---
title: "Slate Pencil Urchin"
description: "Eucidaris tribuloides — Altri animali. Eucidaris tribuloides, the slate pencil urchin (named after slate pencil), is a species of cidaroid sea urchins that inhabits littoral regions of the Atlantic Ocean."
canonical: https://animalchecklist.com/it/animal/slate-pencil-urchin
last_updated: 2026-09-20
---

# Slate Pencil Urchin

> Eucidaris tribuloides — Altri animali. Eucidaris tribuloides, the slate pencil urchin (named after slate pencil), is a species of cidaroid sea urchins that inhabits littoral regions of the Atlantic Ocean.

- Scientific name: *Eucidaris tribuloides*
- Category: `other` (Altri animali)
- Habitats: `sea` (Mare e costa)
- iNaturalist observations: 984
- Wikidata: [Q1081312](https://www.wikidata.org/wiki/Q1081312)
- iNaturalist taxon: [47836](https://www.inaturalist.org/taxa/47836)

## Names

- en: Slate Pencil Urchin
- es: Erizo lápiz
- fr: Oursin-lance antillais

## Countries with the most observations

US (126), MX (120), BR (56), JM (43), VI (42), KY (40), BZ (35), CV (33), CU (27), HN (27), GP (23), MQ (23)

## Summary

Eucidaris tribuloides, the slate pencil urchin (named after slate pencil), is a species of cidaroid sea urchins that inhabits littoral regions of the Atlantic Ocean.  As a member of the basal echinoid order Cidaroida, its morphological, developmental and molecular genetic characteristics make it a phylogenetically interesting species.

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

## Photo

![Slate Pencil Urchin](https://animalchecklist.com/img/animals/slate-pencil-urchin/medium.jpg)

Photo: Yann Kemper · CC0 · inaturalist — https://www.inaturalist.org/observations/194079886

## Machine access

`GET https://animalchecklist.com/api/v1/animals/slate-pencil-urchin?lang=it` — see [openapi.json](https://animalchecklist.com/openapi.json).