Species Account

USNM; Male; 'Comstock Tex.'; Date: 4-1-36

USNM; Male; 'Comstock Tex.'; Date: 4-1-36

USNM; Male; 'Comstock Tex.'; Date: 4-1-36

USNM; Male; 'Comstock Tex.'; Date: 4-1-36
NMW Image No. i14267

Texananus pergradus DeLong 1938e: 185

Membracoidea : Cicadellidae
Diseases Transmitted

Distribution Map
(simplified continental distribution)
Geographical Distribution:
North America

Recorded Distribution(s):
The most recent information indicates that this species occurs in the Southwestern United States. DeLong and Severin in 1945 (192) recorded it from Oregon, California, Utah, Colora¬do, Arizona, New Mexico, Texas, and Mexico; but Crowder in (149) in his 1952 examination of material reported a more limited dis¬tribution in Texas, New Mexico, Arizona, and California. (Nielson, 1968)

Texananus pergradus DeLong 1938e: 185
Diseases Transmitted Pathogen Type
Crops Affected by Texananus pergradus DeLong 1938e: 185
Rice Citrus Carrot
Barley Apple Tomato
Maize (Corn) Pear Potato
Sugarcane Elm Strawberry
Wheat Palms Rubus
Sorghum Grapevine Papaya
Other (grasses/cereals) Ornamentals Peach

This species is a vector of the western strain of North American aster yellows virus. Severin (696) was first to report it as a vector of this virus in 1945 by demonstrating transmission from diseased celery to 7 of 248 healthy celery and 1 of 110 healthy aster plants.
(Nielson 1968)

This species is not considered an important vector in the natural spread of this virus owing to a low percentage of transmission and inability to live and breed on celery plants.
(Nielson 1968)

Identification Plates
Texananus pergradus

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Plate 1
Species Description

Small, robust species. male 4.00—4.60 mm., female 4.30—5.00 mm.

General color light tan to light brown. Crowii and pronotum light tan, suffused with light-brown reticulations; elytra light tan to ivory with numerous brown reticulations.

Pygofer in lateral aspect about as long as wide, caudal margin broadly convex; aedeagus in lateral aspect curved, tubelike, serrate on dorsal margin and notched at apex; gonopore terminal; connective with single apical process extending caudad; style in dorsal aspect simple, apices broad; female seventh sternum in ventral aspect with caudal margin sinuate and narrowly notched at middle.

Species Diagnosis

From latipex, to which it is similar in genital characteristics, pergradus can be separated by the serrate dorsal margin of the aedeagal shaft in lateral aspect. The genitalia of this species are illustrated by DeLong and Severin (1945) . Severin (1945) presented colored illustrations of the adults.

(Nielson 1968)


Host Plant Activity Period (Months) Dormancy Generations
- -
Eggs -
Nymphs -
Adult -
One per year -
Continuous -
Variable -
Texananus pergradus DeLong 1938e: 185

Higher taxonomy

Kingdom Phylum Class Order Superfamily Family
Animalia Arthropoda Insecta Hemiptera
Suborder: Auchenorrhyncha
Infraorder: Cicadamorpha
Membracoidea Cicadellidae
Subfamily: Deltocephalinae
Texananus pergradus DeLong 1938e: 185
Nielson, M. W. 1968b. The leafhopper vectors of phytopathogenic viruses (Homoptera, Cicadellidae). Taxonomy, biology and virus transmission. United States Department of Agriculture Technical Bulletin . 1382 386 pp.
Record last updated - 12/09/2019