Virtual dissections through micro-CT scanning: a method for non-destructive genitalia ‘dissections’ of valuable Lepidoptera material
Corresponding Author
THOMAS J. SIMONSEN
Department of Life Sciences, Natural History Museum, London, U.K.
Correspondence: Thomas J. Simonsen, Department of Life Sciences, Natural History Museum, Cromwell Road, London SW7 5BD, U.K. E-mail: [email protected]Search for more papers by this authorIAN J. KITCHING
Department of Life Sciences, Natural History Museum, London, U.K.
Search for more papers by this authorCorresponding Author
THOMAS J. SIMONSEN
Department of Life Sciences, Natural History Museum, London, U.K.
Correspondence: Thomas J. Simonsen, Department of Life Sciences, Natural History Museum, Cromwell Road, London SW7 5BD, U.K. E-mail: [email protected]Search for more papers by this authorIAN J. KITCHING
Department of Life Sciences, Natural History Museum, London, U.K.
Search for more papers by this authorAbstract
Since its first application to the field more than 10 years ago, micro-computed tomography (micro-CT) has been a state-of-the-art technology in the study of insect morphology and anatomy. Despite showing great potential for various types of non-destructive ‘dissections’, the method has, however, seen very limited use in descriptive taxonomy. Here we describe a method for carrying out virtual dissections of the genitalia in male Lepidoptera based on case studies involving the butterfly Argynnis paphia and the hawkmoth Cephonodes hylas. We demonstrate how a standard micro-CT scanner in conjunction with freely available software can distinguish and illustrate taxonomically important characters, and propose a workflow by which valuable material (such as Linnaean types) can be made available as digital loans, and how users can subsequently carry out ‘virtual dissections’. We emphasize that micro-CT scanning does not remove the need for real dissections and morphological expertise to confidently evaluate virtual ‘dissections’.
Supporting Information
Filename | Description |
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syen12067-sup-0001-FileS1.pdfPDF document, 3.6 MB | File S1. Screenshots of Drishti and SPIERS reconstruction procedures. |
syen12067-sup-0002-FileS2.pdfPDF document, 3 MB | File S2. Male and female genitalia of Cephonodes hylas hylas. |
Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.
References
- Abel, R.L., Xuan, V.B., Cotton, R. et al. (2010) Fluid flow in and around the olfactory organ of a hammerhead shark. Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology, 155, 464–475.
- Akkari, N., Cheung, D.K.-B., Enghoff, H. & Stoev, P. (2013) Revolving SEM images visualising 3D taxonomic characters: application to six species of the millipede genus Ommatoiulus Latzel, 1884, with description of seven new species and an interactive key to the Tunisian members of the genus (Diplopoda, Julida, Julidae). ZooKeys, 328, 5–45.
- Beutel, R.G., Ge, S.Q. & Hörnschemeyer, T. (2008) On the head morphology of Tetraphalerus, the phylogeny of Archostemata and the basal branching events in Coleoptera. Cladistics, 24, 270–298.
- Beutel, R.G., Friedrich, F. & Aspöck, U. (2010) The larval head of Nevrorthidae and the phylogeny of Neuroptera (Insecta). Zoological Journal of the Linnean Society, 158, 533–562.
- Cadiou, J.-M. (1998) Three new day-flying Sphingidae from Sulawesi (Lepidoptera). Lambillionea, 98 (Suppl. 1), 1–6.
- Cheung, D.K.B., Brunke, A.J., Akkari, N., Souza, C.M. & Pape, T. (2013) Rotational Scanning Electron Micrographs (rSEM): a novel and accessible tool to visualize and communicate complex morphology. ZooKeys, 328, 47–57.
- Dinley, J., Hawkins, L., Paterson, G., Ball, A.D., Sinclair, I., Sinnett-Jones, P. & Lanham, S. (2010) Micro-computed X-ray tomography: a new non-destructive method of assessing sectional, fly-through and 3D imaging of a soft-bodied marine worm. Journal of Microscopy, 238, 123–133.
- Djernæs, M. (2011) Structure and phylogenetic significance of the sternum V glands in Trichoptera. Zootaxa, 2284, 1–60.
- Djernæs, M. (2013) The sternum V glands in Lepidoptera. Acta Zoologica, 94, 19–34.
- Djernæs, M. & Kristensen, N.P. (2011) Derived morphology in a basal moth: the uniquely specialized sternum V glands of Agathiphaga (Lepidoptera: Agathiphagidae). Arthropod Structure & Development, 40, 559–569.
- Dos Passos, C.F. & Grey, L.P. (1945) A genitalic survey of the Argynninae (Lepidoptera: Nymphalidae). American Museum Novitiates, 1296, 1–29.
- Faulwetter, S., Vasileiadou, A., Kouratoras, M., Dailianis, T. & Arvanitidis, C. (2013) Micro-computed tomography: introducing new dimensions to taxonomy. ZooKeys, 263, 1–45.
- Friedrich, F. & Beutel, R.G. (2008) Micro-computer tomography and a renaissance of insect morphology. Proceedings of SPIE, 7048, 1–6.
- Friedrich, F. & Beutel, R.G. (2010) Goodbye Halteria? The thoracic morphology of Endopterygota (Insecta) and its phylogenetic implications. Cladistics, 26, 579–612.
- Friedrich, F., Matsumura, Y., Pohl, H., Bai, M., Hörnschemeyer, T. & Beutel, R.G. (2014) Insect morphology in the age of phylogenomics: innovative techniques and its future role in systematics. Entomological Science, 17, 1–24.
- Garwood, R.J. & Sutton, M.D. (2010) X-ray micro-tomography of Carboniferous stem-Dictyoptera: new insights into early insects. Biology Letters, 6, 699–702.
- Hebert, P.D.N., Cywinska, A., Ball, S.L. & DeWaard, J.R. (2003) Biological identifications through DNA barcodes. Proceedings of the Royal Society of London, Series B: Biological Sciences, 270, 313–321.
- Higgins, L.G. (1975) The Classification of European Butterflies. Collins, London.
- Holynski, R.B. (2010) Taxonomy and the mediocrity of DNA barcoding – Some remarks on Packer et al. 2009: DNA barcoding and the mediocrity of morphology. Arthropod Systematics & Phylogeny, 68, 143–150.
- Hörnschemeyer, T., Beutel, R.G. & Pasop, F. (2002) Head structures of Priacma serrata LeConte (Coleoptera, Archostemata) inferred from X-ray tomography. Journal of Morphology, 252, 298–314.
- Huetteroth, W., el Jundi, B., el Jundi, S. & Schachtner, J. (2010) 3D-reconstructions and virtual 4D-visualization to study metamorphic brain development in the sphinx moth Manduca sexta. Frontiers in Systems Neuroscience, 4, 15.
- Hünefeld, F. & Kristensen, N.P. (2010) The female postabdomen and internal genitalia of the basal moth genus Agathiphaga (Insecta: Lepidoptera: Agathiphagidae): morphology and phylogenetic implications. Zoological Journal of the Linnean Society, 159, 905–920.
- Kitching, I.J. & Cadiou, J.-M. (2000) Hawkmoths of the World. An Annotated and Illustrated Revisionary Checklist (Lepidoptera: Sphingidae). Cornell University Press, Ithaca, New York and The Natural History Museum, London.
10.1093/aesa/93.5.1195g Google Scholar
- Kuznetzov, V.I. & Stekolnikov, A.A. (2001) New Approaches to the System of Lepidoptera of World Fauna (on the Basis of the Functional Morphology of Abdomen). Russian Academy of Sciences/ Nauka, St. Petersburg [in Russian].
- Kvist, S. (2013) Barcoding in the dark?: a critical view of the sufficiency of zoological DNA barcoding databases and a plea for broader integration of taxonomic knowledge. Molecular Phylogenetics and Evolution, 69, 39–45.
- Lak, M., Fleck, G., Azar, D. et al. (2009) Phase contrast X-ray synchrotron microtomography and the oldest damselflies in amber (Odonata: Zygoptera: Hemiphlebiidae). Zoological Journal of the Linnean Society, 156, 913–923.
- Lee, S., Brown, R.L. & Monroe, W. (2009) Use of confocal laser scanning microscopy in systematics of insects with a comparison of fluorescence from different stains. Systematic Entomology, 34, 10–14.
- Limaye, A. (2006) Drishti—volume exploration software and presentation tool. Poster Presentation, Vis 2006. Baltimore, Maryland [WWW document]. URL http://code.google.com/p/Drishti-2 [accessed on 11 September 2013].
- Lowe, T., Garwood, R.J., Simonsen, T.J., Bradley, R.S. & Withers, P.J. (2013) Metamorphosis revealed: time-lapse three-dimensional imaging inside a living chrysalis. Journal of the Royal Society Interface, 10, 6.
- Michalik, P. & Ramirez, M.J. (2013) First description of the male of Thaida chepu Platnick, 1987 (Araneae, Austrochilidae) with micro-computed tomography of the palpal organ. ZooKeys, 352, 117–125.
- Pohl, H., Wipfler, B., Grimaldi, D., Beckmann, F. & Beutel, R.G. (2010) Reconstructing the anatomy of the 42-million-year-old fossil †Mengea tertiaria (Insecta, Strepsiptera). Naturwissenschaften, 97, 855–859.
- Ribi, W., Senden, T.J., Sakellariou, A., Limaye, A. & Zhang, S. (2008) Imaging honey bee brain anatomy with micro-X-ray-computed tomography. Journal of Neuroscience Methods, 171, 93–97.
- Richards, C.S., Simonsen, T.J., Abel, R.L., Hall, M.J.R., Schywn, D.A. & Wicklein, M. (2012) Virtual forensic entomology: improving estimates of minimum post-mortem interval with 3D micro-computed tomography. Forensic Science International, 220, 251–264.
- Rothschild, L.W. & Jordan, K. (1903) A revision of the lepidopterous family Sphingidae. Novitates Zoologicae, 9 (Suppl.), i–cxxxv + 1–972.
- Santos, L.M. & Faria, L.R.R. (2011) The taxonomy's new clothes: a little more about the DNA-based taxonomy. Zootaxa, 3025, 66–68.
- Shirôzu, T. & Saigusa, T. (1973) A generic classification of the genus Argynnis and its allied genera (Lepidoptera: Nymphalidae). Sieboldia, 4, 99–114.
- Simonsen, T.J. (2005) Boloria phylogeny (Lepidoptera: Nymphalidae): tentatively reconstructed on the basis of male and female genitalic morphology. Systematic Entomology, 30, 653–665.
- Simonsen, T.J. (2006a) Glands, muscles and genitalia. Morphological and phylogenetic implications of histological characters in the male genitalia of Fritillary butterflies (Lepidoptera: Nymphalidae: Argynnini). Zoologica Scripta, 35, 231–241.
- Simonsen, T.J. (2006b) The male genitalia segments in fritillary butterflies: comparative morphology with special reference to the “rectal plate” in Issoria (Lepidoptera: Nymphalidae). European Journal of Entomology, 103, 425–432.
- Simonsen, T.J. (2006c) Fritillary phylogeny, classification, and larval host plants: reconstructed mainly on the basis of male and female genitalic morphology (Lepidoptera: Nymphalidae: Argynnini). Biological Journal of the Linnean Society, 89, 627–673.
- Simonsen, T.J. & Roe, A.D. (2009) Phylogenetic utility and comparative morphology of the composite scale brushes in male phycitine moths (Lepidoptera, Pyralidae). Zoologischer Anzeiger, 248, 119–136.
- Simonsen, T., Wahlberg, N., Brower, A.V.Z. & de Jong, R. (2006) Morphology, molecules and fritillaries: approaching a stable phylogeny for Argynnini (Lepidoptera: Nymphalidae). Insect Systematics & Evolution, 37, 405–418.
- Soriano, C., Archer, M., Azar, D. et al. (2010) Synchrotron X-ray imaging of inclusions in amber. Comptes Rendus Palevol, 9, 361–368.
- Stoev, P., Komerički, A., Akkari, N. et al. (2013) Eupolybothrus cavernicolus Komerički & Stoev sp. n. (Chilopoda: Lithobiomorpha: Lithobiidae): the first eukaryotic species description combining transcriptomic, DNA barcoding and micro-CT imaging data. Biodiversity Data Journal, 1, e1013.
- Sutton, M.D. (2008) Tomographic techniques for the study of exceptionally preserved fossils. Proceedings of the Royal Society, Series B: Biological Sciences, 275, 1587–1593.
- Sutton, M. & Garwood, R. (2009) SPIERS 2.07. Freeware available from the authors at: http://www.spiers-software.org [accessed on 18 February 2011].
- Sutton, M.D., Garwood, R.J., Siveter David, J. & Siveter Derek, J. (2012) SPIERS and VAXML; A software toolkit for tomographic visualisation and a format for virtual specimen interchange. Palaeontologia Electronica, 15, 5T.
- Sutton, M. D., Rahman, I. & Garwood, R. J. (2014) Techniques of Virtual Palaeontology. Wiley-Blackwell, Oxford, U.K.
- Tautz, D., Arctander, P., Minelli, A., Thomas, R.H. & Vogler, A.P. (2003) A plea for DNA taxonomy. Trends in Ecology & Evolution, 18, 70–74.
- Vegliante, F. (2005) Larval head anatomy of Heterogynis penella (Zygaenoidea, Heterogynidae), and a general discussion of caterpillar head structure (Insecta, Lepidoptera). Acta Zoologica, 86, 167–194.
- Vegliante, F. & Hasenfuss, I. (2012) Morphology and diversity of exocrine glands in lepidopteran larvae. Annual Review of Entomology, 57, 187–204.
- Warren, B.C.S. (1944) Review of the classification of the Argynnidi: with a systematic revision of the genus Boloria (Lepidoptera; Nymphalidae). Transactions of the Royal Entomological Society of London, 94, 1–101.
10.1111/j.1365-2311.1944.tb01213.x Google Scholar
- Will, K.W. & Rubinoff, D. (2004) Myth of the molecule: DNA barcodes for species cannot replace morphology for identification and classification. Cladistics, 20, 47–55.
- Wipfler, B., Courtney, G.W., Craig, D.A. & Beutel, R.G. (2012) First µCT-based 3D reconstruction of a dipteran larva—the head morphology of Protanyderus (Tanyderidae) and its phylogenetic implications. Journal of Morphology, 273, 968–980.
- Wojcieszek, J.M., Austin, P., Harvey, M.S. & Simmons, L.W. (2012) Micro-CT scanning provides insight into the functional morphology of millipede genitalia. Journal of Zoology, 287, 91–95.
- Zwick, A. (2009) The principal structure of male genital sclerites and muscles of bombycoid moths, with special reference to Anthelidae (Lepidoptera: Bombycoidea). Arthropod Structure & Development, 38, 147–161.