Abstract
The Australian species of the small heterogastrid genus Parathyginus Scudder, 1957 have been reviewed, resulting in the establishment of the junior subjective synonymy of P. doddi (Distant, 1918) with P. signifer (Walker, 1872), and the description of two new species, P. australis sp. nov. and P. acuminatus sp. nov. A redescription of the genus is provided with emphasis on male and female genitalia characters, along with a key to all included Australian species. Male genitalia, particularly the details of the aedeagus, have been rarely studied in this genus or for that matter the family Heterogastridae particularly due to the difficulty in inflating the inflatable sections. In this study, therefore, an attempt was made to fully inflate and describe the aedeagus of all the species included in this contribution, as well as of Heterogaster urticae (Fabricius, 1775), the type species of the oldest genus Heterogaster Schilling, 1829, of the family Heterogastridae.
References
Ashlock, P.D. (1957) An investigation of the taxonomic value of the phallus in the Lygaeidae (Hemiptera-Heteroptera). Annals of Entomological Society of America, 50, 407–426. https://doi.org/10.1093/aesa/50.4.407
Ban, T. (2018) The lygaeoid bug family Heterogastridae (Hemiptera: Heteroptera: Lygaeoidea) from Laos and Thailand, with descriptions of three new species. Zootaxa, 4446 (1), 051–067. https://doi.org/10.11646/zootaxa.4446.1.4
Cassis, G. & Gross, G.F. (2002) Hemiptera: Heteroptera (Pentatomomorpha). In: Houston, W.W.K. & Wells, A. (Eds.), Zoological Catalogue of Australia. Vol 27.3B. CSIRO Publishing, Melbourne, pp. i–xiv + 1–737.
Dellapé, P.M. & Henry, T.J. (2021) Lygaeoidea Species File. Version 5.0/5.0. Available from: http://Lygaeoidea.SpeciesFile.org (accessed 1 January 2021)
Distant, W.L. (1901) Rhynchotal notes. XI. Heteroptera: Fam. Lygaeidae. Annals and Magazine of Natural History, Series 7, 8, 47 & 48, 464–486 & 497–510. https://doi.org/10.1080/03745480109443351
Distant, W. L. (1903) On some undescribed Rhynchota. Annals and Magazine of Natural History, Series 7, 11, 72–77. https://doi.org/10.1080/00222930308678726
Distant, W. L. (1918) LII. – Contributions to a further knowledge of the Rhynchotal family Lygaeidae. Annals and Magazine of Natural History, Series 9, 2, 486–492. https://doi.org/10.1080/00222931808673793
Fabricius, J.C. (1775) Systema entomologiae. Korte, Flensburgi and Lipsiae, xxvii + 832 pp.
Henry, T.J. (1997) Phylogenetic analysis of family groups within the infraorder Pentatomomorpha (Hemiptera: Heteroptera), with emphasis on the Lygaeoidea. Annals of the Entomological Society of America, 90 (3), 275–301. https://doi.org/10.1093/aesa/90.3.275
Horváth, G. (1908) Colobathristinae et Heterogastrinae novae in Museo Nationali Hungarico. Annales Musei Nationalis Hungarici, 6, 591–595.
Malipatil, M.B. (1978) Revision of the Myodochini (Hemiptera: Lygaeidae: Rhyparochrominae) of the Australian Region. Australian Journal of Zoology, Supplementary Series, 56, 1–178. https://doi.org/10.1071/AJZS056
Schilling, P.S. (1829) Hemiptera Heteroptera Silesiae systematice disposuit Beiträge zur Entomologie, Besonders in Bezug auf die Schlesische Fauna, Breslau, 1, 34–92, pls. A & I–VIII.
Schuh, R.T. & Weirauch, C. (2020) True bugs of the world (Hemiptera: Heteroptera). Classification and Natural History. Monograph Series Vol. 8. 2nd Edition. Siri Scientific Press, Manchester, 800 pp.
Scudder, G.G.E. (1957) New genera and species of Heterogastrinae (Hemiptera, Lygaeidae), with a revision of the genus Dinomachus. Opuscula Entomologica, 22, 161–183.
Scudder, G.G.E. (1962) New Heterogastrinae (Hemiptera) with a key to the genera of the world. Opuscula Entomologica, 27, 117–127.
Servadei, A. (1951) Nota sull’Heterogaster urticae F. e sul genere Heterogaster Schill. (Hemiptera Heteroptera, Myodochidae). Redia, 36, 171–220.
Slater, J.A. (1964) A catalogue of the Lygaeidae of the world. University of Connecticut, Storrs, Connecticut, 1668 pp.
Stål, C. (1859) Hemiptera species novas descriptsit. Konglika Svenska Fregattens Eugenies resa omkring Jorden, III (Zoologi, Insekter), 219–298.
Walker, F. (1872) Catalogue of the specimens of Hemiptera Heteroptera in the collection of the British Museum. Vol. 5. British Museum Natural History, London, 202 pp.