Exitomelita lignicola Tandberg & Rapp & Schander & Vader 2013, sp. nov.

• Published in: Water
• Main Authors: Tandberg, Anne Helene S., Rapp, Hans Tore, Schander, Christoffer, Vader, Wim
• Format: Other/Unknown Material
• Language: unknown
• Published: Zenodo 2013
• Subjects: Biodiversity; Taxonomy; Animalia; Arthropoda; Malacostraca; Amphipoda; Melitidae; Exitomelita; Exitomelita lignicola; Norwegian Sea
• Online Access: https://doi.org/10.5281/zenodo.5197033

Exitomelita lignicola sp. nov. Tandberg and Vader (Figures 2–6) Type material Holotype ZMBN 87905. Paratypes ZMBN 87906, ZMBN 87907, ZMBN 87908. Type locality The material was found in a large wood fall of Siberian pine at the south-eastern Knipovich Ridge in the Norwegian Sea. 73 ◦ 33.19 ′ N, 08 ◦ 16.9 ′ E, 2830 m depth. Material examined In addition to the four type specimens 38 additional specimens were found in the same piece of wood (see Table 1). Morphological description Adult size from 15 to 20 mm. Pereon elongate and smooth, with metasome and urosome bearing dorsal teeth (Figure 2). Body. All segments of approximately equal length. Normal proportions and shapes of coxae, with coxa 2 slightly overlapping coxa 1 and coxa 4 with excavate posterior margin. Head and pereon dorsally smooth, pleon with small teeth at each segment of both metasome and urosome, metasome segments 2 and 3 with one medium and one small tooth at each side of dorsal midline, segment 3 also with a very small roundish median tooth (Figure 2); urosome segments 1 and 2 each with two small teeth, segment 1 also with minute simple setae next to the tooth. Head (Figures 1B, 2). Slightly longer than pereonite 1, with small, rounded rostrum one-tenth of head length; lateral lobe rounded, with small notch ventrally; no apparent eye. Antenna 1 (Figure 3). Almost double length of antenna 2 (18: 10) and four-fifths of body length (rami not included); all articles of peduncle elongate, article 2 slightly longer than article 1, article 3 half length of article 2; flagellum 1.5 × length of peduncle, 18–30 articles, the most distal bearing few small and simple setae; accessory flagellum 0.7 × length of peduncle article 3, five-articulate, articles 1–4 equal length, fifth article very small, all bearing short simple setae. Antenna 2 (Figure 3). Peduncle articles 4 and 5 subequal in length, both bearing a few short simple setae, article 2 with gland cone ventrally; flagellum 12-articulate, subequal in length to peduncle articles 4+5, first article ...