Family Delphacidae

Subfamily Delphacinae

Tribe Delphacini

 

Type species (in original combination): Euidella basilinea Germar, 1821.

The genus Euidella was subsumed under Euides by Metcalf (1952).

Distribution: Widespread as currently defined; mostly Holarctic and Neotropics.

Recognized species (distribution information may be incomplete)

A total of 25 species are currently placed in the genus as follows:

New World

1 Euides afasciata (Caldwell, 1951) - Puerto Rico, St. Lucia

2 Euides altamazonica (Muir, 1926) - Ecuador

3 Euides belemensis (Muir, 1926) - Brazil

4 Euides blairmontensis (Muir, 1926) - Guiana

5 Euides brazilensis (Muir, 1926) - Brazil, Ecuador, St. Lucia

6 Euides elegans (Muir, 1926) - Ecuador
7 Euides equadorensis (Muir, 1926) - Ecuador
8 Euides fasciatella (Osborn, 1935) - Puerto Rico, Panama
9 Euides fucata (Berg, 1883) - Argentina
10 Euides fuscovittata (Scott, 1881) - Argentina, Paraguay
11 Euides grossa (Van Duzee, 1933) - Costa Rica
12 Euides guaduae (Muir, 1926) - Ecuador

13 Euides magnistyla (Crawford, 1914) - USA: Georgia; Puerto Rico, Cuba, Grenada, Mexico, St. Thomas, Turks & Caicos

14 Euides megalostylus (Muir, 1919): Guiana

15 Euides triloba (Metcalf, 1923) - USA: Louisiana, Florida; Bermuda, Bahamas (Cat, San Salvador)
16 Euides vanduzeei (Muir and Giffard, 1924) - USA: Florida, Louisiana, Mississippi
17 Euides weedi (Van Duzee, 1897) - USA: California, Florida, Georgia, Illinois, Kentucky, Missouri, Mississippi, Texas; Bermuda, Puerto Rico, Cuba, Mexico

Old World
1 Euides alpina (Wagner, 1948) - Austria, Poland, Russia, Kazakhstan, Kirghizia, Gagestan
2 Euides basilinea (Germar, 1821) - Turkey, Russia, Ukraine
3 Euides bilineata (Matsumura, 1935) - Japan (Hokkaido)
4 Euides caspiana (Dlabola, 1961) - Russia
5 Euides horvathi (Lallemand, 1925) - Central Africa
6 Euides kashmirensis (Muir, 1922) - India
7 Euides semifuscipennis (Muir, 1926) - South Africa
8 Euides speciosa (Boheman, 1830) - Widespread Europe, Russia, Turkey, Azerbaijan, Estonia, Kazakhstan, Russia, Ukraine; China

Bartlett and Deitz (2000) moved several species formerly in Pissonotus to Euides.

This genus is in need of revision.  It is not clear whether all of these species belong in Euides.  In the analysis of Urban et al, (2010), it was equivocal whether Euides was monophyletic.

Recorded hosts:

Euides speciosa, E alpina: Common reed (Phragmites).

Euides elegans, E. guaduae: Guadua (Poaceae: Bambuseae) (a bamboo).

Euides speciosa: Arundo donax (Giant Cane).

 

Economic Importance:  Probably limited.

 

Recognition

Old and New World species are doubtfully congeneric. Old World taxa have unbranched parameres and tend to have asymmetrical processes on segment 10, whereas New World taxa have branched parameres and processes on segment 10 are symmetrical or absent.  Old world taxa tend to have the median carinae of the frons forked below the fastigium (see photos below), but it is branched much closer to the fastigium in New World species.  The armature of the diaphragm is quite different between Old and New World forms.

New World

Among the North American species, Euides weedi tends to be most often encountered.  New World species tend to be larger species and most are uniformly light brown.  Tropical species can be distinctly large and bear dark markings on the wings (the wings of Euides weedi are clear).

Can be mistaken for Nilaparvata, but lack the teeth on the basitarsus.  Most New World species have complex, multiply branched parameres (Euides fasciatella is an exception, but this species is probably misplaced). 

New World Euides are quite similar to Pareuidella, and some species may need to be transferred to this genus.

Adults are frequent at lights.  Brachypters uncommon for most species, but are sometimes found in series sweeping.

Euides fasciatella

Euides magnistyla

 

Euides triloba

 

Euides weedi

Old World

Euides alpina

Euides speciosa

 

Molecular resources

At this time, neither Genbank or Bold have any molecular resources for this genus; however, Urban et al. (2010) sequence 4 genetic loci (18S rDNA, 28S rDNA, wingless, and cytochrome oxidase I) for Euides afasciata, Euides fasciatella, Euides magnistyla, Euides speciosa, and Euides weedi.

 

Selected references

Bartlett, C.R. and L. L. Deitz. 2000. Revision of the New World delphacid planthopper genus Pissonotus (Hemiptera: Fulgoroidea). Thomas Say Publications in Entomology: Monographs. 234 pp.

Caldwell, J.S. and L.F. Martorell. 1951 [dated1950]. Review of the Auchenorynchous [sic] Homoptera of Puerto Rico. Part II. The Fulgoroidea except Kinnaridae. Journal of Agriculture of the University of Puerto Rico 34(2): 133-269

Hansen, L. O. 2000. Euides speciosa (Boheman, 1845) (Homoptera, Delphacidae) in Norway. Norwegian Journal of Entomology 47(2): 148.

Mariani, R. and A.M.M. de Remes-Lenicov, A.M.M. 2001. The genus Euides in Argentina (Hemiptera: Fulgoromorpha: Delphacidae). Revista de la Sociedad Entomologica Argentina 60 (1-4): 89-92.

Metcalf, Z. P. 1952. New names in the Homoptera. Journal of the Washington Academy of Sciences 42(7): 226-231.

Muir, F.A.G. 1926b. Contributions to our knowledge of South American Fulgoroidea (Homoptera). Part I. The Family Delphacidae. Experiment Station of the Hawaiian Sugar Planters’ Association, Entomological Series, Bulletin 18:1-51, plates 1-5.

Muir, F.A.G. and Giffard, W. M. 1924a. Studies in North American Delphacidae. Bulletin of the Hawaiian Sugar Planters Association Division of Entomology 15: 1-53.