Publication
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Frustrating facts about area cladistics and species individuality Article
Bijdragen tot de dierkunde, 60(3/4), 151-154.January 1990
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Review Article
Blumea: Biodiversity, Evolution and Biogeography of Plants, 35(1), 216-216.January 1990
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Notes on the Astronieae (Melastomataceae) — I. Astrocalyx, Astronia Article
Blumea: Biodiversity, Evolution and Biogeography of Plants, 35(1), 71-114.January 1990
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Notes on the Astronieae (Melastomataceae) — II. Astronidium, Beccarianthus Article
Blumea: Biodiversity, Evolution and Biogeography of Plants, 35(1), 115-164.January 1990
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Studies on the tribe Saccopetaleae (Annonaceae) — III Revision of the genus Mezzettia Beccari Article
Blumea: Biodiversity, Evolution and Biogeography of Plants, 35(1), 217-228.January 1990
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Sporogenesis in Polypodiaceae (Filicales). I. Drynaria sparsisora (Desv.) Moore Article
Blumea: Biodiversity, Evolution and Biogeography of Plants, 35(1), 177-215.January 1990
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Lithoxus stocki, a species new to science of ancistrin loricariid catfish from the Maroni River drainage, with a comparison of the primary type specimens of the six species of Lithoxus (syn.: Paralithoxus) (Pisces, Siluriformes, Loricariidae) Article
Bijdragen tot de dierkunde, 60(3/4), 327-333.January 1990
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A review of the parasitic mite family Psorergatidae (Cheyletoidea: Prostigmata: Acari) with hypotheses on the phylogenetic relationships of species and species groups Article
Zoologische Verhandelingen, 259(1), 1-69.January 1990