Orvo Vitikainen (born 11 October 1940 in Taipalsaari) [1] is a Finnish lichenologist. He entered the University of Helsinki in 1961, from where he obtained a Candidate of Philosophy degree in 1966, and a Licentiate of Philosophy in 1971. He later earned a Ph.D. from this institution in 1994, under the supervision of Teuvo Ahti. Between the years 1961 and 1981 he was a junior curator of cryptogams at the University of Helsinki Botanical Garden, and then from 1983 to 2004 he was the head of the lichen herbarium. [2] Here he managed the internationally valuable collections of the early lichenologists Erik Acharius and William Nylander. He has collected thousands of specimens for the herbarium from various locations in Finland, but also internationally, including Sweden, Norway, Denmark, Russian Karelia, Scotland, Austria, Italy, Hungary, Croatia, Montenegro, Tanzania, Kenya, British Columbia, and Brazil. [1] In 1992–1994, he was a scientist of the Finnish Academy in the Ahti research group. [2]
Vitikainen is an expert on the lichen flora of Finland and northwest Europe, and also a specialist on the lichen genus Peltigera . He contributed chapters on the families Peltigeraceae and Nephromataceae for the popular 2007 work Nordic Lichen Flora. [2] He is also interested in the history of lichenology and has published several papers in this area. [1] Vitikainen is honoured in the names of the lichens Atla vitikainenii , [2] Nephroma orvoi , [3] and Verrucaria vitikainenii . [4] He is described by his colleagues as "a modest, patient, friendly and industrious colleague", and "an important joint in the great chain of lichenological tradition in Finland". [1]
The Cladoniaceae are a family of lichenized fungi in the order Lecanorales. It is one of the largest families of lichen-forming fungi, with about 560 species distributed amongst 17 genera. The reindeer moss and cup lichens (Cladonia) belong to this family. The latter genus, which comprises about 500 species, forms a major part of the diet of large mammals in taiga and tundra ecosystems. Many Cladoniaceae lichens grow on soil, but other can use decaying wood, tree trunks, and, in a few instances, rocks as their substrate. They grow in places with high humidity, and cannot tolerate aridity.
Peltigera is a genus of approximately 100 species of foliose lichens in the family Peltigeraceae. Commonly known as the dog or pelt lichens, species of Peltigera are often terricolous, but can also occur on moss, trees, rocks, and many other substrates in many parts of the world.
William (Wilhem) Nylander was a Finnish botanist and entomologist. Nylander was born in Oulu, and taught at the University of Helsinki before moving to Paris, where he lived until his death in 1899.
Allocetraria is a genus of lichenized fungi in the family Parmeliaceae. It consists of 12 species, with a center of distribution in China.
Edvard August Vainio was a Finnish lichenologist. His early works on the lichens of Lapland, his three-volume monograph on the lichen genus Cladonia, and, in particular, his study of the classification and form and structure of lichens in Brazil, made Vainio renowned internationally in the field of lichenology.
Teuvo ("Ted") Tapio Ahti is a Finnish botanist and lichenologist. He has had a long career at the University of Helsinki that started in 1963, and then following his retirement in 1997, at the Botanical Museum of the Finnish Museum of Natural History. Known as a specialist of the lichen family Cladoniaceae, Ahti has published more than 280 scientific publications. A Festschrift was dedicated to him in 1994, and in 2000 he was awarded the prestigious Acharius Medal for lifetime contributions to lichenology.
Cladonia wainioi or the Wainio's cup lichen is a species of cup lichen found in boreal and arctic regions of the Russian Far East and northern North America.
Rainar Alarik Hakulinen was a Finnish lichenologist and schoolteacher. He was noted as an expert on the lichen family Candelariaceae, and was known for his numerous phytogeographical publications about the boreal and arctic lichens of Finland, Northern Norway, and Russian Karelia.
Veli Johannes Paavo Bartholomeus Räsänen was a Finnish lichenologist.
Johan Petter Norrlin was a Finnish botanist and a professor of botany at the University of Helsinki from 1879 to 1903. He was a pioneer of plant geography in Finland, and is also well known for his work on lichens and on the taxonomy of the apomictic taxa of the plant genera Hieracium and Pilosella.
Peltigera papuana is a lichenized fungus in the family Peltigeraceae. It was described in 2009 from Madang Province of Papua New Guinea, from which it obtained its specific epithet. Genetic analysis of both the mycobiont and the photobiont, which is a Nostoc cyanobacterium, suggests that the evolutionary origin of Pelitgera papuana is from an ancient dispersal event from South America, although this remains inconclusive.
Peltigera wulingensis is a species of terricolous (ground-dwelling), foliose lichen in the family Peltigeraceae. Originally described from specimens found in northern China, it has since been recorded in Canada, Norway, and Russia.
Atla vitikainenii is a species of saxicolous (rock-dwelling) in the family Verrucariaceae. Found in northern Finland, it was formally described as a new species in 2016 by Juha Pykälä and Leena Myllys. The type specimen was collected by the first author from Oulanka National Park, at an altitude of 185 m (607 ft); there, it was found growing on pebbles in a northeast-facing dolomite rock outcrop. The species epithet honours Finnish lichenologist Orvo Vitikainen, who, according to the authors, "has contributed in many ways to our knowledge of the taxonomy, ecology and biogeography of Finnish lichens".
Verrucaria vitikainenii is a species of saxicolous (rock-dwelling) crustose lichen in the family Verrucariaceae. It is found in Finland, where it occurs on calcareous rock outcrops.
Verrucaria oulankaensis is a rare species of saxicolous (rock-dwelling) crustose lichen in the family Verrucariaceae. It is found in north-eastern Finland, where it occurs on calcareous rocks on river shores.
Verrucaria ahtii is a species of saxicolous (rock-dwelling) crustose lichen in the family Verrucariaceae. It is found in Finland, Lithuania, Russia, and Switzerland, where it occurs on calcareous pebbles.
Peltigera weberi is a rare species of foliose lichen in the family Peltigeraceae. It is found in Papua New Guinea, where it grows on road banks and on earth and rock debris.
Leproplaca chrysodeta is a species of saxicolous (rock-dwelling) dust lichen in the family Teloschistaceae. It is found in Europe, the Middle East, and New Zealand.
Schaereria serenior is a species of saxicolous (bark-dwelling), crustose lichen in the family Schaereriaceae. Found in Finland, it was first formally described as a new species by the Finnish lichenologist Edvard August Vainio, who classified it as a variety of the species Lecidea tenebrosa. Auguste-Marie Hue promoted it to distinct species status in 1913 as Lecidea serenior. Alexander Zahlbruckner proposed to transfer it to the genus Caloplaca in 1931. Most recently, Orvo Vitikainen transferred it to Schaereria in 2004, a few years after that genus had been resurrected from a long period of disuse. It is one of two species of Schaereria found in Finland; the other is S. parasemella.