A Revision of the Genus Hemicrepidius Germar, 1839 (Coleoptera: Elateridae) of the New World, with Comments on Global Classification
Author
Etzler, Frank E.
text
The Coleopterists Bulletin
2020
mo 18
74
1
126
https://www.mendeley.com/catalogue/ca46f89e-ea1b-370d-bd4c-8a9aefff0b3f/
journal article
10.1649/0010-065X-74.mo18.1
1938-4394
4906771
E8A1F6BE-934A-41D1-8211-90DE1FD565BF
Hemicrepidius brooksi
Etzler
,
new species
zoobank.org/
urn:lsid:zoobank.org:act:
8AE09735-D23D-43B3-96E3-E03984D7C738
(
Figs. 12a–e
,
14a
)
Hemicrepidius
sp. A
:
Brooks 1960: 32
.
Hemicrepidius
sp. A
nr.
carbonatus
:
Seibert 1993
.
Diagnosis.
Hemicrepidius brooksi
can be distinguished from all other species of
Hemicrepidius
by the sinuate posterior margin of the hypomeron, nearly straight prosternal process, a mesoventral cavity with edges slightly raised ventrally in a near 90-degree angle and visible anteriad mesocoxae in lateral view, punctures on the pronotal disc never separated by less than 0.5× diameter of a puncture, and aedeagus with parameres subparallel on basal half and gradually narrowing towards base of sharply acute (<45°) pre-apical expansions, with apex of paramere acute.
This species is most similar to
H
.
carbonatus
and
H
.
soccifer
. From
H
.
carbonatus
, it can be distinguished by the generally smaller size, the pronotal punctures on the disc never separated by less than 0.5× diameter of a puncture, the ventrally raised edges of the mesoventral cavity so they are visible anteriad of the mesocoxae in lateral view, and the aedeagal parameres with the point of apical expansion narrower. From
H
.
soccifer
, it can be separated by metacoxae that have the ventral plate having an approximately 120-degree angle at midpoint before becoming very narrow laterally, and by the narrower apical point on the apical expansion of the aedeagal paramere. Molecular data also serve to separate
H
.
brooksi
from
H
.
soccifer
(
Figs. 1–3
).
Description.
Length 10.5–15.0 mm, width 2.0–4.0 mm; color dark brown to black, elytra not contrasting; pronotum, legs, antennae and edges of abdominal ventrites often slightly paler; integument shining. Setae moderately long, suberect, brownblack to black.
Head:
Punctures subumbilicate, nearly contiguous, often with impunctate areas over antennal insertions; frons weakly concave anteromedially in dorsal view, some with slight triangular impression medially in dorsal view; frontal carina broadly rounded when viewed from the front, complete; frontoclypeal region absent medially, at most weakly projecting in lateral view; eyes moderate, ocular index 70–80 (
n
= 4); antenna serrate, antennomere 2 spherical, about as long as wide, antennomere 3 subtriangular, 2× length of 2, setae intermediate between 2 and 4, but more similar to 2, antennomere 3 subequal in length to 4, basal antennomeres wider than apical antennomeres, from 1.5× longer than wide to about 3× longer than wide, antennomeres 4–11 with subtle medial line bearing less setae than edges, antennomere 11 with tip constricted, sometimes as a pseudosegment, antenna just reaching pronotal posterior edge to extending past it by 2 antennomeres.
Prothorax:
Pronotum 1.1–1.2× wider than long, widest at hind angles or just anterior of midlength; sides weakly arcuate, gradually narrowing anteriorly, in some slightly deplanate laterally; hind angles slightly divergent, dorsal carina present, directed anteromedially; punctures on disc small to moderate, smaller than punctures on head, subumbilicate when viewed at 40×, separated by one diameter of puncture on disc to nearly touching in males, punctures closer and larger laterally, nearly contiguous and clearly subumbilicate; posterior edge with sublateral notches. Hypomeron with subumbilicate punctures, smaller than lateral pronotal punctures, nearly contiguous anteriorly and becoming less dense posteriorly, small semicircular impunctate area often present on posterior onesixth; posterior edge sinuate with hind angle visible in ventral view (
Fig. 12c
). Prosternum with punctation smaller than that of hypomeron, simple, punctures nearly touching laterally, much less dense medially, separated by over two puncture diameters; anterior lobe straight to very slightly deflexed, broadly rounded, not covering to partially covering ventral mouthparts; prosternal process slightly curved dorsad between procoxae, sometimes impunctate between procoxae, thickened, extending straight past procoxae in lateral view.
Pterothorax:
Mesoventral cavity with lateral edges slightly raised ventrally in 90-degree angle, visible anteriad of mesocoxae in lateral view; posterior edge of cavity truncate. Metaventrite with punctures simple, smaller than punctures on hypomeron, dense laterally, nearly touching, less dense medially, separated by one to two puncture diameters. Scutellar shield elongate, about twice as long as wide, narrowly rounded posteriorly, sides sinuate, dorsal surface flat to weakly convex, anterior margin nearly straight, setae radiating from midline, similar in size and color to setae on pronotum and elytra. Elytral striae weakly impressed basally; interstriae flat to slightly convex, punctures small, scattered, giving wrinkled appearance; basal carina simple. Legs with lobe on tarsomere 3 largest, wider than tarsomere, lobe on tarsomere 2 second largest, narrow, lobe on tarsomere 1 small, lobe of tarsomere 4 smallest, both lobes on 1 and 4 narrow, visible in lateral view.
Abdominal ventrites:
Punctures simple, smaller than punctures on metaventrite, moderately dense, separated by one puncture diameter, less dense medially; fifth ventrite broadly rounded; side of each ventrite with microserrations.
Male genitalia
(
Figs. 12d, e
): Parameres subparallel laterally on basal half, weakly sinuate laterally and gradually narrowing basal to pre-apical expansion, pre-apical expansion coming to narrow, acute point (<45°); apex of paramere narrowly rounded and membranous, dense setose patch ventrally near preapical expansion, with about 6 apical dorsal setae. Median lobe narrow, constricted on apical half, basal struts curved latero-basally. Basal piece with membranous area broadly rounded medially in ventral view.
Etymology.
The specific name is in honor of the late Arthur Robinson Brooks of
Saskatchewan
for his early recognition that this species was undescribed.
Distribution.
Specimens have been examined from the following states and provinces:
CANADA
: AB;
UNITED STATES
: CO, ID, MT, OR, UT, WA, WY (
Fig. 14a
).
Notes.
This species has been previously confused with
H
.
carbonatus
. The diagnosis above and the key to species should enable this species to be correctly identified. One specimen from
Utah
(MTEC023702) is quite distinct from the other specimens included in the trees (
Figs. 1–3
), but is represented by only a single sequence, the CO1 barcode region, which is 97% identical to the
Montana
specimens. However, no other characters exist to accurately separate this specimen from all the others, so it is included here under the heading “other specimens examined.” The discovery of additional specimens from populations between
Montana
and
Utah
may lessen this apparent gap.
Hemicrepidius brooksi
is sometimes easy to confuse with darker forms of
H
.
soccifer
, but these two species are readily separated by DNA data (
Figs. 1–3
).
Larvae have been associated with
H
.
brooksi
(
Etzler
et al.
2014
, as
Hemicrepidius
sp.
nr.
carbonatus
), but they remain undescribed.
Holotype
.
UNITED STATES
:
Montana
:
Glacier Co.
, N
. Cutbank,
Eney Farms Rd
,
48.8799°N
,
112.3000°W
,
16-Jul-28-Aug-2015
, Hart, Etzler,
Vane Trap
, ETOH; male, from MTEC on permanent loan to CASC; DNA data under barcode MTEC023711,
Fig. 12a
.
Paratypes
(91). NORTH AMERICA:
Calvary
[
sic
?], 95-215/ 29 (1,
BMNH
)
;
CANADA
:
Alberta
:
Calgary
, H. G. W.,
VII-1910
/
G. Bryant
coll. 1919-147 (1,
BMNH
)
;
Caldary
,
VII-6-1921
, O.
Bryant
(1,
CASC
)
;
Cardston
,
9 July 1991
, H. W.
Ziolkowski
(1,
CESC
)
;
St. Mary River
, 6-7-[19]23, R. D.
Bird
(1,
MCZC
,
MCZ-ENT00641966
)
;
CFB
Shuffield
,
Casa Berardi Sect.
, short grass prairie,
G. E. Ball
, A. T.
Finnamore
/
50°23’N
110°35’W
,
Sentry Shack Tr.
, 94-04 night,
June 28, 1994
(2,
ERFC
)
;
as previous except: evening-daylight, 94-06,
29-vi-1994
(1,
ERFC
)
;
Writing-On-Stone
Prov. Pk.
, sedge south,
28-vi-5-vii-1990
, D. B.
McCorquodale
(1,
ERFC
)
;
Writing-On-Stone
Prov. Park
,
18-25-vii-1990
,
Creek Shrub South
, D.
McCorquodale
(1,
ERFC
)
.
UNITED STATES
:
Colorado
:
[no data] (1,
MCZC
, MCZ- ENT00641982)
;
[
Chaffee Co.
],
Salida
/
July
/ A.
Fenyes
collection (1,
CASC
)
;
[
County
?],
Chimney Gulch
/
Liebeck
collection (1,
MCZC
, MCZ- ENT00642002)
;
La Plata Co.
, Vicinity of Durango,
55-7000ft
, July-
23-Aug-1885
/
F. C. Bowditch
coll. (1,
MCZC
,
MCZ-ENT00641983
)
;
[
County
?];
Mt. Lookout
,
7000ft
/
Golden
, VII-10- [19]11, C. A.
Frost
(1,
MCZC
, MCZ- ENT00641975)
;
Pitkin Co.
,
4mi
SW Aspen
,
VIII- 6-1964
/
J. S. Buckett
collector (1,
CASC
)
;
[
Routt Co.
],
Steamboat Springs
,
VI-1943
, VII-15-[19]45, O.
Bryant
(2,
CASC
)
.
Idaho
:
[
Bear Lake Co.
],
Paris
/
C. Lynn Hayward
collector (1,
BYUC
)
;
[
Cassia Co.
],
Oakley
,
June-1928
/
D. Elden Beck
collector (1,
CASC
)
;
Latah Co.
,
Moscow
,
Aug-5- 1953
,
W. F. Barr
collector/ at light (1,
FSCA
)
;
[
Twin Falls Co.
],
Twin Falls
,
July-30-1927
,
V. E. Romney
col (1,
MTEC
)
.
Montana
:
Beaverhead Co.
,
7-11- 1928
/ E26-416 (1,
MTEC
)
;
Dillon
, 7-13-[19]36/
William
L.
Jellison
(1,
MTEC
)
;
Broadwater Co.
,
Canyon Ferry Wildlife Mngt. Area
,
N of Townsend
/
22-June-1988
, C. E.
Seibert
(1,
MTEC
)
;
[
Flathead Co.
?],
East Flathead
,
July-25-1902
/ elev 5700 (1,
MTEC
)
;
Gallatin Co.
,
6-24-1951
,
7-23-1951
,
Student Collector
(2,
MTEC
)
;
Bridger Range
,
5mi
NE Bozeman
,
30-June-1988
, M. M.
Hooten
(1,
MTEC
)
;
Bridger Canyon
,
Stone Creek
,
18-VI- 1988
, T. K.
Philips
(1,
MTEC
[
Figs. 12d, e
])
;
Bridger Cr
, 4800’,
3-Jul-1987
, D. L.
Gustafson
, col (1,
MTEC
)
;
Gallatin Val.
,
July-9-1903
(1,
MTEC
)
;
Bozeman
,
June-16-1909
(1,
MTEC
)
;
Boze
[man], Aug-1-[19]46,
Underdahl
(1,
MTEC
)
;
Bozeman
,
7- 6-1946
,
Howard
collector (1,
MTEC
)
;
4.8 mi
W of Bozeman
,
VI-26-1986
, R. S.
Lang
colr (1,
MTEC
)
;
Greycliff Fish. Acc.
,
Madison R.
,
11 July 1991
, P. M.
Denke Collector
(1,
CESC
)
;
3mi
NE Three Forks
,
Madison
R. overflow
pitfall
, elev.
4050ft
,
22 Jun to 20 Jul 1988
/ C. E.
Seibert Colr.
(1,
CESC
)
;
Talc Rd.
E
Three Forks
,
pitfall
, elev.
4050ft
,
22-Jun- 20-Jul-1988
, C. E.
Seibert Colr
(1,
MTEC
)
;
5 mi
S Three Forks
, DCP site,
pitfall
,
15-29 July 1997
, C. E.
Seibert Colr
(1,
CESC
)
;
Fort Ellis Research Farm
,
45.6674°N
,
110.9779°W
, May-Aug-
2011, 4905ft
, P. S.
Gill
,
WW canister trap
(1,
MTEC
; DNA—
MTEC008111
)
;
Hill Co.
,
Beaver Creek
,
6300ft
, S. J.
Hunter
,
August-1913
(2,
SEMC
)
;
1 mi
E Big Sandy
,
20-July-1996
, M. A.
Ivie
and R. L.
Hurley
, on roadside milkweed (1,
MTEC
)
;
Madison Co.
, 2.5km ENE
Norris
,
Red Bluff
,
pitfall
,
22 Jul-5 Aug 1997
, C. E.
Seibert
colr (2,
CESC
)
;
Hidden Lake Bench
, 7400’
22-July-1989
,
D. L. Gustafson
col (1,
MTEC
)
;
Hidden Lake Bench
, 7400’,
pitfall trap
,
12-Aug-1-Sep-1990
, R. T.
Ryti
colr (1,
MTEC
)
;
ponds near
Hidden Lake
,
26-July-1991
,
D. L. Gustafson
col. (1,
MTEC
)
;
Trudau Warm Sp.
,
09-July-1993
,
D. L. Gustafson
col (1,
MTEC
)
;
Madison Co
[Sweetgrass county?],
Madison R.
,
Greycliff
,
25 vii 1989
, H. W.
Ziolkowski Colr.
(1,
CESC
)
;
Park Co.
,
Carters Bridge
, S of
Livingston
,
Yellowstone
R/
9-VII-1988
, H. W.
Ziolkowski
(1,
MTEC
)
;
Toole Co.
,
5 mi
S Shelby
,
Marias
R., L. funnel,
3060ft
,
18-Jun-21-Jul-1988
, C. E.
Seibert Colr
(1,
MTEC
)
;
Wheatland Co.
,
Two Dot
,
Musselshell
R.,
pitfall
, elev.
4600ft
,
28-Jun-24-Jul-1988
,
C. E. Seibert
colr (1,
MTEC
[
Fig. 12b
]).
Oregon
:
[Baker Co.],
Farewell Bend
,
Snake R.
, VI-18-[19] 41 (1,
OSAC0000551187
)
;
[
Umatilla Co.
],
Freewater
,
4mi
N Milton
,
VII-11-1963
, coll.
J. A. Osanger
(2,
MTEC
)
.
Utah
:
[
Sanpete Co.
],
Milburn
, 7-1920/
Vasco M. Tanner
collector (1,
CASC
)
;
[
Tooele Co.
],
Stockton
, VII-8-[19]13,
Tom Spalding
(1,
CASC
)
.
Washington
:
[
Columbia Co.
],
Dayton
,
7-2-1933
,
L. T. Turner
col (1,
WSUC
)
;
Yakima Co.
,
Parker
,
BL Trap
, 1977,
J. F. Howell
coll. (1,
WSUC
)
;
[
Walla Walla Co.
],
College Place
, VI-20-[19]44, VI-29-[19]44, VI-4-[19]46, VII-1- [19]46, VII-8-[19]46, G. H.
Nelson
(5,
FSCA
)
;
Walla Walla
, 6-10-[19]40 (7,
OSAC0000551179
–
OSAC0000551184
,
OSAC0000551186
)
;
Walla Walla
,
6-4-1926
,
8-25-1926
, M. W.
Stone
(2,
CASC
)
;
Walla Walla
, 4-27-[19]31, 6-8-[19]31, 6- 21-[19]31,7-3-[19]31, 7-9-[19]31, 7-23-[19]31, D. H.
Brannon
(2,
CASC
; 6,
WSUC
)
;
Walla Walla
,
July-8-1938
,
July-30-1938
, H. P.
Lanchester
(4,
WSUC
)
.
Wyoming
:
Carbon Co.
,
Vic Battle Creek Cpgd
, 7400-8000’,
Med Sow
NF, leg:
C.D.
F. 25- VII-[19]78 (1,
FSCA
)
;
[
Lincoln Co.
],
Kemmerer
, VII-20-[19]54, G. T.
Knowlton
(1,
SEMC
)
;
[
Sweetwater Co.
],
Green River City
,
6-7,000ft
,
July-20-27-1877
/
F. C. Bowditch
coll. (1,
MCZC
,
MCZ-ENT00641976
)
;
Teton Co.
,
Grand Teton Nat’
l
Park
, ½ mi ESE
Jackson Lk. Jct.
,
43.8613°N
,
110.5604°W
,
06-Aug-1999
, K. A.
Keating
(4,
MTEC
; DNA—MTEC023713 [
Fig. 12c
])
;
Grand Teton Nat’
l
Park
,
Snake R.
floodplain E. of the
Potholes
,
2104m
,
43.7754°N
,
110.5972°W
,
07- Aug-1999
, K. A.
Keating
(1,
MTEC
)
;
Yellowstone
, VII-[19]35, J. H.
Blum
(1,
CASC
)
.
No
locality:
(5,
INHS830317
–
INHS830320
,
INHS830322
)
.
Other Specimens Examined (27).
UNITED STATES
:
California
:
Inyo Co.
, Death
Valley Nat’
l
Monument
,
Telescope Peak
, 10000’ altitude/
6-VII- 1970
, collector
Derham Giuliani
(1,
CASC
)
.
Colorado
:
[
Delta Co.
],
Paonia
,
7-2-1931
/
C. M. Drage
collector (1,
CASC
)
;
[
Larimer Co.
],
Ft. Collins
, 9- 27/
K. L. Maehler
collection (1,
CASC
)
;
[
Teller Co.
?],
Fossil
, 7-23-[19]11 (1,
OSAC0000836964
)
.
Idaho
:
[
Canyon Co.
],
Parma
,
7-18-1928
, alt
2224ft
/
Paul Rice
(1,
BMNH
)
;
Parma
,
6-12-1936
, alt
2224ft
/
V. E. Nygren
(1,
BMNH
)
.
Montana
:
Gallatin Co.
, M
Picnic Area
(near
Bozeman
),
30-VI- 1988
,
S. M. Clark
(1,
BYUC
)
.
Oregon
:
[County?]
Hood Riv.
,
July-8-1927
/
E. C. Van Dyke
collector (1,
CASC
)
;
[
Gilliam Co.
],
Mayville
,
June-21-1938
, M. H.
Hatch
(1,
OSAC0000551362
)
;
Harney Co.
,
Burns
,
3-Aug-1998
,
Leg. D. Delaney
and
A. Sohns
(1,
OSAC0000541457
)
;
Union Co.
,
La
grande, ENV [?],
Jul-3-1969
/
M. W. Hastriter
(1,
BYUC
)
.
Utah
:
Garfield Co.
,
Boulder Creek
,
Boulder
, near
Hwy
12,
37°54’30”N
,
111°25’20”W
,
2-July-2001
, D. J.
Cavan
,
K. F. Kuehnl
#112, blacklight (1,
BYUC
; DNA—
MTEC023702
)
;
[
Tooele Co.
],
Stockton
, VII-24-[190]6, VII-21-[19]13,
Tom Spalding
(1,
CASC
; 1,
MCZC
,
MCZ-ENT00641987
)
;
Uintah Co.
15 mi
N Tridell
,
23-July-1970
,
J. L. Perry
(1,
BYUC
)
;
[
Utah Co.
],
Provo
, VII-11-[19]12,
Tom Spalding
(1,
CASC
)
.
Washington
:
Walla Walla Co.
, 1939,
Glen Oxford
[?] (1,
WSUC
)
;
Walla Walla
, VI-3-[19]36/
G. E. Bohart
collector (1,
CASC
)
;
Walla Walla
,
July-8-1938
,
H. P. Lanchester
(7,
WSUC
)
;
Walla Walla
, 6-10-[19]40 (1,
OSAC0000551185
)
.
Yakima Co.
,
Parker
,
BL Trap
, 1977,
J. F. Howell Coll
(1,
WSUC
)
.