Hostname: page-component-7bb8b95d7b-dvmhs Total loading time: 0 Render date: 2024-09-28T05:19:51.266Z Has data issue: false hasContentIssue false
  • English
  • Français

The Nature and Significance of the Pedicleforamen of Leptaena Dalman

Published online by Cambridge University Press:  01 May 2009

Muriel A. Arber
Muriel A. Arber
Affiliation:
Sedgwick Museum, Cambridge.
Get access Rights & Permissions [Opens in a new window]

Extract

In the brachiopod family Strophomenidae, it is recognized that various genera, of which Leptaena Dalman is a good example, may possess a foramen enclosed within the umbo of the ventral valve, near the apex of the pseudodeltidium (see Text-fig. 2 A). Such a foramen is presumably a pedicle-aperture, and bears a superficial resemblance to that of certain Telotremata in which the young pedicle emerged through the open delthyrium and subsequently resorbed the apex of the ventral valve and became enclosed dorsally by the deltidial plates. In the young stages of Leptaena, on the other hand, the foramen was entirely supra-apical and enclosed within the ventral protegulum and nepionic shell, though sometimes it later suffered resorption of its dorsal margin so as to become bounded by the pseudodeltidium.

Type
Original Articles
Information
Geological Magazine , Volume 76 , Issue 2 , February 1939 , pp. 82 - 92
Copyright
Copyright © Cambridge University Press 1939

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

LITERATURE CITED

Ashworth, J. H., 1915. “On Larvae of Lingula and Pelagodiscus (Discinisca)”, Trans. Roy. Soc. Edin., li (1917), 45–69, pls. iv–v.Google Scholar
Beecher, C. E., and Clarke, J. M., 1889. “The Development of some Silurian Brachiopoda”, Mem. N.Y. State Mus. Albany, i, no. 1, 95 pp., 8 pls.Google Scholar
Beecher, C. E., 1891. “Development of the Brachiopoda. Part 1: Introduction”. Amer. Journ. Sci., New Haven, 3, lxi, art. xl, 343–357, pl. xvii.CrossRefGoogle Scholar
Beecher, C. E., 1892. “Development of the Brachiopoda. Part II: Classification of the Stages of Growth and Decline”, Amer. Journ. Sci., New Haven, 3, lxiv, art. xix, 133–155, pl. 1.CrossRefGoogle Scholar
Beecher, C. E., 1901. Studies in Evolution. Yale Bicentennial Publications. New York and London. [Contains reprints of the above articles with various modifications.]Google Scholar
Dalman, J. W., 1828. “Uppställning och Beskrifning af de i Sverige funne Terebratuliter”, K. Svenska Vetensk. Akad. Handl., för år 1827, 85–155, pls. i–vi.Google Scholar
Davidson, T., 1848. “Mémoire sur les Brachiopodes du système silurien supérieur d'Angleterre”, Bull. Soc. géol. Fr., 2, v, 309–338, pl. iii.Google Scholar
Davidson, T., 1858–1863. “A Monograph of the British Fossil Brachiopoda. Part V: The Carboniferous Brachiopoda”, Mon. Palaeontogr. Soc., London.Google Scholar
Hall, J., and Clarke, J. M., 1892. “An Introduction to the Study of the Genera of Palaeozoic Brachiopoda”, Palaeont. New York, viii, pt. i.Google Scholar
King, W., 1846. “Remarks on certain Genera belonging to the Class Palliobranchiata”, Ann. Mag. Nat. Hist., xviii, 26–42, 83–94.CrossRefGoogle Scholar
King, W., 1850. “A Monograph of the Permian Fossils of England”, Mon. Palaeontogr. Soc., London.CrossRefGoogle Scholar
Kovalevskii˘, A. O., 1874. [Observations on the Development of Brachiopoda. In Russian.] Īzvyest. Īmp. Obshch. Lyub. Estest. Antrop. Étno., xiv, Moscow, 40 pp., 5 pls.Google Scholar
Analyse: Oehlert, D. P., and Deniker, J., 1883, Arch. Zool. exp. gén., Paris, 2, i, 57–76.Google Scholar
Kozlowski, R., 1929. “Les Brachiopodes gothlandiens de la Podolie Polonaise”, Palaeont. Polonica, Warsaw, 1.Google Scholar
Lacaze-Duthiers, H., 1861. “Histoire naturelle des Brachiopodes vivants de la Mediterranée. Première Monographie. Histoire de la Thécidie (Thecideum mediterraneum)”, Ann. Sci. nat., Paris, 4, zool., xv, 259–330, pls. 1–5.Google Scholar
Obbigny, A. d', 1847. “Sur les Brachiopodes ou Palliobranches. (deuxième Mémoire)”, C.R. Acad. Sci., Paris, 25, 266–9.Google Scholar
Schuchert, C., 1897. “A Synopsis of American Fossil Brachiopoda, including Bibliography and Synonymy”, Bull. U.S. Geol. Surv., no. 87.Google Scholar
Schuchert, C., and Cooper, G. A., 1932. “Brachiopod Genera of the Suborders Orthoidea and Pentameroidea”, Mem. Peabody Mus., Yale, iv, pt. 1.Google Scholar
Sharpe, D., 1848. “Report on the Fossil Remains of MoLlusca from the Palaeozoic Formations of the United States contained in the Collection of Charles Lyell, Esq.; with Remarks on the Comparison of the North American Formations with those of Europe”, Quart. Journ. Geol. Soc., London, iv, 145–181.CrossRefGoogle Scholar
Thomson, J. A., 1927. “Brachiopod Morphology and Genera (Recent and Tertiary)”, Man. N.Z. Sd. Sci. Art, 7.Google Scholar
Verneuil, É. de, 1845, in Murchison R. I., Veeneuil É. de, and Keyserling A. de. Géologie de la, Bussie d'Europe et des Montagnes de l'Oural. Vol. ii: Paléonlologie, London and Paris.Google Scholar
Verneuil, É. de, 1848. “Note sur quelquea Brachiopodes de l'ile de Gothland” and “Note sur quelques espèces de Leptaena à crochet perforé”, Bull. Soc. géol. Fr., 2, v, 339–353, pl. iv.Google Scholar
Wahlenberg, G., 1821. “Petrifacta Telluris Svecanae”, Nova Acta Soc. Sci. Upsala, viii, 1–116, pls. i–iv.Google Scholar
Wilckens, C. F., 1769. Nachricht von seltenen Versteinerungen, vornemlich des Thier-Reiches, Berlin and Stralsund.Google Scholar
Yatsu, N., 1902. “On the Development of Lingula anatina”, Journ. Coll. Sci., Tokyo, xvii (1901–1903), art. 4, 112 pp., 8 pis.Google Scholar