Stylochaeta scirtetica Brunson, 1950

(Fig. 2)

Syn. Stylochaeta curviseta Krivanek & Krivanek, 1959

Localities: Ponds near Waterloo and in the Puslinch district.

Material: 8 specimens.

Krivanek & Krivanek (1959) hypothesized that Stylochaeta scirtetica could be identical to Stylochaeta curviseta, which they described from Louisiana, USA. Morphology now makes clear that S. curviseta is a synonym of S. scirtetica . Both the Canadian specimens and the specimens found in Hesse, Germany bear the special scutiform spines in front of the first bundle of thick movable spines (“Springstacheln”). These structures were first described for S. curviseta and later also confirmed in S. scirtetica by Brunson in his correspondence with Krivanek and Krivanek. The same spines are also present in specimens of S. scirtetica collected in Sweden by Kånneby (2012) (Fig. 2). S. scirtetica is common in shallow habitats with Lemna spp. but also appears among the stems of Phragmites australis and among water lilies.