Guyanancistrus nassauensis

The ray-finned fish

Guyanancistrus nassauensis is a ray-finned fish in the family Loricariidae (order Siluriformes).

Range and habitat

Guyanancistrus nassauensis is known solely from Paramaka Creek and some of its tributaries, Marowijne River Basin, in the Surinamese Nassau Mountains (an area of approximately 20x20 km2). In Paramaka Creek, G. Nassauensis occurs syntopically with juvenile G. Brevispinis and with Harttiella crassicauda, a second endemic species from the Nassau Mountains. Even so, G. Nassauensis occurs both on the plateau in perennial flowing headwaters and in the upper mainstem of Paramaka Creek (lower slopes of the plateau. Altitude range 120–530 m amsl), whereas H. Crassicauda only occurs on the plateau proper (230–530 m amsl).

Pins are Wikidata “endemic to” fields. Orange dots, when present, are GBIF occurrence tiles — survey bias included.

In crisis

G. Nassauensis is a rare species, highly endemic to the Nassau Mountains in Suriname, and is threatened with extinction by proposed or ongoing mining activities. With this very restricted distribution (< 20x20 km2) both species can be considered hyperendemics and currently the two species are threatened with extinction by a proposed bauxite mine and by ongoing illegal gold mining activities.

Guyanancistrus nassauensis is Endangered on this catalog because that is the IUCN category stored on Wikidata. Confirm the official criteria and any later count on iucnredlist.org.

Sources

Written for this catalog from the English Wikipedia article on Guyanancistrus nassauensis, Wikidata item Q47461565. Family and order context is original field-guide writing about the group, not a copied assessment of this one species. Wikipedia text is CC BY-SA. Not an IUCN assessment. Counts, when quoted, can change — confirm them on the recovery programme and on iucnredlist.org.