Cryptanura sp. - Ichneumonid Wasp (Brullé, 1846)
Identified by Cesar of Insetologia. The subject portrayed is a male. Cryptanura are members of the order Hymenoptera, suborder Apocrita, where they are included in the group "Parasitica", superfamily Ichneumonoidea, family Ichneumonidae, subfmaily Cryptinae, tribe Cryptini and subtribe Mesostesina.
Cryptanura belongs to a complex mimetic ring involving at least two families of Hemipterans, katydids (Orthoptera: Ensifera), flies (Diptera) and cockroaches (Blattodea). All of these requires confirmation as to their participation in the mimetism involving Cryptanura wasps. Examples of Hemipterans visually inside this mimetic ring with Cryptanura are the Holymenia clavigera (which studies strongly suggest their participation in the mimetism) and Echthrus reluctator; the mimetism is also extended towards the behaviour despite the different ecology. They forage for hidden hosts through rapid sweeps on the floor with the antennae, a behaviour that is also noted on Holymenia clavigera and Echthrus reluctator which suggests that technique was identically assumed by the bug from the Ichenumonid. Such antennal movements are normally cues for predation, courtship or to demonstrate they are alert; none of which seems to be the case for Holymenia clavigera on the described cases, indicating that the bug spends energy moving its antennae exclusively as a mimetic technique to imitate the Ichneumonid. Most Cryptinae wasps are presumed to be external parasitoids of many hosts, including Lepidoptera. Informations on the larva-adult process will be appreciated and credited.
The mimetic hoverflies Sphecomyia vittata, Ceriana signifera, Tenthredomyia abbreviate and Spilomyia hamiifera hold their antennae in positions which suggest the geniculate antennae of wasps. Lymeon sp. also seems to be part of this mimetic ring. This requires scientific confirmation.
The tiny Lymeon wasps are similar-looking to Cryptanura; still lacks scientific confirmation.
Other possible insects that seem to be part of this complex mimetic ring but still require scientific confirmation:
Hyalymenus (Hyalymenus) vespiformis (Fabricius, 1803) - http://coreoidea.speciesfile.org/Common/basic/ShowImage.aspx?TaxonNameID=1186461&ImageID=197220
Blattodea - https://openi.nlm.nih.gov/imgs/512/147/4311699/PMC4311699_zookeys-475-037-g016.png
Longina abdominalis - http://www.insetologia.com.br/2015/10/mosca-neriidea-em-sao-paulo.html
Orthoptera: Ensifera - https://farm3.staticflickr.com/2860/11323662284_b01ed2e4a9_b.jpg
Other - https://bugguide.net/images/raw/FKD/RMQ/FKDRMQTR7Q3RSQH0QQ3RRQWRHQBRXQCRSQ3R0QYRIQQ060H0XQDR3KNRKQJRLQURLQARJKWRFKCRFK.jpg
Cushman's original description on morphology and general physical attributes of Cryptanura can be found here: https://repository.si.edu/bitstream/handle/10088/16445/USNMP-96_3193_1945.pdf?sequence=1&isAllowed=y
More pictures in Project Noah here: http://www.projectnoah.org/spottings/1426753276
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