Hypanus rubioi, commonly known as the longnose pacific stingray, is a species of cartilaginous fish in the stingray family Dasyatidae. It is endemic to the coastal marine waters of the Eastern tropical Pacific Ocean, specifically along the Pacific coast of Colombia. Described as a novel species in early 2025, H. rubioi is a large-bodied benthic predator characterized by its exceptionally long, sharply pointed snout, an elongated slender tail, and distinct morphometric proportions that distinguish it from other sympatric stingrays in its range.

Taxonomy and naming The longnose pacific stingray was formally described by marine biologists P. A. Mejía-Falla, A. F. Navia, D. Cardeñosa, and J. Tavera. The official species description was published on February 18, 2025, in the peer-reviewed scientific journal Ichthyology & Herpetology. Prior to its formal taxonomic description, populations of H. rubioi may have been misidentified or grouped alongside other similar long-snouted rays native to the Eastern Pacific region due to the subtle morphological overlaps within the genus Hypanus. The holotype specimen, utilized to establish the primary physical characteristics of the new taxon, is a large individual measuring 1,897 mm (74.7 in) in total length. The discovery of H. rubioi underscores the ongoing need for detailed morphological and genetic assessments in the Eastern Tropical Pacific, a region known for high levels of undocumented marine biodiversity and cryptic species complexes among elasmobranchs.

Description Hypanus rubioi is categorized as a large-sized species within its genus, capable of attaining a disc width (DW) of approximately 1,250 mm (49.2 in). The overall body plan follows the typical dasyatid morphology, but it is heavily modified with distinct proportional adaptations suited for its specific ecological niche.