Analysis of information sources in references of the Wikipedia article "Cyaniris semiargus" in English language version.
Cyaniris semiargus (Mazarine Blue - extinct, now occasionally adventive)
Locality: Morocco Sub Species: maroccana
first mentioned as British in 1710 and there are several hundred sightings recorded up until the late 19th century. Various dates are given for the last sighting, although all are linked with a particular region. The end of the 19th century seems to mark a watershed, after which there are very few records.
four species have become extinct [in Britain] (i.e. Lycaena dispar 1851, Cyaniris semiargus 1877, Aporia crataegi c. 1925, Maculinea arion 1979).
