Hypotheses and possibilities of intervention in nematode chemoresponses.

A new species of Cryphodera Colbran, 1966, parasitic on wild rose (Rosa sp. L.), is described from Utah, USA. Cryphode~'a utahensis n. sp. most closely resembles C. podocarpi (Wouts, Iq73) Luc et al., 1978, but is distinct with respect to a number of characters including juveniles with a longer esophagus (206 versus 142 ~tm), shorter tail (47 versus 69 gin), and fimr rather than three incisures in the lateral field. Females of C. utahensis have a terminal protuberance which is more pr(mouuced than in other species. ~anning electron microscope observations of the lip region of males indicate a labial (li~ surrounded by six lip sectors. However, the remainder of the lip region is comprised of irregularly-shaped plates; similar patterns with hmgitudinal striae apparently characterize males throughout the genus. The lip pattern of juveniles of C. utahensis n. sp. includes an oval labial disc surrounded by six lip sectors; transverse striae extend the heigttt of the lip region without longitudinal striae. The type locality of C. utahensis coniirms a broader distribntion of the genus than was indicated for other species, which are limited to Australia (Queensland) and New Zealand.