Petrichus athleticus Mello-Leitão, 1944 was described from Punta Piedras, Argentina, based on male and female specimens. The species was originally wrongly assigned to Petrichus Simon, 1886 because it has the cephalic region more elevated than the carapace region. However, examination of the holotype has revealed the presence of lateral eye tubercles, and legs I and II longer and stouter than legs III and IV. These characteristics are considered synapomorphic for the Thomisidae. Furthermore, the presence of an epigynal hood (type "hood pocket"), RTA long with simple base and modified apex, absence of tutaculum, and short setae on the surface of the carapace and abdomen corroborate that P. athleticus belongs to Misumenoides F.O.P.-Cambridge, 1900. In this paper, we assign P. athleticus to Misumenoides, redescribe the species, illustrate it for the first time, and extend its known distribution.

Testudinaria Taczanowski, 1879 includes nine valid species; only four of these species have both sexes described. In this paper we describe the female of T. gravatai Levi, 2005, which can be recognized specially by the abdominal pattern of spots. Testudinaria gravatai Levi, 2005 is similar to T. quadripunctata Taczanowski, 1879, but can be distinguished from that species by the presence of a single median excavation on the upper margin of the epigynal atrium; by copulatory duct almost straight in the basal portion and narrower in the distal portion. We have based our description on a single available female, collected in Criciúma, Santa Catarina, Brazil, a new locality record for the species.