Buprestidae of South Australia
( Jewel beetles )
by Peter J. Lang
Melobasis sordida   Blackburn, 1887
subfamily  Buprestinae » tribe  Melobasini » subtribe  Melobasina
Melobasis  species group: nervosa
Melobasis sordida   Adult images
Melobasis sordida, PL0348, female, on Acacia argyrophylla, MU, 11.0 × 4.0 mm Melobasis sordida, PL0629, on Acacia pycnantha, EP Melobasis sordida, PL0629E, male, EP, 10.2 × 3.6 mm Melobasis sordida, PL2952, from Callitris gracilis, NL, 11.0 × 3.8 mm Melobasis sordida, PL0629, on Acacia pycnantha, EP Melobasis sordida, PL0345, female, on Acacia retinodes, NL, 9.1 × 3.1 mm Melobasis sordida, PL0345, female, from Acacia retinodes, NL, 9.1 × 3.1 mm Melobasis sordida, PL0348, female, on Acacia argyrophylla, MU, 11.0 × 4.0 mm Melobasis sordida, PL0348, female, MU, 11.0 × 4.0 mm Melobasis sordida, PL0348, female, MU, 11.0 × 4.0 mm Melobasis sordida, PL0597, on Acacia retinodes, SL, 10.3 × 3.6 mm Melobasis sordida, PL1059, male, on Acacia quornensis, EP, 11.1 × 3.8 mm Melobasis sordida, PL1059, male, on Acacia quornensis, EP, 11.1 × 3.8 mm
Actual
size¹:
10.4 mm
×
3.6 mm
Measurements (mm)
malefemale
L110.3
8.15 – 12.9
n = 3610.7
9.1 – 11.95
n = 19
L210.4
9.25 – 12.4
n = 1010.7
9.9 – 11.65
n = 4
W3.6
2.9 – 4.6
n = 363.8
3.1 – 4.2
n = 19
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
Melobasis sordida  Distinctive features

Bronze (to greyish-, or red-purplish- bronze) above, with substantial areas of green below in the males. Levey 2018 pointed out that the dense tranversely 'stretched' puncta in the middle of the pronotum is a diagnostic feature of this species.

Notes

Melobasis sordida is common in the Adelaide area and over much of SA where it is found on the foliage of various Acacia species. Carter 1929 placed M. sordida in synonymy under M. simplex, but the two are distinct species and they have been assigned to different species groups by Levey 2018.

Distribution
SA Regions¹:  NUFREPNLMUYPSLSE
Australian States:  WASAVICNSWQLD
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 Melobasis sordida  (total of 155 beetles)
5 1 4
13 9 7 20
33 1 5 38
10 6 1
2
Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr May Jun
Legend
live emerged adults, count > median value of 6 per quarter month
live emerged adults, count <= median value of 6
live non-emerged adults only, for that quarter month
12
number of active beetles for that quarter month
Adult host plants
beetles sites SA regions¹ family position on host plant
Acacia pycnantha7821FR, EP, NL, MU, SL, SEF
Acacia calamifolia195FR, EP, NL, MUF
Acacia euthycarpa167FR, EP, MUF
Acacia retinodes164NL, MU, SLF
Acacia argyrophylla32MUF
Acacia ligulata31MUF
Acacia quornensis21EPF
Acacia sp.21NUF
Acacia victoriae ssp. victoriae21FRF
*Acacia baileyana11SLF
Acacia cyclops11MUF
*Acacia iteaphylla11NLF
*Acacia saligna11SEF
Acacia sp. Winged (C.R.Alcock 4936)11YPF
Beyeria lechenaultii11MUE
Callitris gracilis11MUC
Pittosporum angustifolium11MUP
Senna artemisioides ssp. petiolaris11EPF
Legendbeetlescount of beetles collected from, or sighted on, host plant taxon
sitescount of major sites (unique 10 km grid cells +/- some distinct approximate localities)
*indicates alien (non-native) plant occurrences, either wild or planted (the species may be alien in SA, or native in parts of its SA range)
Plant family
Code beetles % host plant taxa
F Fabaceae 143 98% 10
C Cupressaceae 1 1% 1
E Euphorbiaceae 1 1% 1
P Pittosporaceae 1 1% 1
Position on adult host
positionbeetlessites
on flowering plant43
on foliage or non-flowering plant14237
on plant (unspecified)43
Larval host plants
individuals sites SA regions¹ family adult ex billet
Acacia spilleriana11MUF1
Acacia wattsiana11NLF1
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 2 100% 2
Position in larval host
positionindividualssitesadult ex billet
dead stem222
Host plant notes

The adults are foliage-feeders and have been found on a number of different Acacia species. I reared adults of M. sordida from billets cut from the dead stems of two different Acacia species: one individual from Dog Wattle A. wattsiana and one from A. spilleriana. It is likely to breed in many other Acacia species.

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.