Semivoltine
Guides
Brachystola magna
Plains Lubber Grasshopper, Western Lubber Grasshopper, Homesteader
Brachystola magna is one of the largest grasshoppers in North America, a flightless species inhabiting the Great Plains from the Canadian border to central Mexico. Adults reach 4–6 cm in length, with females substantially larger and heavier than males. The species exhibits a two-year life cycle, with eggs overwintering twice before hatching. Though primarily herbivorous, adults display notable omnivory including scavenging and predation on other insects. The species has historical scientific significance as the subject of Walter Sutton's pioneering work on reduction division and chromosome theory.
Ellipsoptera puritana
Puritan tiger beetle
Ellipsoptera puritana, the Puritan tiger beetle, is a federally threatened species endemic to a highly restricted range in the northeastern United States. Adults are medium-sized, fast-running predators with distinctive cream-white marginal markings on their elytra. The species occupies a narrow ecological niche: sandy beaches and riverbanks backed by eroding cliffs or bluffs, where larvae burrow into exposed sediment faces. Its two-year life cycle involves larval development in burrows followed by brief adult emergence in mid-summer. Habitat loss from shoreline development, dam construction, and bank stabilization has severely reduced populations, prompting intensive conservation efforts including captive rearing programs.
Flexamia huroni
Huron River Leafhopper
Flexamia huroni is a leafhopper species in the family Cicadellidae, described by Bess & Hamilton in 1999. It belongs to the genus Flexamia, a group of leafhoppers known for their specialized host plant associations with grasses. The species is named after the Huron River in Michigan, where it was first collected. Like other members of the genus, it likely exhibits strong ecological dependence on specific grass host plants.
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lobal-biodiversity-information-facilityesbiodiversity-image-portalspanish-collectionstype-specimenlichenantarcticabernensisliyellowstoneHylogomphus
clubtails
Hylogomphus is a genus of clubtail dragonflies (family Gomphidae) comprising six described species native to eastern North America. The genus was elevated from subgenus status within Gomphus in 2000, reflecting distinct morphological and phylogenetic characteristics. Species within this genus are associated with lotic freshwater habitats and exhibit conservative body plans typical of gomphid dragonflies.
Hylogomphus geminatus
Twin-striped Clubtail
Hylogomphus geminatus, commonly known as the Twin-striped Clubtail, is a dragonfly species in the family Gomphidae endemic to the southeastern United States. The species was transferred from genus Gomphus to Hylogomphus in 2017 when Hylogomphus was elevated from subgenus to full genus rank. It exhibits pronounced ecomorphological variation in body length across its limited geographic range, with significant differences observed between populations on either side of the Apalachicola River in Florida. The species is listed as Least Concern by IUCN, though it was previously assessed as Near Threatened in 2007.
Oberea tripunctata
dogwood twig borer
Oberea tripunctata, commonly known as the dogwood twig borer, is a species of longhorn beetle in the family Cerambycidae. Adults emerge in early June and feed on dogwood twigs, causing girdling damage. Females lay eggs singly on healthy twigs; larvae bore into twigs and overwinter in stems, with some individuals taking up to two years to complete development. The species is considered a minor pest of flowering dogwood and has been recorded from additional hosts including elm, azalea, viburnum, and various fruit trees.
Oreoneta
A genus of dwarf spiders (family Linyphiidae) established in 1894, comprising approximately 30 species distributed across cold-temperate and Arctic regions of the Northern Hemisphere. Most species inhabit high-latitude or high-altitude environments. The genus was revised extensively by Saaristo & Marusik in 2004, resulting in numerous new species descriptions.
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Peltoperla is a genus of stoneflies in the family Peltoperlidae, found in Appalachian headwater streams of eastern North America. Species in this genus have semivoltine life cycles, typically developing over two years with egg diapause periods of approximately six months. Nymphs are strongly associated with leaf pack habitats in small forested streams. The genus exhibits 'leaky' cohort dynamics, where some individuals complete development in one year while others take two years, resulting in overlapping generations and high gene flow among cohorts.
Peltoperlidae
roach-like stoneflies, roachflies
Peltoperlidae is a family of stoneflies comprising 11 genera and approximately 46 known species. Larvae are dorsoventrally flattened with expanded thoracic plates, giving them a distinctive roach-like appearance. The family exhibits semivoltine life cycles lasting one to two years, with adult emergence typically occurring from April through June. Members are classified as shredder-detritivores, playing a significant role in leaf litter decomposition in lotic systems.
Quesada gigas
Giant cicada, chichara grande, coyoyo, coyuyo, coffee cicada
Quesada gigas is a large cicada species native to North, Central, and South America, with the widest geographic range of any cicada in the Western Hemisphere. It is a significant agricultural pest, particularly of coffee (Coffea) in Brazil and paricá (Schizolobium parahyba var. amazonicum) in the Amazon region, where nymphal feeding on roots can cause substantial yield losses or tree mortality. The species exhibits low selectivity in oviposition site choice, with females documented laying eggs in dry branches of non-host plants such as Conyza spp. weeds, which cannot support complete nymphal development due to their annual life cycle.
Recurvaria
Recurvaria is a genus of small moths in the family Gelechiidae, established by Haworth in 1828. The genus contains approximately 40 described species distributed across the Holarctic region. Several species are economically significant as pests of coniferous trees and pistachio, with larvae that mine needles or feed internally within fruits. The genus exhibits diverse life history strategies, including univoltine and bivoltine cycles, with some species requiring two years to complete development.