---
title: "Ecuadorian Squirrel Monkey"
description: "Saimiri macrodon — Mammals. The Ecuadorian squirrel monkey (Saimiri cassiquiarensis macrodon) is a type of squirrel monkey."
canonical: https://animalchecklist.com/animal/ecuadorian-squirrel-monkey
last_updated: 2026-09-20
---

# Ecuadorian Squirrel Monkey

> Saimiri macrodon — Mammals. The Ecuadorian squirrel monkey (Saimiri cassiquiarensis macrodon) is a type of squirrel monkey.

- Scientific name: *Saimiri macrodon*
- Category: `mammals` (Mammals)
- Habitats: `forest` (Forest), `jungle` (Jungle)
- iNaturalist observations: 2417
- Wikidata: [Q41088164](https://www.wikidata.org/wiki/Q41088164)
- iNaturalist taxon: [1641936](https://www.inaturalist.org/taxa/1641936)

## Names

- en: Ecuadorian Squirrel Monkey
- de: Ecuador-Totenkopfaffe
- es: Mono Ardilla Ecuatoriano

## Countries with the most observations

EC (1379), CO (297), PE (295), BR (27)

## Summary

The Ecuadorian squirrel monkey (Saimiri cassiquiarensis macrodon) is a type of squirrel monkey.  It had been considered a subspecies of the Guianan squirrel monkey, Saimiri sciureus, but was elevated to a full species, S. macrodon, based on a 2009 study by Carretero-Pinzón, et al.  Based on subsequent genetic research by Jessica Lynch Alfaro, et al it was again reclassified as a subspecies of Humboldt's squirrel monkey.
The Ecuadorian squirrel monkey lives in the western Brazilian Amazon, as well as southern Colombia, eastern Ecuador and northern and eastern Peru.  It lives in humid tropical and subtropical forest…

Text: Wikipedia (en), CC BY-SA 4.0 — https://en.wikipedia.org/wiki/Ecuadorian_squirrel_monkey

## Photo

![Ecuadorian Squirrel Monkey](https://animalchecklist.com/img/animals/ecuadorian-squirrel-monkey/medium.jpg)

Photo: felipe idrobo · CC0 · inaturalist — https://www.inaturalist.org/observations/93741786

## Machine access

`GET https://animalchecklist.com/api/v1/animals/ecuadorian-squirrel-monkey?lang=en` — see [openapi.json](https://animalchecklist.com/openapi.json).