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Issue: Vol. 5845 No. 1: 3 Jul. 2026
Type: Article
Published: 2026-07-03
DOI: 10.11646/zootaxa.5845.1.1
Page range: 1-27
Abstract views: 29
PDF downloaded: 3

A new stygobitic genus and species of Cyclopinae (Crustacea, Copepoda, Cyclopoida), from the epikarst of Scrivilleri Cave, Sicily (Italy)

Department for Innovation in Biological; Agro-food and Forest Systems; Tuscia University; Largo dell’Università snc; 01100 Viterbo; Italy
Research and Innovation Centre; Fondazione Edmund Mach; Via E. Mach 1; 38098 San Michele all’Adige (TN); Italy
Department of Biological; Geological and Environmental Sciences; Catania University; Via Androne 81; 95124 Catania; Italy
Department of Biological; Geological and Environmental Sciences; Catania University; Via Androne 81; 95124 Catania; Italy
Department of Biological; Geological and Environmental Sciences; Catania University; Via Androne 81; 95124 Catania; Italy
Crustacea Sicilian fauna new genus crustacean stygofauna Korecyclops epikarst Metacyclops Pseudohesperocyclops

Abstract

A new genus and species of Cyclopinae, Korecyclops alpha gen. nov. sp. nov., is described based on specimens retrieved from the epikarstic drip collecting in a rimstone pool of a Sicilian cave (Southern Italy). The new monotypic genus is characterized by the number of spines and setae on second segments of Exp P1–P4: 3.3.3.2, and 5.5.5.5, respectively; and by the number of spines and setae on second segments of Enp P1–P4: 1.1.1.1 and 4.5.5.4, respectively. Korecyclops alpha gen. nov. sp. nov. is an epikarstic, stygobitic species whose morphological characters associated with the size and oligomerisation of the appendages, relate it to the Microcyclops group Pesce 1996, as recently discussed by Boonyanusith et al. (2018), to the Metacyclops complex Karanovic et al. 2011, and to Pseudohesperocyclops Brancelj, Boonyanusith & Sanoamuang 2024. The strongest morphological affinities of the new species are with the genus Pseudohesperocyclops, but the two genera differ in the spinal formula of P1–P4 exp-2 and in the setal formula of P1–P4 enp-2, in the position and length ration of the ornamentation of P5 exopodal seta and spine, in the body shape and spermatophore shape. Korecyclops alpha gen. nov. sp. nov. represents a contribution to the knowledge of the diversity and of the low-range endemism of the groundwater taxa of the Sicilian karst; the discovery of this new genus reinforces the need of further investigating and protecting the epikarstic and karstic habitats. Some peculiar morphological and ethological adaptations of copepod fauna to life and colonization of the epikarst are presented and discussed. The existing species list of Sicily is updated by presenting unpublished data on the crustacean populations of groundwater of Sicily and some circum-Sicilian islands.

References

  1. Athibai, S., Wongkamhaeng, K. & Boonyanusith, C. (2022) Two new species of Metacyclops Kiefer, 1927 (Copepoda, Cyclopoida) from Thailand and an up-to-date key to the species recorded in Asia. European Journal of Taxonomy, 787, 146–181. https://doi.org/10.5852/ejt.2021.787.1621
  2. Boonyanusith, C., Sanoamuang, L. & Brancelj, A. (2018) A new genus and two new species of cave-dwelling cyclopoids (Crustacea, Copepoda) from the epikarst zone of Thailand and up-to-date keys to genera and subgenera of the Bryocyclops and Microcyclops groups. European Journal of Taxonomy, 431. https://doi.org/10.5852/ejt.2018.431
  3. Boxshall, G.A. & Halsey, S.H. (2004) An introduction to copepod diversity. Ray Society, London, 2000 pp.
  4. Brancelj, A. (2003) Biological sampling for epikarst water. In: Jones, W.K., Culver, D.C. & Herman, J.S. (Eds.), Epikarst. Proceedings of the Karst Water Institute symposium; 1–4 Octobre 2003, Sheperdstown (WV). Karts Water Institute Special Publication no. 9, pp. 99–103.
  5. Brancelj, A. (2009) Fauna of an unsaturated karstic zone in Central Slovenia: two new species of Harpacticoida (Crustacea: Copepoda), Elaphoidella millennii n. sp. and E. tarmani n. sp., their ecology and morphological adaptations. Hydrobiologia, 621 (1), 85–104. https://doi.org/10.1007/s10750-008-9634-3
  6. Brancelj, A. (2011) Copepoda from a deep-groundwater porous aquifer in contact with karst: description of a new species, Paramorariopsis brigitae n. sp. (Copepoda, Harpacticoida). In: Defaye, D., Suarez-Morales, E. & Von Vaupel Klein, J.C. (Eds.), Studies on Freshwater Copepoda: a Volume in Honour of Bernard Dussart. BRILL, pp. 85–104. https://doi.org/10.1163/ej.9789004181380.i-566.29
  7. Brancelj, A., Boonyanusith, C. & Sanoamuang, L. (2024) A new cyclopoid genus (Copepoda, Crustacea) from a deep aquifer in northeastern Thailand with comments on peculiar sampling sites and local fauna. Raffles Bulletin of Zoology, 72, 71–83. https://doi.org/10.26107/RBZ-2024-0005
  8. Bruno, M.C. & Cottarelli, V. (1999) Harpacticoids from groundwaters in the Philippines: Parastenocaris mangyans new species, Epactophanes philippinus new species and redescription of Phyllognathopus bassotii (Crustacea, Copepoda). Journal of Crustacean Biology, 19 (3), 510–529. https://doi.org/10.2307/1549260
  9. Bruno, M.C., Cottarelli, V., Hauffe, H.C., Rossi, C., Obertegger, U., Grasso, R. & Spena, M.T. (2017) Morphological and molecular analyses of epikarstic Parastenocarididae (Copepoda: Harpacticoida) from two Sicilian caves, with description of a new Stammericaris. Zootaxa, 4350 (2), 251–283. https://doi.org/10.11646/zootaxa.4350.2.3
  10. Bruno, M.C., Cottarelli, V., Marrone, F., Grasso, R., Stefani, E., Vecchioni, L. & Spena, M.T. (2020) Morphological and molecular characterization of three new Parastenocarididae (Copepoda: Harpacticoida) from caves in Southern Italy. European Journal of Taxonomy, 689. https://doi.org/10.5852/ejt.2020.689
  11. Bruno, M.C., Cottarelli, V., Grasso, R., Spena, M.T., Caccamo, D.V., Marrone, F. & Vecchioni, L. (2023) Disentangling cryptic species in Parastenocarididae (Copepoda: Harpacticoida) with an integrative approach: the case of Stammericaris similior sp. nov. and Stammericaris destillans Bruno & Cottarelli 2017. Zootaxa, 5271 (2), 271–293. https://doi.org/10.11646/zootaxa.5271.2.4
  12. Cavallaro, F. (1998) Fenomeni carsici nel territorio di Melilli. In: Centro Speleologico Etneo (Ed.), Le grotte del territorio di Melilli. Comune di Melilli, Melilli, pp. 45–58.
  13. Cottarelli, V., Bruno, M.C. & Berera, R. (2008) Two new species of Parastenocaris (Copepoda, Harpacticoida, Parastenocarididae) from groundwater of Sardinia and Sicily. Crustaceana, 81, 537–555. https://doi.org/10.1163/156854008784092274
  14. Cottarelli, V., Bruno, M.C., Spena, M.T. & Grasso, R. (2012) Studies on subterranean copepods from Italy, with descriptions of two new epikarstic species from a cave in Sicily. Zoological Studies, 51, 556–582.
  15. Da Rocha, C.E.F. & De Carvalho Bjornber, M.H.G. (1987) Copepods of the Juréia ecological reserve, state of São Paulo, Brazil. II. The genera Hesperocyclops, Muscocyclops and Bryocyclops (Cyclopoida, Cyclopidae). Hydrobiologia, 153 (2), 97–107. https://doi.org/10.1007/BF00006642
  16. Ferrari, F. (2001) Interpreting segment homologies of the maxilliped of cyclopoid copepods by comparing stage-specific changes during development. Organisms Diversity & Evolution, 1 (2), 113–131. https://doi.org/10.1078/1439-6092-00009
  17. Ferrari, F.D. & Ivanenko, V.N. (2009) Remarks on the ‘Subcoxa’ hypothesis from Bäcker et al. (2008). Zoologischer Anzeiger - A Journal of Comparative Zoology, 248 (1), 33–34. https://doi.org/10.1016/j.jcz.2008.10.001
  18. Galassi, D.P. & Pesce, G.L. (1992) The genus Hesperocyclops Herbst: an update, and description of Hesperocyclops venezuelanus n. sp. from Venezuela (Crustacea Copepoda: Cyclopidae). Stygologia, 7, 219–224.
  19. Herbst, H.-V. (1988) Amsterdam Expeditions to the West Indian Islands, Report 54. Zwei neue Metacyclops (Crustacea Copepoda) von den Westindischen Inseln Barbados und Aruba: M. agnitus n. sp. und M. mutatus n. sp., sowie ein Bestimmungsschlüssel für das genus. Bijdragen Tot de Dierkunde, 58, 137–154. https://doi.org/10.1163/26660644-05801011
  20. Huys, R. & Boxshall, G.A. (1991) Copepod evolution. Ray Society, London, 468 pp.
  21. Karanovic, T. (2004a) Subterranean copepoda from arid Western Australia. Brill, Leiden ; Boston, 366 pp.
  22. Karanovic, T. (2004b) The genus Metacyclops Kiefer in Australia (Crustacea: Copepoda: Cyclopoida), with description of two new species. Records of the Western Australian Museum, 22 (3), 193. https://doi.org/10.18195/issn.0312-3162.22(3).2004.193-212
  23. Karanovic, T., Eberhard, S.M. & Murdoch, A. (2011) A cladistic analysis and taxonomic revision of Australian Metacyclops and Goniocyclops, with description of four new species and three new genera (Copepoda, Cyclopoida). Crustaceana, 84 (1), 1–67. https://doi.org/10.1163/001121610X546698
  24. Lee, J.M. & Chang, C.Y. (2015) Metacyclops woni n. sp., a new cyclopoid species (Copepoda: Cyclopoida: Cyclopidae) from Cambodia. Animal Systematics Evolution and Diversity, 31 (4), 247–256. https://doi.org/10.5635/ased.2015.31.4.247
  25. Lindberg, K. (1961) Remarques sur le genre Metacyclops (Kiefer, 1927) et description d’un Metacyclops nouveau du Portugal. Kungl, Fysiografiska Sällskapets I Lund Förhandlingar, 31 (14), 133–145.
  26. Pendino, V., Vecchioni, L., Stoch, F. & Marrone, F. (2024) Checklist and distribution of the groundwater crustacean fauna from Sicily, Italy. Journal of Limnology, 83, 106–121. https://doi.org/10.4081/jlimnol.2024.2199
  27. Pesce, G.L. (1987) A new species of Schizopera Sars 1905 from groundwaters of Sicily, Italy (Crustacea: Copepoda: Diosaccidae). Senckenbergiana biologica, 68, 413–417.
  28. Pesce, G.L. (1996) Towards a revision of Cyclopinae copepods (Crustacea, Cyclopidae). Fragmenta Entomologica, 28, 189–200.
  29. Pesce, G.L. & Galassi, D.P. (1987) Copepodi di acque sotterranee della Sicilia. Animalia, 14, 193–235.
  30. Pesce, G.L. & Galassi, D.P. (1988) Una nuova Attheyella di acque sotterranee italiane: Attheyella (Brehmiella) paranaphtalica n. sp. Fragmenta Entomologica, 21, 1–7.
  31. Pesce, G.L., Galassi, D.P. & Apostolov, A. (1987) The genus Elaphoidella Chappuis (Copepoda: Harpacticoida) in Italy, including the description of five new species. Bollettino di Zoologia, 54 (2), 177–185. https://doi.org/10.1080/11250008709355579
  32. Pesce, G.L., Galassi, D. & Cottarelli, V. (1988) First representative of the family Parastenocarididae from Sicily (Italy), and description of two new species of Parastenocaris Kessler (Crustacea: Copepoda: Harpacticoida). Bulletin Zoologisch Museum, 11 (16), 137–142.
  33. Reid, J.W. (1987) The cyclopoid copepods of a wet campo marsh in central Brazil. Hydrobiologia, 153 (2), 121–138. https://doi.org/10.1007/BF00006644
  34. Reid, J.W. (1991) The Genus Metacyclops (Copepoda: Cyclopoida) present in North America: M. cushae, new species, from Louisiana. Journal of Crustacean Biology, 11 (4), 639–646. https://doi.org/10.2307/1548532
  35. Reid, J.W. (1992) Redescription of Diacyclops nearcticus (Kiefer, 1934) and description of four similar new congeners from North America, with comments on D. crassicaudis (G.O. Sars, 1863) and D. crassicaudis var. brachycercus (Kiefer, 1927) (Crustacea:Copepoda). Canadian Journal of Zoology, 70, 1445–1469. https://doi.org/10.1139/z92-201
  36. Reid, J.W. & Strayer, D.L. (1994a) Diacyclops dimorphus, a New Species of Copepod from Florida, with Comments on Morphology of Interstitial Cyclopine Cyclopoids. Journal of the North American Benthological Society, 13 (2), 250–265. https://doi.org/10.2307/1467243
  37. Rendoš, M., Hřívová, D.K., Desiderato, A., Haviarová, D., Grabowski, M. & Karpowicz, M. (2026) Epikarst Drives Speciation in Stygobiotic Harpacticoid Copepods: An Integrative Taxonomic Study of Elaphoidella in the Western Carpathians with Description of a New Species. Zoologica Scripta, 55 (1), 153–165. https://doi.org/10.1111/zsc.70018
  38. Sanoamuang, L., Boonyanusith, C. & Brancelj, A. (2019) A new genus and new species of stygobitic copepod (Crustacea: Copepoda: Cyclopoida) from Thien Duong Cave in Central Vietnam, with a redescription of Bryocyclops anninae (Menzel, 1926). Raffles Bulletin of Zoology, 67, 189–205. https://doi.org/10.26107/RBZ-2019-0016
  39. Stoch, F. (1987) Cave-dwelling cyclopoids (Crustacea, Copepoda) from Venezia Giulia (northeastern Italy). Bulletin Zoologisch Museum, 11 (5), 41–55.
  40. Walter, T.C. & Boxshall, G. (2026) World of Copepods Database. Metacyclops Kiefer, 1927. World Register of Marine Species, Available from: https://www.marinespecies.org/aphia.php?p=taxdetails&id=347484 (accessed 13 February 2026)
  41. Watiroyram, S. & Koompoot, K. (2024) Siamcyclops isanus sp. nov. (Copepoda, Cyclopoida, Cyclopidae), a new cave-dwelling species from northeastern Thailand. Subterranean Biology, 49, 185–200. https://doi.org/10.3897/subtbiol.49.135303

How to Cite

Cottarelli, V., Bruno, M.C., Spena, M.T., Caccamo, D.V. & Grasso, R. (2026) A new stygobitic genus and species of Cyclopinae (Crustacea, Copepoda, Cyclopoida), from the epikarst of Scrivilleri Cave, Sicily (Italy). Zootaxa, 5845 (1), 1–27. https://doi.org/10.11646/zootaxa.5845.1.1