Genus Timonidia Ball & Hartzell, 1922

[Back to North American Dictyopharidae]

Family Dictyopharidae Spinola, 1839

Subfamily Orgeriinae Fieber, 1872

Tribe Orgeriini Fieber, 1872

Genus Timonidia Ball & Hartzell, 1922
Type species (in original combination):  Timonidia solitaria Ball & Hartzell, 1922.



Southwestern US.

Distribution of Timonidia from FLOW (4 Oct. 2018)

Recognized species

There are 2 species currently in the genus [genus and both species on Metcalf 1946: 226]:

Timonidia nodosa (Ball, 1937) – USA: AZ
Aridia nodosa Ball, 1937: 176.
Timonidia nodosa (Ball, 1937); comb. by Emeljanov 2006: 76.
Timonidia solitaria Ball & Hartzell, 1922: 151 – USA: CA

Economic Importance:


Plant associations:
  • Timonidia solitaria – Eriogonum fasciculatum Benth. (Eastern Mojave buckwheat, Polygonaceae)

Hosts from Ball & Hartzell (1922); plant names from USDA PLANTS or Tropicos.


Brachypterous, leaving several terga visible from above, tegulae hidden (all Orgeriinae); no callosity behind eye; head rounded or angulate, produced in front of eyes for distance less than 2/3 width of eyes. Vertex longer, apical cell of vertex (areolet) present, but poorly defined, oval, enclosed by swollen carinae; front without horizontal black band above frontoclypeal suture; tibiae not foliaceous.

Keys to genus of US Orgeriinae in Doering & Darby 1943 and Doering (1955: 196). Timonidia nodosa moved from Aridia by Emeljanov 2006.

Description of genus from Ball and Harzell 1922: 151.

Resembling Ticidia, but smaller with a larger and more sharply angled vertex and still wider front.
Cephalic process almost wanting. The apex of the vertex slightly exceeding the eyes. Vertex triangular clear to the base, median carina weak. Front broader than in Timodema, frontal tablet broad, scarcely elevated, parallel margined to just before the apex where the lateral cariuce round in and unite with the vertex. Clypeus broader than in Timodema. No callosity between the eye and pronotum. Pronotum short, without raised tablet, pustulate throughout. Central tablet of scutellum broadening posteriorly without pustules. Elytra brachypterous, irregularly reticulate. Abdomen oval, abruptly terminating posteriorly, almost truncate. Abdominal segments pustulate as in Ticidia. Fore and middle tibia and femora linear, not foliaceous or expanded. Hind tibia with 2-4 weak spines. Rostrum equaling the abdomen. Type of the genus Timonidia solitaria.

Timonidia_solitania_DOR-aligned Timonidia_solitania_FR-aligned

Timonidia solitaria (All photos by Rick Donovall or Kimberley Shropshire, Department of Entomology, University of Delaware)

Timonidia solitaria (All photos by Rick Donovall or Kimberley Shropshire, Department of Entomology, University of Delaware)

Online resources
Timonidia is not present on Bugguide (link to subfamily).
3I Interactive Keys and Taxonomic Database.
BOLD. (link to subfamily, genus not present)


Found by inspecting hosts.

Molecular resources: 

As of this writing (4 Oct. 2018), data for this genus is not available on Genbank or on Barcode of life.

Selected references:

Ball, E. D. 1909. Some remarkable new leaf-hoppers of the family Fulgoridae. Proceedings of the Biological Society of Washington 22: 197-204.

Ball, E. D. 1937. Some new Fulgoridae from Western United States. Bulletin of the Brooklyn Entomological Society 32: 171-183.

Ball, E. D. and Hartzell, A. 1922. A review of the desert leafhoppers of the Orgerini [sic] (Rhynchota Fulgoridae). Annals of the Entomological Society of America 15: 137-152.

Bartlett, C. R., L. B. O’Brien and S. W. Wilson. 2014. A review of the planthoppers (Hemiptera: Fulgoroidea) of the United States. Memoirs of the American Entomological Society 50: 1-287.

Doering, K. C. 1955. Some taxonomic and morphological studies of two genera of North American Dictyopharidae. University of Kansas Science Bulletin 37(7): 195-221.

Doering, K. C. 1956. The taxonomic value of the pretarsal structures in the classification of certain Fulgoroidea. University of Kansas Science Bulletin 37: 627-643. pdf [genus studied]

Doering, K. C. and H. H. Darby. 1943. A contribution to the taxonomy of the genus Orgerius in America, north of Mexico (Fulgoridae, Homoptera). Journal of the Kansas Entomological Society 16(2-3): 64-98.

Emeljanov, A. F. 1983. Dictyopharidae from the Cretaceous deposits on the Taymyr Peninsula (Insecta, Homoptera). Paleontologicheskii Zhurnal 3: 79-85 [In Russian; translated in: Paleontological Journal 17(3): 77-82].

Emeljanov, A. F. 2006. Taxonomic changes in American Ogeriinae (Homoptera; Dictyopharidae). Zoosystematica Rossica 15:73-76.

Melichar, L. 1912a. Monographie der Dictyophorinen (Homoptera). Abhandlungen der K. K. Zoologisch-botanischen Gesellschaft in Wien. 7 (1): 1-221. Plate(s): 1-5.  (P. 195)

Metcalf, Z. P. 1946. General Catalogue of the Homoptera. Fascicle IV Fulgoroidea. Part 8 Dictyopharidae. Smith College, Northhampton, Massachusetts.

Spinola, M. 1839a. Essai sur les Fulgorelles, sous-tribu de la tribu des Cicadaires, ordre des Rhyngotes. Annales de la Société Entomologique de France 8: 133-337.

Wilson, S. W., C. Mitter, R. F. Denno and M. R. Wilson. 1994. Evolutionary patterns of host plant use by delphacid planthoppers and their relatives. In: R. F. Denno and T. J. Perfect, (eds.). Planthoppers: Their Ecology and Management. Chapman and Hall, New York. Pp. 7-45 & Appendix.

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