Morphology and identification of the mature larvae of several species of the genus Otiorhynchus (Coleoptera, Curculionidae, Entiminae) from Central Europe with an update of the life history traits
Author
Rafał Gosik
Author
Peter Sprick
Author
Jiří Skuhrovec
Author
Magdalena Deruś
Author
Martin Hommes
text
Zootaxa
2016
4108
1
1
67
journal article
39126
10.11646/zootaxa.4108.1.1
015bce14-fc37-4afb-b997-4b1e974770f9
1175-5326
265725
B802F2B1-944E-4B84-A856-8091E60D88FC
Key to larvae of selected
Otiorhynchus
species
In this key, we included all species described in this paper and all species hitherto described, if chaetotaxy was considered sufficiently:
Otiorhynchus ligustici
,
O
. porcatus
,
O
. salicicola
(see
Gosik & Sprick 2012a
),
O
. nodosus
(see
Willis 1964
) and
O
. cribricollis
(see
Grandi 1913
),
Lockwood & Keifer (1930)
and
Rosenstiel (1987)
. Further comments are reported in the following chapter.
1.
Prs
and
pds1
,
2,4
on abdominal segment I short, filiform, and
pds3,5
long or very long (
Figs. 156–171
).................... 2
-
Prs
and
pds1
,
2,4
on abdominal segment I thorn-like, dark brown, and
pds3,5
, filiform, medium long (
Fig. 155
)............................................................................
O
.
(
Cryphiphorus
)
ligustici
(Linnaeus)
(
Fig. 205
)
2. Postdorsum on metathorax with 5
pds
(
Figs. 172–174
)........................................................ 3
- Postdorsum on metathorax with 4
pds
(
Figs. 175–186
)....................................................... 6
3.
Pds3
on metathorax 2 times shorter than
pds2
(
Fig. 172
).
Pds1
on abdominal segment I almost as long as
pds2
and
pds4
(
Fig. 156
).
Ds2
on abdominal segment IX distinctly longer than
ds1
and
ds3
(
Fig. 188
). Postlabium covered by cuticular processes..................................................................................................... 4
- Pds3
on metathorax visibly longer than
pds2
(
Figs. 173, 174
).
Pds1
on abdominal segment
I 2–3
times as long as
pds2
and
pds4
(
Figs. 157, 158
).
Ds2
on abdominal segment. IX shorter than
ds1
and
ds3
(
Figs. 189, 190
). Postlabium smooth, covered by cuticular processes....................................................................................... 5
4. Pronotum with 7
prns
, each thoracic segment with 5
pda
, setae fine, rather short (
Fig. 2
)...................................................................................
Otiorhynchus
(
Arammichnus
)
indefinitus
Reitter
(
Fig. 203
)
- Pronotum with 9
prns
, each thoracic segment with 7
pda
, setae well visible, relatively massive.............................................................................................
O
.
(
Arammichnus
)
cribricollis
Gyllenhal
5.
Pds1
and
pds2
on metathorax equal in length (
Fig. 173
). Meso- and metathorax with 2
as
. Body greyish to brown, cuticle espe- cially on dorsal part covered with triangular cuticular processes and more pigmented than on lateral and ventral parts. Head dark brown, almost rounded. Surfaces of labrum densely covered by thorn-like cuticular processes......................................................................................
O
.
(
Choilisanus
)
raucus
(Fabricius)
(
Fig. 204
)
-
Pds1
on metathorax 3 times longer than
pds2
(
Fig. 174
). Meso- and metathorax with 1
as
. Body white to yellowish, cuticular processes very fine. Head light yellow, distinctly narrowed bilaterally. Surface of labrum smooth........................................................................................
O
.
(
Pendragon
)
ovatus
(Linnaeus)
(
Fig. 217
)
6. Meso- and metathorax with 4
pds
, identical in length (
Figs. 175–183
; 175a–183a)................................... 7
- Meso- and metathorax with 4
pds
, different in length (
Figs. 184–187
; 184a–187a).................................. 15
7. Meso- and metathoracic
pds1
and
pds2
equal in length (or almost equal length), both distinctly shorter than
pds3
(
Figs. 176–183
)........................................................................................... 8
- Meso- and metathoracic
pds1
as long as
pds3
, both distinctly longer than
pds2
(
Fig. 175
)...............................................................................................
O
.
(
Pocodalemes
)
crataegi
Germar
(
Fig. 218
)
8. Abdominal segment VIII with 5
pds
(3 short and 2 long)...................................................... 9
- Abdominal segment VIII with 4
pds
(2 short and 2 long) (Fig. 199)..
O
.
(
Metopiorrhynchus
)
singularis
(Linnaeus)
(
Fig. 208
)
9. Abdominal segments I–VII with only 1 long
sps
(Figs. 191, 192)............................................... 10
- Abdominal segments I–VII with 1 long and 1 minute
sps
(Figs. 193–197)....................................... 11
10. Head light yellow. Body slender, milk-white. Clypeus with 1
cls
(
Fig. 63
)....
O
.
(
Otiorhynchus
)
armadillo
(Rossi)
(
Fig. 210
)
- Head dark yellow. Body rather massive, yellowish. Clypeus with 2
cls
.......
O
.
(
Otiorhynchus
)
salicicola
Stierlin
(
Fig. 216
)
11.
Lms2
slightly longer (maximum 1.33 times) than
lms1
and
lms3
(
Figs. 85
,
96
,
107
,
118
).............................. 12
-
Lms2
distinctly longer (2 times) than
lms1
and
lms3
(
Fig. 74
).................
O
.
(
Otiorhynchus
)
aurifer
Boheman
(
Fig. 211
)
12. Setae of abdomen fine, transparent...............................
O
.
(
Otiorhynchus
)
meridionalis
Gyllenhal
(
Fig. 212
)
- Setae of abdomen rather massive, brown or dark yellow....................
O
.
(
Otiorhynchus
)
tenebricosus
complex. 13
13.
Eps2
on abdominal segment I–VIII distinctly longer than
eps1
(at least 2 times, usually 3 times or more) (Fig. 197).
Pms3
dis- tinctly shorter than
pms1
and
pms2
(
Fig. 121
).....................................
O
. lugdunensis
(Herbst)
(
Fig. 215
)
-
Eps2
on abdominal segment I–VIII slightly longer than
eps1
(no more than 2 times, usually 1.33 times or less) (Figs. 195, 196).
Pms3
slightly shorter or of the same length as
pms1
(
Figs. 99
,
110
)............................................. 14
14.
Pms3
as long as
pms1
(
Fig. 99
). Pronotum with 4 long and 4 medium long
prns
(
Fig. 90
)...
O
. clavipes
(Bonsdorff)
(
Fig. 213
)
-
Pms3
slightly shorter than
pms1
(
Fig. 101
). Pronotum with 4 long and 5 medium long
prns
(
Fig. 110
)...............................................................................................
O
. fuscipes
(Olivier)
(
Fig. 214
)
15. Abdominal segment VIII with 4 (2 long and 2 short)
pds
(Figs. 197, 199)........................................ 16
- Abdominal segment VIII with 5 (2 long and 3 short)
pds
(
Fig. 28
).............................................. 17
16. Labral rods short, reniform (
Fig. 53
). Epipharynx with nodular cuticular processes. Clypeus with 2 very short, poorly visible
cls
(
Fig. 53
)......................................................
O
.
(
Nehrodistus
)
armatus
Boheman
(
Fig. 209
)
- Labral rods elongated (
Fig. 152
). Epipharynx covered by thorn-like cuticular processes. Clypeus with 2 medium long
cls
(
Fig. 152
).........................................................
O
.
(
Zustalestus
)
rugosostriatus
(Goeze)
(
Fig. 219
)
17. Setae on body elongated, fine, transparent. Body elongated. Abdominal segment IX mostly with 4
ds
(Fig. 201)......... 18
- Setae on body relatively massive, yellow or brownish. Body moderately elongated. Abdominal segment IX with 3
ds
(Fig. 202).......................................................... ..
O
.
(
Dorymerus
)
sulcatus
(Fabricius)
(
Fig. 206
)
18. Clypeus with 1 medium long seta and 1 sensillum.............................
O
.
(
Postaremus
)
nodosus
(
O
.F. Müller)
- Clypeus with 2 setae and 1 sensillum...................................
O
.
(
Lolatismus
)
porcatus
(Herbst)
(
Fig. 207
)