Ceuthophilus guttulosus thomasi

Hubbell, 1936

Utah camel cricket

Ceuthophilus guttulosus thomasi is a of camel cricket in the Rhaphidophoridae. It is a native North American camel cricket belonging to the Ceuthophilus, which includes approximately 90 . The subspecies was described by Hubbell in 1936. Like other camel crickets, it is wingless, , and adapted to dark, damp environments. It is found in the eastern United States, with records from Indiana, Kentucky, North Carolina, New York, and Ohio.

Pronunciation

How to pronounce Ceuthophilus guttulosus thomasi: //ˌsjuːˈθɒfɪləs ˌɡʌtjʊˈloʊsəs ˈtɒməsaɪ//

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Identification

Distinguished from true crickets (Gryllidae) by the absence of wings and inability to produce sound. Distinguished from Asian camel crickets (Diestrammena spp.) by native status and subtle morphological differences; precise identification to level requires examination of genitalia and comparison with . The ovipositor of females is often mistaken for a stinger but is harmless. Differs from grasshoppers by longer , hump-backed profile, and lack of wings.

Appearance

are wingless with a hump-backed (camel-like) . Body length ranges from 9-35 mm depending on the . Exceptionally long exceed body length. Long, powerful hind legs enable jumping several feet when disturbed. Females possess a prominent, blade-like ovipositor protruding from the rear of the . The subspecific epithet 'thomasi' honors the entomologist C. Thomas, who described the related species Ceuthophilus utahensis.

Habitat

Dark, damp, cool environments including caves, cellars, mine shafts, old wells, basements, crawl spaces, and rodent burrows. Also found in tool sheds, damp wood piles, beneath debris such as boards, stones, bricks, logs, and leaf litter. Highly moisture-dependent; colonies are discouraged by dry conditions.

Distribution

Recorded from Indiana, Kentucky, North Carolina, New York, and Ohio. As a of Ceuthophilus guttulosus, its range is presumably within the broader distribution of the , which is centered in the eastern United States.

Seasonality

home invasions begin in late summer and early autumn. Activity is primarily throughout the year in suitable .

Diet

scavenger. Feeds on decaying organic matter including leaves, roots, fruits, mold, mildew, and fungi. Has been observed to damage paper products and occasionally fabrics. Captures and consumes other insects and , particularly injured or weakened individuals. In tool sheds, fecal remains stain wood and tools.

Life Cycle

Females use the blade-like ovipositor to insert in soil. Development includes egg, nymph, and stages. Nymphs enter homes early in the season and grow in size, becoming more apparent as they scavenge food. (voluntary leg detachment) has been observed as a escape mechanism; the leg may regenerate.

Behavior

; ventures from daytime shelters at night. Exhibits thigmotaxis, traveling with a shoulder near walls. Capable of jumping more than ten times body height. Not social in the sense of eusocial insects, but aggregates in large numbers under suitable cover. Enters homes through cracks in foundations, voids around basement windows, spaces beneath doors, and utility penetrations.

Ecological Role

Important scavenger of decaying organic matter and animal droppings in cave and forest . Serves as prey for various . Contributes to nutrient cycling in dark, damp .

Human Relevance

Occasional nuisance pest in basements, garages, and crawl spaces. Rarely causes property damage; may nibble stored fabrics and stain surfaces with fecal spots. Not dangerous to humans; cannot sting. Can be captured and relocated outdoors or used as fish . management achieved by reducing humidity and sealing entry points.

Similar Taxa

Ceuthophilus utahensisNamed by the same author (Thomas) and similar in preference; distinguished by specific morphological characters and geographic distribution.
Diestrammena asynamora (Greenhouse Stone Cricket) Asian camel cricket increasingly in eastern US homes; distinguished by introduced status and subtle morphological differences, though precise field identification is difficult.
Gryllus spp. (field crickets)True crickets possess wings and produce sound; camel crickets are wingless and silent.

Misconceptions

The female ovipositor is frequently mistaken for a stinger, but it is harmless and functions only for -laying. Despite spider-like appearance and jumping ability, camel crickets are not spiders or dangerous to humans.

More Details

Taxonomic note

The epithet 'thomasi' recognizes the contributions of entomologist C. Thomas, who described Ceuthophilus utahensis. The Ceuthophilus guttulosus was originally described by Scudder.

Research context

Studies of camel cricket invasions have focused primarily on the Diestrammena; native Ceuthophilus including C. guttulosus thomasi have received less attention in recent invasion literature.