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I.—Lophophyllum and Cyathaxonia: Revision Notes on two genera of Carboniferous Corals1

Published online by Cambridge University Press:  01 May 2009

R. G. Carruthers
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Extract

Three years ago when I was discussing certain Carboniferous Corals from Arctic regions the opinion was expressed that the genus Lophophyllum of Milne-Edwards & Haime had been erroneously interpreted by palæontologists, and that in reality it included Thomson and Nicholson's well-known genus Koninckophyllum The main object of the present communication is to substantiate this view with illustrative sections from topotypes, accompanied by some further observations on the genus. At the same time the opportunity is taken to deal with several points in the morphology of the similar genus Cyathaxonia; in the latter case the work is in the nature of a preliminary note rather than of a formal revision. Pending the appearance of a general memoir on the British Carboniferous Corals, it seems desirable that these notes should be published without further delay, as all these genera are commonly met with in zonal work. Most of the material has come either from the Geological Survey Collection or is in my own possession, but Dr. Vaughan has always been very helpful, while I have to thank Dr. T. F. Sibly for some unusually fine examples of Cyathaxonia from Matlock. Other specimens of this genus, from Yorkshire, have very kindly been sent to me from time to time by Dr. A. Wilmore, often at some personal inconvenience.

Type
Original Articles
Information
Geological Magazine , Volume 10 , Issue 2 , February 1913 , pp. 49 - 56
Copyright
Copyright © Cambridge University Press 1913

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Footnotes

1

Communicated by permission of the Director of the Geological Survey of Great Britain.

References

page 49 note 2 “A Carboniferous Fauna from Nowaja Zemlja,” by Lee, G. W., D.Sc, with notes on the Corals by Carruthers, R. G.: Trans. Boy. Soc. Edin., vol. xlvii, pt. i (No. 7), p. 152, 1909.Google Scholar

page 49 note 3 Loc. cit., p. 349Google Scholar, pl. iii, figs. 4, 4a.

page 50 note 1 Michelin, , Iconographie Zoophytologique, p. 258, pl. lix, fig 8.Google Scholar

page 51 note 1 A parallel instance has been fully described and illustrated in Caninia cornucopiœ, see this Magazine, Dec. V, Vol. V, p. 165, Diagram F, 1908.Google Scholar

page 51 note 2 The Tournai region has been treated in detail in a valuable and comprehensive stratigraphical study of the Lower Carboniferous rocks of Belgium and their relationship to British areas. See Delépine, M., Recherches sur le Calcaire Carbonifère de la, Belgique, pp. 214–41, Lille, 1911.Google Scholar

page 52 note 1 Trans. Geol. Soc. Glasgow, vol. xiv, pt. ii, p. 151, 1911Google Scholar. In the lists appended to this paper most of the corals have been named by Mr. Smith himself.

page 52 note 2 Proo. Yorks Geol. Soc, vol. xvi, pt. ii, p. 150, 1907.Google Scholar

page 52 note 3 Ann. Mag. Nat. Hist., vol. i, p. 297, 1876.Google Scholar

page 53 note 1 Thomson was mistaken in his conception of this genus, which was distinctly stated by Nicholson to have no columella. Good figures of the genotype, A. oneidense (Billings), are given by Lambe in Contrib. to Canadian Pal., vol. iv, pt. i, pl. xvi, figs. 1, 2, 1899.Google Scholar

page 53 note 2 No genotype was given by Michelin; Milne-Edwards and Haime selected C. cornu, and their example is here followed, for reasons which will be explained in detail elsewhere. This course does no injustice to Michelin: whereas a rigid interpretation of the law would necessitate a radical change in the long-established conception of Cyathaxonia, and this for purely academic reasons.

page 54 note 1 The primary septation of Cyathaxonia cornu forms the basis of a paper by Faurot, M. (“Affinités des Tétracoralliaires et des Hexacoralliaires”: Annales de Paléontologie, tom, iv, 1909).Google Scholar This important communication deserves separate treatment, and is therefore only referred to here.

page 56 note 1 Lee, & Carruthers, , loc. cit., p. 150, pl. i, figs. 3–6Google Scholar.

page 56 note 2 “The Carboniferous Succession at Loughshinny”: Q.J.G.S., vol. lxiv, p. 460, 1908Google Scholar.