Ophiogomphus

Selys, 1854

snaketails

Ophiogomphus is a of in the , commonly known as snaketails. The genus contains approximately 25 described distributed across North America, Europe, and Asia. Most species exhibit green markings on -shaped , with males typically displaying more prominent coloration. The genus includes both widespread species and localized with restricted ranges.

Ophiogomphus susbehcha by (c) Kathy Richardson, some rights reserved (CC BY), uploaded by Kathy Richardson. Used under a CC-BY license.

Ophiogomphus severus by (c) Nick Block, some rights reserved (CC BY), uploaded by Nick Block. Used under a CC-BY license.

Pronunciation

How to pronounce Ophiogomphus: /ˌoʊfi.oʊˈɡɒmfəs/

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

Identification

Distinguished from other by combination of clubbed with green markings and specific patterns. Separated from Erpetogomphus by thoracic coloration and abdominal pattern details. Ophiogomphus arizonicus identifiable by nearly solid green . Ophiogomphus howei distinguished by small size and specific range. identification often requires examination of abdominal pattern, thoracic stripes, and male appendages.

Images

Appearance

-sized with distinctly clubbed . Most display green markings on the abdomen, often more vivid in males. Thoracic patterning varies by species; some exhibit solid green while others show striped or mottled patterns. are clear with typical . Body length varies among species, with Ophiogomphus howei being the smallest at approximately 25-30 mm.

Habitat

Primarily associated with flowing water systems including rivers, streams, and creeks. Many occupy clear, fast-flowing waters with rocky or gravelly substrates. Forested riparian zones are typical, though some occur in less pristine conditions. Ophiogomphus howei was historically considered restricted to relatively undisturbed forested streams, but a Michigan population persists in a more degraded river system with siltation and agricultural influence.

Distribution

Holarctic distribution. North occur across the continent from Canada through the United States to Mexico. European species include Ophiogomphus cecilia. Asian species extend the range eastward. Specific distributions vary by species: Ophiogomphus howei occurs in Appalachia, Wisconsin, and recently discovered Michigan; Ophiogomphus arizonicus in southwestern United States; Ophiogomphus severus in western North America.

Seasonality

seasons vary by and latitude. Ophiogomphus howei has a late spring flight season, with active in May and June. Most temperate species during summer months. Exact timing depends on local climate and elevation.

Diet

are aerial capturing small flying . are aquatic predators feeding on other aquatic in stream and river substrates.

Life Cycle

development with aquatic larval stage and terrestrial stage. laid in or near water. inhabit stream and river substrates, burrowing in sand, gravel, or debris. Larval development spans multiple years depending on and environmental conditions. occurs in spring to summer, with left on riparian vegetation.

Behavior

perch on rocks, vegetation, or other objects in or near water. Some regularly perch on objects in mid-stream. Males territories along stream reaches. Adults are strong fliers capable of sustained aerial pursuit of .

Ecological Role

and larval stages function as in aquatic and riparian . are significant predators in benthic stream . Adults contribute to aerial . Presence of certain may indicate water quality conditions, though specificity varies.

Human Relevance

Subject of citizen science and surveys. Ophiogomphus howei is listed as threatened in Michigan. used as indicators of stream health in some contexts. Attracts interest from enthusiasts and photographers.

Similar Taxa

ErpetogomphusAlso with green thoracic coloration; distinguished by specific abdominal pattern and male appendage structure
GomphusSimilar clubbed but typically with different color patterns, often and black rather than green
HageniusLarge with different abdominal shape and pattern; lacks green markings characteristic of Ophiogomphus

More Details

Conservation Status

Several have restricted ranges and are of concern. Ophiogomphus howei was considered rare with limited known until a 2017 discovery in Michigan expanded its known range. The Michigan population occurs in a river system with documented water quality issues, challenging assumptions about the species' requirements.

Taxonomic History

established by Selys in 1854. Contains both widespread Holarctic and localized . Species-level has been revised multiple times based on morphological and distributional studies.