Tetranycopsis hystriciformis Reck 1956

Tetranycopsis potentilla

This species is distinctive in that the first paired marginal setae of the hysterosoma are unequal in length; the other paired marginal setae are subequal in length. In T. horridus (Canestrini and Fanzago) all three sets are unequal in length.

FEMALE.—Rostrum short and broad; stylophore broad and slightly indented anteriorly; peritremes anastomosing and elongate distally. First pair of setae longer, but not as long as other dorsal body setae; third and fourth pair long, subequal in length to the dorsal setae of the hysterosoma. All dorsal body setae except humerals very long; humerals about two-thirds as long as L1 setae. All dorsal body setae serrate and set on prominent tubercles except for the first two pairs of propodosomals, which are set on much smaller protuberances. Body with few striae; with characteristic pores forming a definite pattern. All legs with some strong dorsal setae as figured. Length of body 548μ; including rostrum 612μ; leg I 478μ.

HOLOTYPE.—Female, USNM 3402, ex Potentilla argentea Linnaeus, Estey, Michigan, 13 July 1962.

PARATYPES.—Six females with the above data.

This genus belongs to the Hystrichonychini in having padlike claws and empodia. It is characterized by having three pairs of propodosomal setae and nine pairs of hysterosomal setae; all setae except the anterior propodosomals are set on prominent tubercles. Its nearest relative is probably Porcupinychus Anwarullah.

TYPE-SPECIES.—Mcgregorella incana, new species.