---
title: "Madagascar Green-Emerald Giant Pill-Millipede"
description: "Zoosphaerium neptunus — Otros animales. Zoosphaerium neptunus, also known as the emerald green giant pill millipede, is a species of pill millipede in the family Arthrosphaeridae."
canonical: https://animalchecklist.com/es/animal/madagascar-green-emerald-giant-pill-millipede
last_updated: 2026-09-20
---

# Madagascar Green-Emerald Giant Pill-Millipede

> Zoosphaerium neptunus — Otros animales. Zoosphaerium neptunus, also known as the emerald green giant pill millipede, is a species of pill millipede in the family Arthrosphaeridae.

- Scientific name: *Zoosphaerium neptunus*
- Category: `other` (Otros animales)
- Habitats: unknown
- iNaturalist observations: 291
- Wikidata: [Q27941374](https://www.wikidata.org/wiki/Q27941374)
- iNaturalist taxon: [122723](https://www.inaturalist.org/taxa/122723)

## Names

- en: Madagascar Green-Emerald Giant Pill-Millipede

## Countries with the most observations

MG (206)

## Summary

Zoosphaerium neptunus, also known as the emerald green giant pill millipede, is a species of pill millipede in the family Arthrosphaeridae. This species is shiny green and the largest pill millipede known, with some females reaching 90 mm (3.5 inches) in length. An adult female of this size can roll into a ball the size of a baseball. This millipede is endemic to Madagascar, and the large size of this species is an example of island gigantism. This millipede has been observed in large aggregations of thousands of specimens and is the only species in the order Sphaerotheriida known to form such swarms.

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

## Photo

![Madagascar Green-Emerald Giant Pill-Millipede](https://animalchecklist.com/img/animals/madagascar-green-emerald-giant-pill-millipede/medium.jpg)

Photo: Vijay Barve · CC0 · inaturalist — https://www.inaturalist.org/observations/6990331

## Machine access

`GET https://animalchecklist.com/api/v1/animals/madagascar-green-emerald-giant-pill-millipede?lang=es` — see [openapi.json](https://animalchecklist.com/openapi.json).