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On Temnocephala axenos Monticelli, 1898 (Platyhelminthes, Temnocephalida): taxonomic status and designation of a neotype

Published online by Cambridge University Press:  22 October 2020

S.A. Seixas Open the ORCID record for S.A. Seixas [Opens in a new window] ,
S.B. Amato Open the ORCID record for S.B. Amato [Opens in a new window] ,
J.F.R. Amato ,
L.C.C. Daudt  and
C. Damborenea Open the ORCID record for C. Damborenea [Opens in a new window]
S.A. Seixas*
Affiliation:
División Zoología Invertebrados, Facultad de Ciencias Naturales y Museo, UNLP, Paseo del Bosque, 1900, La Plata, Argentina
S.B. Amato
Affiliation:
Departamento de Zoologia, Instituto de Biociências, Universidade Federal do Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil
J.F.R. Amato
Affiliation:
Departamento de Zoologia, Instituto de Biociências, Universidade Federal do Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil
L.C.C. Daudt
Affiliation:
Departamento de Zoologia, Instituto de Biociências, Universidade Federal do Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil
C. Damborenea
Affiliation:
División Zoología Invertebrados, Facultad de Ciencias Naturales y Museo, UNLP, Paseo del Bosque, 1900, La Plata, Argentina
*
Author for correspondence: S.A. Seixas, E-mail: seixas.sa@gmail.com
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Abstract

Temnocephala axenos Monticelli, 1898 was described based on specimens from an unidentified host collected in Blumenau, Santa Catarina, Brazil. Information about type locality was imprecise and the host was later identified as Aegla laevis (Latreille, 1818). However, it is known that A. laevis is not present on the eastern side of the Andes. Also, only histological preparations from one specimen studied by Monticelli are currently available in the Museum für Naturkunde Berlin, but it showed none of the taxonomic characters needed for the characterization of the species. Although the updated description of the species based on Uruguayan specimens, neither the author nor the several previous studies about the species showed a search for the type material, a resolution for the misidentification of the type host or the imprecise type locality due to the subsequent geographical division of the municipality cited in the description. The Uruguayan specimens were not even geographically close to the type locality and a neotype was not designed to validate the species’ taxonomic status again. Specimens from Santa Catarina and Paraná States, Brazil, were studied, as well as restudied Argentinean specimens. The new data were compared with the update description of the species. The historical background and the discussion about geographical origins and hosts of the species, as well as a designation of a neotype, allow comparative material of the type locality and type host to exist, eliminating doubts about the identification of T. axenos.

Keywords

AeglaAeglidaeepibiontNeotropical regionRhabdocoela
Type
Research Paper
Information
Journal of Helminthology , Volume 94 , 2020 , e203
Copyright
Copyright © The Author(s), 2020. Published by Cambridge University Press

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Footnotes

†

Deceased in January of 2018

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