Conocephalus strictus

(Scudder, 1875)

Straight-lanced Meadow Katydid

Conocephalus strictus, the straight-lanced meadow katydid, is a North American notable for the female's exceptionally long, straight ovipositor that exceeds body length. The exhibits wing dimorphism with short-winged (13–22 mm) and long-winged (21–30 mm) forms. appear in late summer and occur year-round in dry grasslands, old fields, and pastures where they form dense . Males produce a faint, pulsating purr at 10–20 kHz.

Conocephalus strictus (1) by Gawkinsk1. Used under a CC BY-SA 4.0 license.Straight-lanced Meadow Katydid - Conocephalus strictus, Mason Neck West Park, Mason Neck, Virginia by Judy Gallagher. Used under a CC BY 2.0 license.Straight-lanced Meadow Katydid - Conocephalus strictus, Merrimac Farm Wildlife Management Area, Aden, Virginia by Judy Gallagher. Used under a CC BY 2.0 license.

Pronunciation

How to pronounce Conocephalus strictus: /ˌkɒnoʊˈsɛfələs ˈstrɪktəs/

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Identification

Distinguished from co-occurring Conocephalus fasciatus and Orchelimum by the female's conspicuously longer, straight ovipositor. Males identified by that are tapered beyond the tooth and flattened distally, versus shorter, differently shaped cerci in similar species. Wing dimorphism (short vs. long tegmina) present but not diagnostic alone. Song a faint, pulsating purr at 10–20 kHz, softer than many .

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Appearance

Large and robust for the Conocephalus. Body length ranges 13–30 mm depending on wing form. Coloration green and brown. Tegmina (forewings) short relative to body. Two distinct morphs exist: short-winged form (13–22 mm) and long-winged form (21–30 mm). Males possess long tapered beyond the tooth, flattened in their final third, and capable of extreme body bending. Females have a straight, sword-like ovipositor that exceeds body length—the ' namesake feature.

Habitat

Dry grasslands, old fields with grasses, and open areas of short grass along roadsides and in pastures. Prefers clumped vegetation where individuals aggregate in large numbers. Not associated with wetlands or dense woody vegetation.

Distribution

North America: central Arizona to southern Montana and southern New York to southern Georgia in the United States; extends into parts of Mexico and Canada.

Seasonality

first appear in late summer; occur year-round in suitable .

Diet

Grasses, with a focus on grass seeds. powerful enough to crack seeds.

Life Cycle

Hemimetabolous development with , nymph, and stages. Eggs deposited using the elongated ovipositor, likely inserted into soil or vegetation. Nymphs resemble miniature adults without wings. Adults reach maturity in late summer.

Behavior

Forms dense or clumps of individuals. Males stridulate to produce -specific song for mate attraction. Both sexes capable of powerful jumping using enlarged hind legs. Males exhibit extreme body bending, possibly related to mating or signaling.

Ecological Role

Primary consumer converting grass to insect biomass; significant herbivore in grassland . Serves as prey for predatory including Sphex ichneumoneus (Great Golden Digger Wasp), which paralyzes katydids to provision nests. studies indicate meadow katydids can convert substantial portions of plant biomass (e.g., 16% of Juncus biomass in one study) and reduce seed production of grasses and rushes by 30–50%.

Human Relevance

Subject of ecological research on grassland herbivory and plant-insect interactions. Song audible to humans with good high-frequency hearing or recording equipment, contributing to soundscape of North American grasslands. No documented agricultural pest status or economic importance.

Similar Taxa

More Details

Wing dimorphism

Presence of both short-winged (brachypterous) and long-winged () forms within may reflect strategies or environmental plasticity.

Etymology

Specific epithet 'strictus' and 'straight-lanced' refer to the female's straight, sword-like ovipositor.

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Sources and further reading