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Hoof-shield
limpet
Scutus sp.
Family Fissurellidae
updated
Aug 2020
Where
seen? This
large slug-like limpet is sometimes encountered on our Northern shores,
under stones usually alone. 'Scutus' comes
from the word 'suctum' which is the name of the Roman shield that
the shell resembles.
Features: Oval shaped animal (3-5cm). The body is a lot
larger than its shell, usually folded up around the edges of the shell
and may cover most of the shell. In fact, the shell might be completely
covered by the mantle, so that it appears to be a slug at first glance.
Hoof-shield limpets come in various colours. The body may be black
or beige, and shell white or brown. It has a pair of short tentacles. Scutus unguis has an all-black body. Scutus sinensis is the only other species so far listed for Singapore.
The hoof-shield limpet is a true limpet and breathes with gills.
Unlike other members of the Family Fissurellidae, a hoof-shield limpet
doesn't have a hole at the top of its shell.
Sometimes confused with slugs which are snails without shells. Here's more on how to tell apart slugs and other slug-like
animals. |
Chek Jawa, Jul 02 |
Chek Jawa, Apr 03. |
Tuas, Mar 06 |
What do they eat? According to Gosliner, they appear to
feed on colonial ascidians.
Status and threats: Scutus
unguis is listed as 'Endangered' on Red List of threatened animals
of Singapore. According to the Singapore Red Data Book: "Once
common on many rocky shores, it is now rare due to habitat loss. Seawalls
do not appear to be a viable alternative habitat for this animal." |
A barnacle grew on its shell!
Changi, Dec 10
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Underside.
Changi, Dec 10
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Hoof-shield
limpets on Singapore shores |
Other sightings on Singapore shores |
Sembawang, Oct 20
Photo
shared by Vincent Choo on facebook. |
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Punggol, Nov 20
Photo
shared by Vincent Choo on facebook. |
Punggol, Dec 10
Photo
shared by Loh Kok Sheng on flickr. |
Punggol, Jun 12
Photo
shared by Loh Kok Sheng on flickr. |
Pulau Sekudu, Oct 11
Photo
shared by Loh Kok Sheng on his
blog. |
Pulau Sekudu, Jul 16
Photo
shared by Loh Kok Sheng on his blog. |
Beting Bronok, Jun 10
Photo
shared by Loh Kok Sheng on his
flickr. |
Tanah Merah, Dec 08
Photo
shared by James Koh on his
blog. |
East Coast Park, Jul 16
Photo
shared by Loh Kok Sheng on his blog. |
East Coast Park (B), Jun 21
Photo
shared by Vincent Choo on facebook. |
Sentosa Serapong, Jul 21
Photo
shared by Vincent Choo on facebook. |
St John's Island, Feb 24
Photo
shared by Vincent Choo on facebook. |
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Big Sisters Island, Feb 24
Photo
shared by Vincent Choo on facebook. |
Small Sisters Island, Aug 22
Photo
shared by Jianlin Liu on facebook. |
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Pulau Senang, Aug 10
Photo
shared by Loh Kok Sheng on his
flickr. |
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Links
References
- Tan Siong
Kiat and Henrietta P. M. Woo, 2010 Preliminary
Checklist of The Molluscs of Singapore (pdf), Raffles
Museum of Biodiversity Research, National University of Singapore.
- Tan, K. S.
& L. M. Chou, 2000. A
Guide to the Common Seashells of Singapore. Singapore
Science Centre. 160 pp.
- Davison,
G.W. H. and P. K. L. Ng and Ho Hua Chew, 2008. The Singapore
Red Data Book: Threatened plants and animals of Singapore.
Nature Society (Singapore). 285 pp.
- Gosliner,
Terrence M., David W. Behrens and Gary C. Williams. 1996. Coral
Reef Animals of the Indo-Pacific: Animal life from Africa to Hawaii
exclusive of the vertebrates
Sea Challengers. 314pp.
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