Kerygmachela kierkegaardi is a member of Sirius Passet fauna, and a species of the Cambrian lobopodians ^{1), 4)}.

The Sirius Passet Lagerstätte of north Greenland is the Lower Cambrian(515-518 Million years ago) fossil-rich sedimentary deposit which located on the northern margin of Laurentia, near the equartor, at palaeolatitude of around 15° S. The Sirius Passet Lagerstätte is older than the Burgess Shale ³⁾.

The head region of Kerygmachela is a rounded lobe-like shape with a pair of frontal appendages bearing long spinous processes ^{2), 4)}. A pair of sickle-shape eyes, interpreted as primitive compound eyes, is located under the frontal appendages, on the ventro-lateral position of head, and a mouth-opening is situated on the ventral region of anterior lobe, between a pair of the frontal appendages ⁴⁾.

Kerygmachela has eleven pairs of lobe-shaped lateral flaps with gills and lobopodous limbs, and has a single long tail spine ^{2), 4)}. The trunk and the tail are about 7 cm in length, total length of the body , including with the frontal appendages, will be approximately 20 cm (measured on Figure 1 of the reference 4).

Presumably, Kerygmachela had swum using the lateral-lobes. The frontal appendages are slightly curved inwards, then Kerygmachela might have grasped a prey using them like a forcep, or again, stirred up sediment and swept/scooped benthonic small animals and the organic detritus.