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Lepidoptera genitalia

Lepidoptera genitalia. SWRS Lepidoptera Course, Aug. 2012 Chris Schmidt Canadian National Collection of Insects Ottawa, CAN. Tools for identification and taxonomy:. morphology (genitalia, antennae, other external) morphometrics DNA immature stages. Morphology.

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Lepidoptera genitalia

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  1. Lepidoptera genitalia SWRS Lepidoptera Course, Aug. 2012 Chris Schmidt Canadian National Collection of Insects Ottawa, CAN

  2. Tools for identification and taxonomy: morphology (genitalia, antennae, other external) morphometrics DNA immature stages

  3. Morphology - genitalia usually most important character, but numerous other character sets: Antennal morphology Immature stages Biological (eg. flight time, behaviour, host plant use, etc.)

  4. Morphometrics Morphology cannot always discriminate sibling species (i.e. overlap of characters between species): how to deal with species complexes? - Quantify multiple character sets and do statistical comparison – morphometrics eg. digitally analyze colour components of wing patterns

  5. Morphometrics e.g. spruce budworm complex: (Lumley & Sperling 2010 Syst. Ent.) - in this case, greater discriminant ability than DNA barcode

  6. Genitalic morphology: very important character set in Lepidoptera taxonomy. - genitalia structurally complex (so lots of characters) - relatively little within-species variation - high between-species variation Genitalic morphology

  7. History of genitalic morphology late 1800’s: JB Smith - snapped off the valves of noctuids eg. Smith & Dyar 1899: Acronycta revision early 1900s: Hampson - “Catalogue of the Lepidoptera Phalaenae” remains one of the most important works in “noctuidology” – but did not use genitalia (retired about 1912)

  8. ~1910: Pierce – “Genitalia of the British Lepidoptera” - also included female genitalia 1900-1920s: Barnes & McDunnough (“Contributions...”) - looked at and used genitalia, although not often illus. (later volumes); McD started at CNC in 1921, extensive dissections thereafter Pierce 1914

  9. 1950: DF Hardwick - techniques paper the first to describe genitalic dissection and inflating vesicae: “Preparation of slide mounts of Lepidopterous genitalia” (Canadian Entomologist 82:231-235) 1958: first illustrations of inflated vesicae (in Schinia)

  10. Study of genitalic morphology now essential standard for species-level taxonomy and inferring phylogentic relationships

  11. male genitalia

  12. lateral (side) view caudal (end) view

  13. uncus tegumen valva

  14. uncus tegumen valva phallus (aedeaegus) vesica (inside phallus)

  15. uncus tegumen valva phallus (aedeaegus)

  16. uncus tegumen valva phallus (aedeaegus) vesica Basic male genitalia structure

  17. Extend genital capsule from integument

  18. Separate capsule from abdominal pelt by gently tearing around perimeter of tegumen

  19. Lab exercise – dissect your very own moth: are you up for the Matigramma challenge?

  20. Preparing female genitalia • prepartion is very simple since structures are mounted essentially ‘as is’; ie little manipulation needed • most important to be familiar with position and location of structures

  21. female genitalia

  22. Papillae anales Ductus bursae Corpus bursae

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