Soares, A.O. & Borges, I. (2023) Novius cardinalis (Mulsant, 1850). Guia Prático da Fauna Terrestre dos Açores (ed. by R. Gabriel and P.A.V. Borges), 190-191. 2nd edition. Instituto Açoreano da Cultura, Angra do Heroísmo. ISBN:978-989-8225-82-5
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António Onofre Costa Miranda Soares Island Biodiversity, Biogeography & Conservation - IBBC