Eudorella acuticaudata Akiyama & Gamô, 2012, sp. nov.

• Main Authors: Akiyama, Tadashi, Gamô, Sigeo
• Format: Other/Unknown Material
• Language: unknown
• Published: 2012
• Subjects: Biodiversity; Taxonomy; Animalia; Arthropoda; Malacostraca; Cumacea; Leuconidae; Eudorella; Eudorella acuticaudata; Okhotsk; Seta; okhotsk sea
• Online Access: https://zenodo.org/record/6178454; https://doi.org/10.5281/zenodo.6178454

Eudorella acuticaudata sp. nov. (Figs. 1–3) Eudorella sp. Akiyama 2009: 487. Material examined. Holotype, ovigerous female, 4.2 mm (dissected) (NSMT-Cr 22093), off Abashiri, southern Okhotsk Sea, 44 °07ˏN, 144 °, 34 ˏE – 44 °06ˏN, 144 ° 34 ˏ E, 305–309 m (KT-01- 14, St. AB- 5), 20 September, 2001. Paratypes: 2 ovigerous females, 4.2 mm (dissected) (NSMT-Cr 22094), off Abashiri (KT-01- 14, St. AB- 5); 2 adult males, 4.3, 6.5 mm (dissected) (NSMT-Cr 22095), 8 preparatory females, 4.2–6.7 mm (dissected) (NSMT-Cr 22096), off Abashiri, Hokkaido, Okhotsk Sea, 44 °06ˏN, 144 ° 42 ˏE– 44 °06ˏN, 144 ° 43 ˏE, 313–335 m (KT-04- 20, St. AB- 3), 12 September, 2004. Description. Ovigerous females (Figs.1, 2). The 11 specimens examined were classified into two size groups: 4.2–4.6 mm in length (6 specimens), and 5.7–6.7 mm in length (5 specimens). Data for the larger group are presented within parentheses. Body weakly calcified, with few setae (Fig. 1 A, B). Length of carapace 0.18–0.19 (0.19–0.20) times total body length, 1.0– 1.1 (1.1–1.2) times carapace width, and 1.0– 1.1 (1.0– 1.1) times carapace depth; upper front corner vaulted, with a bundle of short setae projecting upward; anterior margin not serrated; antennal notch (arrowheads in Fig. 1 C, D) with 0–3 (0–4) minute teeth on upper end and 2–3 (3–4) prominent teeth on lower end; inferior margin with 6–9 (10–17) teeth, foremost one large, directed forward. Pereon length 1.3–1.5 (1.3–1.5) times carapace length. Pleon length 0.53–0.55 (0.53–0.54) times total body length; dorso-posterior end of pleonite 5 without long setae; middle portion of posterior end of pleonite 6 pointed. Antenna 1 (Fig. 1 E) robust; 1 st article of peduncle with 2–3 (2–3) and 3 (2–4) plumose setae on lower and inner margin; 3 rd article of peduncle swollen at distal portion, shorter than 2 nd, with 3 (3–6) plumose and 1 simple setae on outer margin, 4 (4–6) plumose setae on inner margin, and 1 simple seta on frontal margin. Main flagellum as long as 2 nd article of peduncle, with 1 (1) simple seta ...