ńͪӚǮ?ƩƏƊơı̱Ӟ¿Ƙӟǭʢȅѽ 1*àʟŲʛ 2Ű͇Ƚ©ѽ 3

Preliminary study of soil macrofauna on Minami-Iwo-To Island
Toshio KISHIMOTO1*, Tetsuro SASAKI2 & Shin-ichiro WADA3
1. D*?!<ƌ̿͂Ɯś¨p[Ӟ422-8017 ҷǪ͞ҷǪǼӑ˰ĽƩм 5762ӟ
Museum of Natural and Environmental History, Shizuoka, 5762 Oya, Suruga, Shizuoka, Shizuoka
422-8017 Japan
2. ̲ǈҸŻĞ˹ı˵Ë ǞΏŌϠ̩ɺĸͨΆɃӞ100-2101 ʪÊҀǞΏŌʦ̮ǮƽИ͋ӟ
Institute of Boninology, Nishimachi, Chichijima, Ogasawara, Tokyo 100-2101 Japan3. ӐҀƩǂʪÊ§̀ǹǂͨΆͷӞ250-0031 ʪÊҀĉ̺ƻńƩˮӟGraduate School of Science and Engineering, Tokyo Metropolitan University, 1-1 Minami-Osawa,Hachioji, Tokyo 192-0397 Japan* tetrabothrus@gmail.com (author for correspondence)Йʆ 2017 ȅ 6 ʙ<Ǌʀ'U1ńͪӚǮ?ǂЊжʴҢ<7ě?ʢʺ͖;Ɗơı̱жʴXЉ
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ӨӣөӤǞΏŌτǮ9?ˡі
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1Ӌ͇˸ͲˣƖэǇˣīчϬȵˣӞǞΏŌϠ̩ɺĸͨΆɃӟˀϱ΋ˣӞϠ̩͂ƜͨΆs¥v¨ӟˀȵ̀ˣ̄ǶБŝˣŐCńͪӚǮжʴҢ?ĈҢűQCҢ?m¨~X121Ĉ7?ɿ<ŋ!ȤͰ͊)­$TӪӤȒ͆ɺ̶Ҷʟ̇© Ӟ1983 ӟńͪӚǮ?mmwӇ. ńͪӚǮ?Ϡ̩, ͂ƜȉϠ̩ïлǢӞκӟʃʢ҉̱̈́̈́ͨΆs¥v¨, 361-367.
Ҷʟ̇©§Ō͇˸ Ӟ1978ӟ ǞΏŌзǮ?Ɗơı̱͜?ͨΆ I. ƊơΘюı̱?τҫˉѫӤƈΊͷņǚƘ, (11).
Ҷʟ̇©§ϮѾ˱Τ Ӟ2008ӟ ńͪӚǮ?mmwӇӤ ńͪӚǮϠ̩͂ƜжʴƘūʗ, 165167.
®ʦѩа Ӟ2016ӟ ʃʢͅroÇ͙?ėӇӤCancer, 25, 109-112.
Yamaki A, Shimomura M, Watanabe H, Karube H, Kishimoto T (2011) Assellote isopods (Crrustacea:Isopoda) from soil habitat in southern Japan. Proceeding of the 8th International Symposium ofTerrestrial Isopod Biology ISTIB, Bled Slovenia: 117-118.
ǩǰʲʹ Ӟ1983ӟ ńͪӚǮ?]~oӇ. ńͪӚǮ?Ϡ̩, ͂ƜȉϠ̩ïлǢӞκӟʃʢ҉̱̈́̈́ͨΆs¥v¨, 371.

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SUMMARY

Preliminary study of soil macrofauna on Minami-Iwo-To Island
Toshio KISHIMOTO1*, Tetsuro SASAKI2 & Shin-ichiro WADA3
1. Museum of Natural and Environmental History, Shizuoka, 5762 Oya, Suruga, Shizuoka, Shizuoka
422-8017 Japan
2. Institute of Boninology, Nishimachi, Chichijima, Ogasawara, Tokyo 100-2101 Japan
3. Graduate School of Science and Engineering, Tokyo Metropolitan University, 1-1 Minami-Osawa,
Hachioji, Tokyo 192-0397 Japan* tetrabothrus@gmail.com (author for correspondence)
In June 2017, we conducted the first intensive soil fauna survey on Minami-Iwo-To Island. Using
the hand sorting method and a Tullgren funnel, we have so far found 57 species belonging to 25 families,
15 orders, and 5 classes, with ongoing species identification still being performed in many of these taxa.
Many taxa were discovered for the first time in this survey. Pseudoscorpiones and Haploxenida were newrecords on the order level from this island. We found unique and endemic species of Scydmaenid beetles
and Lathridid beetles. At the community level, compared to the Ogasawara Archipelago, the ratio ofterrestrial isopods was low, amphipods were absent, and the species diversity of diplopods was low. The
taxa of soil macrofauna on this island were strongly biased, with low species diversity compared tomacrofauna in the Ogasawara archipelago.
Key words
Arthropoda, Hand sorting method, Oceanic islands, Tullgren, Megascolecidae.

− 300 −Ќ 1Ӥ ¥t¨|\¥h˵<QTжʴXǊʀ)1ƌ̥?ˇЙӤTable 1. Summary of study plots which were surveyed by hand sorting method.
Plot No. +23m) /&.&*,HS-01
10 24.22759 141.46866  %HS-02
30 24.22792 141.4687 (HS-03
510 24.23056 141.45893  (3#$: !4
HS-04
590 24.23082 141.45994  (3#$: !4
  "" 
HS-05
750 24.23223 141.46152
  !
HS-06
900 24.23492 141.46364  (3#$: 1 140)'
6/24
6/24
6/16
6/20
6/21
6/21

Ќ 2Ӥz¡h¢¥˵<QTжʴXǊʀ)1ƌ̥?ˇЙӤTable 2. Summary of study plots which were surveyed by Tullgren funnel.
Plot No. DMNm) J=I=
CGH>8?
TL-01
30 24.22792 141.4687 @
6/17
$5
6/22
TL-02
300 24.22792 141.4687
N;6<BFEA7O
K9
TL-03
510 24.23043 141.45908
6/22
NL+!3&3/,O
"20O
6/16
TL-04
510 24.23056 141.45893 (@N4:: *
TL-05
590 24.23082 141.45994 (@N4:: *"20O
6/21
(*1%!3&3/,
TL-06
750 24.23223 141.46152
6/21%. *"20TL-07
900 24.23492 141.46364  : 
6/21
TL-08
900 24.23511 141.46421   :   
6/21
TL-09
890 24.23482 141.46397  : 
6/21
TL-10
890 24.23447 141.46386   
6/21 ) 2/-* TL-11
900 24.23428 141.46367
6/21
2 #'2N4:LLO− 301 −Ќ 3ӤƩƏƊơı̱жʴ8ͫб'U1ėӇτ q~Ӥ
Table 3. Taxonomic list of the soil macrofauna found in this survey.
SOP6"2O 6"2P4O$2O
6!S +6!O2 !S 2 !O4SNLSJVSYMStaxon
D[TOrientzomus ? sp.
>2E^@Q
Arachnida Fam. Gen. et spp.
4OXHQ
Pseudoscorpionida Fam. Gen. et sp.
$2O@Q
Polyxenida Fam. Gen. et sp.
+6!O@Q
Lithobiumorpha Fam. Gen. et sp.
2 !O@Q
Geophilomorpha Fam. Gen. et sp.
2 !O@Q
Burmoniscus sp.
>:2O
4;>:2E@Q
Japygoiidae Gen. sp.
2O'12APQ
Periplaneta australasiae
 ,;O
 ,;P
>4? ,;\FV]
Ornebius sp.
(O% P% @Q\FV]
Euborellia annulipes'12O '12P)='12\FV]
Psocoptera Fam. Gen et sp.
;2O5 2@Q
Psocoptera Fam. Gen et spp.
5 2XHQ\FV]Unkanodes ? sp.
32O? P/="*? ZCQ
Nabis kingbergii
0 ( 3P
1#10 ( 3Geostomus pygmaeus
 32P)3 32Lygaeidae Gen. et sp.
#32P#32P@Q
Hemiptera Fam. Gen et spp.
32O\FV]
Bacanius sp.
NVO
?02P,?02^@Q
Ptinella sp.
2  &2P 2  &2@Q
Aleochara parens'%
P =),"'%^
Dictyon insulicola
0'%
Homalotini Gen. sp.
< '%
I@Q
Aleocharinae Gen. sp.
),"'%
BP\FV]
Scydmaeninae Gen. et sp.
2BP@QAstenus leptocerus-;='%
Scopaeus viriliformis
(%)3 *.'%Diochus sp.
 :-'%E@QPhilonthus discoideus* :'%

Ataenius pacificus
 %2P#?9$0 %3 2P>:63 ^\FV]Megapenthes makiharai
Derolathrus atomus ?
6,?2P
6,?2P@QGlaeosoma ? sp.
1?2P
1?2P@Q
Mumfordia ? sp.
)30 2P)30 2P@Q
Cucujoidea Fam. Gen et sp.
):2AP@Q\FV]
Litargus sp.
 &2P)3 &2@Q
Cossoninae Gen et sp. 1
2P2@Q
Cossoninae Gen et sp. 2
2@Q
Chironomidae Gen. et spp.
'O
7; P
7; PXHQ
Psychodidae Gen et sp.
8(P8(P@Q
Cecidomyiidae Gen. et sp.
0(P@Q
Sciaridae Gen. et sp.
=(% &(P@Q
Drosophilila sp.
88(P 88(E@Q^\W]
Calyptera Fam. Gen et sp.
KGUBR\FV]Diptera Fam. Gen et spp.
'OXHQ
Tineidae ? Gen. sp.
8O)= P)= P^\FV]
Erpis pacificalis iwojimensis ?
" P= &3 ^\FV]
Lepidoptera Fam. Gen et sp. 1
8O\FV]
Lepidoptera Fam. Gen et sp. 2
8O\FV]
Chalcidoidea ? Gen. spp.
'O
(AP^\XHQ]
Trachymesopus pilosior
;P, ';;Hypoponera sp.
$';;E
Tetramorium bicarinatum
>;Monomorium chinense=)3;Strumigenys sp.
=;E@Q
Paratrechina amia, 3=;Camponotus iwoensis
 9.
;
Megascolecidae Gen. sp.
# 11O +"11P+"11P@Q− 302 −Ќ 4Ӥ ¥t¨|\¥h˵<QSͫб'U1ėӇτ q~Ӥ
Table 4. List of taxa collected by hand sorting method.
CUOtaxon

=3E?M
5KSHM%3K?M,7"K?M
3 "K?M
3 "K?M
5:=93E?M
=5> -:VFQW& ?MVFQW*<(23VFQW
:3K?M6!3SHMVFQW0<#+> TBM
2$21 ) 4$43L?M
43KVFQW
<*-#(& X1 (& ; (& I?M.:<(& )&*4+/(& +  9(& D@VFQW
2>3L?M3?M<)& ') L?M
D@VFQWJGPANVFQWD@VRW( KSHMVFQWD@VRW*< LXVFQW
< '4 XVFQW
8KVFQW
8KVFQW
- (::%(::E
=:<*4:- 4<:Trithyreus sp.
Arachnida Fam. Gen. et spp.
Pseudocorpionida Fam. Gen. et sp.
Polyxenida Fam. Gen. et sp.
Lithobiumorpha Fam. Gen. et sp.
Geophilomorpha Fam. Gen. et sp.
Burmoniscus sp.
Periplaneta australasiae
Ornebius sp.
Euborellia annulipes
Psocoptera Fam. Gen et sp.
Psocoptera Fam. Gen et spp.
Unkanodes ? sp.
Nabis kingbergii
Lygaeidae Gen. et sp.
Hemiptera Fam. Gen et spp.
Aleochara parens ?
Dictyon insulicola
Homalotini Gen. sp.
Astenus leptocerus
Scopaeus viriliformis
Philonthus discoideus

A

HS-01
B C



HS-03
HS-04
HS-05
HS-06
B C A B C A B C A B C                                                 AHS-02B CA 


Calyptera Fam. Gen et sp.
Diptera Fam. Gen et spp.
Tineidae ? Gen. sp.
Erpis pacificalis iwojimensis ?
Lepidoptera Fam. Gen et sp. 1
Lepidoptera Fam. Gen et sp. 2
Trachymesopus pilosior
Hypoponera sp.
Tetramorium bicarinatum
Monomorium chinense
Paratrechina amia

− 303 −





Glaeosoma ? sp.
Cossoninae Gen et sp. 1
Sciaridae Gen. et sp.



Ќ 5Ӥz¡h¢¥˵<Q47ɎĖ'U1ʈЀӇ?ėӇτ q~Ӥ
Table 5. List of insect taxa collecteted by Tullgren funnel.
taxa>PKJapygoiidae Gen. sp.
$,-<HI
Periplaneta australasiae8/9 (5QAMR
Ornebius sp.
" ;IQAMR
Euborellia annulipes
&7$,-QAMR
5-G;IQAM:OCIR Psocoptera Fam. Gen et sp.
Geostomus pygmaeus&. .-
Lygaeidae Gen. et sp.
.-H;I
Bacanius sp.
( 9+-S;I
Ptinella sp.
- #-;I
Aleochara parens
7&($" S
Dictyon insulicola
+$" Homalotini Gen. sp.
6 $" D;I
Aleocharinae Gen. sp.
&($" =HQAMR
Scopaeus viriliformis
%"&.'*$" ?<SQAMR
Diochus sp.
 4)$" @;I
Philonthus discoideus
'  4$" ?<SQAMR
Scydmaeninae Gen. et sp.
-=H;IAtaenius pacificus
93!+ "?<SQAMR
840. SQAMRMegapenthes makiharai
Derolathrus atomus ?
0(9-H;IGlaeosoma ? sp.
,9-H;I
Mumfordia ? sp.
&.+ -H;ICucujoidea Fam. Gen et sp.
&4-<H;IQAMR
Litargus sp.
&. #-;I
Cossoninae Gen et sp. 1
-;I
?<QNR
Cossoninae Gen et sp. 2
-;I
Curculionidae ? Gen. et sp.
-HSQAMR
Coleoptera Fam. Gen et sp.
FMGQAMR
Chironomidae Gen. et spp.
15 HOCI
?<QAMR
Psychodidae
Gen et sp.
2% H;ICecidomyiidae Gen. et sp.
+% H;ISciaridae Gen. et sp.
7%" #% H;I
?<QAMR
Drosophilila sp.
22% @;ISQNR
Calyptera Fam. Gen et sp.
EBL=JQAMR
?<SQNR
Diptera Fam. Gen et spp.
$ GOCI
?<QAMR
?<QNR
Tineidae ? Gen. sp.
&7 HSQAMR
Erpis pacificalis iwojimensis ?
7 #. SQAMR
%<HSQOCIR
Trachymesopus pilosior
( $55Hypoponera sp.
!$55@
Tetramorium bicarinatum
85Monomorium chinense7&.5Strumigenys sp.
75@;IParatrechina amia
( .75Camponotus iwoensis 3*5− 304 −