Hostname: page-component-6bf8c574d5-j5c6p Total loading time: 0 Render date: 2025-03-04T04:52:35.540Z Has data issue: false hasContentIssue false
  • English
  • Français

An unusual new lepidopleurid polyplacophoran (Mollusca) from the Germanic Muschelkalk (Triassic)

Published online by Cambridge University Press:  14 July 2015

Gerd Geyer  and
Peter A. Kukla
Gerd Geyer
Affiliation:
Institut für Paläontologie, Pleicherwall 1, D-8700 Würzburg, FRG
Peter A. Kukla
Affiliation:
Institut für Mineralogie, Am Hubland, D-8700 Würzburg, FRG
Get access Rights & Permissions [Opens in a new window]

Abstract

A fragmentary and probably immature polyplacophoran shell from the Middle Triassic Germanic Muschelkalk is presented. Morphological peculiarities of the specimen are a stiff connection of the head valve to the adjoining intermediate valve and the presence of a yet undescribed brim-like shell constituent, informally called border-plate herein. The unusually well-preserved shell structure is discussed in detail comprising tegmentum, crossed-lamellar p. hypostracum and the (articulamental?) border-plate. Characteristics indicate a systematic position within the order Lepidopleurina.

Type
Research Article
Information
Journal of Paleontology , Volume 64 , Issue 2 , March 1990 , pp. 222 - 228
Copyright
Copyright © The Paleontological Society 

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

Beedham, G. E., and Trueman, E. R. 1967. The relationship of the mantle and shell of the Polyplacophora in comparison with that of other Mollusca. Journal of Zoology, 151:215–231.Google Scholar
Bergenhayn, J. R. M. 1930. Kurze Bemerkungen zur Kenntnis der Schalenstruktur und Systematik der Lorikaten. Kungliga Svenska Vetenskapsakademiens Handlingar, (3), 9:1–54.Google Scholar
Bergenhayn, J. R. M. 1955. Die fossilen schwedischen Loricaten nebst einer vorläufigen Revision des Systems der ganzen Klasse Loricata. Lunds Universitets Årsskrift N. F. 2, 51. Kungliga Fysiografiska Sällskapets Handlingar, N. F. 66:1–41.Google Scholar
B⊘ggild, O. B. 1930. The shell structure of the Mollusks. Kongelike Danske Videnskabernes Selskab Skrifter, Naturvidensk. og Matematiska Afdeling, (9), II:231–325.Google Scholar
Dall, W. H. 1889. A preliminary catalogue of the shell-bearing marine mollusks and brachiopods of the southeastern coast of the United States, with illustration of many of the species. U.S. National Museum Bulletin 37, 221 p.Google Scholar
DeBrock, M. D., Hoare, R. D., and Mapes, R. H. 1984. Pennsylvanian (Desmoinian) Polyplacophora (Mollusca) from Texas. Journal of Paleontology, 58:1117–1135.Google Scholar
Haas, W. 1972. Untersuchungen über die Mikro- und Ultrastruktur der Polyplacophorenschale. Biomineralisation, 5, Akademie der Wissenschaften und der Literatur, Mainz, 52 p.Google Scholar
Hammarsten, O. D., and Runnström, J. 1926. Zur Embryologie von Acanthochiton discrepans Brown. Zoologisches Jahrbuch. Abteilung Anatomie und Ontogenie der Tiere, 47:261–318.Google Scholar
Hoare, R. D., and Mapes, R. H. 1985a. New Mississippian and Pennsylvanian Polyplacophora (Mollusca) from North America. Journal of Paleontology, 59:875–881.Google Scholar
Hoare, R. D., and Mapes, R. H. 1985b. A new species of Pennsylvanian Polyplacophora (Mollusca) from Texas. Journal of Paleontology, 59:1324–1326.Google Scholar
Hoare, R. D., and Mapes, R. H. 1986. The polyplacophoran “Chiton“ carbonarius Stevens, 1858, in North America and new related species. Journal of Paleontology, 60:627–635.Google Scholar
Hoare, R. D., and Smith, A. G. 1984. Permian Polyplacophora (Mollusca) from West Texas. Journal of Paleontology, 58:82–103.Google Scholar
Jaekel, O. 1900. Ueber einen neuen Chitoniden, Trachypleura n. g., aus dem Muschelkalk von Rüdersdorf. Zeitschrift der deutschen geologischen Gesellschaft, 52, Verhandlungen, p. 9–14.Google Scholar
Kaas, P., and Van Belle, R. A. 1985. Monograph of Living Chitons (Mollusca: Polyplacophora). Volume 1. Order Neoloricata: Lepidopleurina. Brill/Backhuys, Leiden, London, Köln, Kopenhagen, 240 p.CrossRefGoogle Scholar
Knorre, H. v. 1925. Die Schale und die Rückensinnesorgane von Trachydermon (Chiton) cinereus L. und die ceylonesischen Chitonen der Sammlung Plate. (Fauna et Anatomia ceylanica, III, Nr. 3.). Jenaische Zeitschrift für Naturwissenschaften, 61, N. F. 54:469–632.Google Scholar
Kukla, P. 1986. Erweiterte Erläuterungen zu einer geologischen Kartierung auf dem Blatt 5925 Gauaschach (NE-Quadrant) der topographischen Karte 1:25000. Unpubl. Diplom-Arbeit, Geologisches Institut der Universität Würzburg, 185 p.Google Scholar
Laghi, G. F. 1982. Crenatolorica zardinii n. gen., n. sp. of polyplacophoran from St. Cassian Beds (Dolomites, Italy). Bollettino della Società Paleontologica Italiana, 20 [1981]:155–158.Google Scholar
Pilsbry, H. A. 1892. Monograph of the Polyplacophora. Manual of Conchology, 14, Philadelphia, 350 p.Google Scholar
Plate, L. H. 1901. Die Anatomie und Phylogenie der Chitonen (Fortsetzung). Zoologisches Jahrbuch Supplement-Band V. Fauna Chilensis, 2 (2):281–600.Google Scholar