 |
|
中文/日本語 |
|
Click different
parts of the land hermit crab |
|
|
|
Scientific name: |
Coenobita
purpureus |
|
Chinese name: |
紫陸寄居蟹
(This name is just translated by me form
Japanese) |
|
English name: |
Purple Land
Hermit Crab / Okinawan Blueberry |
|
Japanese name: |
ムラサキオカヤドカリ |
|
Max length of front part (head) of cephalothorax: |
17mm |
|
Distribution(Map): |
Only can be
found in Japan. |
|
Habitat: |
Live in the forest near the coast but can
be found in the beach during beginning of summer
and autumn. |
|
Chirping: |
can make sound |
|
Favorite Shell: |
Achatina fulica,
Turbo shell |
|
*Remark |
In Japan,
they belong to a species which is "they will be in danger
in the near future" and belong to a
natural monument. |
The following species information is for
reference only
| |
|
Body colour can
be from light blue to dark purple. Most of them are
Purple-blue, Purple, Blue and Purple-Red etc. They were in
white colour when they are
juvenile, and will become blue or
purple when they grow up.
|
↑TOP
| |
|
Eyes are
elongated in shape and there are a yellow stripes surround
the eyes (Black arrow) .
Eyestalks
are white / light yellow in colour. Generally, there is no
black-brown stripes on the eyestalks (Red circle) but there
are also some exceptional
case. (※C.
rugosus
have some black-brown stripes on the
eyestalks)
|
↑TOP
| |
Tips of the 1st pair of antenna
(Red circle) is red. The bottom of
the 2nd pair of antenna
is white in colour.
Antennal acicle cannot move,
fused with second segment of its peduncle.
|
↑TOP
| |
|
Left claw is larger than right claw.
There are 4~5 ridge (////) on the upper
part of the big claw (Red circle). There are some hair on
the inside part of both claws. The joint of claw is yellow
in colour and
have filiform
red colour on the joint.
 |
|
Shape of big claw has a little bit
different among different species |
 |
|
Shape of
big claw of p.purpureus
and c.rugosus has a little bit different.
(But
there may be some exceptional case) |
The joint of walking
legs
is also yellow in colour and
have filiform
red colour on the joint (Red circle).
The last 2nd part (dactylus &
propodus) of their 3rd
left
Walking legs
is
not flat.
According to the articles of Akira Asakura (Japan Natural
History Museum and Institute, Chiba) and Yukio Nakasone
(University of the Ryukyus), outer surface of propodus of
left
3rd leg separated from dorsal surface by a well-marked
longitudinal crest.
|
 |
|
DRAW
by TONY |
|
↑TOP
| |
|
Abdomen is quite short and fat (Red
circle).
|
↑TOP
|
It is believed that
they were in cream colour when they are
juvenile, and will become blue or
purple when they grow up.
|
↑TOP
| |
|
The shape of
male sexual tube as below.
|
↑TOP
|
|
|
