Paradoneis andreae Sikorski, 2017, n. sp.

• Main Author: Sikorski, Andrey
• Format: Other/Unknown Material
• Language: unknown
• Published: Zenodo 2017
• Subjects: Biodiversity; Taxonomy; Animalia; Annelida; Polychaeta; Paraonidae; Paradoneis; Paradoneis andreae; Finnmark
• Online Access: https://doi.org/10.5281/zenodo.6050887; http://treatment.plazi.org/id/5B0CE503946AFB548482492AFBE27962

Paradoneis andreae n. sp. (Figs 7, 8) Material examined. 2290 Tromsøsundet S15; 69.6573°N – 18.8813°E; 38 m; 23.04.2002; holotype (ZMBN 116015), three paratypes (ZMBN 116016) and 26 specimens. 2876 Finnmark 592; 70.0650°N – 29.0663°E; 88 m; 13.09.2003; four paratypes (ZMBN 116017) and 16 specimens. Description. Holotype longest specimen, complete, 14.5 mm long for 116 chaetigers, 0.4 wide at tenth chaetiger level. Branchial region slightly flattened (Fig. 8A), composed of wider than long segments; postbranchial region cylindrical, segments progressively longer than wide, ventrally divided in four rings (Fig. 8D); posterior region (last 12 chaetigers), cylindrical, composed of very short, almost discoidal segments. Preserved specimens light brown or yellowish. Prostomium with rounded tip, one and a half times as long as wide; antennae or insertion scar totally absent; eyes and apical sensory organ absent (Fig. 7A, 8A, B). Mouth ventrally oriented; anterior and lateral lips poorly developed; posterior lip extending to anterior margin of second chaetiger. Nuchal organs obliquely oriented, in a dorsolateral position (Fig. 8B); secondary ciliary organs absent. Prebranchial region with three chaetigers (Fig. 7A, 8A); branchiae extending to chaetiger 20 (to chaetiger 17–22, mean: 18.57, SD: 1.07, n: 21); progressively increasing in length from beginning to chaetiger 6, remaining branchiae similar in length to distance between bases, except the last two pairs, which are shorter; branchiae lanceolate (Fig. 8A), bent forward, bearing long ciliation on outer margin (Fig. 7A, B, 8C). Notopodial postchaetal lobe short and blunt, almost papiliform in prebranchial chaetigers (Fig. 7A); in branchial chaetigers, lobes progressively larger and subulate (Fig. 7A, B, 8C); in postbranchial chaetigers width progressively decreasing and length increasing (Fig. 7C), becoming cirriform in posterior-most chaetigers (Fig. 7D). Neuropodial postchaetal lobes as low ridges, of even height (Fig. 7B–D). Chaetae of pre- and branchial segments ...