| Crenuchidae (South American darters), subfamily: Characidiinae |
| 3.21 cm SL (male/unsexed) |
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benthopelagic; freshwater |
| South America: Mazaruni and Berbice River basins in Guyana. |
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Vertebrae: 34-34. Distinguished by the following combination of apparently apomorphic characters: posttemporal bone is absent; extrascapular reduced to a bony latero-sensory canal; epioccipital bridge absent; parietal branch of the supraorbital latero-sensory canal restricted to the frontal bone; supraorbitals absent; medial process on rib of fifth vertebral centrum present as a simple bony spine; a well-defined foramen is present on the posterior region of the medial lamina of the coracoid; fifteen or more dorsal-fin rays present; lateral line incomplete; discrete bands or spots absent, except for a diffuse humeral blotch; origin of the anal-fin base located slightly posterior to or in advance of a vertical line drawn from the posterior termination of the dorsal fin; teeth of all jaw bones conical; body slab sided, relatively short; the anterior portion of pterotic latero-sensory canal does not enter the sphenotic; sphenotic bone, state 0 = sphenotic separated from the posttemporal fossa by presence of an articulation of the parietal and pterotic, state 1, sphenotic enlarged posteriorly and forming a part of the anterior border of the posttemporal fossa; circuli are present on the posterior or apical field of the lateral body scales (Ref. 34069). |
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Vulnerable (VU); Date assessed: 17 January 2021 (A2c; B1ab(iii,v)+2ab(iii,v)) Ref. (130435)
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| harmless |
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