Potamarius Hubbs & Miller 1960
- Dataset
- A new classification of the family Ariidae (Osteichthyes: Ostariophysi: Siluriformes) based on combined analyses of morphological and molecular data
- Rank
- GENUS
Classification
- kingdom
- Animalia
- phylum
- Chordata
- class
- Actinopterygii
- order
- Siluriformes
- family
- Ariidae
- genus
- Potamarius
description
(Figs 1 – 3, 16 B, 18) Type species: Conorhynchos nelsoni Evermann & Goldsborough, 1902. Diagnosis Epioccipital contacting small narrow area of diagonal crest associated with neural spine of fourth vertebra (44, 2> 0); lateral margins of orbitosphenoid progressively diverging anteriorly (63, 0> 1); optic foramen very large (67, 1> 0); distance between optic foramen and trigemino-facialis foramen small, equal to width of trigemino-facialis foramen (68, 1> 0); contact face for articulation of transcapular process with basioccipital large and depressed (85, 0> 1); opercle posterior portion well developed posteriodorsally (129, 0> 1); interopercle rectangular (134, 0> 1). Ambiguous optimization: Posterior cranial fontanel present (26, 0> 1); epiphyseal bar conspicuous (28, 1> 0); temporal fossa present (38, 1> 0); vomer lateral processes very narrow (53, 0> 1); subvertebral process well developed (78, 0> 1); maxilla lateral and mesial margins considerably closer to each other proximally, distally narrow and pointed (102, 2> 3); metapterygoid anterior process truncate (138, 0> 1); second basibranchial spindle-shaped (166, 1> 0); third basibranchial very short and wide (169, 1> 0); extensionofdiagonalcrestassociatedwithposterior branch of parapophysis of complex vertebra short, reaching transverse crest (199, 1> 0); opening delimited by epioccipital posterior process and crests of sustentaculum of Weberian apparatus very large (203, 2> 0); 14 or fewer ribs (213, 1> 0); second dorsal cleithral process dorsally directed and parallel to first dorsal process (226, 0> 1); protractor muscle of parapophysis of fourth vertebra originating from ventral surface of parieto-supraoccipital process and posterior process of epioccipital (248, 1> 0). Included species Potamarius izabalensis Hubbs & Miller, 1960 Potamarius nelsoni Evermann & Goldsborough, 1902 Potamarius usumacintae Betancur-R. & Willink, 2007. Habitat and distribution: Freshwater, eastern Central America (Fig. 16). Remarks The total-evidence analysis corroborates the monophyly, relationships and species composition of Potamarius sensu Betancur-R. et al. (2007) and Betancur-R. (2009), with results showing that the previous inclusion of Paragenidens grandoculis in Potamarius (Marceniuk and Menezes 2007, Marceniuk et al. 2012) was the result of morphological convergence (characters 64, 67, 68, 120), apparently the result of secondary invasion of freshwater environments (Marceniuk et al. 2019 b, c).
Name
- Homonyms
- Potamarius Hubbs & Miller 1960