Hostname: page-component-848d4c4894-pftt2 Total loading time: 0 Render date: 2024-05-20T17:22:42.969Z Has data issue: false hasContentIssue false

III.—Brachiopod Morphology: Types of Folding in the Terebratulacea

Published online by Cambridge University Press:  01 May 2009

Extract

In descriptions of Recent and Tertiary Terebratulids at least, the type of folding is often hardly mentioned, and is left to be inferred from the figure, in spite of the fact that Douvillé in 1879 showed that it might be even of generic importance. Buckman has more recently drawn attention once more to the importance of this character and has shown that its due consideration may lead to fruitful results in classification. The object of this paper is to point out further cases in which it has been neglected.

Type
Original Articles
Copyright
Copyright © Cambridge University Press 1915

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

page 71 note 1 Douvillé, H., “Note sur quelqnes genres de Brachiopodes (Terebratulidæ et Waldhemiidæ)”: Bull. Soc. géol. Fr., ser. iii, tom. vii, pp. 251–77, 1879.Google Scholar

page 71 note 2 Buckman, S. S., “Brachiopod Morphology: Cincta, Eudssia, and the Development of Ribs”: Quart. Journ. Geol. Soc., vol. lxiii, pp. 388–43, 1907.Google Scholar

page 72 note 1 Palœontologica Indica, ser. ix, vol. iii, pt. i, 1910Google Scholar.

page 72 note 2 Apparently in certain species of Terebratulina a retardation of the Cincta type can set in after the shell has assumed an incipient dorsal uniplication.

page 72 note 3 Liothyris, Douvillé, 1879, being preoccupied by Liothyris, Conrad, 1875, the name was changed to Liothyrina by Oehlert in 1887.

page 72 note 4 Antarctic Fossil Brachiopoda, etc.”: Wissensch. Ergebnisse der Schwed. Südpolar Exped., 1901–3, Bd. iii, Lief. vii, pp. 26–7, 1910Google Scholar.

page 73 note 1 “Brachiopod Nomenclature: the Genotype of Terebratula: Ann. Mag. Nat. Hist., ser. vii, vol. ix, pp. 525–31, 1907.Google Scholar

page 73 note 2 See further remarks on this point under the Dallininæ.

page 73 note 3 Ann. Mag. Nat. Hist., ser. iv, vol. xvii, p. 19, pl. ii, figs. 4a–d, 1876.Google Scholar

page 74 note 1 von Ihering, H., Ann. Mus. Nac. Buenos Aires, tom. ii, p. 332, 1903Google Scholar.

page 74 note 2 Apparent exceptions are the New Zealand Tertiary forms Terebratula gaulteri, Morris, and Terebratella sinuata, Hutton, which are dorsally uniplicate, but these have proved to be smooth Rhynchonellids.

page 74 note 3 Beecher, E., “Revision of the Families of the loop-bearing Brachiopoda. The Development of Terebratalia obsoleta, Dall”: Trans. Conn. Acad., vol. ix, pp. 376–99, pls. i and ii, 1893.Google Scholar

page 75 note 1 The hinge - plates of these species appear to be Terebratelliform, and Davidson has stated that the growth stages of T. coreanica resemble those of T. rubicunda. If T. grayi is correctly placed in Magellania, the presence of Terebratellœ in the Northern Pacific is only to be expected.

page 75 note 2 Jackson, J. W., “Brachiopoda of the Scottish National Antarctic Expedition”: Trans. Roy. Soc. Edin., vol. xlviii, pp. 367–90, 1912.CrossRefGoogle Scholar

page 75 note 3 In case Beecher has made any mistake in his identification of this species, with which I am unacquainted, I further desire to define the genotype as the species actually figured by Beecher under the name of T. obsoleta, Dall.

page 76 note 1 Proc. U.S. Nat. Mus., vol. xvii, pp. 724–6, 1895Google Scholar.

page 76 note 2 Originally described by Dall as Frenula jeffreysi, and later by Davidson as Laqueus californicus, var. vancouveriensis. See Dall, loc. cit.

page 76 note 3 These characters are proving of considerable aid in separating different stocks of the Magellaninæ among New Zealand Tertiary shells which have arrived independently at Magellaniform loops.