Ukrainian Antarctic Journal

Vol 21 No 2(27) (2023): Ukrainian Antarctic Journal
Articles

The first record and description of females of the genus Acunemella Andrássy, 2002 (Nematoda, Nordiidae) from the South Shetland Islands

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  • S. Susulovska,
  • A. Susulovsky
S. Susulovska
Zoological Museum, Ivan Franko National University of Lviv, Lviv, 79000, Ukraine
A. Susulovsky
State Museum of Natural History of the National Academy of Science of Ukraine, Lviv, 79008, Ukraine
Spectrograms of the signal emitted from Vernadsky and received onboard RV Noosfera after reflection from the ionosphere, the black line shows the X component of the geomagnetic field measured at the Vernadsky AIA station. See paper Zalizovski et al. 2024 (page 195). Photo by S. Glotov and from the archive of the SI NASC
DOI: https://doi.org/10.33275/1727-7485.2.2023.719
Published December 31, 2023
Keywords
  • Antarctica,
  • Deception Island,
  • morphology,
  • nematodes,
  • taxonomy
How to Cite
Susulovska, S., & Susulovsky, A. (2023). The first record and description of females of the genus Acunemella Andrássy, 2002 (Nematoda, Nordiidae) from the South Shetland Islands. Ukrainian Antarctic Journal, 21(2(27), 230-234. https://doi.org/10.33275/1727-7485.2.2023.719

Copyright (c) 2023 Ukrainian Antarctic Journal

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Abstract

There is a single record of the rare terrestrial nematode genus Acunemella Andrássy, 2002 (Nematoda, Nordiidae) in the type locality on Chiloé Island (South Chile). The type species of the genus, Acunemella torta Andrássy, 2002, was described on the basis of only two male specimens. In this article, mature females of the genus Acunemella are described for the first time based on morphology and morphometrics of specimens from Deception Island (South Shetland Islands). The current article is the first report of this genus from the Antarctic region. Females from Deception Island are characterized by a didelphic-amphidelphic genital system, with both branches almost equally developed, a distinct muscular sphincter between oviduct and uterus, a curling outer surface of the uterus, pars refringens vaginae moderately sclerotized, with two relatively large (4–6 × 12–13 μm) rounded triangular pieces, a vulval region with well-developed cuticular folds. Morphologically, females are similar to originally described males but differ by longer bodies, more distinctly offset lip regions and the shape of sperm cells in uterus. Verifying the taxonomic status of the population described in this article requires the analysis of additional materials.

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