 |
|
Scientific name: |
Coenobita
pseudorugosus |
|
Chinese name: |
紅日陸寄居蟹 /
偽灰白陸寄居蟹 |
|
English name: |
- |
|
Japanese name: |
アカツキオカヤドカリ |
|
Max length of front part (head) of cephalothorax: |
12mm |
|
Distribution: |
Indian Ocean,
Madagascar, Maldives,
Philippines |
|
Habitat: |
- |
|
Chirping: |
- |
|
Favorite Shell: |
- |
|
*Remark |
When Akira
Asakura writing the article
①,
he asked Yukio Nakasone about how to name this species. As
the shield of this species is very beautiful, from red to
orange colour, just like the sky at sunrise, so he name this
specis as "Sunrise land hermit crab."
According to the
article
②,
Yukio Nakasone think that this
species are similar to
C.rugosus. The main different between
this 2 species is
male sexual tube. For Sunrise land hermit
crab, the right sexual tube is distinctly longer then the
left one, while in a great number of C.rugosus, the right
sexual tube is almost equal in length to the left, or the
right is slightly longer then the left.
But if we only
see their body colour, they are just similar to
juvenile
C. perlatus which with
special colour. Until now, there is no more information to
show that if this species is in fact misunderstood from the
juvenile of C. perlatus. |
| |
|
The following species information quote from
below 2 articles:
|
|
①Akira Asakura (Natural History Museum and Institute,
Chiba), Recent topics on taxonomy of hermit crabs from
Japanese waters - Family Coenobitidae |
|
②Yukio
Nakasone, Land Hermit Crabs from the Ryukyus,
Japan, with a Description of a New Species from the
Philippines (Crustacea, Decapoda, Coenobitidae) |
| |
| |
Shield colour
from red to orange.
According to the
article
②,
small individuals with a broad dark brown transverse band
at anterior one-third of shield and two longitudinal
stripes of the same colour on posterior portion. Large
individuals sometimes with two dark brown patches behind
anterior margin of shield.
|
 |
|
the shield colour I guess
according to the
article② |
|
↑TOP
| |
|
Eyes are
elongated in shape.
Eyestalks
are dark brown in colour.
|
↑TOP
| |
|
Left claw is larger than right claw.
There are some hair on the inside part of
both claws. There are 7~10 ridge (////) on the upper part of
the big claw. Palm of big claw is nearly straight (below red
line) in distal half and not four-cornered in an external
form (as
C.rugosus).
According to the
article
②,
Palm of big claw with a longitudinal white stripe on middle
portion and the other part dark-brownish.
3rd left
Walking legs
is flatten.
According to the
article
②,
Dactylus
of 2nd left and 3rd left legs each with a dark brown patch
at proximal part. Propodus of 3rd left legs with a broad
dark brown band on middle portion, propodus
of other legs with white band at distal one-fourth, other
area dark-brownish. carpus 1st and
3rd legs with a longitudinal dark brown stripe, merus
with dark brown ring.
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
| |
|
The shape of
male sexual tube as below.
|
↑TOP
| |
|
I had also asked Mr. Akira Asakura
of Natural History Museum and
Institute, Chiba, about this species, and he
also think that the following photos are C. spinosus.
But until
now, there is no more information to show that if this
species is in fact misunderstood from the
juvenile of C. perlatus.
|
↑TOP
|
|
|
