Sabatieria multisupplementia, Yang & Guo & Chen & Lin, 2019

Yang, Peipei, Guo, Yuqing, Chen, Yuzhen & Lin, Rongcheng, 2019, Four new free-living marine nematode species (Sabatieria) from the Chukchi Sea, Zootaxa 4646 (1), pp. 31-54 : 46-53

publication ID

https://doi.org/ 10.11646/zootaxa.4646.1.2

publication LSID

lsid:zoobank.org:pub:59DA470E-A7CA-4074-B964-42F937380F5A

DOI

https://doi.org/10.5281/zenodo.5587671

persistent identifier

https://treatment.plazi.org/id/03F287B5-FFB2-AD2A-FF49-7F1DFC77FD51

treatment provided by

Plazi

scientific name

Sabatieria multisupplementia
status

sp. nov.

Sabatieria multisupplementia sp. n.

( Figures 11–12 View FIGURE 11 View FIGURE 12 , Table 4 View TABLE 4 )

Type material. Three males were collected from station CC 1.

Holotype: ♂ 1 on slide number Chukchi20100720 CC14202 . Paratypes: ♂ 2 on slide number Chukchi20100720 CC14103 , ♂ 3 on Chukchi20100720 CC13102 .

Type locality and habitat. All specimens were collected from the Chukchi Sea (52 m water depth). Station CC 1: 67.6722°N, 168.9562°W. Median grain diameter: 5.35 Md Φ, Sand: 33.34%, Silt: 58.02%, Clay: 8.63%.

Etymology. The species name is derived from the latin prefix multi- (= many) and supplementia (=supplement), and refers to the many pre-cloacal supplements in this species relative to other species of the genus.

Measurements. Table 4 View TABLE 4 .

Description. Male. Body cylindrical, tapering slightly towards both extremities. Cuticle with transverse rows of dots, lateral differentiation consisting of larger, irregularly-spaced dots. Two dorso- and two ventro-lateral rows of short, sparse somatic setae. Three crowns of anterior sensilla: six indistinct inner labial papillae, six short but distinct outer labial setae and four long cephalic setae. Buccal cavity cup-shaped. Amphideal fovea spiral with 2.75–3 turns, located immediately posterior to cephalic setae. Pharynx gradually swelling towards posterior, not forming true bulb. Nerve ring 193–210 µm from anterior end of body, at 51–55% of the pharyngeal region length. Excretory pore 217–235 µm from anterior end of body, at 57–62% of the pharyngeal region length. Tail 291–299 µm long, conico-cylindrical with four rows of sparse short caudal setae and three short terminal setae. Reproductive system diorchic with outstretched testes. Anterior testis to the left of intestine, posterior testis to the right of intestine. Spicules paired, equal, arcuate, equal to 1.7–2.0 cloacal body diameters in length, and with central cuticularised projection (lamella) extending from proximal end to one half of spicule. Gubernaculum surrounding the distal part of the spicules, and with 59–63 µm long, paired, straight apophyses. Forty-one to fortyseven tubular pre-cloacal supplements, followed by one pre-cloacal seta. Three caudal glands situated posterior to spicule. Spinneret present.

Female. Not found.

Diagnosis and relationships. Sabatieria multisupplementia sp. n. is characterized by a long body (3967–4294 µm), short cephalic setae (5–7 µm, equal to 20–25% of head diameter), amphideal fovea spiral with 2.75–3 turns, and forty-one to forty-seven tubular pre-cloacal supplements.

Sabatieria multisupplementia sp. n. belongs to the praedatrix group and can be differentiated from all other species of the genus by its 41–47 pre-cloacal supplements. S. multisupplementia sp. n. resembles S. bubulba in lateral differentiation and presence of central cuticularised projection (lamella) extending from proximal end to one half of spicule, but can be distinguished from the latter by longer total body length (3967–4294 vs 1520–1750 µm) and longer spicules (equal to 1.7–2.0 vs 1.4–1.7 cloacal body diameters).

TABLE 4. Morphometrics (µm) of Sabatieria major sp. n. and Sabatieria multisupplementia sp. n.

Characters   Sabatieria major sp. n.   Sabatieria multisupplementia sp. n.
  Male Males Females Male Males
  holotype Paratypes Paratypes holotype Paratypes
n - 4 2 - 2
Total body length 4255 3972±116 (3879–4171) 4081–4197 4294 3967–4080
a 28 26±2 (24–28) 21–24 25 26–28
b 12 12 11–13 11 10–11
c 14 12±1 (11–13) 12 15 13 –14
Head diameter 27 23±1 (21–24) 23–24 26 25–26
Length of cephalic setae 7 5±1 (4–6) 5 5 6–7
Amphideal fovea from anterior end - 10±1 (9–11) 8–10 12 10 –13
Amphideal fovea diameter 10 13±1 (12–14) 12–13 15 14
Amphideal fovea diameter / corresponding body diameter (%) - 50±4 (45–56) 44–50 52 48
Nerve ring from anterior end 169 180±7 (169–186) 191–197 206 193–210
Nerve ring / pharyngeal length (%) 49 54±2 (51–56) 53–58 54 51–55
Excretory pore from anterior end - 200±9 (188–210) 196–223 235 217–219
Pharyngeal length 347 332±4 (327–339) 333–374 379 376–379
Pharyngeal end corresponding body diameter 109 115±8 (102–122) 120–132 125 113–133
Maximum body diameter 154 157±11 (138–166) 168–203 169 148–154
Vulva from anterior end - - 1897–2087 - -
V (%) - - 46–50 - -
Spicule length along arc 185 177±2 (175–181) - 180 175–183
Spicule length along chord 163 157±3 (153–161) - 149 139–152
Gubernacular apophyses length 81 76±5 (70–84) - 62 59–63
Number of pre-cloacal supplements 30 27±7 (17–32) - 47 41
Anal or cloacal body diameter 102 106±9 (91–115) 103–105 97 89–105
Tail length 314 346±14 (328–367) 347–351 291 295–299
c’ 3.1 3.3±0.3 (2.9–3.7) 3.3–3.4 3.0 2.8–3.4
CC

CSIRO Canberra Rhizobium Collection

V

Royal British Columbia Museum - Herbarium

GBIF Dataset (for parent article) Darwin Core Archive (for parent article) View in SIBiLS Plain XML RDF