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Type: Article
Published: 2018-10-18
Page range: 543–552
Abstract views: 134
PDF downloaded: 12

Two new genera of hard ticks, Robertsicus n. gen. and Archaeocroton n. gen., and the solution to the mystery of Hoogstraal’s and Kaufman’s “primitive” tick from the Carpathian Mountains

Department of Parasitology, School of Chemistry and Molecular Biosciences, University of Queensland, Brisbane, 4072, Australia.
Department of Parasitology, School of Chemistry and Molecular Biosciences, University of Queensland, Brisbane, 4072, Australia.
Acari new genus Ixodida United States New Zealand Aponomma ludovici


We establish two new monotypic genera, Robertsicus n. gen. and Archaeocroton n. gen., based on two enigmatic species of Amblyomma. Robertsicus, with the type species R. elaphensis (Price, 1959) n. comb., is proposed for Amblyomma       elaphense, the tick of the Trans-Pecos rat-snake of the Chihuahuan Desert of Mexico and southeastern USA (parts of Arizona, West Texas and New Mexico). Archaeocroton, with the type species Ar. sphenodonti (Dumbleton, 1943) n. comb., is proposed for Amblyomma sphenodonti, the tuatara tick of New Zealand. This is another step in the resolution of the systematic problems concerning the genus Aponomma, a heterogeneous group of eyeless ticks with a predilection for reptiles. By removing R. elaphensis (Price, 1959) and Ar. sphenodonti (Dumbleton, 1943) from the genus Amblyomma we have resolved, for now at least, the polyphyly of the genus Amblyomma. We have also resolved a 50-year old mystery: the identity of Hoogstraal’s and Kaufman’s “primitive” tick from the Carpathian Mountains that had a “striking resemblance” to Ar. sphenodonti n. comb.; it was an Ar. sphenodonti n. comb. that had travelled to the Carpathian       Mountains from New Zealand on a captive tuatara.



  1. Barker, S.C., Walker, A.R. & Campelo, D. (2014) A list of the 70 species of Australian ticks; diagnostic guides to and species accounts of Ixodes holocyclus (paralysis tick), Ixodes cornuatus (southern paralysis tick) and Rhipicephalus australis (Australian cattle tick); and consideration of the place of Australia in the evolution of ticks with comments on four controversial ideas. International Journal for Parasitology, 44, 941–953.

    Burger, T., Shao, R. & Barker, S.C. (2013) Phylogenetic analysis of the mitochondrial genomes and nuclear rRNA genes of ticks reveals a deep phylogenetic structure within the genus Haemaphysalis and further elucidates the polyphyly of the genus Amblyomma with respect to Amblyomma sphenodonti and Amblyomma elaphense. Ticks & Tick-borne Diseases, 4, 265–274.

    Burger, T.D., Shao, R., Beati, L., Miller, H. & Barker, S.C. (2012) Phylogenetic analysis of ticks (Acari: Ixodida) using mitochondrial genomes and nuclear rRNA genes indicates that the genus Amblyomma is polyphyletic. Molecular Phylogenetics & Evolution, 64, 45–55.

    Burger, T.D., Shao, R., Labruna, M.B. & Barker, S.C. (2014) Molecular phylogeny of soft ticks (Ixodida: Argasidae) inferred from mitochondrial genome and nuclear rRNA sequences. Ticks & Tick-borne Diseases, 5, 195–207.

    Degenhardt, W.G. & Degenhardt, P.B. (1965) The host-parasite relationship between Elaphe subocularis (Reptilia: Colubridae) and Aponomma elaphensis (Acarina: Ixodidae). Southwestern Naturalist, 10, 167–178.

    Dobson, S.J. & Barker, S.C. (1999) Phylogeny of the hard ticks (Ixodidae) inferred from 18s rRNA indicates that the genus Aponomma is paraphyletic. Molecular Phylogenetics & Evolution, 11, 288–295.

    Dumbleton, L.J. (1943) A new tick from the tuatara (Sphenodon punctatus). New Zealand Journal of Science & Technology, 24, 185B–190B.

    Godfrey, S.S., Moore, J.A., Nelson, N.J. & Bull, C.M. (2010a) Social network structure and parasite infection patterns in a territorial reptile, the tuatara (Sphenodon punctatus). International Journal for Parasitology, 40, 1575–1585.

    Godfrey, S.S., Bull, C.M. & Nelson, N.J. (2008) Seasonal and spatial dynamics of ectoparasite infestation of a threatened reptile, the tuatara (Sphenodon punctatus). Medical & Veterinary Entomology, 22, 374–385.

    Godfrey, S.S., Moore, J.A., Nelson, N.J. & Bull, C.M. (2010b) Unravelling causality from correlations: revealing the impacts of endemic ectoparasites on a protected species (tuatara). Parasitology, 137, 275–286.

    Godfrey, S.S., Nelson, N.J. & Bull, C.M. (2011a) Ecology and dynamics of the blood parasite, Hepatozoon tuatarae (Apicomplexa), in tuatara (Sphenodon punctatus) on Stephens Island, New Zealand. Journal of Wildlife Diseases, 47, 126–139.

    Godfrey, S.S., Nelson, N.J. & Bull, C.M. (2011b) Microhabitat choice and host-seeking behaviour of the tuatara tick, Amblyomma sphenodonti (Acari: Ixodidae). New Zealand Journal of Ecology, 35, 52–60.

    Guglielmone, A.A., Robbins, R.G., Apanaskevich, D.A., Petney, T.N., Estrada-Peña, A. & Horak, I.G. (2014) The Hard Ticks of the World. Dordrecht Springer, Heidelberg, 713 pp.

    Heath, A.C.G. (1977) Zoogeography of the New Zealand tick fauna. Tuatara, 23, 26–39.

    Heath, A.C.G. (2006) A reptile tick, Aponomma sphenodonti Dumbleton (Acari: Ixodidae), parasitic on the tuatara, Sphenodon punctatus gray (Reptilia: Rhyncocephalia), in New Zealand: observations on its life history and biology. Systematic & Applied Acarology, 11, 3–12.

    Heath, A.C.G. & Palma, R.L. (2017) A new species of tick (Acari: Ixodidae) from seabirds in New Zealand and Australia, previously misidentified as Ixodes eudyptidis. Zootaxa, 4324, 285–314.

    Heath, A.C.G., Palma, R.L., Cane, R.P. & Hardwick, S. (2011) Checklist of New Zealand ticks (Acari: Ixodidae, Argasidae). Zootaxa, 2995, 55–63.

    Herbert, J.D., Godfrey, S.S., Bull, C.M. & Menz, R.I. (2010) Developmental stages and molecular phylogeny of Hepatozoon tuatarae, a parasite infecting the New Zealand tuatara, Sphenodon punctatus and the tick, Amblyomma sphenodonti. International Journal for Parasitology, 40, 1311–1315.

    Hoogstraal, H. & Kim, K.C. (1985) Tick and mammal coevolution with emphasis on Haemaphysalis. In: Kim, K.C. (Ed.), Coevolution of Parasitic Arthropods and Mammals. John Wiley & Sons, New York and Chichester, pp. 505–568.

    Kaufman, T. S. (1972) A revision of the genus Aponomma Neumann, 1899 (Acarina: Ixodidae). Unpublished Phd thesis University of Maryland, College Park, Maryland, 389 pp.

    Keirans, J.E. & Degenhardt, W.G. (1985) Aponomma elaphense Price, 1959 (Acari: Ixodidae): diagnosis of the adults and nymph with first description of the larva. Proceedings of the Biological Society of Washington, 98, 711–717.

    Keirans, J.E. & Hillyard, P.D. (2001) A catalogue of the type specimens of Ixodida (Acari: Argasidae, Ixodidae) deposited in the Natural History Museum, London. Occasional Papers on Systematic Entomology, 13, 1–74.

    Klompen, H., Dobson, S.J. & Barker, S.C. (2002) A new subfamily, Bothriocrotoninae n. subfam., for the genus Bothriocroton Keirans, King & Sharrad, 1994 status amend. (Ixodida : Ixodidae), and the synonymy of Aponomma Neumann, 1899 with Amblyomma Koch, 1844. Systematic Parasitology, 53, 101–107.

    Klompen, J.S.H., Oliver, J.H., Keirans, J.E. & Homsher, P.J. (1997) A re-evaluation of relationships in the Metastriata (Acari: Parasitiformes: Ixodidae). Systematic Parasitology, 38, 1–24.

    Miller, H.C., Conrad, A.M., Barker, S.C. & Daugherty, C.H. (2007) Distribution and phylogenetic analyses of an endangered tick, Amblyomma sphenodonti. New Zealand Journal of Zoology, 34, 97–105.

    Neumann, L.G. (1899) Revision de la familles des ixodes. Memoires de la Societe Zoologique de France, 12, 107–294.

    Price, M.A. (1959) A new species of tick from the trans-pecors region of Texas. Journal of Parasitology, 4, 649–651.

    Ruffell, J.S. (2005) The use of translocation in tuatara (Sphenodon punctatus punctatus) conservation and relationships between the tuatara and the tick Aponomma sphenodonti (Acari: Ixodida). Unpublished MSc thesis, The University of Auckland, Auckland, pp. 134.

    Siuda, K. (1972) New species of a tick—Aponomma ludovici n. sp. (Acarina, Ixodidae) collected in Poland. Wiadomosci Parazytologicizne, 18, 735–743.

    Siuda, K. (1982) Aponomma ludovici Siuda, 1972 as a junior synonym of Aponomma sphenodonti Dumbleton, 1943, (Acarina: Ixodides: Ixodidae). Wiadomosci Parazytologicizne, 28, 423–425.