<Tr> <Td_colspan="2"> <P> Pieris wollastoni Pieris cheiranti wollastoni </P> </Td> </Tr> <P> Pieris wollastoni Pieris cheiranti wollastoni </P> <P> The Madeiran large white (Pieris brassicae wollastoni) is a subspecies of the large white, endemic to Madeira . It can reach a size from 55 to 65 millimetres . The wings are pure white with a wide black tip on the apexes of the forewings . Its natural habitat is the laurisilva laurel forest . Considering that it was last collected in 1977 but not found despite a 15 - year survey during the 1980s and 1990s it might be either extremely rare or possibly extinct . One reason for its decline might be a virus infection which brought out after the small white (Pieris rapae) was introduced to Madeira in the 1950s . The Latin name commemorates Thomas Vernon Wollaston, an entomologist who has discovered several insect taxa on Madeira . </P>

When did the madeiran large white become extinct
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