Colladonus intricatus (Ball 1911a: 198 )

Basionym: Thamnotettix intricatus Ball, 1911
Published in: Ball, E.D. (1911a) Additions to the jassid fauna of North America (Homoptera). The Canadian Entomologist, 43, 197–204.

Description & Identification

Medium size, linear species. male 4.30—4.50 mm., female 4.50—4.80 mm. (Nielson, 1968)General colour yellow brown to brown. Crown yellow brown to brown, sometimes with brown markings at apex; pronotum light brown; elytra brown with ivory along commissure, veins yellow brown to ivory.(Nielson, 1968)Pygofer in lateral aspect about 1½ times as long as wide, ventral margin concave at middle, caudoventral margin produced posteriorly to broad convex lobe, dorsal margin with posterior part convex; pygofer spine straight, lanceolate, arising from apex of caudoventral lobe, projecting dorsally; caudodorsal and dorsal submarginal areas of pygofer with many long setae; aedeagus in lateral aspect with bifurcate process about one-half as long as aedeagal shaft, flat and broad at midlength, pointed apically; gonopore at about midlength of aedeagal shaft; style in dorsal aspect about 1½ times as long as connective; stylar shaft long, about three times as long as basal width, with sides parallel, apex truncate or nearly so; stylar spine apical, long, pointed apically, projecting laterally; female seventh sternum in ventral aspect about twice as wide as long, anterolateral margins parallel, posterolateral part curved slightly mesally, posterior margin uniformly convex on each side of median spatulate process; median emargination V-shaped, shallow, less than one-fourth length of segment; spatulate process about 1½ times as long as basal width, produced beyond posterior margin, with sides parallel, apex deeply bifid (Nielson, 1968)This species is similar in general habitus to rupinatus and can be separated by the convex caudal margin of the male pygofer. Further characterization and relationships of the genitalia were presented by Nielson (561). Severin (704) illustrated the adults in color. (Nielson 1968)

Biology & Ecology

The biology of the species is unknown. It was taken from monkeyfiower (Diplacus aurantiacus Jeps.) and bracken (Pteridium aquilinum var. lctnuginosum (Bong.) Fern.) by DeLong and Severin (196). Nielson (561) examined specimens from Ceanothus thy rsi/iorus Esch. and A’rctostaphlylos manzanita Parry, which had been collected by R. II. Beamer. Severin (704) reported adult longevity for two adults as 67 and 93 days, respectively, on celery. (Nielson, 1968)


(Ball 1911a: 198 )


Friscananus intricatus (Ball, 1911)
Thamnotettix intricatus Ball, 1911

Worldwide Distribution

It is known only from California. DeLong and Severin (196) recorded it from Montara, San Mateo County, and Nielson (561) reported it from San Francisco and Stinson Beach. (Nielson, 1968)

North America

Distribution point data provided by GBIF.

Vector Status

This species is a vector of the western strain of North American aster yellows virus. Under the name of 'Friseananus intricatus (Ball)” it was first reported as a vector of this virus by Severin (701, 703, 704). Transmission was effected from diseased celery to healthy celery in 9 of 37 plants tested. Natural infectivity was demonstrated and six celery plants were also infected after the insects fed on inoculum from 11 to 12 days.(Nielson 1968)This species is not considered at present to be an important vector of this virus in California.(Nielson 1968)

Plant Diseases


Athysanini Cicadellidae Colladonus Deltocephalinae Membracoidea North America

Colladonus intricatus (Ball 1911a: 198 ): Wilson M. R. & Turner J. A. 2021. Insect Vectors of Plant Disease. Amgueddfa Cymru - National Museum Wales. Available online at [ Accessed:  29/09/2023 ].
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