Pachypops Gill 1861
Creators: name: Casatti, Lilian
Publisher: name: Zenodo
Year: 2002
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Actinopterygii
Perciformes
Sciaenidae
Pachypops

description: Genus <i>Pachypops</i> Gill 1861 Type species. <i>Micropogon trifilis</i> Müller and Troschel 1848: 622 (by original designation). <i>Diagnosis</i>. Distinguished from the two other known South American freshwater sciaenid genera (<i>Pachyurus</i> and <i>Plagioscion</i>) by the following combination of characters: mouth inferior, presence of three mental barbels, the swimbladder with a pair log posterior branches projecting from shorter paired anterior appendages (Fig. 1), and presence of the expanded haemal spine on the first caudal vertebra (Fig. 2). Gender masculine. <i>Comments</i>. According to Sasaki (1989), <i>Pachypops</i> is characterized phylogenetically by its swimbladder with a pair of anterior appendages (see Fig. 1), the possession of an unpored median barbel, and the possession of a pair of mental barbels. An unpublished phylogenetic study of South American freshwater sciaenids done by the author of the present paper reveals that the species of <i>Pachypops</i> share not only those synapomorphies listed by Sasaki (1989) but also an expanded haemal spine on the first caudal vertebra (see Fig. 2). These four synapomorphies are assumed to be homoplastic with other perciforms in the final most parsimonious phylogeny. Jordan and Eigenmann (1889: 413) assigned <i>Pachyurus adspersus</i> Steindachner 1879 to the genus <i>Pachypops</i>. However, despite bearing three mental barbels and six mental pores, <i>P</i>. <i>adspersus</i> lacks the expanded haemal spine and the appendages on the swimbladder, which occur in <i>Pachypops</i>. Casatti (2001) considered <i>P</i>. <i>adspersus</i> a member of <i>Pachyurus</i> as originally proposed by Steindachner. An expanded haemal spine on the first caudal vertebra is also present in some other examined perciforms (the haemulid <i>Haemulon steindachneri</i>, the polynemid <i>Polydactylus virginicus</i>, and the sciaenids <i>Dendrophysa russelli, Kathala axillaris</i>, and <i>Plagioscion auratus</i>, pers. obser.) but it is interpreted as having been independently derived in these taxa. Based on the barbel morphology <i>Pachypops cevegei</i> Cervigón 1982 is not a species of <i>Pachypops</i>, but instead a species of <i>Micropogonias</i>. Therefore, of six nominal species of <i>Pachypops</i> according to previous authors, two (<i>Pachypops adspersus</i> and <i>Pachypops cevegei</i>) are not assignable to the genus. The remaining nominal species are discussed below under “Comments” for <i>Pachypops fourcroi</i> and <i>Pachypops trifilis</i>.
description: Published as part of <i>Casatti, Lilian, 2002, Taxonomy of the South American genus Pachypops Gill 1861 (Teleostei: Perciformes: Sciaenidae), with the description of a new species, pp. 1-20 in Zootaxa 26</i> on pages 2-4, DOI: 10.5281/zenodo.4620231
description: {"references": ["Gill, T. (1861) Revision of the genera of North American Sciaeninae. Proceedings of the Academy of Natural Sciences of Philadelphia, 1861, 79 - 89.", "Muller, J. &amp; Troschel, F. H. (1848) Fische. In: R. Schomburgk (Ed), Reisen in British Guiana inn den Jaren 1840 - 1844. Leipzig, p. 618 - 644.", "Sasaki, K. (1989) Phylogeny of the family Sciaenidae, with notes on its zoogeography (Teleostei, Perciformes). Memories of the Faculty of Fisheries Hokkaido University, 36, 1 - 137.", "Jordan, D. S. &amp; Eigenmann, C. H. (1889) A review of the Sciaenidae of America and Europe. Report of Commissioner of Fish and Fisheries, 14, 343 - 451.", "Steindachner, F. (1879) Ichthyologische Beitrage (VIII). Sitzungsberichte der Kaiserliche Akademie der Wissenschaften Wien, 80, 1 - 52.", "Casatti, L. (2001) Taxonomia do genero sul-americano Pachyurus Agassiz, 1831 (Teleostei: Perciformes: Sciaenidae) e descricao de duas novas especies. Comunicacoes do Museu de Ciencias e Tecnologia da PUCRS, Serie Zoologia, 14, 133 - 178.", "Cervigon, F. (1982) La ictiofauna estuarina del cano Manamo y areas adyacentes. In: D. Nova (Ed), Los recursos pesqueros del Rio Orinoco y su explotacion. Corporacion Venezuelana de Guayana, Division de Desarrolo Agricola, Caracas, pp. 205 - 260."]}