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中文/日本語 |
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Click different
parts of the land hermit crab |
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Scientific name: |
Coenobita cavipes |
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Chinese name: |
凹足陸寄居蟹 / 長趾陸寄居蟹 |
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English name: |
Concave Land
Hermit Crab |
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Japanese name: |
オカヤドカリ |
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Max length of front part (head) of cephalothorax: |
30mm |
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Distribution(Map): |
India
~
Pacific Ocean,
Eastern part of Africa to Philippines, Malaya, China, Japan,
Taiwan, Micronesia, Polynesia |
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Habitat: |
Live in inland
area of the forest.
They will go to beach area only if they
go for breeding. They usually find food
in the forest or between stone, they are
omnivorous animals,
mainly eat fruits.They
always use Achatina fulica as their shell, may be because
Achatina fulica are easily found in inland area. |
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Chirping: |
Cannot make sound |
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Favorite Shell: |
Achatina fulica,
Turbo shell,
Tonna Shell |
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*Remark |
Many people misidentify C. cavipes
as
C. violascens.
If we look at their 1st pair of antenna, we can easily
identify both of them. 1st pair of antenna of C. cavipes are
not red, but C. violascens are red. In Japan, they
belong to a natural monument. |
The following species information is for
reference only
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Body colour is quite simple, usually in
Dark Brown or Brown.
Juvenile is similar to adult.
There are many light colour granule /
spot (Red circle) on their walking legs and claws.
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Eyes are
elongated in shape.
Eyestalks
of
adult
are black in colour.
But
for
juvenile, only
the lower part
eyestalks of eyestalks are black (Red
circle).
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The bottom part of
2nd pair of antenna
(Red circle) are orange in colour. But
the
1st pair of antenna is not in
red colour.
Antennal acicle cannot move, fused with second
segment of its peduncle.
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Left claw is larger than right claw, and
have light colour granule / spot. There are no ridge (////)
on the upper part of the big claw. Tips of big colour tend
to white / light colour (Red circle) , and the lower part
have dark colour pattern. Also, there are some hair on the
inside part of both claw.
The bottom part of left claw (red
narrow) is outstanding toward canter.
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Shape of big claw has a little bit
different among different species |
Walking legs
are
obviously
slim, especially dactylus of
their 3rd left walking leg (Red circle) is quite long and
slim.
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Abdomen is quite slim and long (Red
circle), this may be a reason why they always use in
Achatina fulica.
Another reason may be because they live in the inland area,
so it is easier to find Achaina fulica as shell. (just my
opinion)
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Juvenile is
similar to adult, may be the body
colour is lighter. |
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Found that
some pictures which may be the juvenile
of Coenobita cavipes.
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The shape of
male sexual tube as below.
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