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On the invalid resurrection of the lamprey genus Exomegas Gill, 1883

Riva‐Rossi, C., Renaud, C.B., Neira, F.J., Baigún, C., Baker, C.F., Quiroga, P. and Potter, I. (2021) On the invalid resurrection of the lamprey genus Exomegas Gill, 1883. Journal of Fish Biology . Early View.

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The lamprey genus Exomegas Gill, 1883, was erected on the assumption that it was distinguishable from Geotria Gray, 1851, by possessing three rather than two cusps on the transverse lingual lamina (TLL). Based on literature review and examination of holotypes and new data, the authors reaffirm that the TLL of Geotria possesses two or three cusps in the adult stage. The reduction or disappearance of the middle cusp at the beginning or during the spawning run constitutes a key feature of Geotria. The resurrection of Exomegas by Firpo Lacoste, Fernández and Scioscia, Journal of Fish Biology, 2021, 1–6, 1507–1512, is therefore unjustified and not supported.

Item Type: Journal Article
Murdoch Affiliation(s): Centre for Sustainable Aquatic Ecosystems
Harry Butler Institute
Publisher: Wiley-Blackwell
Copyright: © 2021 Fisheries Society of the British Isles.
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