A new species of Lecithostaphylus Odhner, 1911 (Trematoda: Zoogonidae) from the Pacific needlefish, Tylosurus pacificus
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ORIGINAL PAPER
A new species of Lecithostaphylus Odhner, 1911 (Trematoda: Zoogonidae) from the Pacific needlefish, Tylosurus pacificus, off the Pacific coast of Mexico, with a molecular assessment of the phylogenetic position of this genus within the family Jhonatan Cabañas-Granillo 1 & Brenda Solórzano-García 2 & Berenit Mendoza-Garfias 1 & Gerardo Pérez-Ponce de León 1,2 Received: 14 June 2020 / Revised: 27 July 2020 / Accepted: 30 July 2020 # Senckenberg Gesellschaft für Naturforschung 2020
Abstract A new species of Lecithostaphylus Odhner, 1911 (Zoogonidae) is described from the Pacific agujon needlefish, Tylosurus pacificus (Steindachner) (Belonidae), from two localities off the Pacific coast of Mexico. Morphologically, the new species agrees with the diagnosis of the genus Lecithostaphylus. Lecithostaphylus brayi sp. nov. differs from other congeneric species by a combination of morphological traits, including the overall body size, anterior and posterior extension of the vitelline follicles in the hindbody, and the presence/absence of papilla-like denticles on internal surface of ventral sucker. Lecithostaphylus brayi sp. nov. most closely resembles L. retroflexus (Molin, 1859), Odhner, 1911 and Lecithostaphylus tylosuri Châari, Derbel & Neifar, 2013 from Mediterranean needlefishes and Lecithostaphylus nitens (Linton, 1898) Linton, 1940 from needlefishes in multiple marine ecoregions; however, it can be distinguished by subtle morphological differences, host association, and geographical distribution. The new species will require further verification through a more detailed morphological study of L. nitens and, ideally, molecular data for L. nitens, L. retorflexus, and L. tylosuri. Newly generated 28S rDNA sequences allowed a phylogenetic assessment of the genus and show that Lecithostaphylus clades within the Zoogonidae, sister to the genera Deretrema Linton, 1910 + Proctophantastes Odhner, 1911, although the family Zoogonidae is not resolved as monophyletic. The inclusion of more representative genera in the molecular phylogenetic analysis will be needed to generate a more robust classification scheme for the Zoogonidae, and to discuss host specificity patterns for members of the family. Keywords Digenea . 28S rDNA . Chamela Bay . Acapulco Bay . Marine fish
Introduction
This article is registered in ZooBank under http://zoobank.org/ 96C0FAF1-5F88-4740-9B4F-9A6DBEFA94B0 Communicated by S. C. Cutmore * Gerardo Pérez-Ponce de León [email protected] 1
Instituto de Biología, Universidad Nacional Autónoma de México, Ap. Postal 70-153. C.P., 045 10 Mexico D.F., Mexico
2
Escuela Nacional de Estudios Superiores unidad Mérida, Universidad Nacional Autónoma de México, Tablaje Catastral N°6998, Carretera Mérida-Tetiz Km. 4.5, Municipio de Ucú, 97357 Mérida, Yucatán, Mexico
The trematode fauna of marine fishes along the Pacific coast of Mexico has been explored to a certain extent. The marine fish trematode fauna is richer by far than that of any other group of helminths in the region (Pérez-Ponce de L
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