Other animals › Echinometridae
Red Pencil Urchin
Heterocentrotus mamillatus
24 photos
Study shows up to four per card, from different observers, so you learn the species rather than one picture. Heart the good ones and swap any you do not like.
Photos you add are credited to you, and you keep the copyright.
Easily confused with
Heterocentrotus trigonarius
Indo-Pacific Rock-boring UrchinEchinometra mathaei
Slate Pencil UrchinEucidaris tribuloides
Imperial Sea UrchinPhyllacanthus imperialis
Study checks a spoken answer against these, and tells you which one you named.
Where it is recorded
| Hawaii | 2,016 |
|---|---|
| United States | 1,440 |
| Egypt | 20 |
| South Sinai Governorate | 16 |
| Japan | 6 |
| Australia | 6 |
| Okinawa Prefecture | 5 |
| Israel | 4 |
| Southern District | 4 |
| Red Sea Governorate | 4 |
Counts show where people looked, not only where it lives.
Traits
Physical
- RegenerationCan regrow lost body partsFrom its classification
Classification
| Kingdom | Animals · Animalia |
|---|---|
| Phylum | Echinoderms · Echinodermata |
| Class | Sea Urchins, Sand Dollars, and Heart Urchins · Echinoidea |
| Order | Camarodonta |
| Family | Echinometridae |
| Genus | Heterocentrotus |
Sources
- Names, taxonomy and observation counts: www.inaturalist.org
- Photos and recordings: the creator and source are on each one.
- How much to rely on each source
Remember the name next time.
Practise Red Pencil Urchin with real photos from different observers. Say the name out loud, and it comes back just before you would forget it.