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Zoomorphology

, Volume 134, Issue 4, pp 553–563 | Cite as

Trophic structure and function in the larva of predatory muscid flies (Diptera, Muscidae)

  • G. E. RotherayEmail author
  • G. Wilkinson
Original Paper

Abstract

Assessed multiple times over a 100-year period, yet poorly understood, we provide a new view of trophic structure and function in predatory muscid larvae based on Phaonia goberti (Mik) and Phaonia subventa (Harris) (Diptera, Muscidae). Trophic structure and function were investigated by morphological analysis, direct observation and filming. Larvae search for prey using a compartmentalised body. The rear compartment grips the substrate, while the middle one turns to the sides and the front one grabs prey. Two feeding mechanisms were recorded, sucking and lunging. Sucking occurs when the head is anchored inside the prey, and fluids are ingested using the pump in the head skeleton. Lunging is the head moving forwards and backwards, coordinated with lowering and raising of the mandibles during which fluids and tissue are gathered into the cup-shaped, oral cavity prior to sucking in. These mechanisms rely on prey being pierced, and this is achieved by a remarkable structural and functional partnership between the pseudocephalon, mandibles and accessory sclerites. The partnership involves tightening the integument of the prey between the oral bars and disengaging the mandible hooks to pierce it. Due to connections between the oral bars and pseudocephalon, the hooks do not extend from their sheaths except when piercing, an unusual feature in larvae of the Cyclorrhapha (Diptera).

Keywords

Mandible Head skeleton Accessory sclerites Prey capture Prey handling Paralysants 

Notes

Acknowledgments

We are grateful to Dave Horsfield for confirming the identity of reared adults and discussion of the results and to Richard Lyszkowski for discussions and for filming P. goberti. We also thank William Foster for the loan of a M. dolium puparium from the collections of the University Museum, Cambridge.

Supplementary material

Supplementary material 1 (MP4 4959 kb)

Supplementary material 2 (MP4 2318 kb)

Supplementary material 3 (MP4 8233 kb)

Supplementary material 4 (MP4 5629 kb)

Supplementary material 5 (MP4 2013 kb)

435_2015_284_MOESM6_ESM.docx (12 kb)
Supplementary material 6 (DOCX 11 kb)

References

  1. Courtney GW, Sinclair BJ, Meier R (2000) Morphology and terminology of Diptera larvae. In: Papp L, Darvas B (eds). Contribs. Manual Palaearctic Dipt (vol 1). Budapest: Science Herald, pp 85–161Google Scholar
  2. Dowding VM (1967) The function and ecological significance of the pharyngeal ridges occurring in the larvae of some cyclorrhaphous Diptera. Parasitol (Cam) 57:371–388CrossRefGoogle Scholar
  3. Ferrar P (1979) The immature stages of ding-breeding Muscoid flies in Australia, with notes on the species, and keys to larvae and puparia. Aust J Zool 73:1–106CrossRefGoogle Scholar
  4. Ferrar P (1987) A guide to the breeding habits and immature stages of Diptera Cyclorrhapha. Entomonograph 8:1–907Google Scholar
  5. Keilin D (1914) Les formes adaptives des larves des Anthomyides: les Anthomyides á larves carnivores. Bull Soc Ent Fr 1914:496–501Google Scholar
  6. Keilin D (1917) Recherches sur les Anthomyides a larves carnivores. Parasitol (Cam) 9:327–450Google Scholar
  7. Keilin D, Tate P (1930) On certain semi-carnivorous Anthomyid larvae. Parasitol (Cam.) 22:168–181CrossRefGoogle Scholar
  8. Kutty SN, Pont AC, Meier R, Pape T (2014) Complete tribal sampling reveals basal split in Muscidae (Diptera), confirms saprophagy as ancestral feeding mode, and reveals an evolutionary correlation between instar numbers and carnivory. Mol Phylo Evol 78:349–364CrossRefGoogle Scholar
  9. Lambkin C, Sinclair BJ, Pape T, Courtney GW, Skevington JH, Meier R, Yeates DK, Blagoderov V, Wiegmann BM (2013) The phylogenetic relationships among infraorders and superfamilies of Diptera based on morphological evidence. Syst Entomol 38:164–179CrossRefGoogle Scholar
  10. MacGowan I, Rotheray GE (2008) British Lonchaeidae (Diptera, Cyclorrhapha, Acalyptratae). Handbks Ident Br Insects 10(15):1–142Google Scholar
  11. Munro HK (1925) Bionomic notes with the descriptions of the early stages of some South African muscoid flies. South Afr J Nat Hist 5:49–61Google Scholar
  12. Roberts MJ (1971a) The structure of the mouthparts of some calypterate dipteran larvae in relation to their feeding habits. Acta Zool 52:171–188CrossRefGoogle Scholar
  13. Roberts MJ (1971b) On the locomotion of cyclorrhaphan maggots (Diptera). J Nat Hist 5:583–590CrossRefGoogle Scholar
  14. Rotheray GE (2014) Development sites, feeding modes and early stages of seven European Palloptera species (Diptera, Pallopteridae). Zootaxa 3900: 50–76. doi: 10.11646/zootaxa.3900.1.3
  15. Rotheray GE, Gilbert F (2008) Phylogenetic relationships and the larval head of the lower Cyclorrhapha (Diptera). Zool J Linn Soc 153:287–323CrossRefGoogle Scholar
  16. Rotheray GE, Lyszkowski R (2015) Diverse mechanisms of feeding and movement in Cyclorrhaphan larvae (Diptera). J Nat Hist. doi: 10.1080/00222933.2015.1010314 Google Scholar
  17. Rotheray GE, Zumbado M, Hancock EG, Thompson FC (2000) Remarkable aquatic predators in the genus Ocyptamus (Diptera, Syrphidae). Stud Dipterol 7:385–398Google Scholar
  18. Schremmar F (1956) Funktionsmorphologische Studien an Dipterenlarven. Verhandlungen Deut Zoo Gesellshaft 1956:301–305Google Scholar
  19. Skidmore P (1973) Notes on the biology of palaearctic Muscids (1). Entomologist 106:24–48Google Scholar
  20. Skidmore P (1985) The biology of the Muscidae of the world. Dr W. Junk Publishers, DordrechtGoogle Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 2015

Authors and Affiliations

  1. 1.National Museums ScotlandEdinburghUK
  2. 2.Scottish Natural HeritageAyrUK

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