M.L. Nielsen
Sexual dimorphism within the stem-group arthropod Isoxys volucris from the Sirius Passet Lagerstätte, North Greenland
Nielsen, M.L.; Rasmussen, J.A.; Harper, D.A.T.
Abstract
Morphometric analyses carried out on 126 specimens of the early Cambrian (Cambrian Series 2, Stage 3) stem-group arthropod Isoxys volucris from North Greenland reveal a bimodal distribution, where Morphogroup A is characterised by a significantly wider doublure than Morphogroup B. The dimorphism is interpreted as intraspecific variation related to gender (sexual dimorphism), where the relative numbers of individuals within the two morphogroups are equal (ratio 1:1). The discovery of established sexual dimorphism in Isoxys may have implications for the taxonomic discrimination of other stemgroup arthropods within the morphologically diverse and disparate animals of the early Cambrian.
Citation
Nielsen, M., Rasmussen, J., & Harper, D. (2017). Sexual dimorphism within the stem-group arthropod Isoxys volucris from the Sirius Passet Lagerstätte, North Greenland. Bulletin of the Geological Society of Denmark, 65, 47-58
Journal Article Type | Article |
---|---|
Acceptance Date | May 5, 2017 |
Online Publication Date | Jul 5, 2017 |
Publication Date | Jul 5, 2017 |
Deposit Date | Jul 5, 2017 |
Publicly Available Date | Jul 31, 2017 |
Journal | Meddelelser fra Danske Geologisk Forening. |
Print ISSN | 0011-6297 |
Electronic ISSN | 2245-7070 |
Publisher | Geological Society of Denmark |
Peer Reviewed | Peer Reviewed |
Volume | 65 |
Pages | 47-58 |
Publisher URL | http://2dgf.dk/publikationer/bulletin/bulletin-volume-65-2017/ |
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Copyright Statement
© 2017 by Bulletin of the Geological Society of Denmark
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