Macrobiotus engbergi Stec & Tumanov & Kristensen 2020, sp. nov.

• Published in: Comparative Biochemistry and Physiology Part A: Molecular & Integrative Physiology
• Main Authors: Stec, Daniel, Tumanov, Denis V., Kristensen, Reinhardt Møbjerg
• Format: Other/Unknown Material
• Language: unknown
• Published: Zenodo 2020
• Subjects: Biodiversity; Taxonomy; Animalia; Tardigrada; Eutardigrada; Parachela; Macrobiotidae; Macrobiotus; Macrobiotus engbergi; Alluitsup Paa; Greenland; Qeqertarsuaq; Tundra
• Online Access: https://doi.org/10.5281/zenodo.3718299

Macrobiotus engbergi sp. nov. urn:lsid:zoobank.org:act: C592B357-37F6-4C92-B16A-C28EDB17A231 Figs 1–9 Etymology We take great pleasure in dedicating this new species to the friend of the third author, Lars Engberg Hansen, who is a teacher emeritus from Qeqertarsuaq and Alluitsup Paa in Greenland and is always happy to help with collecting samples of mosses and lichens for us. Material examined 112 animals (including 9 simplex) and 108 eggs. Specimens mounted on microscope slides in Hoyer’s medium (98 animals + 103 eggs), fixed on SEM stubs (10+ 5) and processed for DNA sequencing (4+ 0). Holotype GREENLAND • ♀; Alluitsup Paa; 60°28′1.5″N, 45°34′27.8″W; 25 m a.s.l.; mixed sample of moss and lichen collected from rock in arctic tundra; IZiBB, slide GL.052.22. Paratypes GREENLAND • 107 paratypes; same collection data as for holotype; IZiBB, slides GL.052.17 to 052.24, SEM stub 17.08 • 108 eggs; same collection data as for holotype; IZiBB, slides GL.052.09 to 052.16, SEM stub 17.08. Description Animals (measurements and statistics in Table 2) Body transparent in juveniles and whitish in adults, after fixation in Hoyer’s medium transparent (Fig. 1A). Eyes present, visible also in specimens mounted in Hoyer’s medium. Cuticle porous with two types of pores: large (up to 5.0 μm in diameter) lenticular pores of shape resembling paper wrapped candy, with transversal wrinkles in extremities distributed randomly on entire body cuticle and being the biggest on anterior and posterior dorsal region (Figs 1 B–C, 2); and small round cuticular pores (0.3–0.7 μm in diameter) scattered in between lenticular pores (Figs 1C, 2B). Patches of granulation on all legs present (Fig. 3). A patch of clearly visible granulation is present on the external surface of legs I–III (Fig. 3 A– B). A pulvinus present on internal surface of legs I–III, together with a faint cuticular fold covered with faint granulation and paired muscles attachments which are present just below claws (Fig. 3 C–D). Both structures are visible only if the legs are ...