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:
7.6 mm
×
3.3 mm
Measurements (mm)
malefemale
L17.0
6.35 – 7.5
n = 57.9
7 – 8.5
n = 10
L27.0
6.3 – 7.4
n = 57.8
6.95 – 8.4
n = 10
W3.0
2.75 – 3.25
n = 53.4
2.95 – 3.75
n = 10
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
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
individuals sites SA regions¹ family adult liveadult deadlarvagall (only)
Eutaxia microphylla5910EP, MU, SEF1561820
Legendindividualscount 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 individuals % host plant taxa
F Fabaceae 59 100% 1
Position in larval host
positionindividualssitesadult liveadult deadlarvagall (only)
root gall10219
root crown gall43895920
stem base gall616
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.