Megamoera similidentata Labay, 2013, sp. nov.

• Main Author: Labay, Vjacheslav S.
• Format: Other/Unknown Material
• Language: unknown
• Published: Zenodo 2013
• Subjects: Biodiversity; Taxonomy; Animalia; Arthropoda; Malacostraca; Amphipoda; Melitidae; Megamoera; Megamoera similidentata; okhotsk sea; Sakhalin
• Online Access: https://doi.org/10.5281/zenodo.5620492; http://treatment.plazi.org/id/7B1F87EDFFF02C6BFF32FA5D60DC6F29

Megamoera similidentata sp. nov. Figures 1–9, 34 a Diagnosis . Pleon segments 1–3 with central tooth and 0–3 lateral denticles on each side; pleons 2 and 3 with large central tooth and 3 denticles, first of which is the smallest (may be reduced). Urosome segment 1 with central tooth and 1 lateral denticle; urosome 2 with 2 pairs of short teeth and single cuspidate seta. Telson lobes, proximal subapical notch more on outer margin. Anterior head lobe shallow, lower margin with prominent accessory process. Pereopod 1 (male) broadest distally, palm oblique, sharply angled from posterior margin. Pereopod 2 (male), anterior margin of dactyl strongly setose; palm oblique, convex, with low irregular hinge tooth and stout posterodistal tooth. Maxilla 1, palp segment 1 with 7–8 lateral setae. Maxilla 2, inner plate, facial setae reduced, marginal in position. Uropod 3, proximal segment of outer ramous slender, with 5 clusters of marginal stout simple setae. Type material . Holotype male, 34 mm, X 37855 Cr 1421, the north-east shelf of Sakhalin Island, Okhotsk Sea, Far East of Russia (51°42'N 143°53'E, 87 m), silt and sand, M.G. Rogotnev & P.V. Polupanov, 0 9 July 2010. Paratypes: 1 female, 28 mm, X 37856 Cr 1422; 2 males and 1 female X 37857 Cr 1423 with same data as holotype; 1 male X 37858 Cr 1424, the north-east shelf of Sakhalin Island, Okhotsk Sea, Far East of Russia (52°25'N 143°51'E, 101 m), sand, M.G. Rogotnev. Type locality . The north-east shelf of Sakhalin Island, Okhotsk Sea, Far East of Russia (51°42'N 143°53'E, 85–90 m). Description . Male (34 mm). Vital body color is grey-olive with an unclear picture of the diffuse bands and spots. Thoracic segments smooth dorsally, without teeth and humps (Fig. 1 a, b). Pleon segments 1 with centre tooth, without lateral denticles; pleons 2 and 3 with large centre tooth and 3 denticles, first of which is unclear. Urosome segment 1 with central tooth and 1 lateral denticle; urosome 2 with 2 pairs of short teeth and single cuspidate seta. Head: (Fig. 1 c) slightly ...