@inbook{54e4957fb18846a88a75cece81ab2a1f,
title = "Late Tertiary Azolla species from R{\o}m{\o}, SW Denmark",
abstract = "Megaspores of the genus Azolla (Salviniaceae) from probably Late Upper Miocene strata at R{\o}m{\o}, SW Denmark, have been studied by means of scanning electron microscopy. Four species are recognized: Azolla roemoeensis n. sp. a form with nine floats, A. tomentosa Nikitin ex Dorofeev, previously recorded from the Oligocene and the Miocene in Eurasia, and two species of uncertain affinity, which are described with open nomenclature. Closely related species seem to have the same type of perine structure. Future SEM analysis of the perine structure may lead to formation of new subgeneric groups within the 'sections'. ",
author = "Finn Bertelsen",
year = "1974",
month = nov,
day = "1",
doi = "10.22008/gpub/38229",
language = "English",
volume = "1973",
series = "DGU {\AA}rbog",
publisher = "DGU",
pages = "15--25",
booktitle = "DGU {\AA}rbog 1973",
}