Hypsolebias guararug

Hypsolebias guararug Abrantes, Berbel-Filho, Carvalho, Ramos & Lima, 2026

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Teleostei (teleosts) > Cyprinodontiformes (Rivulines, killifishes and live bearers) > Rivulidae (Rivulines) > Cynolebiinae
Etymology: guararug: Name 'guararug' from the Tupi-Guarani name of Piranhas-Açu River, the type locality of the new species.

Environment: milieu / climate zone / depth range / distribution range Ecology

Freshwater; benthopelagic. Tropical

Distribution Territories | FAO areas | Ecosystems | Occurrences | Point map | Introductions | Faunafri

South America: Brazil.

Size / Weight / Age

Maturity: Lm ?  range ? - ? cm
Max length : 3.4 cm SL male/unsexed; (Ref. 138871)

Short description Identification keys | Morphology | Morphometrics

Dorsal soft rays (total): 13 - 23; Anal soft rays: 19 - 24; Vertebrae: 27 - 28. This species is distinguished from its congeners by the following set of characters: polymorphic males with 1-3 black spots distributed on anterocentral portion of flank and caudal peduncle; pelvic fin rays in adult males 6; scales on longitudinal series 27-28; scales on peduncle series 10-13; infraorbital neuromasts 15-16; head depth in males 52.1-88.4; position of dark grey bar in eye vertical; lateral mandibular neuromasts 10; and vertebrae 27-28 (Ref. 138871).
Body shape (shape guide): fusiform / normal.

Biology     Glossary (e.g. epibenthic)

Life cycle and mating behavior Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae

Main reference Upload your references | References | Coordinator : Costa, Wilson J.E.M. | Collaborators

Abrantes, Y.G., W.M. Berbel-Filho, R.A. Carvalho, T.P.A. Ramos and S.M.Q. Lima, 2026. Description of two threatened and polymorphic seasonal killifish species of the genus Hypsolebias (Cyprinodontiformes: Rivulidae) from the Piranhas-Açu River basin, in the Brazilian semiarid. Neotrop. Ichthyol. 24(1):1-26. (Ref. 138871)

IUCN Red List Status (Ref. 130435: Version 2025-2 (Global))

Not Evaluated 

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

  Harmless





Human uses

FAO - Publication: search | FishSource |

More information

Trophic ecology
Food items (preys)
Diet composition
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References

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Summary page | Point data | Common names | Photos

Internet sources

AFORO (otoliths) | Aquatic Commons | BHL | Cloffa | Websites from users | Check FishWatcher | CISTI | Catalog of Fishes: genus, species | DiscoverLife | ECOTOX | FAO - Publication: search | Faunafri | Fishipedia | Fishtrace | GloBI | Google Books | Google Scholar | Google | IGFA World Record | OneZoom | Open Tree of Life | Otolith Atlas of Taiwan Fishes | PubMed | Reef Life Survey | Socotra Atlas | TreeBase | Tree of Life | Wikipedia: Go, Search | World Records Freshwater Fishing | Zoobank | Zoological Record

Estimates based on models

Phylogenetic diversity index
(Ref. 82804) 		PD50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight a=0.01122 (0.00514 - 0.02450), b=3.04 (2.87 - 3.21), in cm total length, based on all LWR estimates for this body shape (Ref. 93245).
Trophic level
(Ref. 69278) 		3.1   ±0.4 se; based on size and trophs of closest relatives
Resilience
(Ref. 120179) 		High, minimum population doubling time less than 15 months (Preliminary K or Fecundity.).
Fishing Vulnerability
(Ref. 59153) 		Low vulnerability (10 of 100). 🛈