Buprestidae of South Australia
( Jewel beetles )
by Peter J. Lang
Castiarina crockerae   (Barker, 1979)
subfamily  Buprestinae » tribe  Stigmoderini » subtribe  Stigmoderina
Castiarina  species group: testacea
Castiarina crockerae   Adult images
Castiarina crockerae, PL3564, male, on Eucalyptus leptophylla, EP, 9.2 × 3.3 mm Castiarina crockerae, PL4322, female, on Eucalyptus socialis ssp. socialis, EP, 7.9 × 3.0 mm Castiarina crockerae, PL3564, male, EP, 9.2 × 3.3 mm Castiarina crockerae, PL1356, female, EP, 8.0 × 3.1 mm Castiarina crockerae, PL1356, female, on Eucalyptus leptophylla, EP, 8.0 × 3.1 mm Castiarina crockerae, PL3564, male, on Eucalyptus leptophylla, (at rear), EP, 9.2 × 3.3 mm
Actual
size¹:
8.4 mm
×
3.1 mm
Measurements (mm)
malefemale
L19.2
n = 17.9
7.85 – 8
n = 2
L28.8
n = 17.7
n = 1
W3.3
n = 13.0
3 – 3.05
n = 2
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 crockerae  Distinctive features

A small brownish-yellow summer-emerging species with an unusual fleckered patterning on its elytra. Similar to C. subtestacea but has the head and pronotum mottled red-brown. Close also to C. testacea but lacking the more pronounced ribs on the elytra which distinguish that species.

Notes

This species and its allies are believed to be a 'bud mimics'. The imitation applies particularly well for the Narrow-leaf Mallee, Eucalyptus leptophylla, which is the principal adult host species for summer flower-feeding Buprestids in SA. With its head down and out of sight while feeding on nectar in the centre of flowers, the projecting abdomen and elytra resemble an unopened bud.

Barker 1983 notes that he originally included specimens of the similar C. subtestacea under C. crockerae. On the other hand, SA specimens from Eyre Peninsula had been incorrectly identified as C. subtestacea for many years until Magnus Peterson (pers. comm. Jul. 2020) pointed out that those illustrated here are actually C. crockerae.

Some SA specimens have a sub-medial brown spot on the elytra, although this feature was only mentioned by Barker 2006a for C. testacea. These specimens, however, lack the more pronounced elytral ribbing and paler pronotum of the latter. Castiarina crockerae, C. subtestacea and C. testacea appear to intergrade and Barker 1983 comments that they 'seem to be members of a ring species complex'.

Distribution
SA Regions¹:  EP
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 Castiarina crockerae  (total of 7 beetles)
1
3
2 1
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
Eucalyptus leptophylla32EPM
Eucalyptus socialis31EPM
Eucalyptus socialis ssp. socialis11EPM
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
M Myrtaceae 7 100% 3
Position on adult host
positionbeetlessites
on flower(s)11
on flowering plant62
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.