Holodentata caeca Doti, Choudhury & Brandt, 2009, sp. nov.

• Main Authors: Doti, Brenda Lía, Choudhury, Madhumita, Brandt, Angelika
• Format: Other/Unknown Material
• Language: unknown
• Published: 2009
• Subjects: Biodiversity; Taxonomy; Animalia; Arthropoda; Malacostraca; Isopoda; Paramunnidae; Holodentata; Holodentata caeca; Seta; Weddell; Weddell Sea
• Online Access: https://zenodo.org/record/5413900; https://doi.org/10.5281/zenodo.5413900

Holodentata caeca sp. nov. (Figs. 1–5, 10D) Holotype: 1 ovigerous ♀ (1.6 mm), ZMH –41970, Weddell Sea; Station 133–2, (62°46.73’S, 53°02.57’W), depth 1584 m, 16 March 2005, RV Polarstern. Paratypes: same locality as holotype: 25 brooding ♀ (1.2–1.5 mm), 87 preparatory ♀ (1.2–1.4 mm), 81 adult ♂♂ (0.9–1.4 mm) and 5 juveniles (0.8–0.9 mm) (ZMH –41971). Diagnosis. Head anterior lobe rounded and curving upward in lateral view. Eyestalk long axis points laterally, without ommatidia. Lateral margin of pereonites 1–3 expanded into a subquadrate projection, 4 rounded and 5–7 produced into a single processes. Coxal plates produced into processes. Description of ovigerous female (habitus description based on the holotype ZMH–41970, description of appendages on the paratype ZMH–41971). Length: 1.6 mm (Fig. 1A, B). Body width 0.6 length, widest at pereonite 3. Head width 2.2 length; anterior lobe rounded and curving upward in lateral view, margin with small denticles (broken off in the specimen illustrated, Fig. 1C). Apex of eyestalks denticulated, long axis pointing laterally, without ommatidia. Lateral margin of pereonites 1–3 expanded into a subquadrate projection, 4 rounded and 5–7 produced into single processes. Pereonite 1 about as long as pereonite 2, pereonite 2 <3> 4> 5<6 = 7 = free pleonite. Pereonite 5 shortest and pereonite 3 longest. Coxal plates produced into processes and denticulated, visible in dorsal view in all pereonites. Pleotelson width 1.2 length, marginally with 21–23 denticles on each side, apex pointed. Antennula (Fig. 2B), article 1 largest, with 1 simple seta and 5 robust denticles on one side; article 2 0.7 length of article 1, with 4 broom and 3 simple setae; article 3 shorter than article 2, with 1 simple seta, article 4 shortest with 1 broom seta, article 5 slightly longer than article 6 without setation; article 6 with 4 simple setae and 1 aesthetasc. Antenna (Fig. 2A), article 1 without setation, article 2 with 1 simple seta, article 3 with 5 robust denticles on each side and 3 ...