|Catalogue of Diatom Names, On-Line Version, Updated 19 Sep 2011|
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|Perithyra C.G. Ehrenberg ex H. Van Heurck 1896, p. 492|
|Generitype||LT: Perithyra denaria C.G. Ehrenberg ex Van Heurck 1896|
|Designated by||Round, Crawford & Mann (1990), p. 697 (ref. 003245).|
|Comments||Illustrated in Ehrenberg 1854 (ref. 000966), plate 35A, figure IX/5 (P. denaria) and IX/6 (P. quaternaria). No generitype was designated by Ehrenberg. This genus name is not validly published in Ehrenberg (1854) because more than one species are included and no generic description is given. Ehrenberg 1854, on plate caption for pl. 35A/IX, refers to "Monatsberichte der Berliner Akademie der Wissenschaften 1845 S.311. 1846 S.278. Text S.123-134". These articles were not consulted by us. Van Heurck illustrates P. denaria, gives a description of the genus and says: "This genus, which appears rather doubtful, includes, according to Ehrenberg, two forms, P. denaria Ehr. and P. quaternaria Ehr., which only differs in having four tubercules. These forms are found in the Ganges. For anything I know, they have never been seen by anyone but Ehrenberg". No type is indicated by Van Heurck. Farr et al. 1979 indicate the type as "not designated", Round, Crawford & Mann (1990) give P. denaria as the type.|
Van Heurck, H. 1896 (ref. 897)
A Treatise on the Diatomaceae. Translated by W.E. Baxter.
William Wesley & Son, London. 558 pp., 35 pls.