New records and unusual morphology of the cave hydrozoan Velkovrhia enigmatica Matjašič & Sket, 1971 (Cnidaria: Hydrozoa: Bougainvilliidae)

Authors

  • Maja Zagmajster Skupina za speleobiologijo, Oddelek za biologijo, Biotehniška fakulteta, Univerza v Ljubljani, Večna pot 111, SI-1000 Ljubljana
  • Teo Delić Skupina za speleobiologijo, Oddelek za biologijo, Biotehniška fakulteta, Univerza v Ljubljani, Večna pot 111, SI-1000 Ljubljana
  • Simona Prevorčnik Skupina za speleobiologijo, Oddelek za biologijo, Biotehniška fakulteta, Univerza v Ljubljani, Večna pot 111, SI-1000 Ljubljana
  • Valerija Zakšek Skupina za speleobiologijo, Oddelek za biologijo, Biotehniška fakulteta, Univerza v Ljubljani, Večna pot 111, SI-1000 Ljubljana

DOI:

https://doi.org/10.14720/ns.15.2.13-22

Keywords:

Velkovrhia enigmatica, Hydrozoa, Planinska jama, Logarček, morphology

Abstract

Velkovrhia enigmatica is the only freshwater hydrozoan living exclusively in groundwater. It is endemic to the Dinarides in the Balkan Peninsula, where it has been known from four caves only. Here we report on a new V. enigmatica population from cave Logarček near Laze in southwestern Slovenia. In addition, after almost 30 years since its last recorded presence, we confirm the current presence of numerous V. enigmatica individuals in the type locality, Planinska jama. Individuals from the two caves were morphologically different: polyps from the type locality had 4–9 tentacles, while the ones from Logarček had 14–36 tentacles. The mitochondrial DNA sequences in populations from both caves did not differ. Additional research is needed to provide further insights into species taxonomy, biology and distribution.

References

Annandale N. (1907): Seasonal variations in Hydra orientalis. Jour. and Proc. Asiatic Soc. Bengal n.s.: 27–28.

Berninger J. (1910): Über Einwirkung des Hungers auf Hydra. Zool. Anz. 36: 271–279.

Cunningham C.W., Buss L.W. (1993): Molecular evidence for multiple episodes of paedomorphosis in the family Hydractiniidae. Biochem. Syst. Ecol. 21: 57–69. DOI: https://doi.org/10.1016/0305-1978(93)90009-G

Gabrovšek F., Turk J. (2010): Observations of stage and temperature dynamics in the epiphreatic caves within the catchment area of the Ljubljanica River (Slovenia). Geol. Croat. 63(2): 187-193. DOI: https://doi.org/10.4154/gc.2010.16

Gams I. (1963): Logarček. Acta carsol. III: 5-84.

Gams I. (2003): Kras v Sloveniji v prostoru in času. Inštitut za raziskovanje krasa ZRC SAZU, 516 pp.

Illič U. (2012): Logarček trenutno dolg 4334 m. Internet site of Jamarski klub Železničar: http://www.ljudmila.org/jkz/html/logarcek_2003.html (accesed on: 20. 2. 2012).

Kepner W.A., Jester P. N. (1927): The Reaction of Hydra to inanition. Biol. Bull. 52: 173–84. DOI: https://doi.org/10.2307/1536973

Kinne O. (1957): Über den Einfluss von Temperatur und Salzgehalt auf die Kopchenform des Brackwasserpolypen Cordylophora. Verh. deut. Z. 20: 445–449.

Kuštor V. (1977): Ožigalke sladkovodnega jamskega Hydroida Velkovrhia enigmatica in njen sistematski pomen. Biološki vestnik 25: 51-54.

Matjašič J., Sket B. (1971): Jamski hidroid s slovenskega krasa. Biološki vestnik 19: 139–145.

Sket B. (1970): Predhodno poročilo o ekoloških raziskavah v sistemu kraške Ljubljanice. Biološki vestnik 18: 79-87.

Sket B., Matjašič J. (1977): Eine interessante unterirdische Hydroiden-Art aus Jugoslawien. Proceedings of the 6th International Congress of Speleology 5: 263-265.

Smith D.G., Werle S.F., Klekowski E. (2002): The rapid colonization and emerging biology of Cordylophora caspia (Pallas, 1771) (Cnidaria: Clavidae) in the Connecticut River. J. Freshwater. Ecol. 17(3): 423-430. DOI: https://doi.org/10.1080/02705060.2002.9663916

Threlkeld W. L., Hall S. R. (1928): Observations on Hydra and Pelmatohydra under determined hydrogen ion concentration. Zool. Anz., 51: 409–432. DOI: https://doi.org/10.2307/1536795

Velikonja M. (1986): Contribution to the knowledge of the biology of the Yugoslav endemic cave hydroid Velkovrhia enigmatica Matjašič & Sket, 1971. Proceedings of 9th International Speleological Congress, Barcelona, pp. 123-125.

Zagmajster M., Porter M.L., Fong D.W. (2011): Freshwater hydrozoans in caves with report on new records. Speleobiology Notes 3: 4-10.

Downloads

Published

30.12.2013

Issue

Section

Scientific paper

How to Cite

Zagmajster, M., Delić, T., Prevorčnik, S., & Zakšek, V. (2013). New records and unusual morphology of the cave hydrozoan Velkovrhia enigmatica Matjašič & Sket, 1971 (Cnidaria: Hydrozoa: Bougainvilliidae). Natura Sloveniae, 15(2), 13-22. https://doi.org/10.14720/ns.15.2.13-22

Similar Articles

1-10 of 15

You may also start an advanced similarity search for this article.

Most read articles by the same author(s)

1 2 3 > >>