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Review
. 2022 Mar;100(3):831-834.
doi: 10.1111/jfb.14975. Epub 2021 Dec 20.

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

Carla Riva-Rossi  1 , Claude B Renaud  2 , Francisco J Neira  3 , Claudio Baigún  4 , Cindy F Baker  5 , Pamela Quiroga  1 , Ian Potter  6
Affiliations
Review

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

Carla Riva-Rossi et al. J Fish Biol. 2022 Mar.

Abstract

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.

Keywords: Exomegas; Geotria australis; Geotria macrostoma; lamprey; transverse lingual lamina.

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References

REFERENCES

    1. Baker, C. F., Riva Rossi, C., Quiroga, P., White, E., Williams, P., Kitson, J., … Baigún, C. (2021). Morphometric and physical characteristics distinguishing adult Patagonian lamprey, Geotria macrostoma from the pouched lamprey, Geotria australis. PLoS One, 16(5), e0250601.
    1. Berg, C. (1893). Geotria macrostoma (Burm.) Berg y Thalassophryne montevidensis Berg dos peces particulares. Anales del Museo de La Plata, II, 3-7.
    1. Berg, C. (1895). Sobre peces de agua dulce nuevos o poco conocidos de la República Argentina. Anales del Museo Nacional de Buenos Aires, Second Series, IV, 121-165 + 2 pls.
    1. Berg, C. (1899). Comunicaciones ictiológicas. Comunicaciones del Museo Nacional de Buenos Aires, I(4), 91-97.
    1. Burmeister, H. K. K. (1868). (Petromyzon macrostomus, descripción de una nueva especie de pez.). Sesión del 9 de Octubre de 1867. Acta de la Sociedad Paleontológica. Anales del Museo Público Buenos Aires, Vol. XXXV-XXXVII.