Tenuibiotus voronkovi Tumanov 2007

• Main Authors: Zawierucha, Krzysztof, Kolicka, Małgorzata, Kaczmarek, Łukasz
• Format: Other/Unknown Material
• Language: unknown
• Published: 2016
• Subjects: Biodiversity; Taxonomy; Animalia; Tardigrada; Eutardigrada; Parachela; Macrobiotidae; Tenuibiotus; Tenuibiotus voronkovi; Nordaustlandet; Edgeøya; Arctic; Kongsfjord*; Kongsfjorden; Spitsbergen
• Online Access: https://zenodo.org/record/5631772; https://doi.org/10.5281/zenodo.5631772

Tenuibiotus voronkovi (Tumanov, 2007) (Figs. 1–18, Tables 1–3) Macrobiotus voronkovi in Tumanov (2007) Material examined: Type material: Paratype from Spitsbergen, Kongsfjorden (1 adult, 1 egg). Additional material: Spitsbergen: 1 specimen, 1 egg, Nordaustlandet: 23 specimens and 51 eggs, Edgeøya: 22 specimens and 18 eggs. Description: Adults. Body transparent or light yellow in living specimens and transparent after fixation in Hoyer’s medium (Figs 1–2). Faint granulation visible on leg I–III and obvious granulation present on legs IV (Figs 7–8). Dorsal and ventral cuticle without gibbosities, papillae, spines or sculpturing. Bucco–pharyngeal apparatus of the Macrobiotus type (Figs 3–6), with ventral lamina and poorly visible peribuccal lamellae. Mouth antero–ventral. First and second row of teeth in the oral cavity armature, absent (or not visible under PCM). Third row of teeth composed dorsally of “three transverse ridges (medial ridge arched with the convexity turned backwards and very thin lateral ridges” (Fig. 3) and ventrally of a “single medial ridge arched with the convexity turned backwards and a pair of lateral ridges fragmented into granules” Tumanov (2007) (Fig. 4). Pharyngeal bulb with apophyses, two rod–shaped macroplacoids and a triangular microplacoid. Macroplacoid length sequence 2<1. The first macroplacoid with a central constriction (Figs 3, 5). Claws of the Tenuibiotus type (Figs 7–8). Primary branches with distinct accessory points (Figs 7–8). Lunules under claws on legs I–III smooth and dentate on legs IV (Figs 7–8). Other cuticular structures on legs absent. Eggs. Spherical and ornamented, with conical processes. Processes have blunt or attenuate apices with reticulation. Egg shell between processes with poorly visible short irregular ridges. Complementary description. Eyes are present in some individuals preserved on the slides. Claws on leg IV of the Tenuibiotus type (Figs 7–8). Primary branches of claw IV with distinct accessory points (Fig. 7). Less clear constriction is present ...