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The ontogeny of Ellipsocephalus (Trilobita) and systematic position of Ellipsocephalidae

Laibl, Lukas; Fatka, Oldrich; Budil, Petr; Ahlberg, Per LU ; Szabad, Michal; Vokac, Vaclav and Kozak, Vladislav (2015) In Alcheringa 39(4). p.477-487
Abstract
Laibl, L., Fatka, O., Budil, P., Ahlberg, P., Szabad, M., Voka, V. & Kozak, V., 24.3.2015. The ontogeny of Ellipsocephalus (Trilobita) and systematic position of Ellipsocephalidae. Alcheringa 39, 477-487. ISSN 0311-5518.Well-preserved early holaspid stages of the Cambrian Series 3 trilobites Ellipsocephalus hoffi (Schlotheim, 1823) and Ellipsocephalus polytomus Linnarsson, 1877 have been discovered in the Pibram-Jince Basin (Czech Republic) and Jamtland (Sweden), respectively. Both species show remarkable morphological changes during late ontogeny. The earliest holaspides share long genal spines, and long macrospines on the second thoracic segment. Whereas macrospines disappear abruptly in later stages, genal spines are progressively... (More)
Laibl, L., Fatka, O., Budil, P., Ahlberg, P., Szabad, M., Voka, V. & Kozak, V., 24.3.2015. The ontogeny of Ellipsocephalus (Trilobita) and systematic position of Ellipsocephalidae. Alcheringa 39, 477-487. ISSN 0311-5518.Well-preserved early holaspid stages of the Cambrian Series 3 trilobites Ellipsocephalus hoffi (Schlotheim, 1823) and Ellipsocephalus polytomus Linnarsson, 1877 have been discovered in the Pibram-Jince Basin (Czech Republic) and Jamtland (Sweden), respectively. Both species show remarkable morphological changes during late ontogeny. The earliest holaspides share long genal spines, and long macrospines on the second thoracic segment. Whereas macrospines disappear abruptly in later stages, genal spines are progressively shortened. Consequently, the ontogeny of trilobites of Ellipsocephalidae is revised. The morphology of early meraspid cranidia and ontogenetic patterns in the disappearance of macrospines suggest that this family is closely related to members of Redlichiida rather than Ptychopariida. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Ellipsocephalidae, Trilobita, ontogeny, Cambrian, Pibram-Jince Basin, Jamtland
in
Alcheringa
volume
39
issue
4
pages
477 - 487
publisher
Taylor & Francis
external identifiers
  • wos:000362718200005
  • scopus:84944177321
ISSN
0311-5518
DOI
10.1080/03115518.2015.1034968
language
English
LU publication?
yes
id
c0d1f814-c4c9-4986-bcea-d1a7d51f7af9 (old id 8205875)
date added to LUP
2015-11-26 13:57:30
date last changed
2017-05-28 03:10:54
@article{c0d1f814-c4c9-4986-bcea-d1a7d51f7af9,
  abstract     = {Laibl, L., Fatka, O., Budil, P., Ahlberg, P., Szabad, M., Voka, V. & Kozak, V., 24.3.2015. The ontogeny of Ellipsocephalus (Trilobita) and systematic position of Ellipsocephalidae. Alcheringa 39, 477-487. ISSN 0311-5518.Well-preserved early holaspid stages of the Cambrian Series 3 trilobites Ellipsocephalus hoffi (Schlotheim, 1823) and Ellipsocephalus polytomus Linnarsson, 1877 have been discovered in the Pibram-Jince Basin (Czech Republic) and Jamtland (Sweden), respectively. Both species show remarkable morphological changes during late ontogeny. The earliest holaspides share long genal spines, and long macrospines on the second thoracic segment. Whereas macrospines disappear abruptly in later stages, genal spines are progressively shortened. Consequently, the ontogeny of trilobites of Ellipsocephalidae is revised. The morphology of early meraspid cranidia and ontogenetic patterns in the disappearance of macrospines suggest that this family is closely related to members of Redlichiida rather than Ptychopariida.},
  author       = {Laibl, Lukas and Fatka, Oldrich and Budil, Petr and Ahlberg, Per and Szabad, Michal and Vokac, Vaclav and Kozak, Vladislav},
  issn         = {0311-5518},
  keyword      = {Ellipsocephalidae,Trilobita,ontogeny,Cambrian,Pibram-Jince Basin,Jamtland},
  language     = {eng},
  number       = {4},
  pages        = {477--487},
  publisher    = {Taylor & Francis},
  series       = {Alcheringa},
  title        = {The ontogeny of Ellipsocephalus (Trilobita) and systematic position of Ellipsocephalidae},
  url          = {http://dx.doi.org/10.1080/03115518.2015.1034968},
  volume       = {39},
  year         = {2015},
}