Chaetonotus (Chaetonotus) microchaetus Preobrajenskaja 1926

• Main Author: Kånneby, Tobias
• Format: Other/Unknown Material
• Language: unknown
• Published: 2013
• Subjects: Biodiversity; Taxonomy; Animalia; Gastrotricha; Chaetonotida; Chaetonotidae; Chaetonotus; Chaetonotus microchaetus; Abisko; Lapland
• Online Access: https://zenodo.org/record/5632009; https://doi.org/10.5281/zenodo.5632009

Chaetonotus (Chaetonotus) microchaetus Preobrajenskaja, 1926 (Fig. 6) Synonyms: Chaetonotus balsaminus Schwank, 1990 [syn: Kisielewski 1997] Localities: Small pond, Askö, Södermanland (N 58 º 49 ’ 23 ’’; E 17 º 38 ’ 32 ’’), May 14, 2009; Sphagnum rock pool, Skarvesäter, Bohuslän, Sweden (N 58 º 14 ’ 23 ’’; E 11 º 22 ’ 08’’), July 16, 2009; Freshwater rockpool, Östra Båtskäret, Stockholm archipelago (N 59 º 44 ’ 35 ’’; E 19 º 19 ’ 11 ’’), September 18, 2007; Runmarö, Stockholm archipelago (N 59 º 17 ’ 22 ’’; E 18 º 47 ’ 56 ’’), May 14, 2010; Small stream, Abisko Tourist Station, Abisko (N 68 º 21 ’ 23 ’’; E 18 º 47 ’ 59 ’’), July 3, 2010; Wet meadow, Abisko Scientific Research Station, Lapland (N 68 º 21 ’ 18 ’’; E 18 º 48 ’ 40 ’’), July 4, 2010; Sphagnum spp. bog at highway E 10, Lapland (N 68 º 26 ’ 04’’; E 18 º 14 ’ 53 ’’), July 1, 2010. Material: 15 specimens. TL, 171–241 µm; FL, 25–29 µm; AL, 15–19 µm; PhL, 54–60 µm; MD, 6–9 µm; CW, 14–18 µm; TNC, 29–35; DC, 17–24; DR, 33–36; VLC, 8–12; HS, 3 x 3 µm; NS, 3– 4 x 3 µm; DS, 6– 8 x 4–5 µm; HSp, 2–3 µm; NSp, 2–3 µm; DSp, 3–6 µm; VC, 3–5; VR, ~ 30–40; VTS, 15– 17 x 6–8 µm. Head clearly five-lobed with two pairs of cephalic sensory ciliary tufts. Cephalion present. Epi- and hypopleurae well developed. Hypostomium developed as a shield-shaped plate with two teeth. Two pairs of dorsal sensory bristles, anterior pair inserted in posterior neck region at U 23–26 and posterior pair emerging from rounded triangular double-keeled scales at U 79–83. Furca straight. Adhesive tubes pointing slightly outwards and constituting approximately 3 / 5 of the total furca length. Dorsal body surface covered by three-lobed scales with more or less rounded anterior edges. Scales with short rather thick simple spines which increase in length toward the posterior end. Scales and spine distribution follows the lateral body outline, only the median columns are more or less straight. Anterior to the furcal base an area with smaller scales with shorter spines. Two to three pairs of longer ...