Climaciella brunnea

(Say in Keating, 1824)

Wasp Mantidfly, Western Mantidfly, Brown Mantidfly, Brown Wasp Mantidfly

Climaciella brunnea is a predatory mantidfly in the Mantispidae, notable for its striking mimicry of paper wasps in the Polistes. possess forelegs convergently evolved with mantises, used to capture small insect prey. The exhibits regional color , matching locally abundant Polistes species. Its involves a highly specialized parasitic relationship with wolf spiders (Lycosidae): first-instar larvae use phoretic to board spiders, transfer between sexes during mating if necessary, and ultimately enter spider sacs to feed on the eggs. The species is widely distributed across North America from southern Canada to Nicaragua, with adults most commonly observed from May through October, peaking in June through August.

Climaciella brunnea by (c) Katja Schulz, some rights reserved (CC BY). Used under a CC-BY license.

Climaciella brunnea by (c) Steve Kerr, some rights reserved (CC BY), uploaded by Steve Kerr. Used under a CC-BY license.

Pronunciation

How to pronounce Climaciella brunnea: //klɪˌmæsiˈɛlə ˈbrʌninɛ//

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

Identification

Distinguished from true mantises (order Mantodea) by the presence of two pairs of similar-sized wings (Neuroptera) versus the leathery forewings (tegmina) of mantises, and by the straight versus mantis elbowed antennae. Separated from actual Polistes by straight rather than elbowed antennae, different wing venation, and the absence of a stinger. Differentiated from other mantispids by the wing posture (folded flat over back) and wasp-mimicking color pattern. The dark basal wing patches that simulate the longitudinal fold of vespid wings are particularly distinctive.

Images

Habitat

frequent forest clearings, edges, and open vegetation where they rest on foliage and flowers to ambush prey. Found in diverse including prairies, woodlands, and riparian areas. Larvae require habitats supporting of wolf spiders. of adults sometimes form at favorable sites, apparently in response to male-produced .

Distribution

Southern Canada (British Columbia, Alberta, Manitoba, Ontario, Quebec) through the United States (widespread, absent from Pacific coast states, Idaho, and Nevada) south to Nicaragua. Most abundant in central and eastern North America.

Seasonality

emerge from May through October, with peak abundance in June, July, and August. Regional variation occurs in timing. Males are short-lived, typically less than one week; females persist approximately one month.

Diet

are predatory, capturing small insects with their forelegs. Prey includes various small arthropods encountered on vegetation. Larvae feed exclusively on spider and, prior to entering egg sacs, on spider .

Host Associations

Lycosidae - First-instar larvae board wolf spiders and enter sacs to consume eggs. Known include Rabidosa rabida and Schizocosa .

Life Cycle

Females deposit in crescent-shaped clusters of hundreds to thousands on short filaments, typically on leaf undersides. Eggs hatch into campodeiform first-instar larvae that adopt an upright, swaying posture and use a caudal sucker to attach to substrates while awaiting passing spiders. Upon contacting a spider, the larva boards and remains until the spider reproduces, transferring to females if initially on males. The larva enters the egg sac before closure, feeds on eggs using specialized mouthparts, and pupates within the sac. Development from egg to requires at least one year.

Behavior

are ambush , waiting motionless on vegetation to seize passing prey. When disturbed, they display defensive enhancing mimicry: curling the beneath the body, raising it vertically, and swaying. Males produce that attract females and may cause at mating and feeding sites. Courtship involves repeated wing-spreading and foreleg extension lasting several minutes. Copulation may extend up to 24 hours, followed by deposition. Adults are primarily but occasionally active diurnally, and are attracted to lights.

Ecological Role

function as of small insects and may act as incidental when feeding on nectar at flowers. Larvae are specialized of wolf spider , potentially influencing spider . The contributes to complexity through its unique strategy.

Human Relevance

Occasionally encountered by entomologists and naturalists due to its striking appearance. Not economically significant. Sometimes mistaken for , which may lead to unnecessary concern. Attracted to blacklights and porch lights, facilitating observation and collection.

Similar Taxa

Polistes spp. (paper wasps)Convergent mimicry in coloration, body shape, and wing posture; distinguished by straight , different wing venation, and forelegs
Other MantispidaeC. brunnea uniquely exhibits -mimicking wing posture (folded over back) and color pattern; other mantispids typically hold wings roof-like and lack such pronounced mimicry
Mantodea (mantises)Convergent forelegs; distinguished by wing structure (two similar pairs in Neuroptera versus leathery forewings in Mantodea), shape, and overall body plan

More Details

Pupa description

The pupa was formally described for the first time in 2018 based on a specimen from central Mexico, representing a significant addition to knowledge of stages.

Regional morphological variation

in different geographic regions resemble locally Polistes ; for example, Gulf Coast populations resemble P. bellicosus more than P. fuscatus.

Aggregation behavior

frequently observed in rather than solitarily, with male-produced implicated in formation of these groups.