Dissosteira

Scudder, 1876

Species Guides

4

Dissosteira is a of bandwinged grasshoppers in the Acrididae, containing four recognized distributed across North America. Members are medium to large in size, typically 1 to 1.5 inches in length, with slender bodies and distinctive wing patterns. The genus is characterized by a high pronotal crest deeply cut by one . The most widely known species is Dissosteira carolina, the Carolina , noted for its black hindwings with yellow margins and its habit of flying over bare ground.

Dissosteira carolina by (c) Mark Apgar, some rights reserved (CC BY), uploaded by Mark Apgar. Used under a CC-BY license.Dissosteira carolina by (c) Healthy Yards, some rights reserved (CC BY), uploaded by Healthy Yards. Used under a CC-BY license.Dissosteira spurcata by no rights reserved, uploaded by Steve Wells. Used under a CC0 license.

Pronunciation

How to pronounce Dissosteira: //ˌdɪs.oʊsˈtaɪ.rə//

These audio files are automatically generated. While they are not always 100% accurate, they are a good starting point.

Identification

The combination of large size, slender build, high pronotal crest cut by one , and bold hindwing coloration distinguishes Dissosteira from similar . The Carolina (D. carolina) is readily identified by black hindwings with pale yellow margins and its characteristic hovering over bare ground. D. pictipennis has rose-colored hindwings. The pronotal crest structure separates Dissosteira from Trimerotropis and other Oedipodinae with different crest . Nymphs identified by pronotal shape, facial slope, and hindleg color patterns.

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Habitat

Open grasslands, prairies, and disturbed including roadsides, railway cuttings, field margins, fence rows, and blowouts. Prefers areas with interspersed bare ground and vegetation. Often abundant in weedy grasslands and reseeded rangeland. Some occupy specific zones: D. longipennis in high plains, D. pictipennis in California grasslands.

Distribution

North America, with ranging across the United States and southern Canada. D. carolina is the most widespread, occurring across the continent. D. longipennis occupies the High Plains. D. pictipennis is restricted to California. D. spurcata occurs in western states including California and Wyoming.

Seasonality

exhibit varying seasonal cycles. D. carolina is an intermediate-hatching species with appearing May–July depending on latitude and altitude. D. pictipennis and D. spurcata are early-hatching species with nymphs emerging mid-spring. D. longipennis hatches in late spring. Adults present from early summer through autumn; oviposition occurs late summer to early fall.

Diet

, feeding on both grasses and forbs. Diet composition varies with availability. Observed consuming smooth brome, western wheatgrass, wheat, barley, kochia, Russian thistle, dandelion, and native grasses. Also feeds on ground litter and dry plant material. Selects young green leaves over old yellowing foliage.

Life Cycle

One-year () with as in soil pods. Egg pods large, curved, containing 30–70 eggs deposited 1.5 inches deep in compact bare ground. Nymphal development requires 26–55 days depending on temperature and altitude. Five nymphal instars. disperse by after wing maturation. Females require extended period (up to 9 weeks) for sexual maturation before oviposition.

Behavior

Strong, adept fliers. Males perform distinctive hovering 3–6 feet above ground for 8–15 seconds, producing soft sibilant sounds, possibly for courtship. frequently fly over bare ground, becoming highly conspicuous. Ground-dwelling, basking on bare soil with side perpendicular to sun and hindleg lowered. Escapes by lateral flight at right angles to approach path, exploiting sudden color change from dark wings to cryptic body upon landing. Communicates via visual and acoustic signals—seven visual and seven visual-acoustic signals documented in D. carolina.

Ecological Role

Herbivore in grassland ; contributes to nutrient cycling through consumption and . Minor pest of rangeland; may irrupt and disperse to damage crops. Serves as prey for birds, rodents, and insect .

Human Relevance

Minor agricultural pest. D. carolina occasionally damages rangeland grasses, wheat, alfalfa, tobacco, corn, sorghum, cotton, and beans during . Notorious for hovering over dirt roads, creating nuisance and visibility hazard. Attracted to lights at night. Subject of behavioral research on escape strategies and communication.

Similar Taxa

  • TrimerotropisBoth in Oedipodinae with banded wings, but Trimerotropis has different pronotal crest structure (not deeply cut by single ) and different wing patterns.
  • ArphiaSimilar large bandwinged grasshoppers with colorful hindwings, but Arphia typically have different pronotal and produce loud in rather than hovering display.
  • SpharagemonBandwinged grasshoppers of similar size, but Spharagemon have different pronotal crest structure and hindwing color patterns (typically yellow or orange bands rather than solid black or rose).

More Details

Taxonomic History

established by Scudder in 1876. Type Dissosteira carolina originally described by Linnaeus in 1758 as Gryllus carolina, later transferred to Dissosteira.

Research Significance

D. carolina has been extensively studied as a model for insect escape , risk assessment, and visual-. Research demonstrates that risk assessment and escape decisions in this visually oriented insect parallel those of vertebrates.

Nymphal Identification

Nymphs identified by: (1) with nearly vertical, small triangular lateral foveolae; (2) pronotum with carina strongly elevated and cut once; (3) hind with distinctive color pattern on inner surface—fuscous basal half with two pale yellow transverse bands distally; (4) general body color tan, brown, or gray.

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