Adropion camtchaticum, a new species of Tardigrada (Eutardigrada: Itaquasconidae) from the Russian Far East

D.V. Tumanov & A.A. Kalimullin

Abstract. Adropion camtchaticum sp. nov. (Tardigrada: Eutardigrada: Itaquasconidae) is described. The type specimens of the new species were found in a moss sample collected on the Kamchatka Peninsula. The new species is most similar to A. scoticum (Murray, 1905), but clearly differs from the latter in the larger body size, thinner bucco-pharyngeal tube, the presence of teeth in the oral cavity, and toothed bases of claws of all legs. It is the first record of semiterrestrial tardigrades from the continental part of the Russian Far East.

Key words: tardigrades, semiterrestrial fauna, Russia, Far East, Kamchatka Peninsula, Hypsibioidea, Itaquasconidae, Adropion, new species

Zoosystematica Rossica, 2024, 33(1): 19-27 ▪ Published online 20 April 2024

https://doi.org/10.31610/zsr/2024.33.1.19 ▪ Open full article

References

Abe W. 2004. A new species of the genus Hypsibius (Tardigrada: Parachela: Hypsibiidae) from Sakhalin Island, Far East Russia. Zoological Science, 21: 957–962. https://doi.org/10.2108/zsj.21.957

Beasley C.W., Kaczmarek Ł. & Michalczyk Ł. 2008. Doryphoribius mexicanus, a new species of Tardigrada (Eutardigrada: Hypsibiidae) from Mexico (North America). Proceedings of the Biological Society of Washington, 121(1): 34–40. https://doi.org/10.2988/07-30.1

Bertolani R., Guidetti R., Marchioro T., Altiero T., Rebecchi L. & Cesari M. 2014. Phylogeny of Eutardigrada: new molecular data and their morphological support lead to the identification of new evolutionary lineages. Molecular Phylogenetics and Evolution, 76: 110–126. https://doi.org/10.1016/j.ympev.2014.03.006

Biserov V.I. 1988. Limnetic tardigrades of some areas in the USSR. Zoologicheskiy Zhurnal, 67(12): 1798–1811. (In Russian).

Biserov V.I. 1996. Macrobiotus lorenae sp.n., a new species of Tardigrada (Eutardigrada Macrobiotidae) from the Russian Far East. Arthropoda selecta, 5(1–2): 145–149.

Biserov V.I. 1998. The Tardigrada of the Komandorskiye Islands, with a description of Dactylobiotus dervizi sp. n. (Eutardigrada, Macrobiotidae). Entomologische Mitteilungen aus dem Zoologischen Museum Hamburg, 12: 327–336.

Biserov V.I., Pilato G. & Lisi O. 2011. Macrobiotus trunovae sp.n., a new species of tardigrade from Russia. Invertebrate Zoology, 8(1): 57–62. https://doi.org/10.15298/invertzool.08.1.07

Dastych H. 2015. Tardigrada. In: Schuster R. (Ed.). Checklisten der Fauna Österreichs, 8. Biosystematics and Ecology Series, 31: 1–25. Verlag der Österreichischen Akademie der Wissenschaften. https://doi.org/10.1553/0x00327e9a

Dudichev A.L. & Biserov V.I. 2000. Tardigrades (Tardigrada) from lturup and Paramushir, the Kuril Islands. Zoologicheskiy Zhurnal, 79(7): 771–778. (In Russian; English translation: Entomological Review, 80(Supplement 1): S76–S83).

Gąsiorek P., Blagden B., Morek W. & Michalczyk Ł. 2023. What is a “strong” synapomorphy? Redescriptions of Murray’s type species and descriptions of new taxa challenge the systematics of Hypsibiidae (Eutardigrada: Parachela). Zoological Journal of the Linnean Society, zlad151. https://doi.org/10.1093/zoolinnean/zlad151

Gąsiorek P. & Michalczyk Ł. 2020. Phylogeny of Itaquasconinae in the light of the evolution of the flexible pharyngeal tube in Tardigrada. Zoologica Scripta, 49: 499–515. https://doi.org/10.1111/zsc.12424

Gąsiorek P., Stec D., Morek W. & Michalczyk Ł. 2019. Deceptive conservatism of claws: distinct phyletic lineages concealed within Isohypsibioidea (Eutardigrada) revealed by molecular and morphological evidence. Contributions to Zoology, 88(1): 78–132. https://doi.org/10.1163/18759866-20191350

Gąsiorek P., Stec D., Morek W., Zawierucha K., Kaczmarek Ł., Lachowska-Cierlik D. & Michalczyk Ł. 2016. An integrative revision of Mesocrista Pilato, 1987 (Tardigrada: Eutardigrada: Hypsibiidae). Journal of natural History, 50: 2803–2828. https://doi.org/10.1080/00222 933.2016.1234654

Kaczmarek Ł. & Michalczyk Ł. 2017. The Macrobiotus hufelandi group (Tardigrada) revisited. Zootaxa, 4363(1): 101–123. https://doi.org/10.11646/zootaxa.4363.1.4

Maskin E.V., Grebenkin P.V., Zheleznova L.V. & Tumanov D.V. 2021. New data on tardigrades of the genus Milnesium (Tardigrada, Eutardigrada, Milnesiidae) from the Russian Far East, obtained using the method of molecular barcoding. Chteniya pamyati A.I. Kurentsova [A.I. Kurentsov’s annual memorial Meetings], 32: 114–122. (In Russian). https://doi.org/10.25221/kurentzov.32.11

McInnes S.J. & Pugh P.J.A. 1998. Biogeography of limnoterrestrial Tardigrada, with particular reference to the Antarctic fauna. Journal of Biogeography, 25: 31–36. https://doi.org/10.1046/j.1365-2699.1998.251176.x

McInnes S.J. & Pugh P.J.A. 2007. An attempt to revisit the global biogeography of limno-terrestrial Tardigrada. Journal of Limnology, 66(Supplement 1): 90–96. https://doi.org/10.4081/jlimnol.2007.s1.90

Michalczyk Ł. & Kaczmarek Ł. 2003. A description of the new tardigrade Macrobiotus reinhardti (Eutardigrada: Macrobiotidae, harmsworthi group) with some remarks on the oral cavity armature within the genus Macrobiotus Schultze. Zootaxa, 331(1): 1–24. https://doi.org/10.11646/zootaxa.331.1

Michalczyk Ł. & Kaczmarek Ł. 2013. The Tardigrada register: a comprehensive online data repository for tardigrade taxonomy. Journal of Limnology, 72(S1): e22. https://doi.org/10.4081/jlimnol.2013.s1.e22

Morek W., Stec D., Gąsiorek P., Schill R.O., Kaczmarek Ł. & Michalczyk Ł. 2016. An experimental test of eutardigrade preparation methods for light microscopy. Zoological Journal of the Linnean Society, 178(4): 785–793. https://doi.org/10.1111/zoj.12457

Pilato G. 1981. Analisi di nuovi caratteri nello studio degli Eutardigradi. Animalia, 8(1/3): 51–57.

Pilato G. 1987. Revision of the genus Diphascon Plate, 1889, with remarks on the subfamily Itaquasconinae (Eutardigrada, Hypsibiidae). In: Bertolani R. (Ed.). Biology of tardigrades: Proceedings of the 4th International Symposium on the Tardigrada, Modena, September 3–5, 1985: 337–357. Modena: Mucchi.

Pilato G. & Binda M.G. 2010. Definition of families, subfamilies, genera and subgenera of the Eutardigrada, and keys to their identification. Zootaxa, 2404(1): 1–54. https://doi.org/10.11646/zootaxa.2404.1.1

Pilato G., Binda M.G. & Claxton S. 2002. Itaquascon unguiculum and Itaquascon cambewarrense: two new species of eutardigrades from Australia. New Zealand Journal of Zoology, 29(2): 87–93. https://doi.org/10.1080/03014223.2002.9518293

Tumanov D.V. 2018. Hypsibius vaskelae, a new species of Tardigrada (Eutardigrada, Hypsibiidae) from Russia. Zootaxa, 4399(3): 434–442. https://doi.org/10.11646/zootaxa.4399.3.12

Tumanov D.V. & Tsvetkova A.Y. 2023. Some have drops and some not, but can we rely on this? Updated description of Diphascon tenue (Tardigrada, Eutardigrada) from Spitsbergen with discussion on the phylogeny and taxonomy of the superfamily Hypsibioidea. Zoosystematica Rossica, 32(1): 50–74. https://doi.org/10.31610/zsr/2023.32.1.50

Vecchi M., Tsvetkova A.Y., Stec D., Ferrari C., Calhim S. & Tumanov D.V. 2023. Expanding Acutuncus: phylogenetics and morphological analyses reveal a considerably wider distribution for this tardigrade genus. Molecular Phylogenetics and Evolution, 180: 107707. https://doi.org/10.1016/j.ympev.2023.107707

Zawierucha K., Stec D., Dearden P.D. & Shain D.H. 2023. Two new tardigrade genera from New Zealand’s Southern Alp glaciers display morphological stasis and parallel evolution. Molecular Phylogenetics and Evolution, 178: 107634. https://doi.org/10.1016/j.ympev.2022.107634

Volume, Year: