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Colonies appear as DENSE WHITE COTTONY MASSES on the underside of leaves and along stems — looking like patches of cotton wool stuck to the plant. Heavy infestations cover entire plants in white wax.
Saint Helena giant earwig was the LARGEST EARWIG IN THE WORLD — 8 cm body length INCLUDING the dramatic forceps at the rear, with the largest specimens reaching 9-10 cm.
Now believed EXTINCT — LAST CONFIRMED SIGHTING in 1967. Multiple intensive surveys since (1988, 1995, 2003, 2014) failed to find any living individuals. Officially declared extinct by IUCN Red List in 2014.
Was endemic to the small remote SOUTH ATLANTIC ISLAND OF SAINT HELENA — 122 km² volcanic island ~1,950 km west of Africa, famous as the place where Napoleon Bonaparte was exiled.
Extinction caused by HABITAT DESTRUCTION (deforestation), PREDATION BY INTRODUCED RATS AND MICE, COMPETITION FROM INTRODUCED CENTIPEDES, and likely incidental pesticide exposure during 20th-century agricultural development.
One of the most-cited examples of INVASIVE-SPECIES-DRIVEN EXTINCTION of an island endemic arthropod — flagship case of invertebrate extinction in modern conservation biology curricula.
One of the LARGEST EARWIGS in North America — 3-4 cm body length INCLUDING the dramatic forceps at the rear (largest individuals up to 5 cm including cerci).
Major beneficial PREDATOR of agricultural pest insects — fall armyworm, corn earworm, other lepidopteran larvae in southern US row crops (cotton, soybean, corn).
Females construct underground brood chambers and AGGRESSIVELY GUARD AND CARE FOR EGGS AND HATCHLING NYMPHS for several weeks until they disperse — flagship example of arthropod parental care.
One of the few NA earwigs commonly active during DAYTIME — most NA earwigs are nocturnal, but striped earwigs hunt actively in daylight on bare ground and low vegetation.
Essentially COSMOPOLITAN — established in temperate and subtropical regions worldwide. Spread globally with human commerce, especially with shipped potted plants and nursery stock.
Patent leather beetles live in MULTI-GENERATIONAL FAMILY GROUPS inside decaying hardwood logs — one of the few NA insect species with adults and developing offspring living together cooperatively.
Adults provide complex PARENTAL CARE — PRE-PROCESS WOOD for larval consumption (mixing with intestinal microbes that break down lignin), construct and maintain complex burrow systems, defend the family group, and assist with pupation.
Adults produce AT LEAST 14 DOCUMENTED STRIDULATION CALLS for inter-individual communication — different calls signal alarm, mate-finding, territorial defense, parent-offspring interactions. Complex acoustic vocabulary.
One of the most important DECOMPOSERS of decaying hardwood logs across eastern NA forests — major contributor to forest nutrient cycling through the family-group wood-processing lifestyle.
Common name 'PATENT LEATHER beetle' refers to the SHINY JET-BLACK BODY that looks like polished black patent leather. Other names include bess bug, horned passalus, peg beetle.
Name comes from the major economic damage — feeding on cotton bolls leaves YELLOW-AND-RED STAINS in the cotton fibers from both direct feeding and bacterial pathogens transmitted during feeding.
Feeding TRANSMITS BACTERIAL PATHOGENS (especially Nematospora coryli yeasts) that grow inside the cotton boll and produce stains. Stained cotton fibers cannot be effectively bleached or dyed.
Bright RED-AND-YELLOW WARNING COLORATION is APOSEMATIC — adults are chemically defended through compounds sequestered from cotton seeds and other Malvaceae host plants.
Feeds primarily on plants in family MALVACEAE (the cotton family) — cotton (most economically important host), kapok, hibiscus, ornamental Malvaceae. Narrow host plant family restriction.
Flagship example of HETEROPTERAN TRUE BUG damage to cotton — distinct from the more familiar lepidopteran cotton damage tradition (corn earworm, pink bollworm). Insurmountable cotton boll feeding damage.
Different geographic populations display dramatically different elytra coloration — BRILLIANT METALLIC GREEN, BLUE, PURPLE, RED, COPPER, and combinations. Each regional variant looks like a completely different species.
Colors created by STRUCTURAL COLORATION — multiple microscopic layers in the elytral cuticle that scatter and interfere with incoming light. Different layer thicknesses in different geographic variants produce different perceived colors.
Flagship subject of modern studies of REGIONAL COLOR POLYMORPHISM and structural-color evolution in NA Coleoptera. Featured in essentially every modern textbook discussion of insect color polymorphism.
Found in SANDY AND BARE-GROUND HABITATS — sandhills, sand dunes, sand pits, sandy roadsides, and other open sandy areas. Often co-occurs with other Cicindela tiger beetle species in these habitats.
Like other Cicindela tiger beetles, sprints across sandy substrates so fast it goes TEMPORARILY BLIND during peak velocity — the visual processing system cannot keep up with incoming light during sprints.
Primary VECTOR of PIERCE'S DISEASE in California vineyards — transmits the bacterium Xylella fastidiosa as it feeds on grape vines. Threatens the entire $58 BILLION California wine and grape industry.
Same Xylella fastidiosa bacterium has KILLED MILLIONS OF ANCIENT OLIVE TREES in Italy since 2013 — some olives over 1000 years old destroyed by 'Olive Quick Decline Syndrome' in Puglia, southern Italy.
Native to southeastern US — INVADED CALIFORNIA in the late 1990s (first detected Tulare County 1989) via accidental introduction of infested ornamental nursery plants. Caused massive economic concern for CA wine industry.
Particularly EFFECTIVE VECTOR because of large body size (more xylem fluid per feeding), broad host range (hundreds of plant species), and prolific reproduction (multiple generations per year with high population density).
