Early ontogeny of the Furongian (Cambrian) olenid trilobites Sphaerophthalmus alatus (Boeck, 1838) and Ctenopyge (Mesoctenopyge) tumida Westergård, 1922 from Bornholm, Denmark

Forskningsoutput: TidskriftsbidragArtikel i vetenskaplig tidskrift

Abstract

The early stages in ontogenetic development are described in the co-occurring Sphaerophthalmus alatus (Boeck, 1838) and Ctenopyge (Mesoctenopyge) tumida Westergård, 1922, using fragmentary but otherwise well-preserved material from Bornholm, Denmark. The former species is a senior synonym of Ctenopyge (Eoctenopyge) angusta Westergård, 1922, as has been recently proposed, but the early stages of S. alatus from Bornholm are appreciably more spiny than those found of the same species in other places in Scandinavia, and spinosity is retained until later in development. Increasing convexity with development and other morphological changes are noted. Pygidia were previously unknown in C. (M.) tumida. Here, they are represented by early pygidia. These are shield-shaped, with a very spiny margin and a strong axial spine. The distinction between Sphaerophthalmus and Ctenopyge is discussed.

Detaljer

Författare
  • Kristina Månsson
  • Euan N K Clarkson
Enheter & grupper
Externa organisationer
  • University of Edinburgh
Forskningsområden

Ämnesklassifikation (UKÄ) – OBLIGATORISK

  • Geologi

Nyckelord

Originalspråkengelska
Sidor (från-till)171-183
Antal sidor13
TidskriftEarth and Environmental Science Transactions of the Royal Society of Edinburgh
Volym106
Utgivningsnummer3
StatusPublished - 2016 nov
PublikationskategoriForskning
Peer review utfördJa