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Metopiinae

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Metopiinae
Exochus prosopius

Exochus prosopius

System
Class: Insects (Insecta)
Order: Hymenoptera
Submission: Waist wasps (Apocrita)
Partial Order: Legimmen (Terebrantia)
Family: Ichneumon wasps (Ichneumonidae)
Subfamily: Metopiinae
Scientific name
Metopiinae
Forester, 1869

Metopiinae is a medium-sized subfamily of ichneumon flies. It has a worldwide distribution, with more than 850 known species and 28 genera (plus 5 new ones not yet described).[1] In Germany, 90 species in 14 genera have been recorded.[2][3]

Morphology

Habitus verschiedener Schlupfwespen der Unterfamilie Metopiinae

Habitus of various Metopiinae.
A. Colpotrochia diabella (W)
B. Colpotrochia beluga (W)
C. Cubus validus (M)
D. Exochus ravetus (W)
E. Trieces horisme
(dimension bar = 1 mm).

Metopiinae can be small or large, with forewing length ranging from 3 to 11 mm.[4] Some species of the genera Metopius and Colpotrochia can reach 2 cm in length and have a conspicuous warning coloration.[5]

Characteristic is the mostly clearly convex face, whereby the clypeus is not separated from the face by a furrow. Between the antennae is a small elevation. The wasps have a stout, cylindrical body and strong legs. The pronotum is concave laterally and rounded posteriorly. The ovipositor is short and barely projects beyond the end of the abdomen. The thigh ring (trochanter) and femur of the forelegs and midlegs are often connected.[1][6][7]

Lifestyle

Triclistus pallipes

Metopiinae are endoparasitic parasitoids that primarily infest butterflies. The hosts can move further before they are killed. Usually, free-living caterpillars are stung, or caterpillars that live in leaf rolls. The wasps then hatch from the butterfly pupae by cutting open the front end of the pupa like a lid.[3]

Some species, for example the small species of the genus Exochus and the large brightly coloured species of the North American genus Colpotrochia produce a penetrating odour when caught, which is probably a defensive behaviour.[5][6]

System

The Metopiinae are monophyletic, belonging to the Ophioniformes family. According to a recent study, they are the sister group of the Tryphoninae, Mesochorinae and Ctenopelmatinae.[1]

There are some genera that are not monophyletic. Whether the genera Bremiella, Ischyrocnemis and Lapton are rightly placed in this subfamily is not clear.[1]

The two genera Exochus and Metopius (nearly 60 species) are distributed worldwide, and species-rich. More than 290 species of Exochus have been described and many more in the Neotropics await description.[1]

Native genera

Genera that have been recorded in Germany. Number of species in Germany in parentheses.[2]

  • Apolophus (1)
  • Carria (1)
  • Chorinaeus (11)
  • Colpotrochia (1)
  • Drepanoctonus (1)
  • Exochus (37)
  • Hypsicera (3)
  • Chyrocnemis (1)
  • Lapton (1)
  • Metopius (13)
  • Periope (3)
  • Spudaeus (1)
  • Triclistus (14)
  • Tieces (2)

Web links

Individual references

  1. a b c d e Mabel Alvarado Gutierrez: Phylogeny of the wasp subfamily Metopiinae and patterns of speciation in the Exochus albiceps species-group. 31.August 2018 (ku.edu[accessed 26 February 2021]).
  2. a b K. Horstmann: Ichneumonidae. In: H. Dathe, A. Taeger, S. M. Blank (eds.): Verzeichnis der Hautflügler Deutschlands (Entomofauna Germanica 4), Ent. Nachr. Ber. Vol. 7, 2001, pp. 69-103.
  3. a b K. Schmidt, F. Zmudzinski, M. Riedel: Contributions to the knowledge of the Baden ichneumonid wasp fauna (Hymenoptera, Ichneumonide). 8. Metopiinae, Tersilochinae and nine other subfamilies. In: carolinea. Vol. 68. karlsruhe 2010, pp. 61-78.
  4. H. Goulet & J. T. Huber: Hymenoptera of the World: an identification guide to families. Ottawa, Ontario 1993, ISBN 0-660-14933-8, p. 437.
  5. a b A. Amiri, A. Talebi, M. Riedel, E. Rakhshani, H. Hajiqanbar:A survey of Metopiinae (Hymenoptera: Ichneumonidae) in southern Iran, with three new records.2015, retrieved 26 February 2021 (English).
  6. a b G. R. Broad, M. R. Shaw, M. G. Fitton: Ichneumonid Wasps (Hymenoptera: Ichneumonidae): their Classification and Biology. In: Handbooks for the Identification of British Insects. Vol. 7, No. 12. Royal Entomological Society, London, 2018, ISBN 978-1-910159-02-6, pp. 228-235 .
  7. Mabel Alvarado, Luis Figueroa: New country records of the Metopiinae (Hymenoptera: Ichneumonidae) in the Neotropical region. In: Entomological Communications. Vol. 1, 11 December 2019, ISSN 2675-1305, pp.ec01010-ec01010 , doi:10.37486/2675-1305.ec01010 [accessed February 26, 2021](entomologicalcommunications.org ).