The anophthalmic Trechiama (Coleoptera, Trechinae) from the Nunobiki Hills and their surrounding areas

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Mem. Natn. Sci.Mus., Tokyo, (2S),December 1,199S

The Anophthalmic Trechiama (ColeopteTrreac,hinae)from

the Nunobiki Hills and their Surroundin gAreas')
By
Shun-IchiUENo*

L" ee-*:AieILkttUt;tomaiZ!tetuOtJiffeasAtireWptwa

The Nunobiki Hills are a kind of low plateau stretching for about 40 km in a north-south
directio nat the southern part of northeastern Henshu, Japan. The area is limite bdy the alluvium of
the Abukuma-gawa River on the east, by it stTibutar yGohyaku-gawa on the north and by the
Oh-kawa Valley on the west. It is lower in the north (aroun d1,OOO m in height )than in the south
(1,50 m0 or more in height) ,and continues southwards to the Nasu Volcanoes .Because of this rather
monotonous topography, the Nunobiki Hills haye not attracted attention of Japanese entomologists
and have escaped from close investigati oonf the fauna.
Having described 7}'echiam asonuta (UENo ,1992 b, p. 28, figs .4-6) from the central part ofthe
Abukuma Hills ,however, I came to realize the zoogeographical importance of the Nunobiki Hills,
which intervene between the known localit yof the new species and that of its closest relative, 1: balli.
Repeated collectings were attempted after that to clarify the trechine fauna of the hill yarea, and soon
in August of the next year, an anophthalmic trechine beetl ewas found out by OHKAwA and ONDA
at it ssouthern part. It turned out to be a species belonging to a differen stubgroup (cf U,ENo, 1993,
p. 2), but two rnonths later ,a new species indubitabl ybelonging to the balli-sonut acomplex was
discovere dat the central part, which amply proved my supposition to be correct. Since then, we have
surveyed almost all parts of the Nunobikis, and have succeeded in collecting anophthalrnic trechines
at eight stations. It has been ciarified that the northeastern and central parts of the hill yarea are
inhabited by a member ofthe echigonis subgroup, but that a species of the insperatu ssubgroup extends
it sdistributio tnowards the north along the western side of the Nunobikis to it snorthern end. It has
also been clarified that other new species of the former lineage occur in the adjacent areas north and
northwest of the Nunobiki Hills ,but that the Minamiaizu Hills west of the Oh-kawa Valley are
occupied at leas tby a species ofthe latte rlineage ,Strangely enough, ne other anophthalmic trechines
than the mernbers of T)'echiam ahaye so far been met with on the Nunobikis, although T)rechiama
sonuta coexists with Kurasawatrechus zenbai S. UENo (199 0b, p, 176, figs ,1-2) at the central part of
the Abukuma Hills (No .12 in Fig. 23) and T insperatus coexists with a Kurasawatrechus at the
northeastern part of the Minamiaizu Hill s(No. 23 in Fig. 23).
') This study is supported in part by the Grant-in-aid No. 06640914 for Scienti fRiecsearch from the Ministry
of Education, Scienc eand Culture J,apan.
* Departrnent of Zoology, National Scienc eMuseum, Tokyo.
paUiiF\vatzeseutzMzaXS

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In the present paper, I am going to describ efour new species of the eehigonis lineag eof
7)'echiam aand to record new localiti eofs T insperatus. Phylogenetic relationship and radiation of
the members of the echigonis subgroup will be discussed ,and the known localiti eofs the trechine
beetle sbelonging to the two subgroups will be shown on a sketch map. The abbreviations employed
herein are the same as those explained in previous papers of mine.
Befbre going into furthe rdetail s,I wish to express my deep indebtedne stso Dr, Yoshiaki
NIsHiKAwA and Mr. Shinzaburo SoNE, who always helped me in the fiel dworks, and to Messrs,
Hideo OHKAwA and Kengo ONDA, who promptly submitted their findings to me fbr taxonomic
study. But for their kind support, the present study could neyer have been completed.
Description sof New Species
7)'echiam a(s ,str.) ptanipenni sS. UENo, sp. nov.
(Fig s1.-2, 10)
Length: 4.70'L4.9 m5m (fro mapical margin of clypeus to apices of elytra).
Closely similar in external morphology to T: echigonis S. UENo (1972 p,. 43, figs .1-3; 1985, p.
74) from Harukiyama of the Kushigata Hills ,but the body is obviously fiatt erwith stouter
appendages. Closer to T accipitris S. UENo (1983 p,. 8, figs .2-5; 1985, p. 74, pL 14, fig ,15) of the
Shirataka Hills in male genitali fceatures b,ut readily distinguishe fdrom i tby the flattene dbody, the
posteriorl lyying proximal dorsal pore on the elytra, and the differently shaped copulatory piece ,the
las tone of which resembles that of Z echigonis.
i
Colour as in Z echigonis.
Head 1arge ,widely depressed on dorsum, with fronta lfurrows deeply impressed in front and
forming on eaoh side a relatively steep declivi otfy the anterior part of the innc rside of supraorbital
area; genae feebly convex, more gradually narrowed behind than in Z echigonis; neck constriction
shallow, les ssharply marked than in T echigonis; labrum slightly emarginate at apex instea dofbeing
t ttt/ tt/t1//.tt/
/
.fr.:./.aE}'ttZ.=tA:r-"?r'tknsFsts,
1 2
.K'-t- it,an;igi/lznlli/ii,
/.t '
<t t x,tttltt'S'iji;7･s)Slii.tVf/ltr'/S{?･-,rt.. {/l/iillii
.k.z-tS-L･.1...Llj "E.Sp . >> >L L-".x )!,W/x .. ;,o,";zl

X..J'/
lffriE･(
e ,
k
k l

X Y s-v - -
-
O.5 mm
Figs. 1-2. Male genitalia of 7)vchiama (s .str.) planipennis S. UENo, sp. noy,, from the Gokuraku-t6ge;
lef tlater ayliew (1) ,and apical part of aedeagus, dorso-apic yailew (2).
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straight; mentum tooth broad especially at the base and slightly bifi adt the tip ;antennae stouter than
in T echigonis, reaching basal fbur-ninths of elytra, with segments 7-9 each about 2.S times as long
features in71
as wide; other cephalic as echigonis,
Pronotum more widely depressed on the disc than in Z echigonis, widest at two-thirds from base,
with the basal area les sdilate dposteriad s;ides more strongly and regularly arcuate in front, rather
shallowly sinuate at basal fift h,and then either very slightly divergent towards hind angles or
subparallel; hind angles sharp and usually a littl emore produced posteria dthan laterad ,rarely
rectangular; base only slightly wider than apex, nearly straight at middle but slightly oblique posteriad
on each side; front angles obtuse and hardly produced, obyiously les smarked than in Z echigonis;
PWIHW 1.38-1.41(M 1.40),PWIPL 1.17-1.19(M 1.18),PWIPA 1.45-1.49(M 1,47),PWIPB

1.32-1.4 1(M 1.37) ,PBIPA 1,03-1,1 3(M 1.08) [PAIPB O.89-O.97 (MO.93)] ;other pronetal
feature sas in T echigonis.
Elytra eyidently flatte trhan in 7: echigonis, widely depressed on the disc and with gentle apical
and latera ldecliviti eosv,ate, widest at a leve lbetween basal two-fifths and four-ninths ,and more
gradually narrowed towards apices than towards bases ;EWIPW 1,62-1,68 (M 1.65) ,ELIEW 1.46-
1.50 (M 1.49) ;shoulders les sdistinc atnd more widely rounded than in Z echigonis, with prehumeral
border smore o6]ique; sides not so widely reflexed before middle as in Z echigonis, regularly arcuate
in proximal two-thirds, very feebly so behind, and rather narrowly rounded at apices, which usually
fbrm a small re-entTant angle at suture; striation and chaetotaxy as in I: echigonis, though the
proxirna ldorsal pore on the 5th stria is located at a level between basal 114 and 215 (usuall 2y/7),
or much more distan tfrom base instead of being located slightly befbre the leve lof the fourth
umbilicate pore of the marginal series.
Legs obviously stouter than those in 71 echigonis, though basically identical in confbrmation with
the latter.

Male genita lorgan generall ysimilar to that of T accipitris, though markedly ditferen tin
configuration ofcopulatory piece. Aedeagus one-third as long as elytra, more regularly arcuate from
base to apex than in T accipitris, with the basa lpart hardly bent, though gently curved, towards the
ventral side; apical lobe shorter than in Z accipitris, with the apex simply rounded in dorsal view
instea dof being subtruncated; ventral margin shallowly emarginate in profil e.Inner sac armed with
a copulatory piece ,two patches of sclerotized teeth ,and a patch of thin spine-like scales; copulatory
piece about two-ninths as long as aedeagus, somewhat spatulate, curyed ventrad in apical part,
rounded at the apex, and lying at a right ventral position; lef tproximal teeth-patch consisting of large,
heavily scleretized teeth lying above the lef tside of copulatory piece ,and somewhat sigmoidally
curved at the dorsa lpart; dorso-apica lteeth-patch horizontal l,ying jus itnsid eapical orifice; patch of
thin scales fairl ylarge ,subtriangular as a whole, and situated behind lef tproximal teethpatch. Styles
fair lsylender, lef tstyle obviously longer than the right, each bearing fbur setae at the apex,
71ype specimen. Holotype: dZ, allotype: 9, 24-VIII-199S, S. SoNE & Y. NIsHrKAwA leg,
Paratypes:1\,22-VIII-1994,Y. NisHiKAwA leg.;1cr",24-VIII-1995, S.SoNE & Y. NIsHIKAwA

leg .All deposited in the collection of the Department of Zoology, National Science Museum (Nat.
Hist.),Tokyo.

1)ep elocali tyG.okuraku-t6ge, 330m in altitude at the northwestern side, near Kogura of
Oguni-machi in Yamagata Prefecture ,northeastern Honshu, Northeast Japan.
IVbtes .This is an interesti nsgpecies combining characters from Z echigonis and Z accipitn-s, It
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is probably closer to the former because of the similarity in external feature sand in configuration of
copulatory piece, but the general configuration of it smale genitali ias very similar to that in the latter.
Geographically ,it stype 1ocali tlyie bsetween those of the two species, but is much nearer to that of
the former (cf F.ig. 23, Nos. 1, 2 and 3).
The description 7: female in
above of planipennis was eriginally prepared on a single coilected
the summer of 1994. It seemed to rne preferabl eto name it in the present paper even on a female
specimen alone, since it soccurrence fil lisn the wide geographica lgap between the localit yof T
echigonis and those of the other members of the same species-complex. As three additional specimens
were obtained at the las tmoment, however, I hastil yrewrote the original account, added a
descriptio nof male genitali ccharacters to that of the external morphology, and replaced the earlier
manuscript with the present one.
The type localit oyf Z planipennis is a small scree deposited at the right side of a narrow stream
flowing into the Ohtaki-gawa, a tributary of the Ara-kawa River. Thus, it lie sin the same drainage
system as that of Z echigonis, which is 27.5 km distan tto the west-northwest from the fbrmer. It is
nearer to the type locali tofy T: ball Si. UENo (198 6b, p. 15, figs .1-3) ,which is 20 km distan tto the
southeast from the former and lie sin the Mogami-gawa drainage area. Flowing on a low gentl ehM
only 400 m high ,the streams that empty into the Ohtaki-gaw ahave usually deposited very sticky clay
on their banks, which is not favourable for harbouring upper hypogean beetles. Only the exception
we have fbund out in that area is the srnall scree, only 5rn wide, 1.5m deep and 30-50cm in
thickness. In spite of four yisits to this place ,we were unable to collect any additional specimen, and
as the las tresort, we dug it up to the bedrock on July 16, 1995, and after setting wet rice-straw mats
at the bottom, put back the soil and rock debri sas much as we could. This attempt brough tabout
a good result; three specimens of the trechine beetle ,includi ntgwo males, were finall cyaught by
SoNE and NisHiKAwA on August 24, about a month and a half after the setting of the trap, all
attracted to the wet mats,
7}rechiam a(s .str.) sinuatus S. UENo, sp, nov.
(Fig s3.-4, 13)
Length: 5.05-5.55 mm (fro mapical margin of clypeus to apices of elytra).
Closely allied to 11 ball iS. UENo (198 b6, p. IS, figs .1-3) of the prospectin gadits at Tokoro-
zawa of Keya, but differen itn sornewhat smaller head and configuration of prothorax ,which is a little
narrower at the apex and has longer basal part ,with the sides more strongly rounded in front.
Evidently differen ftrom Tl ball iin the configuration of rnale genitalia.
Head as in T balli ,though the genae are a litt llees sconyex and the antennae reach the middle
of elytra. Pronotum somewhat narrower at apex than in Z balli ,widest at about two-thirds from
base; sides more strongly rounded in front ,more shallowly sinuate at about basal fourth ,and then
either les swidely divergent towards hind angles or nearly paralle lw,ith hind angles usually less sharp
and les sprotrudent laterad; in one of the paratypes ,two postangular setae present at the lef tside;
basa larea evidently lenge rthan in Z ball iP;W/HW 1.44-1.5 0(M 1.47) ,PWIPL 1.13-1.16
(M 1.14),PWIPA 1.48-1.51(M 1,49),PWIPB 1.33-1.41(M 1.37),PBIPA 1.07-1.11(M 1.09)

[PAIPB O.90-O.93 (M O,92)] .Elytra as in Z balli t,hough more widely rounded at apices and a little
more convex on dorsum; EWIPW 1.65-1.7 8(M 1.74) ,ELIEW 1.43-1.5 1(M 1.47) .Legs sornewhat
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Anophthalmic 7}?chiama ftom the Nunobikis and the Surroundings ISI
4
--.
..- --
$stLC?"
6
X l
N N....t -
Figs, 3-6, Male genita]i aof T}'echiama (s .str.) spp, of the echigonis lineage ;lef tlatera lview (3 ,S), and
apical part of aedeagus, dorso-apica lyiew (4 ,6). 3-4. T sinuatus S. UENo, sp. nov,, frorn
Sasakawa-yama of Kogai, 5-6. Z ancorijler S. UENo, sp. nov., from the Sanmori-t6ge.
slenderer than in T balli.
Maie genita lorgan fairl ylarge and heavily sclerotized, Aedeagus about two-fifths as long as
elytra, hardly arcuate, and widely membraneous on dorsum, with elongate basal part gently curved
ventrad, which is deeply emarginate at the sides of basal orifice and provided with a large hyaline
sagittal aileron; apical lobe fairl ylong, gradually narrowed towards truncated apex in dorsa lview;
viewed laterally ,apical lobe narrow, gradually tapered towards apex, distinct cluryved ventrad
behind apical orifice, sinuate, and ending in an upturned subtruncated extremity; ventral margin
almost straight at middle in profil e,Inner sac armed with a large elongate copulatory piece and two
patehes of sclerotized teeth; copulatory piece about two-sevenths as long as aedeagus, somewhat
spatulate, rounded at the apex, and provided with a patch of thin spine-like scales at the lef tside of
the apical part ;lef tproximal teeth-patch small, consisting of rather a srnall number of heavily
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sclerotized teeth, lying at the left side ofthe middle of copulatory piece ,and continuing dorso-apically
to a sheet of minute, poorly sclerotized scales; dorso-apica lteeth-patch horizontal b,road and fairly
short, lying jus itnsid eapical orifice. Style sslender, lef tstyle longer than the right, each bearing three
setae at the apex, an extra minute seta present on the left style in one of the paratypes (cf F.ig, 3),
7)lpeserie sH.olotype: oi, allotype: 4, paratypes: 4[{"ui ,1 9, 18-IX-1994, K. ONDA leg .All
deposite din the collection of the Department of Zoology, National Science Museum (Nat .Hist,),
Tokyo.
7)lp elocalit y.Sasakawa-yama, 710 m in altitud ea,t Kogai of Inawashiro-machi in Fukushima
Prefecture, Northeast Japan.

IVbtes . This and the followi nsgpecies fi1 1in the wide blank in our knowledge about the
distributi oonf the echigonis lineag eof 7}'echiama .The type localit yof T sinuatus is about 39 km
distan tto the south-southeast from that of Z ball iand is about 21 krn north by west of that of Z
anconZfer, which is in turn about 55 km distan tto the northwest from that of T sonuta. It is true that
there still remains a blank between the localiti eofs T ancorijler and Z sonuta, or at the western side
of the Abukuma Hills ,but a 55 krn gap is only a half of the 1 10 km one between the type localities
of Z ball iand Z sonuta.
The occurrence of Z sinuatus near the northwestern foot of Mt. Tengunosum6tori-yama (1,327
m in height) is most unexpected, since the mountain is largel ygraniti cand has been affected by the
tephra spouted from the Bandai-san Volcanoes, which li eadjacent to the west. SoNE and I paid a visit
to the mountain late in the spring of 1994, and were disappointe dat findin gthat the environmental
condition was mostly unfavourable for the existence of upper hypogean fauna. ONDA's discovery has
revised our former observation, showing that certain oases fbr subterranean beetle smay continue to
exist even in a seemingly unfavourable area.
IVechiama(s. S.UENo,
str.) ancorijTer sp. nov.
(Fig sS,-6, 14)
Length: 5,25-5,9 5mm (fro ampical margin of clypeus to apices of elytra).
Very closely allied to the preceding species and distinguishab lweith confidence only by the
remarkable differenc ien conformation of aedeagal apical lobe ,which bears an adaxial anchor-like
plate in this species instea dof being sinuate dorso-ventral laynd ending in a truncated refiexed apex.
Slightly large ron an average and usually a litt ldearker in coloration than in Z sinuatus. Head
as in Z sinuatus, but the antennae are somewhat longer ,reaching apical four-ninth sof elytra in o-,
the middle of elytra even in 9 . Pronotum somewhat variable in shape, though the sides are more
deeply sinuate at a level between basal two-ninths and one-fourth and more widely divergent be-
hind the sinuation; hind angles sharper and more distinct lpyrotrudent latera dthan in T sinuatus;
PWIHW 1.46-1.53 (M 1.49),PW/PL 1.14-1.21(M 1.17),PWIPA 1.45-1.55(M 1.51),PWIPB

1.34-1.4 1(M 1.38) ,PBIPA 1,05-1.1 5(M 1.10) [PAIP BO.87-O.95 (MO.92) ]E.lytra as in Z
sinuatus, though sometimes a ]ittl learge rthan in the latte rE;W/PW 1.62-1.7 1(M 1.67) ,ELAIW
1.44-1.5 1(M 1.49) ;apical striole rarely joini nstgria 7 on one elytron, Legs as in Z sinuatus,
Male genital organ basical slimyilar to that of T sinuatus, but smaller and markedly diffbren itn
conformation of aedeagal apical lobe. Aedeagus about one-third as long as elytra, elongate,
depressed ,and hardly arcuate, with elongate basal part and rather short apical lobe ,both gently
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curved ventrad; viewed dorsally ,apical lobe narrowed towards fair lbyroad apex, which is sub-
truncated and slightly tuberculate at the middle; viewed laterall ya,pical lobe gradually tapered
towards pointed apex, which bears a small vertical semicircular plate forming an anchor; ventral
margin hardly emarginate in profile . Inner armature as in T sinuatus, but the copulatory piece is
narrower, one-third as long as aedeagus, and provided with a row of sclerotized scales along the
dorso-apica lrnargin; teeth-patches as in T sinuatus, though the lef tproximal teeth-patch is smaller.
Styles narrow at the apical parts, lef tstyle a littl leonger than the right, each usually bearing three
setae at the apex.
7)lp eseries. Holotype: ai, allotype: 4, 570m alt., 15-V-1994, S. UENo & S. SoNE leg.
Paratypes:2ui ai, same data as for the holotype; 3aZ a7',19 (inc lte.neral 1d7',1\ ), same site, 30-
VIII-1994,S.UENo & Y. NisHiKAwA leg.;2a" 2\ 9 750 15-V-1994, S.USNo & S.SoNE
a" , , m alt.,
leg .All deposite din the collection of the Departrnent of Zoology, National Science Museum (Nat,
Hist.),Tokyo.

71Ie pleocalit y.Sanmori-t6ge, 570 m and 750 m in altitude at the eastern side, in Kohriyama-shi
of Fukushima Prefecture ,Northeast Japan.
Mtrther specimens examined. 2aitii ,Umao-ga-taki, 460m alt., Seishid6 ,Naganuma-machi,
Fukushima Pref,, 10-X-1993, S. UENo & S. SoNE leg. ;2a" a", 2? 4, same localit y3,1-VII-1994,
S. UENo & S, SoNE leg. ;1 g (foun ddead), Seishid6 ,560 m alt., Naganuma-machi, Fukushima Pref.,
23-XI-1993, H, OHKAwA & K, ONDA leg. ;la", 1 g, Kimen-zan, 650 m alt., Seishid6 ,Naganuma-
machi, Fukushima Pref. ,23-XI-1993, H. OHKAwA & K. ONDA leg. ;1aZ, 3\ \, same locali tbyut
590m alt., 31-VIII-1994, S. UENo & Y. NisHiKAwA leg , All deposited in the collection of the
Department of Zoolegy, National Science Museurn (Nat .Hist.) ,Tokyo.
IVbtes. The present species and T sinuatus seem to be the vicariants isolate deither by the
topographical barrier formed by the Gohyaku-gawa Valley or by the existence of the area unfavour-
able for their lives .In any case, T ancorijler is the only known representative ef the echigonis lineage
on the Nunobiki Hills.
The known habitat sof T ancorijler are separated into two groups, those on the Sanmeri-t6ge and
those in the Seishid6 area, the latte rof which are a litt lmeore than 10 km distan tfrom the former in
a southwestward direction .The specimens from the latte rpopulations are slightly different frem the
type series, They are smaller on an average (4.90-5 m.m55 in the length of body), and haye the
pronotal basal part less dilated posteriad .The parameral setae are mostly four in number instea dof
three , They are, howeyer, identica lwith the fermer in the characteristic conformation of the
aedeagal apical lobe, and can safely be regarded as belonging to 7: ancorijlir. The standard ratios in
the Umao-ga-taki specimens are as fo11ows : PWIHW 1.43-1.SO (M 1.46) ,PWIPL 1,16-1.21
(M 1.19), PWreA 1.5CF-1.56(M 1.53), PWIPB 1.38-1.45 (M 1.41), PBIPA 1.04-1.11 (M 1.08)

[PA/PBO.90-O.97(M O,92)],EWIPW 1,58-1.69(M 1.64),EL/EW 1.48-1,51(M 1.50).Those in

the Kimen-zan specimens are: PW/HW 1.43-1.50 (M 1.47) ,PWIPL 1.14-1.22 (M 1.17) ,PWIPA
1,44-1.57(M 1.51),PWIPB 1,38-1,44(M 1.41),PBIPA 1.02-1.11 (M 1.07) [PAIPBO.90-O.98 (M

094)], EWIPW 1,61-1.68(M 1.65),ELIEW 1,46-1.56(M 1.50).

At respective stations, the trechine beetl ewas dug out from the upper hypogean zone along
narrow streams shaded by deciduous broadleaved trees. Its habitat swere mostly met with at a depth
of 50 cm or more, but the habitat at the 570 m site on the Sanmori-t6ge was exceptionally shallow,
only 10-20 cm belew the surface.
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Trechiama (s.st roo.pt)erus S. UENo, sp. nov.
(Fig s7.-9, 16)
Length: 4.95-5.50 mm (fro mapical margin of clypeus to apices of elytra).
Not unlike in genera lappearance Z masatakai S. UENo <198 3p., 12, figs .6-7 ;1985, p. 75, pl,
14, fig .16) of the Za6 Mountains, but differen itn configuration of prothorax ,which is obviously less
behind hind less less laterad,
contracted with anglcs sharp and protrudent and more convex elytra
Fig. 7. 7)echiama(s. str.) oopterus S. UENo, sp. nov.,uZ, from Togamimukai of Moniwa.
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Anophthalmic nechiama from the Nunobikis and the Surroundings 155
with les soblique prehumeral borders. Decisiyel ydifferen tfrom T masatakai in configuration of
aedeagus, which indicate sthat the two species belong to diffbren tlineages,
Colour somewhat lighte rthan in Z masatakai, with yellowish brown appendages.
Head as in T masatakai, though the genae are more convex; antennae somewhat thinner than
in the latte re,ither reaching oT extending slightly beyond the middle of elytra.
Pronotum subcordate, widest at about two-thirds from base, and a litt lemore gradually
narrowed towards base than towards apex, with basal part broader than in T masatakai; sides more
evenly and les sstrongly arcuate in front and les sdeeply sinuate at about basal two-ninths than in Z
masatakai, les swidely divergent before hind angles, which are les ssharp and less protrudent laterad;
apex always narrower than base, the latte rnearly straight at middle and slightly oblique on each side;
PWIHW 1.39-1.47(M1.44),PWIPL 1.09-1.17(M 1.12),PWIPA 1.44-1.51(M1.48),PWIPB

1.34-1,40 (M 1.37) ,PBIPA 1.03-1.13 (M 1.08) [PA/PB O,89-O.97 (MO.93)] ;other pronotal
feature sas in T masatakai.
Elytra broader in both basal and apical areas than in 7: masatakai, widest at a leye lbetween
basal two-fifths and four-ninth s(usual alty about two-fifths from base), rnore convex on dorsum
especially at lateral parts ,though gently depressed on the disc; EWIPW 1.72-1.83 (M 1.77), ELIEW
1.40-1.4 5(M 1,43) ;shoulders widely rounded, with prehumeral borders slightly arcuate to the
innermost and evidently less oblique than in T masatakai; sides widely reflexed, moderately arcuate
in basal halves ,les sso behind, and rather widely rounded at apices which form a small re-entrant
angle at suture; striae as in T masatakai though less clearly punctate ,apical striole usually joini norg
almost joini nstgria 5, but sometimes joini stnriga 7 on one elytron and rarely on both the elytra; stria
5 with two setiferous dorsal pores at 116-2f9 (usual l11y5) and 3flO-4/7 (usual l11y2) from base,
respectiyely.
Ventral surface and leg sas in T masatakai.
Male genita lorgan relatively srnall and rather light lsyclerotized. Aedeagus about three-tenths
ttt////t/t///l1t1
9 / tt/tt' t ' ts, /t]/lt t/ i1liilies,,x
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KxNs-r..--1
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O,5mm

Figs. 8-9. Male genitali aof 7}echiama (s .str.) ogpterus S. UENo. sp. noy., from Togamimukai of
Moniwa; lef tlatera lview (8) ,and apical part of aedeagus, dorso-apica lyiew (9).
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NNaatitoinaolnScaieln ceSMcusieuemnce Museum
IS6 Shun-IchiUENo

as long as elytra, short, depressed ,and feebl yarcuate, with large basal part and broad flattened apical
lobe, the latte rof which is yery slightly curved yentrad; dorsal margin semicircularly rounded in
latera lview; basal part strongly curved ventrad, deeply emarginate at the sides of basal orifice, and
proyided with a large hyaline sagittal aileron; viewed dorsally ,apical lobe very broad, nearly
symmetrical, and very gradually narrowed towards apex, which is very widely rounded; viewed
laterall ya,pical lobe long and narrow, nearly parallel-sided to near the blunt tip, which is slightly
tuberculate dorsad; ventral margin slightly emarginate in profil e.Inner sac armed with a copulatory
piece at the right side of the middle and two patches of sclerotized teeth; copulatory piece about
two-sevenths as long as aedeagus, very narrow and twisted at the proximal part, dilate dapically, and
curved ventrad at the dista lpart; lef tproximal teeth-patch situated at the lef tside of the apical part
of copulatory piece ,consisting of large ,heavil ysclerotized teeth in yentral half but of small, poorly
sclerotized scales in recurrent dorsal part; dorso-apical tecth-patch smaller than the lef tproximal,
horizontal ,and lying jus itnsid eapical orifice; a compact patch of thin spine-like scales present at the
lef tside behind the heavil ysclerotized teeth-patch. Styles large and broad, lef tstyle much large rthan
the right ,each bearing four setae at the apex.
7)lp eseries. Holotype: a7',allotype: \,30-VIII-199 S4. ,UENoleg. Paratypes:4dict",1\,
sarne date, S. UENo & Y. NisHiKAwA leg . All deposite idn the collection of the Department of
Zoology,NationalScienceMuseum (Nat.Hist.),Tokyo.

7)Tpe locatit y.Togamimukai, 290 m in altitude, at Moniwa of Iizaka-machi in Fukushima-shi,
Fukushima Prefecture,NortheastJapan,

IVbtes .It was most unexpected that a species of the eehigonis lineag ein a strict sense did occur
on the southern continuation of the Za6 Mountains. It is true that Z oopterus resembles T masatakai
in general appearance, but the male genitali ae,spocially the broad apical lobe of the aedeagus, clearly
show it scloser aMnity to 71 accipitris occurring on the Shirataka Hills to the west of the Za6s. The
distanc efrom Togamimukai, the type localit yof T oopterus, to the Yoko-kawa Valley ,the southern
known locali tofy T masatakai, is 17.5 km in a north-northeastward direction, and to Sasagodaira on
Ohtaka-yama Hill ,the southern known locali toyf Z accipitris, is 29,5 km in a northwestward
direction .As was already pointed out (cf U.ENo, 1992 b, p. 32), the most archaic lineage of the
eehigonis subgroup consists of the species of the accipitris-balli-sonuta type. 7},echiam aoopterus also
belongs to this lineage ,though rather peculiar in it sfacies .As will be shown later ,this is the only
assemblage of species in the echigonis subgroup that has a wide range of distribution. All the other
lineage sare derivatiy eand more localized a,s is the ¢ ase of T cordicollis.
The type localit oyf this interesti nsgpecies lie sin the Surikami-gawa drainage at the eastern side
Ou
of the Mountain Range, or more precisely, at the right side of a narrow branch stream of the
Karasu-gawa, a tributary of the Surikami-gawa River. All the specimens known were dug out from
a loose colluyium shaded by deciduous broadleaved trees jus tabove the water edge, They were
unusually quick on their legs t,oo quick to be easily caught with an aspirator.
Record of New Localities
As was mentioned in the intreduction of this paper, the western side ef the Nunobiki Hills is
narrowly occupied by a member of the insperutus subgroup of T)'echiama. Of the three localities
hithert ofound, the southernmost one, Futamata-yama, was already recorded in a preyious paper of
mine (UENo, 1993, p. 2). On the other hand, another localit yof a trechine beetl ebelonging to the
'
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