Buprestidae of South Australia
( Jewel beetles )
by Peter J. Lang
Castiarina vanderwoudeae   (Barker, 1987)
subfamily  Buprestinae » tribe  Stigmoderini » subtribe  Stigmoderina
Castiarina  species group: sexplagiata
Castiarina vanderwoudeae   Adult images
Castiarina vanderwoudeae, PL0168B, female, on Eremophila scoparia, EP, 11.3 × 4.3 mm Castiarina vanderwoudeae, PL0168A, female, on Eremophila scoparia, EP, 9.2 × 3.6 mm Castiarina vanderwoudeae, PL0168B, PL0168A, female, EP Castiarina vanderwoudeae, PL0848A, PL0848B, on Eremophila scoparia, EP Castiarina vanderwoudeae, PL0848A, PL0848B, on Eremophila scoparia, EP Castiarina vanderwoudeae, PL0168A, female, on Eremophila scoparia, EP, 9.2 × 3.6 mm Castiarina vanderwoudeae, PL0168A, female, on Eremophila scoparia, EP, 9.2 × 3.6 mm Castiarina vanderwoudeae, PL0168A, female, from Eremophila scoparia, EP, 9.2 × 3.6 mm Castiarina vanderwoudeae, PL0168A, PL0168B, female, on Eremophila scoparia, EP Castiarina vanderwoudeae, PL0168B, female, on Eremophila scoparia, EP, 11.3 × 4.3 mm Castiarina vanderwoudeae, PL0168B, female, on Eremophila scoparia, EP, 11.3 × 4.3 mm
Actual
size¹:
9.6 mm
×
3.6 mm
Measurements (mm)
malefemale
L18.9
7.6 – 9.65
n = 510.0
9.2 – 11.3
n = 9
L29.1
8.7 – 9.5
n = 29.8
9.1 – 10.5
n = 7
W3.3
2.85 – 3.6
n = 53.8
3.35 – 4.3
n = 9
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
Castiarina vanderwoudeae  Distinctive features

Apart from the distinctive features of the C. sexplagiata group (including reduction in tarsal pads and the triangular aedeagus) it has the elytra heavily marked on a yellow to orange background. Often slightly smaller, narrower, and relatively thicker (less flattened) than many of the related species in the C. sexplagiata group. Although not exclusive to this species, the scutellum is usually violet, matching the flower colour its principal adult host plant.

Notes

Particularly common on eastern Eyre Peninsula.

Problematic forms from the FR Region, including the southern Flinders Ranges area in the far northeast of EP Region, have the appearance of intergrades with other members of the C. sexplagiata group, namely C. piliventris or even C. nullaborica. They have been found on different hosts with cream to white flowers (Eucalyptus and Bursaria) and are treated here as a separate entity, C. sp. Flinders Ranges, q.v..

This species is often found together with the similar looking Castiarina browningi, a member of the C. decemmaculata species group of Barker, 2006a. It appears that these separate groups, both of which are predominantly made up of species associated with cream to white flowered hosts, have each evolved a species attracted and adapted to the flowers of Eremophila scoparia (Broom Emubush). The two species have almost identical colouration dorsally, plus broadly similar morphology and size, coupled with their host specificity. They provide a good example of convergent, or at least parallel, evolution.

With the current (and likely past) overlap in ranges, Mullerian mimicry may be a driver of this convergence, at least in part. Mimicry, both Batesian and Mullerian, is well represented and developed in the genus Castiarina, with many large mimicry groups recognised (Barker, 2006a, p.25-33). Castiarina browningi most resembles its close relatives C. rediviva and C. cretata, but differs from SA collections assigned to those species in having narrower pale margins on the pronotum dorsally and overall a greater area of dark colouration on the ventral side, both features that enhance its resemblance to C. vanderwoudeae.

Distribution
SA Regions¹:  FREPMU
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 Castiarina vanderwoudeae  (total of 93 beetles)
10 5 58
11 9
Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr May Jun
Legend
live emerged adults, count > median value of 10 per quarter month
live emerged adults, count <= median value of 10
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
Eremophila scoparia8715EP, MUS
Myoporum platycarpum53MUS
Leptospermum coriaceum11EPM
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
S Scrophulariaceae 92 99% 2
M Myrtaceae 1 1% 1
Position on adult host
positionbeetlessites
on flower(s)4814
on flowering plant187
on foliage or non-flowering plant11
on plant (unspecified)263
Lure affinity
colour beetles sites SA regions¹
blue51EP
Host plant notes

Within its main area of occurrence on Eyre Peninsula, at least, adult beetles have been recorded exclusively from the violet to mauve coloured flowers of Broom Emubush Eremophila scoparia.

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.