Taxonomy, Distribution and Evolution of Trisopterine Gadidae by Means of Otoliths and Other CharacteristicsReport as inadecuate


Taxonomy, Distribution and Evolution of Trisopterine Gadidae by Means of Otoliths and Other Characteristics


Taxonomy, Distribution and Evolution of Trisopterine Gadidae by Means of Otoliths and Other Characteristics - Download this document for free, or read online. Document in PDF available to download.

Joost van den Vondelstraat 30, 7103 XW Winterswijk, The Netherlands





Academic Editor: Eric Hallerman

Abstract In a greater study of the recent fossil Gadidae, the object of this paper is to better define the trisopterine species and their relationships. The taxonomy of the four recent species usually included in the genus Trisopterus is further elaborated by means of published and new data on their otoliths, by published data on general external features and meristics of the fishes, and their genetics. Fossil otoliths, from the beginning of the Oligocene up to the present, reveal much of their evolution and throw more light on their relationships. Several succeeding and partly overlapping lineages representing different genera are recognized during this time interval. The genus Neocolliolus Gaemers, 1976, for Trisopterus esmarkii Nilsson, 1855, is more firmly based. A new genus, Allotrisopterus, is introduced for Trisopterus minutus Linnaeus, 1758. The similarity with Trisopterus capelanus Lacepède, 1800 is an example of convergent evolution. The tribe Trisopterini Endo 2002 should only contain Trisopterus, Allotrisopterus and Neocolliolus as recent genera. Correct identification of otoliths from fisheries research and from sea bottom samples extends the knowledge of the present day geographical distribution of T. capelanus and T. luscus Linnaeus, 1758. T. capelanus is also living along the Atlantic coast of Portugal and at least up to and including the Ría de Arosa, Galicia, Spain. There it can easily be mistaken for A. minutus that is also living there. Otoliths of T. luscus have been identified from the Evvoïkós Channel between Euboia and the mainland of Greece, thus it must live also in the Aegean Sea. Otoliths prove to be a powerful tool in taxonomy, biogeography and evolution of teleosts. View Full-Text

Keywords: Trisopterus; Neocolliolus; new genus Allotrisopterus; Trisopterini; new data on systematics; evolution; and biogeography Trisopterus; Neocolliolus; new genus Allotrisopterus; Trisopterini; new data on systematics; evolution; and biogeography





Author: Pieter A. M. Gaemers

Source: http://mdpi.com/



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