Buprestidae of South Australia
( Jewel beetles )
by Peter J. Lang
Ethonion cf. corpulentum Small  
subfamily  Agrilinae » tribe  Coraebini » subtribe  Ethoniina
Ethonion cf. corpulentum Small   Adult images
Ethonion cf. corpulentum Small, PL4552A, male, on Eutaxia microphylla (for photo), SE, 6.6 × 2.8 mm Ethonion cf. corpulentum Small, PL4552A, male, on Eutaxia microphylla (for photo), SE, 6.6 × 2.8 mm Ethonion cf. corpulentum Small, PL4168A, male, EP, 7.4 × 3.3 mm Ethonion cf. corpulentum Small, PL4168B, female, EP, 8.2 × 3.6 mm Ethonion cf. corpulentum Small, PL4168A, male, EP, 7.4 × 3.3 mm Ethonion cf. corpulentum Small, PL4552A, male, on Eutaxia microphylla (for photo), SE, 6.6 × 2.8 mm Ethonion cf. corpulentum Small, PL4552A, male, on Eutaxia microphylla (for photo), SE, 6.6 × 2.8 mm
Actual
size¹:
7.5 mm
×
3.2 mm
Measurements (mm)
malefemale
L17.0
6.35 – 7.5
n = 67.8
7 – 8.5
n = 12
L26.9
6.3 – 7.4
n = 67.6
6.95 – 8.4
n = 12
W3.0
2.75 – 3.25
n = 63.3
2.95 – 3.75
n = 12
Legend  L1length from clypeus/frons to elytral apex (mean, range, sample size)
L2length from anterior of edge of eyes to elytral apex
Wmaximum width with elytra fully closed
Ethonion cf. corpulentum Small  Distinctive features

Differs from E. corpulentum in its smaller size, less elongate body shape, shorter aedeagus, and use of a specific larval host plant.

Notes

This entity, which appears to be a distinct species, has only been recently recognised in SA following the discovery of its larval host plant. Some museum specimens of this species have been previously identified as E. maculatum but the occurrence of that species in SA is uncertain.

Like E. corpulentum it has globular rather than elongate-shaped galls and the older larvae are usually folded into a 'U' shape within them. Unlike the larval host of E. corpulentum this species' host is not rhizomatous, and the galls are often borne on the surface of the much thicker root crown and upper root.

Distribution
SA Regions¹:  EPMUSE
Australian States:  SA+?
Southern South Australia distribution
LegendP.J.Lang collection vouchered records
other private collection or museum specimens, or sightings
Satellite map
Terrain map
Enlarge map
Adult activity records for Ethonion cf. corpulentum Small  (total of 2 beetles)
2
Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr May Jun
Legend
live emerged adults, count > median value of 2 per quarter month
live emerged adults, count <= median value of 2
live non-emerged adults only, for that quarter month
12
number of active beetles for that quarter month
Adult host plant
beetles sites SA regions¹ family position on host plant
Eutaxia microphylla21SEF
Legendbeetlescount of beetles collected from, or sighted on, host plant taxon
sitescount of major sites (unique 10 km grid cells +/- some distinct approximate localities)
Plant family
Code beetles % host plant taxa
F Fabaceae 2 100% 1
Position on adult host
positionbeetlessites
on flowering plant21
Ethonion cf. corpulentum Small Breeding record images
Ethonion cf. corpulentum Small, PL3966, larva, in Eutaxia microphylla (PJL 3211) dissected root crown gall, EP Ethonion cf. corpulentum Small, PL3966, larva, in Eutaxia microphylla (PJL 3211) dissected root crown gall, EP Ethonion cf. corpulentum Small, PL4167, larva, in Eutaxia microphylla (PJL 3301) root crown gall, before dissection, EP Ethonion cf. corpulentum Small, PL4167, larva, in same Eutaxia microphylla (PJL 3301) root crown gall, dissected, EP Ethonion cf. corpulentum Small, PL4168, non-emerged adult, in Eutaxia microphylla (PJL 3301) dissected root crown gall, EP Ethonion cf. corpulentum Small, PL4175, non-emerged adult, in Eutaxia microphylla (PJL 3303E) stem base gall, SE, photo by A.M.P. Stolarski Ethonion cf. corpulentum Small, PL4175, non-emerged adult, in Eutaxia microphylla (PJL 3303) stem base gall, SE, photo by A.M.P. Stolarski Ethonion cf. corpulentum Small, PL4175, non-emerged adult, in Eutaxia microphylla (PJL 3303) stem base gall, SE, photo by A.M.P. Stolarski Ethonion cf. corpulentum Small, PL4168A, male, non-emerged adult, from Eutaxia microphylla (PJL 3301) dissected root crown gall, EP, 7.4 × 3.3 mm Ethonion cf. corpulentum Small, PL4233, dead non-emerged adult, from Eutaxia microphylla (PJL 3340) root crown gall, EP Ethonion cf. corpulentum Small, PL3966, larval host plant, host Eutaxia microphylla (PJL 3211), EP, hatched and unhatched subterranean galls Ethonion cf. corpulentum Small, PL3966, larval host plant, host Eutaxia microphylla (PJL 3211), EP, hatched and unhatched subterranean galls Ethonion cf. corpulentum Small, PL3966, larval host plant, host Eutaxia microphylla (PJL 3211), hatched galls, EP Ethonion cf. corpulentum Small, PL3966, larval host plant, host Eutaxia microphylla (PJL 3211), unhatched galls, EP Ethonion cf. corpulentum Small, PL4168, larval host plant, host Eutaxia microphylla (PJL 3301), unhatched root crown galls, EP Ethonion cf. corpulentum Small, PL4175, larval host plant, host Eutaxia microphylla (PJL 3303A) with stem base galls, SE, photo by A.M.P. Stolarski Ethonion cf. corpulentum Small, PL4175, larval host plant, host Eutaxia microphylla (PJL 3303A), showing hatched stem base gall, SE, photo by A.M.P. Stolarski Ethonion cf. corpulentum Small, PL4175, larval host plant, host Eutaxia microphylla (PJL 3303E), unhatched root crown galls, SE, photo by A.M.P. Stolarski Ethonion cf. corpulentum Small, PL4235, larval host plant, host Eutaxia microphylla (PJL 3345), single plant with 33 galls, EP Ethonion cf. corpulentum Small, PL4235, larval host plant, host Eutaxia microphylla (PJL 3345), single plant with 33 galls, EP Ethonion cf. corpulentum Small, PL4235, larval host plant, host Eutaxia microphylla (PJL 3345), single plant with 33 galls, EP
Larval host plant
records sites SA regions¹ family adult liveadult deadlarvagall (only)
Eutaxia microphylla9213EP, MU, SEF15112442
Legendrecordscount of breeding adults, pupae and larvae
sitescount of major sites (unique 10 km grid cells +/- some distinct approximate localities)
adultlive = extracted alive;   dead = extracted dead as intact or fragmentary remains;   ex billet = reared and emerged from stored sections of host;   ex pupa = reared from sampled pupa
pupaextracted pupa;   pupa ex larva = reared pupa from larva
larvaextracted larva (any stage including prepupa)
gall (only)hatched or unhatched gall identified by form and position rather than contents
Plant family
Code records % host plant taxa
F Fabaceae 92 100% 1
Position in larval host
positionrecordssitesadult liveadult deadlarvagall (only)
root gall11329
root crown gall7211791541
stem base gall9281
Host plant notes

To date, galls of this species have only been found on the upper roots and root crowns of Small-leaf Euxtaxia Eutaxia microphylla.

¹ LegendregionsSA State Herbarium regions (map)
EA: Eastern, EP: Eyre Peninsula, FR: Flinders Ranges, GT: Gairdner-Torrens, KI: Kangaroo Island, LE: Lake Eyre, MU: Murray, NL: Northern Lofty, NU: Nullarbor, NW: North-Western, SE: South-Eastern, SL: Southern Lofty, YP: Yorke Peninsula
sizeThe ellipse is the correct size when printed, indicative on a desktop screen, and likely to be wrong on a mobile device.