Cicindela tranquebarica parallelonota

Casey, 1914

Opal Tiger Beetle

Cicindela tranquebarica parallelonota is a of the oblique-lined , commonly known as the Opal Tiger Beetle. It belongs to the tiger beetle Cicindelinae within the . The exhibits spring-fall activity, with developing in burrows during summer months. Adults are known for their fast running speed and predatory habits, though specific distinguishing features of this subspecies relative to other C. tranquebarica subspecies require careful examination of elytral maculation patterns.

Pronunciation

How to pronounce Cicindela tranquebarica parallelonota: //ˌsɪsɪnˈdiːlə trænˌkwɛbəˈraɪkə pəˌrælɪloʊˈnoʊtə//

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Identification

Distinguished from other Cicindela tranquebarica by the more parallel orientation of elytral maculations, as indicated by the subspecies name "parallelonota." The nominate subspecies C. t. tranquebarica occurs further east and has different maculation patterns. C. t. kirbyi, found in the Great Plains and Rocky Mountain region, exhibits relatively broader maculations. Accurate identification to subspecies level requires examination of specimens and comparison of elytral pattern details; and geographic location provide supporting evidence.

Appearance

possess the characteristic : elongated body, large prominent , long slender legs adapted for rapid running, and enlarged sickle-shaped . The display the oblique-lined pattern typical of the , with maculations forming distinctive . As the epithet "parallelonota" suggests, this form is characterized by elytral markings with more parallel orientation. Body length averages 11-14 mm. The metallic coloration, when present, is structural rather than pigment-based.

Habitat

Inhabits open, sandy to clayey soils including beaches, dunes, barren paths through prairies, and dry alkaline creek . Shows for saline conditions but is not restricted to them. Occurs in both moist and dry soil situations, with frequently found in sparsely vegetated areas near grassland edges.

Distribution

Recorded from Canada and the United States in North America. Specific range within the broader distribution of C. tranquebarica requires further documentation; the spans much of North America with different occupying distinct geographic regions.

Seasonality

Spring-fall : active during spring and autumn months. Overwinter as adults in burrows, re-emerging in spring for mating and . Summer months spent primarily as and in soil burrows.

Diet

are active of small including and other . are ambush predators that seize passing near burrow entrances.

Life Cycle

with , (three ), , and stages. Larvae construct vertical burrows in soil, presenting flattened at entrance to ambush . Third instar larvae spend majority of development time in burrows, which become most noticeable. Adults emerge in fall as sexually individuals, burrow to overwinter, then re-emerge in spring for . requires at least one year, potentially extending to 2-3 years.

Behavior

are extremely fast runners that pursue visually, stopping periodically to refocus due to speed exceeding visual processing capacity. When disturbed, adults short distances and typically alight facing the threat to reduce visible profile. May seek under vegetation or elevate body on long legs to avoid overheating. maintain fixed orientation within burrows, tossing soil pellets to one side with movements during burrow maintenance.

Ecological Role

in open ; both and contribute to regulation of small . Larval burrows may influence soil structure and aeration in sandy and clayey substrates.

Human Relevance

Subject of entomological study and nature observation; are increasingly popular among naturalists. Potential for quality in open sandy and clayey environments vulnerable to development.

Similar Taxa

Cicindela tranquebarica tranquebaricaNominate occurring further east with different elytral maculation patterns, less parallel orientation of markings
Cicindela tranquebarica kirbyiGreat Plains/Rocky Mountain with relatively broader maculations, often found in more alkaline
Cicindela purpureaOverlaps in preference for clay soils; distinguished by different elytral pattern and body coloration
Cicindela repandaShares moist soil ; distinguished by different elytral maculation pattern and more shore-associated distribution

More Details

Nomenclatural note

The name "parallelonota" directly references the parallel nature of the elytral markings that distinguish this form.

Taxonomic context

were formerly placed in but are now treated as Cicindelinae within . This -level remains subject to ongoing study, with some authorities questioning the of subspecies designations in this group.