CR

Cnesterodon omorgmatos

Unknown

Overview

Cnesterodon omorgmatos, the Cilida toothcarp, is a species of poeciliid native to the Paranapanema River basin in Brazil.

Cnesterodon omorgmatos faces severe threats from habitat degradation and water pollution in its restricted range within the Río de la Plata basin. Urban development and agricultural runoff have significantly altered water quality in the small streams and tributaries where this species occurs. The introduction of non-native fish species has created additional competitive pressure, while dam construction and water extraction have modified natural flow regimes essential for reproduction.

Threat summary

Habitat

This small freshwater fish inhabits shallow, slow-flowing streams and tributaries within the Río de la Plata drainage system in South America. It typically occurs in areas with dense aquatic vegetation and soft substrates, preferring waters with moderate temperatures and specific chemical parameters.

FRESHWATER· major

Other threatened species in POECILIIDAE

EN

Micropanchax bracheti

Unknown
CR

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Gambusia eurystoma

Unknown
EN

Mountain Molly

Poecilia teresae

Unknown
EN

Saisi Lampeye

Lacustricola matthesi

Unknown

Threatened in Brazil

Striped SmoothhoundCR

Striped Smoothhound

Mustelus fasciatus

Declining
VU

Mussismilia hispida

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VU

Myrcia carioca

Declining
Brasilia TapaculoEN

Brasilia Tapaculo

Scytalopus novacapitalis

Declining

Frequently asked questions

Why is Cnesterodon omorgmatos classified as Critically Endangered?
Cnesterodon omorgmatos is classified as Critically Endangered — facing an extremely high risk of extinction in the wild — because population sizes are very small, declining sharply, or restricted to a tiny range. Cnesterodon omorgmatos faces severe threats from habitat degradation and water pollution in its restricted range within the Río de la Plata basin. Urban development and agricultural runoff have significantly altered water quality in the small streams and tributaries where this species occurs. The introduction of non-native fish species has created additional competitive pressure, while dam construction and water extraction have modified natural flow regimes essential for reproduction.
Where does Cnesterodon omorgmatos live?
Cnesterodon omorgmatos occurs in Brazil. Country-level distribution data is sourced from the IUCN Red List and cross-referenced with GBIF occurrences.
What are the main threats to Cnesterodon omorgmatos?
The main threats to Cnesterodon omorgmatos are ai-1, ai-2, ai-3, and ai-4. The full IUCN-classified threat record for this species is detailed on the species page.

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