Kleptothule rasmusseni is a small, elongated trilobite, about 3 cm in length, and about 5 to 6 mm in width, from the Sirius PassetLagerstätte. It is currently placed in the familyNevadiidae, though this may change with further study.
Its cephalon is composed of at least five segments, and its elongated thorax is composed of 27+ segments. The 20 or so segments of the pygidium are poorly defined, as they are fused together.[1]
References
^Budd, Graham E. (1995). "Kleptothule rasmusseni gen . et sp. nov.: an ?olenellinid-like trilobite from the Sirius Passet fauna (Buen Formation, Lower Cambrian, North Greenland)". Transactions of the Royal Society of Edinburgh: Earth Sciences. 86 (1): 1–12. doi:10.1017/S0263593300002121.