE78B789.taxon	type_taxon	Type species Sabatieria cettensis Rouville, 1903.	en	Leduc, Daniel (2025): New nematode species (Nematoda: Chromadorea) and records from the New Zealand continental shelf. European Journal of Taxonomy 981: 213-238, DOI: 10.5852/ejt.2025.981.2819, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2819/12855
03BA87F8FFB08F10FDB1BE7BFE78B789.taxon	diagnosis	Diagnosis (modified from Jensen 1979 and Rosli et al. 2014) Cuticle usually punctated, sometimes with lateral differentiation of larger or irregular punctations; in rare cases cuticle may appear striated or smooth. Four cephalic setae longer than the six outer labial setae. Anterior buccal cavity globular to cup-shaped, posterior buccal cavity narrow; small teeth-like structure sometimes present at the base of the anterior buccal cavity. Spicules usually short and arcuate; gubernaculum with dorsocaudal or caudal apophyses.	en	Leduc, Daniel (2025): New nematode species (Nematoda: Chromadorea) and records from the New Zealand continental shelf. European Journal of Taxonomy 981: 213-238, DOI: 10.5852/ejt.2025.981.2819, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2819/12855
03BA87F8FFB08F10FDB1BE7BFE78B789.taxon	discussion	Remarks Sabatieria is a species-rich genus, with a total of 82 valid species described prior to this study. The type species S. cettensis was considered species dubia by Filipjev (1922) and Wieser (1954). List of valid species	en	Leduc, Daniel (2025): New nematode species (Nematoda: Chromadorea) and records from the New Zealand continental shelf. European Journal of Taxonomy 981: 213-238, DOI: 10.5852/ejt.2025.981.2819, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2819/12855
03BA87F8FFAD8F15FDB1BCAFFC79B02F.taxon	description	urn: lsid: zoobank. org: act: 70 EFC 669 - 684 B- 4245 - 99 C 5 - 9 C 5 B 503 B 2 B 9 A Figs 8 – 10, Tables 2, 5	en	Leduc, Daniel (2025): New nematode species (Nematoda: Chromadorea) and records from the New Zealand continental shelf. European Journal of Taxonomy 981: 213-238, DOI: 10.5852/ejt.2025.981.2819, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2819/12855
03BA87F8FFAD8F15FDB1BCAFFC79B02F.taxon	diagnosis	Diagnosis Sabatieria pararticulata sp. nov. is characterized by body length of 1245 – 1490 μm, a cuticle without lateral differentiation, spiral amphidial fovea with 2 ½ – 2 ¾ turns, and a tail 3.3 – 4.0 cloacal / anal body diameters long. Males have slightly bent, jointed, 2.6 – 3.0 cloacal body diameters long spicules, gubernaculum with straight dorso-caudal apophyses, and 7 – 9 minute, pore-like precloacal supplements. The vulva is located slightly anterior to the mid-body. Differential diagnosis Sabatieria pararticulata sp. nov. belongs to the praedatrix group, which is characterized by simple tubular or pore-like precloacal supplements, straight gubernacular apophyses, cuticle usually with lateral differentiation of larger, more widely-spaced dots, and amphidial fovea usually with three turns (Platt 1985). The new species differs from all other species in this group, as well as all other species from the genus, except S. articulata Fu, Leduc & Zhao, 2019, in having jointed spicules. The new species can be distinguished from the latter by the shorter body length (1245 – 1490 vs 1758 – 2177 μm in S. articulata), cuticle without lateral differentiation (vs lateral differentiation present in S. articulata), amphidial fovea with slightly fewer turns (2 ½ – 2 ¾ vs 3 turns in S. articulata), fewer precloacal supplements (7 – 9 vs 10 – 14 precloacal supplements in S. articulata), and sperm dimorphism between the anterior and posterior testes (vs no sperm dimorphism in S. articulata).	en	Leduc, Daniel (2025): New nematode species (Nematoda: Chromadorea) and records from the New Zealand continental shelf. European Journal of Taxonomy 981: 213-238, DOI: 10.5852/ejt.2025.981.2819, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2819/12855
03BA87F8FFAD8F15FDB1BCAFFC79B02F.taxon	etymology	Etymology The species epithet refers to the close similarity between the new species and Sabatieria articulata Fu, Leduc & Zhao, 2019, which like the new species possesses long, jointed spicules.	en	Leduc, Daniel (2025): New nematode species (Nematoda: Chromadorea) and records from the New Zealand continental shelf. European Journal of Taxonomy 981: 213-238, DOI: 10.5852/ejt.2025.981.2819, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2819/12855
03BA87F8FFAD8F15FDB1BCAFFC79B02F.taxon	materials_examined	Type material Holotype NEW ZEALAND CONTINENTAL SHELF • ♂; North Island, east coast off Hawke Bay; 39.2186 ° S, 177.4321 ° E; depth 47 m; 5 Jun. 2023; Alan Orpin leg.; voyage KAH 2303, station 16, sandy mud sediments (92 % silt / clay); NIWA 181627. Paratypes NEW ZEALAND CONTINENTAL SHELF • 3 ♂♂, 2 ♀♀; same data as for holotype; NIWA 181628.	en	Leduc, Daniel (2025): New nematode species (Nematoda: Chromadorea) and records from the New Zealand continental shelf. European Journal of Taxonomy 981: 213-238, DOI: 10.5852/ejt.2025.981.2819, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2819/12855
03BA87F8FFAD8F15FDB1BCAFFC79B02F.taxon	description	Description Males Body colourless, cylindrical, tapering slightly towards both extremities. Cuticle punctated, without lateral differentiation. Sparsely distributed somatic setae present along entire body length, 2 – 3 µm long. Slightly rounded cephalic region, set off from rest of body by slight constriction at level of amphids. Six small inner labial papillae present on lip region; six outer labial papillae in a separate circle and four cephalic setae situated further posteriorly, 0.4 – 0.5 cbd long. Amphidial fovea large, spiral, situated immediately posterior to cephalic setae, with 2 ½ – 2 ¾ turns. Buccal cavity medium-sized, cup-shaped, with slightly cuticularised walls. Pharynx muscular, partially surrounding buccal cavity, widening posteriorly but not forming true bulb. Pharyngeal gland ducts visible, connecting with pharyngeal lumen at level of amphids. Nerve ring located near half of pharynx length. Secretory-excretory gland located immediately posterior to pharynx; secretory-excretory pore situated ca 1.0 cbd posterior to nerve ring, with two small, nucleated accessory glands. Cardia short, 6 – 9 μm long, surrounded by intestinal tissue. Reproductive system with two opposed outstretched testes; anterior testis to the left of intestine, posterior testis to the right of intestine. Sperm cells globular to ovoid, dimorphic, slightly larger in anterior testis (5 – 9 × 14 – 20 µm) than posterior testis (4 – 5 × 9 – 12 µm). Spicules slightly bent, 2.6 – 3.0 cloacal body diameters long, with joint present at 40 – 45 % of spicules length from the proximal end; central lamella present in proximal third to half of spicule. Gubernaculum with straight dorso-caudal apophyses. Seven to nine minute, pore-shaped precloacal supplements; posteriormost supplement 12 – 33 μm from cloaca. Distance between supplements 11 – 27 μm, may decrease slightly anteriorly, increase slightly anteriorly, or show no obvious pattern. Precloacal seta present. Ejaculatory glands not observed. Tail conicocylindrical, with sparse subventral setae and sparse subdorsal setae, 2 – 3 μm long; three terminal setae, 4 – 6 µm long. Three caudal glands present. Females Similar to males but with slightly longer tail. Reproductive system with two opposed, outstretched ovaries; anterior ovary to the left of intestine, posterior ovary to the right of intestine. Spermatheca not clearly defined. Vulva located near mid-body; vaginal glands present.	en	Leduc, Daniel (2025): New nematode species (Nematoda: Chromadorea) and records from the New Zealand continental shelf. European Journal of Taxonomy 981: 213-238, DOI: 10.5852/ejt.2025.981.2819, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2819/12855
