Sabatieria brevicaudata, Fu & Zhang & Leduc & Mou & Lin, 2023

Fu, Sujing, Zhang, Shuyi, Leduc, Daniel, Mou, Jianfeng & Lin, Heshan, 2023, Two new species of Sabatieria de Rouville, 1903 (Nematoda: Araeolaimida: Comesomatidae) from the Southern Ocean, Zootaxa 5389 (5), pp. 563-581 : 566

Sabatieria brevicaudata sp. nov.

( Figures 2 – 5 , Table 2 )

Type material. Holotype male in inventory slide no. MBSMCOIA-C4-12-3-0-2-1. Paratypes: four males in inventory slide no. MBSMCOIA-MF1-2-2-5-2, MBSMCOIA-C4-11-3-2-5, and MBSMCOIA-M10D-3-2-5-3; four females in inventory slide no. MBSMCOIA-MF1-2-2-5-2, MBSMCOIA-C4-12-3-0-2-2 and MBSMCOIA-DE-05- 1-2-5.

Type locality and habitat. Holotype collected in the Cosmonauts Sea , 67.1217°S, 44.3743°E; depth 1321 m; 22 January 2021; total organic carbon 0.22%; sand, 50.73%; clay, 7.62%; silt 41.11%; mean particle diameter 4.49 μm. Paratypes collected in the Cosmonauts Sea and Prydz Bay ; 64.8980°S – 67.5388°S, 44.3743°E – 77.3473°E; depth 310–2720 m; 31 December 2020 – 22 January 2021; total organic carbon 0.22–1.37%; sand, 4.78–50.73%; clay, 7.62–23.70%; silt 41.11–75.37%; mean particle diameter 4.49–6.77 μm.

Etymology. The species epithet is named after the character of relatively short conical tail.

Figures

FIGURE 2. Sabatieria brevicaudata sp. nov. Paratypes.A. Entire male, showing the precloacal supplements (arrow); B. Entire female. Scale bar: A, B = 50 μm.

FIGURE 3. Sabatieria brevicaudata sp. nov. Paratypes. A. Male anterior body region; B. Female anterior body region; C. Male pharyngeal body region; D. Male posterior body region; E. Female posterior body region. Scale bar: A, B, C, D and E = 20 μm.

FIGURE 4. Sabatieria brevicaudata sp. nov. Light micrographs. A. Male paratype anterior body region showing the buccal cavity; B. Surface view of female paratype anterior body region showing cuticle punctations, amphidial fovea and cephalic sensilla; C. Lateral punctations of female paratype anterior body region; D. Vulva region showing vulva, vaginal glands (two arrows on the right) and spermatheca (left arrow); E. Male holotype spicular apparatus; F. Lateral punctations of female paratype posterior body region. A, B, C, E and F = 10 μm; D = 20 μm.

FIGURE 5. Sabatieria brevicaudata sp. nov. Scanning electron micrographs.A. Entire female; B. Female anterior body region showing cephalic sensilla; C. Female anterior body region showing amphidial fovea; D. Female posterior body region. Scale bar: A=100 μm; B, C and D = 10 μm.