Endangered
Melanorivulus ivinhemensis
Melanorivulus ivinhemensis
Melanorivulus ivinhemensis is a killifish in the family Rivulidae (order Cyprinodontiformes), recorded as Endangered and tied to Brazil.
The killifish
New World rivulids include annual killifish that survive a dry season as eggs in mud, and non-annual forest-stream forms.
Killifish, livebearers, and splitfins — small-bodied freshwater fishes, many of them from a single lake, spring, or seasonal pool.
Range and habitat
Melanorivulus ivinhemensis is recorded from Brazil.
The type locality — the place tied to the name-bearing specimen — is “Brazil, Mato Grosso do Sul State, municipality of Nova Andradina, first order stream of Rio Ivinhema, 22°11’53”S, 53°20’12”W, altitude 300 m a.s.l.”.
GBIF currently lists 5 occurrence points. Those points follow where people logged the taxon — museum drawers and surveys included — not a closed range boundary.
Pins are Wikidata “endemic to” fields. Orange dots, when present, are GBIF occurrence tiles — survey bias included.
Breeding
Annual rivulids hatch, breed, and die in one wet season; the eggs wait in the mud. Non-annual species live in forest streams year-round.
Small desert or forest fishes in this order live in water that can vanish. The egg bank, if there is one, is the only reserve.
In crisis
Melanorivulus ivinhemensis 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 Wikidata item Q63873606 and GBIF occurrence geography. No dedicated encyclopedia article was available at build time. Family and order context is original writing about the group — not a claim that a monograph exists for this name. Not an IUCN assessment. Confirm status and range on iucnredlist.org.
