Buprestidae of South Australia
( Jewel beetles )
by Peter J. Lang
Melobasis occidentalis   Carter, 1923
subfamily  Buprestinae » tribe  Melobasini » subtribe  Melobasina
Melobasis  species group: obscurella
Melobasis occidentalis   Adult images
Melobasis occidentalis, PL0136, on Acacia pycnanatha, SL, 8.3 × 3.1 mm Melobasis occidentalis, PL1700D, on Acacia uncifolia, KI Melobasis occidentalis, PL1700D, on Acacia uncifolia, KI Melobasis occidentalis, PL0136, from Acacia pycnantha, SL, 8.3 × 3.1 mm Melobasis occidentalis, PL1732A, on Acacia uncifolia, SL Melobasis occidentalis, PL1563C, on Acacia uncifolia, KI Melobasis occidentalis, DAY19, from Acacia uncifolia, KI, 7.5 × 2.8 mm Melobasis occidentalis, PL1732B, on Acacia uncifolia, SL Melobasis occidentalis, PL1732B, on Acacia uncifolia, SL Melobasis occidentalis, PL1732B, on Acacia uncifolia, SL Melobasis occidentalis, PL1732A, on Acacia uncifolia Melobasis occidentalis, PL1732A, on Acacia uncifolia, SL Melobasis occidentalis, PL1732A, on Acacia uncifolia, SL Melobasis occidentalis, PL1163, male, from Acacia uncifolia, SL, 7.6 × 2.6 mm Melobasis occidentalis, PL1563A, on Acacia uncifolia, KI Melobasis occidentalis, PL0136, on Acacia pycnanatha, SL, 8.3 × 3.1 mm
Actual
size¹:
8.1 mm
×
2.9 mm
Measurements (mm)
malefemale
L17.4
6.85 – 7.95
n = 79.0
7.55 – 9.8
n = 5
L26.9
6.7 – 7.1
n = 28.7
7.4 – 9.55
n = 3
W2.6
2.4 – 2.8
n = 73.2
2.8 – 3.4
n = 5
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
Notes

A species extending from Western Australia and which reaches is eastern limit in SA. More common in coastal areas and on southern Kangaroo Island.

Distribution
SA Regions¹:  EPYPSLKISE
Australian States:  WASA
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 Melobasis occidentalis  (total of 74 beetles)
1
2 2 1
15 2 4 10
1 8 1 4
2 8 11 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 plants
beetles sites SA regions¹ family position on host plant
Acacia uncifolia265SL, KIF
Acacia sp.166EP, SL, KIF
Acacia pycnantha93SL, KIF
Acacia provincialis42KIF
Acacia longifolia ssp. sophorae32SL, SEF
Callitris gracilis31KIC
Acacia leiophylla21KIF
Acacia euthycarpa11SLF
Acacia myrtifolia11SLF
Acacia paradoxa11KIF
Acacia triquetra11KIF
Choretrum glomeratum11KIS1
Hakea cycloptera11EPP
Leucopogon parviflorus11KIE
Leucopogon sp.11YPE
Melaleuca lanceolata11KIM
Melaleuca sp.11YPM
Myoporum insulare11SLS2
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 64 86% 9
C Cupressaceae 3 4% 1
E Ericaceae 2 3% 1
M Myrtaceae 2 3% 1
P Proteaceae 1 1% 1
S1 Santalaceae 1 1% 1
S2 Scrophulariaceae 1 1% 1
Position on adult host
positionbeetlessites
on flower(s)62
on flowering plant207
on foliage or non-flowering plant227
on plant (unspecified)2612
Larval host plant
individuals sites SA regions¹ family adult dead
*Acacia notabilis11SL1
Legendindividualscount of breeding adults, pupae and larvae
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)
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
Position in larval host
positionindividualssitesadult dead
dead stem111
Host plant notes

I extracted the remains of a dead adult (PL3023) from a dead branch on a senescent cultivated shrub of Notable Wattle Acacia notabilis at Urrbrae.

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.