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Issue: Vol. 5613 No. 3: 28 Mar. 2025
Type: Article
Published: 2025-03-28
DOI: 10.11646/zootaxa.5613.3.7
Abstract views: 80
PDF downloaded: 2

External morphology of the larva and polytene chromosomes of Thalassomya paraskevae Makarchenko, Semenchenko, Palatov & Lisanovskaya, 2024 (Diptera, Chironomidae: Telmatogetoninae) from the Bulgarian Black Sea Coast

Institute of Biodiversity and Ecosystem Research; Bulgarian Academy of Sciences; 1 Tzar Osvoboditel b.;1000 Sofia; Bulgaria.
Diptera Chironomidae Thalassomya paraskevae Varna Bulgaria larva morphological description polytene chromosomes

Abstract

The important larval structures of the chironomid Thalassomya paraskevae Makarchenko, Semenchenko, Palatov & Lisanovskaya, 2024, are described from specimens collected from the Bulgarian Black Sea coast town of Varna. The mandible, premandible, mentum, maxilla, antenna, clypeus and frontal apotome are described in detail. A diagnosis of the larval stage of the species is presented and compared with the closely related species Thalassomya frauenfeldi Schiner. The diploid chromosome set of T. paraskevae is 2n = 6 + B, as determined from an examination of the salivary gland chromosomes. The B chromosome was found in every individual but not in every cell. The B chromosome looks like a ‘heteropycnotic’ body, which in some cells has a loose structure. A characterization of the polytene chromosomes is presented, and are compared with samples from an earlier study. Low chromosomal polymorphism and two heterozygous inversions were found and the reason for this is discussed.

 

References

  1. De Bisthoven, L.J., Gerhardt, A. & Soares, A.M. (2005) Chironomidae larvae as bioindicators of an acid mine drainage in Portugal. Hydrobiologia, 532, 181–191. https://doi.org/10.1007/s10750-004-1387-z
  2. Ilyinskaya, N. & Petrova, N. (1985) B Chromosomes of Chironomus plumosus (Diptera, Chironomidae). Genetika, 21, 1671–1679. [in Russian]
  3. King, M. (1993) Evolution, the role of chromosome change. Great Britain at the University Press, Cambridge, 336 pp.
  4. Makarchenko, E., Semenchenko, A., Palatov, D. & Lisanovskaya, E. (2024) Morphological description and DNA barcoding of Thalassomya paraskevae sp. nov. (Diptera: Chironomidae: Telmatogetoninae) from coast of the Black Sea. Zootaxa, 5501 (4), 524–530. https://doi.org/10.11646/zootaxa.5501.4.2.
  5. Michailova, P. (1976) An additional B chromosome in Thalassomya frauenfeldi Schiner (Chironomidae, Diptera) from Bulgaria’s Black Sea coast. Doklady bolgarskoi akademii nauk, 29 (2), 267–269.
  6. Michailova, P. (1989) The polytene chromosomes and their significance to the systematics of the family Diptera. Acta Zoologica Fennica, 186, 1–107.
  7. Michailova, P. Ilkova, J., Kerr, R. & White, K. (2009) Chromosome variability in Chironomus acidophilus Keyl from the Afon Goach, UK, a river subject to long term metal pollution. Aquatic insects, 31 (3), 213–225. https://doi.org/10.1080/01650420903113711
  8. Michailova, P. & Mettinen, A. (2000) Cytotaxonomical variability of Chironomus plumosus L. and Chironomus anthracinus Zett. (Diptera, Chironomidae) from industrial and municipal polluted areas of Finland. Caryologia, 53 (1), 69–81. https://doi.org/10.1080/00087114.2000.10589183
  9. Michailova, P., Petrova, P., Ramella, L., Sella, G., Todorova, J. & Zelano, V. (1996) Cytogenetic characteristics of Chironomus riparius Meigen, 1804 (Diptera, Chironomidae) from a polluted Po River station. Genetica, 98, 161–178. https://doi.org/10.1007/BF00121364
  10. Michailova, P., Sella, G. & Petrova, N. (2012) Chironomids (Diptera) and their salivary gland chromosomes as indicators of trace metal genotoxicology. Italian Journal of Zoology, 79, 218–230. https://doi.org/10.1080/11250003.2011.622084
  11. Petrova, N. (2024) Brief review of Chironomidae and Simuliidae (Diptera) B chromosomes. Euroasian Entomological Journal, 23 (4), 209–214. [in Russian] https://doi.org/10.15298/euroasentj.23.04.04
  12. Sæther, O.A. (1980) Glossary of chironomid morphology terminology (Diptera: Chironomidae). Entomologica Scandinavica Supplement, 14, 1–51.
  13. Tasdemir, A. (2012) Thalassomya frauenfeldi Schiner, 1856 (Chironomidae: Telmatogetoninae). A New Record for the Turkish Fauna. Journal of the Entomological Research Society, 14 (1), 91–94.
  14. Valkanov, A. (1949) Thalassomya frauenfeldi Schiner ot Cherno More. Trudove na morska biologichna stantsiya v Varna, 14, 103–112. [in Bulgarian]
  15. Valkanov, A. & Michailova, P. (1974) Untersuchungen über den Karyotypus und Chromosomen Polymorphismus bei Thalassomya frauenfeldi Schiner (Diptera, Chironomidae) von der bulgarischen Schwarzmeerküste. Bulletin de l’Institut de Zoologie et Musée Academie Bulgare des Science, 40, 5–16.
  16. White, M.D. (1973) Animal Cytology and Evolution. 3rd Edition. Cambridge University Press, Cambridge, 961 pp.
  17. Wirth, W.W. (1947) Notes on the genus Thalassomya Schiner, with description of two new species (Diptera: Tendipedidae). Proceedings of the Hawaiian Entomological Society, 13, 117–139.
  18. Wülker, W. & Götz, G. (1968) Die Verwendung der Imaginalschiben zur Bestimmung der Entwicklungszustandes von Chironomus Larven. Zeitschrift für Morphologie und Ökologie der Tiere Archives, 62, 363–388. https://doi.org/10.1007/BF00401562
  19. Zhimulev, I. (1998) Polytene chromosomes, Heterochromatin, and Position Effect Variegation. In: Hall, J., Dunlap, J., Friedmann, T. & Giannelli, F. (Eds.), Advances of Genetics. Vol. 37. Academic Press, San Diego and London, pp. 1–566. [http://www.apnet.co.uk/ap/] https://doi.org/10.1016/S0065-2660(08)60341-7

How to Cite

Michailova, P. (2025) External morphology of the larva and polytene chromosomes of Thalassomya paraskevae Makarchenko, Semenchenko, Palatov & Lisanovskaya, 2024 (Diptera, Chironomidae: Telmatogetoninae) from the Bulgarian Black Sea Coast. Zootaxa, 5613 (3). https://doi.org/10.11646/zootaxa.5613.3.7