Tornando al quesito iniziale di Mauro, posso contribuire con i PDF di questi lavori:
Amadon, D. (1949), 'The Seventy-Five Per Cent Rule for Subspecies.', The Condor, 51(6): 250-258.
Braby, M. F.; Eastwood, R. & Murray, N. (2012), 'The subspecies concept in butterflies: has its application in taxonomy and conservation biology outlived its usefulness?', Biological Journal of the Linnean Society, 106: 699–716. With 4 figures.
Descimon, H. & Mallet, J.Settele, J., K. M. S. T. D. R. &. V. D. H., ed., (2008), In: Ecology of Butterflies in Europe., Cambridge University Press., chapter Bad species., pp. 1-66.
Mallet, J.Levin, S. e. a. (e., ed., (2007), Encyclopedia of Biodiversity. Volume 5., Academic Press, Elsevier, Oxford., chapter Subspecies, semispecies, superspecies., pp. pp. 523-526.
Mallet, J.; Meyer, A.; Nosil, P. & Feder, J. L. (2009), 'Space, sympatry and speciation.', J Evol Biol., 22(11):2332-2341.
Patten, M. A. (2015), 'Subspecies and the philosophy of science.', The Auk, 132(2):481-485. Rothschild, W. (1912), 'On the term "subspecies" as used in systematic zoology.', Novit. Zool., 19(1): 135-136.
Scott, J. A. (2015), 'Do subspecies exist? Resurrect the subspecies!', News Lep.Soc., 57(2): 86-88.
Wallin, H.; Kvamme, T. & Bergsten, J. (2017), 'To be or not to be a subspecies: description of Saperda populnea lapponica ssp. n. (Coleoptera, Cerambycidae) developing in downy willow (Salix lapponum L.).', ZooKeys, 691: 103–148.
_________________ Maurizio Bollino
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