Chaetonotus (Primochaetus) acanthodes Stokes 1887

• Main Author: Kånneby, Tobias
• Format: Other/Unknown Material
• Language: unknown
• Published: 2013
• Subjects: Biodiversity; Taxonomy; Animalia; Gastrotricha; Chaetonotida; Chaetonotidae; Chaetonotus; Chaetonotus acanthodes; Abisko; Småland; Lapland
• Online Access: https://zenodo.org/record/5632035; https://doi.org/10.5281/zenodo.5632035

Chaetonotus (Primochaetus) acanthodes Stokes, 1887 (Fig. 16) Localities: Askö, Södermanland (N 58 º 49 ’ 23 ’’; E 17 º 38 ’ 32 ’’), May 14, 2009; Freshwater Rockpool among Sphagnum spp., Hållö, Bohuslän (N 58 º 20 ’ 03’’; E 11 º 12 ’ 50 ’’), July 14, 2009; Skaftö, Bohuslän (N 58 º 14 ’ 39 ’’; E 11 º 27 ’ 16 ’’), July 24, 2009; Artificial pond, Nybro, Småland (N 56 º 44 ’ 89 ’’; E 15 º 54 ’ 27 ’’), June 28, 2008; Ängelstorp, Småland (N 57 º 20 ’ 08’’; E 16 º 28 ’ 46 ’’), May 1, 2010; Lake with Sphagnum spp., Abisko, Lapland (N 68 º 21 ’ 19 ’’; E 18 º 49 ’ 21 ’’) July 6, 2010; Sphagnum spp. bog at highway E 10, Lapland (N 68 º 26 ’ 04’’; E 18 º 14 ’ 53 ’’), July 1, 2010. Material: 12 specimens. TL, 128–145 µm; FL, 15–20 µm; AL, 10–11 µm; PhL, 31–34 µm; MD, 6–8 µm; CW, 12–14 µm; TNC, 18–20; DC, 10–12; DR, 22–25; VLC, 6–8; HS, 2– 4 x 2–4 µm; NS, 2– 4 x 2–5 µm; DS, 6– 7 x 6–7 µm; HSp, 2–3 µm; NSp, 0–3 µm; DSp, 0–4 µm; Gsp, 10–14 µm; VC, 8–9; VR, ~ 25–30. Head truncated, weakly five-lobed with two pairs of short cephalic sensory ciliary tufts. Cephalion and pleurae developed. Hypostomium developed as a thin rectangular plate. Two pairs of dorsal sensory bristles, anterior pair sometimes absent. Anterior pair inserted at U 26 and posterior pair emerging from rounded double-keeled scales at U 77–80. Furca straight with adhesive tubes constituting half to 2 / 3 of the total furca length. Dorsal body surface covered with oval to circular, strongly overlapping keeled scales with or without simple spines. Spines occasionally completely absent from the neck region and the trunk region posterior to the girdle. The girdle is formed by 7–12 scales positioned approximately 2 / 3 down the length of the body and provided with thick simple spines. Two pairs of parafurcal spines, 10–16 µm in length, in the posterior end. Ventrolateral scales similar to the dorsal ones, but with longer spines especially developed in the girdle region. Ventral interciliary field covered by round to suboval scales with short simple spines; spines are ...