Spharagemon

Scudder, 1875

band-winged grasshoppers

Species Guides

9

Spharagemon is a of band-winged grasshoppers in the Acrididae, containing approximately 9–10 described distributed across North America. Members of this genus are characterized by their association with sandy or loose soil and their distinctive hindwing coloration patterns. The genus includes several well-studied species such as the mottled sand (S. collare) and Say's grasshopper (S. equale), which serve as important indicators of sand prairie .

Spharagemon equale by (c) Annika Lindqvist, some rights reserved (CC BY), uploaded by Annika Lindqvist. Used under a CC-BY license.Spharagemon crepitans by (c) Arturo Santos, some rights reserved (CC BY), uploaded by Arturo Santos. Used under a CC-BY license.Spharagemon bolli by (c) Gordon C. Snelling, some rights reserved (CC BY), uploaded by Gordon C. Snelling. Used under a CC-BY license.

Pronunciation

How to pronounce Spharagemon: //sfəˈræɡɨˌmɒn//

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Identification

in Spharagemon are distinguished from related band-winged grasshoppers by the combination of an elevated carina on the pronotum—often deeply incised or notched—and distinctive hindwing patterns typically featuring a colored disk (often yellow or orange) with dark transverse bands. The tegmina are usually speckled or mottled, and some species show coalesced spots forming faint bands. Hind tibiae are frequently brightly colored (orange to red). Nymphs share the elevated pronotal carina and spotted coloration, with instar-specific details of femoral banding and tibial coloration useful for identification.

Images

Habitat

Sandy soils with sparse vegetation, including sand prairies, sand dunes, sand blowouts, and sandy banks of lakes and streams. Some occupy sandy loam sites such as roadsides and field edges.

Distribution

North America, with records from Alabama, British Columbia, California, Connecticut, and Colorado; individual range from the Great Plains and Rocky Mountain regions to the Great Lakes and eastern North America.

Behavior

Members of this exhibit , spending active and quiescent periods on the ground surface. and nymphs typically rest horizontally on ground litter or bare soil, bask by orienting perpendicular to sunlight, and feed while positioned on the ground. Some are strong fliers with wings extending beyond the , capable of of 50–100 feet when flushed in favorable conditions. Males produce stridulatory sounds during courtship approaches.

Ecological Role

Primary consumers in sand prairie and sandy soil ; contribute to nutrient cycling and serve as prey for birds and other vertebrates. densities are typically low but can increase in disturbed sandy .

Human Relevance

Generally minor agricultural pests. The mottled sand (S. collare) occasionally reaches damaging densities in disturbed sandy areas, with potential to injure wheat and newly seeded crested wheatgrass. Most cause only minor forage damage due to naturally low densities.

Similar Taxa

  • TrimerotropisAlso band-winged grasshoppers with patterned hindwings, but Spharagemon typically have a more elevated and deeply notched pronotal carina.
  • MetatorShares sandy preferences and band-winged ; S. collare specifically noted to replace Metator pardalinus in loam to clay soils while S. equale occupies similar habitats.
  • Spharagemon equaleClosely related and syntopic with S. collare; distinguished by preference for loam to clay soils versus strict sandy soil association of S. collare.

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Sources and further reading