Hostname: page-component-cd9895bd7-8ctnn Total loading time: 0 Render date: 2024-12-24T07:44:38.608Z Has data issue: false hasContentIssue false
  • English
  • Français

IV.—On the New Brachiopod Genus, Liothyrella, of Thomson

Published online by Cambridge University Press:  01 May 2009

J. Wilfrid Jackson
J. Wilfrid Jackson
Affiliation:
Assistant Keeper, Manchester Museum.
Get access Rights & Permissions [Opens in a new window]

Extract

The new genus, Liothyrella, has recently been created by Dr. J. Allan Thomson for the reception of a series of recent and fossil Terebratulids commonly ascribed to the genus Liothyrina. The chief characters upon which the genus is founded are the presence of fine radial ribbing on the surface of the shells and the possession of a short, low, thin, mesial septum in the dorsal valve. In the thickness of the shell, Liothyrella is said to stand between Liothyrina (genotype L. vitrea) and Terebratula, sensu str., all three genera being finely punctate. Thomson takes the; recent Magellanic species L. uva (Brod.) as the genotype of Liothyrella, and includes in the same genus L. uva, var. notorcadensis, Jackson, from Scotia Bay, South Orkneys, and a new species dredged off Tasmania by the Mawson Expedition, as well as two Australian Tertiary species, Terebratula tateana, Tenison-Woods, and T. concentrica (Hutton). He remarks that “probably also many of the other southern species ascribed to Liothyrina will be included here, but the descriptions do not state whether or not a mesial septum is present” (op. cit., p. 44).

Type
Original Articles
Information
Geological Magazine , Volume 5 , Issue 2 , February 1918 , pp. 73 - 79
Copyright
Copyright © Cambridge University Press 1918

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 73 note 1 Jukes-Browne, A. J., Geology of South-West Lincolnshire (Mem. Geol. Surv.), 1885, p. 32Google Scholar.

page 73 note 2 Dalton, W. H., Geology of Lincoln (Mem. Geol. Surv.), 1888, p. 21Google Scholar.

page 73 note 3 Trans. N. Zeal. Inst., vol. xlviii (1915), p. 44, 1916Google Scholar.

page 73 note 4 Jackson, , “The Brachiopoda of the Scottish National Antarctic Expedition.”: Trans. Roy. Soc. Edin., vol. xlviii, pt. ii (No. 19), p. 375, pl. i, figs. 1–3, 1912Google Scholar.

page 74 note 1 Exped. Scient. du “Travailleur et du Talisman, 1880–3”: Brachiopodes, Paris, 1891, pp. 51, 57Google Scholar.

page 74 note 2 “A Monograph of Recent Brachiopoda,.” pt. i: Trans. Linn. Soc., ser. II, Zool., vol. iv, pt. i, pl. ii, figs. 19–19b, 1886Google Scholar.

page 74 note 3 “Zur Systematik und geographischen Verbreitung der Brachiopoden.”: Zeit. für wissen. Zool., Bd. xe, pl. xxxviii, figs. 21–21c, 1908Google Scholar.

page 74 note 4 Jackson, , op. cit., pp. 375, 378Google Scholar.

page 75 note 1 Blochmann, , “Some Australian Brachiopods.”: Papers and Proc. Roy. Soc. Tasm. for 1913 (1914), pp. 112, etcGoogle Scholar.

page 76 note 1 Monog. Brit. Cret. Brach. (Pal. Soc.), 1854, pl. v, figs. 13–16Google Scholar.

page 76 note 2 For a good figure of the cardinalia, see Davidson, , Monog. Brit. Tert. Brach. (Pal. Soc.), 1852, pl. ii, fig. 3Google Scholar.

page 77 note 1 Monog. Brit. Cret. Brach. (Pal. Soc.), 1854, pl. viii, figs. 2, 2aGoogle Scholar.

page 77 note 2 Petrefactenkunde Deutsch., II, Brachiopoden, Leipzig, 1871, pl. xlviii, fig. 42Google Scholar.

page 77 note 3 This is based upon the figure given by Davidson, , Suppl. Tert. Brach. (Pal. Soc.), 1874, pl. ii, fig 1, and upon imperfect specimens of my ownGoogle Scholar.

page 77 note 4 The ovate outline and broad dorsal uniplication of the Crag shells also show greater affinity with L. uva.

page 78 note 1 See Blochmann, , op. cit., 1908, pl. xxxix; also Fischer & Oehlert, op. cit., 1891, pl. iii (for L. vitrea and L. sphenoidea)Google Scholar.

page 78 note 2 See Blochmann, , op. cit., 1908, pl. xxxix, fig. 26; and Blochmann, op. cit., 1914, pl. x, figs. 5, 6Google Scholar.

page 78 note 3 See Blochmann, , Wissen. Ergeb. der Schwed. S.-P. Exped., 1901–3, Bd. vi, Lief. vii, pl. i, fig. 14, 1912Google Scholar.

page 78 note 4 Compare Jackson, op. cit., 1912, pl. i, fig. 6, with Blochmann, op. cit., 1908, pl. xxxix, fig. 23aGoogle Scholar.