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Amphicampa (C.G. Ehrenberg) J. Ralfs in A. Pritchard 1861, p. 765
Generitype T: Amphicampa mirabilis Ehrenberg ex Ralfs in Pritchard 1861
Designated by
Year Designated 0
Nomenclatural status valid
Recent revisions
Comments Type by monotypy. Name first introduced in Ehrenberg 1854 (Mikrogeologie, Text, ref. 000300) p. 373, as a subdivision of Eunotia. Two species are illustrated on pl. 33,VII/1,2 (ref. 000966) (as Amphicampa eruca, and Amphicampa mirabilis). Ralfs in Pritchard 1861 (ref. 001063) p. 765 elevated it to genus rank, provided a description of the genus, described A. mirabilis and cited A. eruca as a synonym of A. mirabilis. Ehrenberg 1870 (ref. 000309) p. 43 presents it as a new genus and provides a Latin description; the genus name, however, was already validly published in Ralfs in Pritchards 1861. Farr et al. 1979 (ref. 006663), p. 70, give Amphicampa mirabilis (Ehr.) Ralfs as the holotype. Boyer (1927) (ref. 000155), p. 226 gives Amphicampa eruca (Ehr.) Ralfs as the type.
Published in

Pritchard, A. 1861  (ref. 1063)

A history of infusoria, living and fossil: arranged according to Die infusionsthierchen of C.G. Ehrenberg; containing colored engravings, illustrative of all the genera, and descriptions of all the species in that work, with several new ones; to which is appended an account of those recently discovered in the chalk formations. xii.

Edition IV, revised and enlarged by J.T. Arlidge, W. Archer, J. Ralfs, W.C. Williamson and the author. London, Whittaker and Co., 1861. xiii + 968 pp., 40 pls.


Arthrogyra C.G. Ehrenberg ex Ralfs in Pritchard 1861, p. 822
Generitype T: not designated
Designated by
Year Designated 0
Nomenclatural status valid
Recent revisions
Comments Name first introduced in Ehrenberg 1854 (ref. 000966), where 2 species are illustrated (pl. 33/6, figs. 1,2), Arthrogyra guatimalensis (fig. 1) and Arthrogyra semilunaris (fig. 2). There is no mention that this is a new genus, and no generic description is provided. The name is not validly published here because it is lacking a description while containing more than one species (see ICBN 1994, Art. 41, 42). Genus name also mentioned in Ehrenberg 1854 (ref. 000300) p. 363, no. 803. Ralfs in Pritchard (1861), p. 822, made the following comments: "the characters of this genus are unknown to us; but judging from Ehrenberg's figures of the species, it seems to have been constituted for the reception of those forms of Melosira which, like M. dickiei, produce horizontal, elongated, tapering internal bodies or sporangia." We believe that, despite the negative initial statement, the genus Arthrogyra is accepted by Ralfs and that this paragraph constitutes the validating description.
Published in

Pritchard, A. 1861  (ref. 1063)

A history of infusoria, living and fossil: arranged according to Die infusionsthierchen of C.G. Ehrenberg; containing colored engravings, illustrative of all the genera, and descriptions of all the species in that work, with several new ones; to which is appended an account of those recently discovered in the chalk formations. xii.

Edition IV, revised and enlarged by J.T. Arlidge, W. Archer, J. Ralfs, W.C. Williamson and the author. London, Whittaker and Co., 1861. xiii + 968 pp., 40 pls.


Brightwellia J. Ralfs in A. Pritchard 1861, p. 940
Generitype T: Brightwellia coronata (T. Brightwell) J. Ralfs in A. Pritchard 1861 (= Craspedodiscus coronatus T. Brightwell 1860)
Designated by J. Ralfs in A. Pritchard (001063)
Year Designated 1861
Nomenclatural status valid
Recent revisions Andrews 1984 (ref. 003372)
Comments Type by monotypy.
Published in

Pritchard, A. 1861  (ref. 1063)

A history of infusoria, living and fossil: arranged according to Die infusionsthierchen of C.G. Ehrenberg; containing colored engravings, illustrative of all the genera, and descriptions of all the species in that work, with several new ones; to which is appended an account of those recently discovered in the chalk formations. xii.

Edition IV, revised and enlarged by J.T. Arlidge, W. Archer, J. Ralfs, W.C. Williamson and the author. London, Whittaker and Co., 1861. xiii + 968 pp., 40 pls.


Dimeregramma J. Ralfs in A. Pritchard 1861, pg. 790
Generitype LT: Dimeregramma minor (W. Gregory) J. Ralfs in A. Pritchard 1861 (= Denticula minor Gregory 1857)
Designated by Boyer, C.S.(000155), p. 192
Year Designated 1927
Nomenclatural status valid
Recent revisions
Comments This name is often misspelled Dimerogramma, Dimerograma or Dimmerogramma. Eighteen species presented in Ralfs in Pritchard (D. minor is the first of the list), no type originally designated.
Published in

Pritchard, A. 1861  (ref. 1063)

A history of infusoria, living and fossil: arranged according to Die infusionsthierchen of C.G. Ehrenberg; containing colored engravings, illustrative of all the genera, and descriptions of all the species in that work, with several new ones; to which is appended an account of those recently discovered in the chalk formations. xii.

Edition IV, revised and enlarged by J.T. Arlidge, W. Archer, J. Ralfs, W.C. Williamson and the author. London, Whittaker and Co., 1861. xiii + 968 pp., 40 pls.


Donkinia J. Ralfs in A. Pritchard 1861, pg. 920
Generitype LT: Donkinia carinata (A. Donkin 1858) J. Ralfs in A. Pritchard 1861 (=Pleurosigma carinatum A. Donkin 1858)
Designated by E.R. Cox (Bot. Mar.26), p. 573 (ref. 006901)
Year Designated 1983
Nomenclatural status valid
Recent revisions Cox 1983 (006901 and 006900)
Comments 7 species originally included, no type designated.
Published in

Pritchard, A. 1861  (ref. 1063)

A history of infusoria, living and fossil: arranged according to Die infusionsthierchen of C.G. Ehrenberg; containing colored engravings, illustrative of all the genera, and descriptions of all the species in that work, with several new ones; to which is appended an account of those recently discovered in the chalk formations. xii.

Edition IV, revised and enlarged by J.T. Arlidge, W. Archer, J. Ralfs, W.C. Williamson and the author. London, Whittaker and Co., 1861. xiii + 968 pp., 40 pls.


Euodia J.W. Bailey ex J. Ralfs in A. Pritchard 1861, pg. 852
Generitype T: Euodia gibba J.W. Bailey ex J. Ralfs in A. Pritchard
Designated by Bailey, J.W. ex Ralfs in Pritchard (001063)
Year Designated 1861
Nomenclatural status valid
Recent revisions
Comments Type originally indicated (second species questionably included). Comments: Later homonym of Euodia J.R. et J.G.A. Forster, 1776. Introduced as "Euodia, n.g. (Bailey, MS.)", two species originally included, E. gibba (Bai. MS.) Ralfs in Pr., E? brightwelli R. in Pr. Simonsen 1987 (ref. 003164), p. 263 noted that Euodia Bailey ex Ralfs in Prit. is a synonym of Hemidiscus Wallich.
Published in

Pritchard, A. 1861  (ref. 1063)

A history of infusoria, living and fossil: arranged according to Die infusionsthierchen of C.G. Ehrenberg; containing colored engravings, illustrative of all the genera, and descriptions of all the species in that work, with several new ones; to which is appended an account of those recently discovered in the chalk formations. xii.

Edition IV, revised and enlarged by J.T. Arlidge, W. Archer, J. Ralfs, W.C. Williamson and the author. London, Whittaker and Co., 1861. xiii + 968 pp., 40 pls.


Excentron J. Ralfs in A. Pritchard 1861, pg. 837
Generitype T: Excentron cancroides J. Ralfs in lit., J. Ralfs in A. Pritchard 1861
Designated by Ralfs in lit., Ralfs in Pritchard (001063)
Year Designated 1861
Nomenclatural status invalid
Recent revisions
Comments Name introduced in Ralfs in Pritchard p. 837 in the paragraph about Asteromphalus arachne, as a synonym of A. arachne: "Excentron cancroides, Ralfs in lit. (v.66)". We do not know of that publication or manuscript. Not validly published by Ralfs because not accepted by this author.
Published in

Pritchard, A. 1861  (ref. 1063)

A history of infusoria, living and fossil: arranged according to Die infusionsthierchen of C.G. Ehrenberg; containing colored engravings, illustrative of all the genera, and descriptions of all the species in that work, with several new ones; to which is appended an account of those recently discovered in the chalk formations. xii.

Edition IV, revised and enlarged by J.T. Arlidge, W. Archer, J. Ralfs, W.C. Williamson and the author. London, Whittaker and Co., 1861. xiii + 968 pp., 40 pls.


Porpeia J.W. Bailey ex J. Ralfs in A. Pritchard 1861, pg. 850
Generitype T: Porpeia quadriceps J.W. Bailey ex J. Ralfs in A. Pritchard 1861
Designated by Bailey ex Ralfs in Pritchard (001063)
Year Designated 1861
Nomenclatural status valid
Recent revisions
Comments Introduced as Porpeia (Bailey, MS.). Type by monotypy.
Published in

Pritchard, A. 1861  (ref. 1063)

A history of infusoria, living and fossil: arranged according to Die infusionsthierchen of C.G. Ehrenberg; containing colored engravings, illustrative of all the genera, and descriptions of all the species in that work, with several new ones; to which is appended an account of those recently discovered in the chalk formations. xii.

Edition IV, revised and enlarged by J.T. Arlidge, W. Archer, J. Ralfs, W.C. Williamson and the author. London, Whittaker and Co., 1861. xiii + 968 pp., 40 pls.

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