Chaetonotus (Primochaetus) cf. cordiformis Greuter, 1917

Schwank, Peter & Kånneby, Tobias, 2014, Contribution to the freshwater gastrotrich fauna of wetland areas of southwestern Ontario (Canada) with redescriptions of seven species and a check-list for North America, Zootaxa 3811 (4), pp. 463-490 : 482

Chaetonotus (Primochaetus) cf. cordiformis Greuter, 1917

Localities. A pond near Erbsville, Waterloo district.

Material. 1 specimen.

Large species with a squat body, as in Chaetonotus (Primochaetus) heideri Brehm, 1917 and C. (P.) cordiformis , 150–200 µm in total body length. The head is overlapped by the head spines as in C. (P.) heideri . The proximal parts of the furcal branches are reduced. Adhesive tubes are very thin and constitute 4/5 of the total furca length. The total number of scales is low, only 6–8 dorsal columns each with 12–13 rounded scales. The spines extend out almost perpendicular to the body surface and are simple in comparison to the dentate spines of C. (P.) heideri and C. (P.) cordiformis . The spines are much longer in the trunk region than in the head region. The posteriormost spines are as long as the furcal branches but do not overshoot them.