Buprestidae of South Australia
( Jewel beetles )
by Peter J. Lang
Castiarina nullarborica   Barker, 1996
subfamily  Buprestinae » tribe  Stigmoderini » subtribe  Stigmoderina
Castiarina  species group: sexplagiata
Castiarina nullarborica   Adult images
Castiarina nullarborica, MAH 15032, on Nitraria billardierei, (iNat-100812747), EP, photo by Mark Hura Castiarina nullarborica, SAMA 25-50505, male, from Myoporum platycarpum ssp. platycarpum, NU, 10.7 × 3.9 mm Castiarina nullarborica, SAMA 25-50506, male, from Myoporum platycarpum ssp. platycarpum, 9.5 × 3.4 mm Castiarina nullarborica, SAMA 25-50507, female, from Myoporum platycarpum ssp. platycarpum, NU, 10.2 × 3.8 mm Castiarina nullarborica, SAMA 25-50508, male, from Eremophila scoparia, 9.1 × 3.4 mm Castiarina nullarborica, SAMA 25-50501, female, from Eucalyptus yalatensis, EP, 11.0 × 4.2 mm Castiarina nullarborica, MAH 15032, from Nitraria billardierei, EP, photo by Mark Hura
Actual
size¹:
10.0 mm
×
3.7 mm
Measurements (mm)
malefemale
L19.2
7.8 – 10.7
n = 410.8
10.2 – 11
n = 4
L28.9
7.5 – 10.3
n = 410.4
9.8 – 10.7
n = 4
W3.3
2.65 – 3.9
n = 44.1
3.8 – 4.4
n = 4
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 nullarborica  Distinctive features

Elytra yellow with red lateral margin (Barker 2006a), approaching the colouration of C. sexplagiata from eastern Australia.

Notes

Until October 2021 this species was known in SA only from the allotype specimen with the general location 'Nullarbor Plain' and the 1984 paratype by M.Powell 32 km E of Eucla, (only c. 20 km into SA from the WA border).

It was noted on these pages, however, that there were specimens which approached this species to some degree amongst problematic material formerly assigned to C. vanderwoudeae from the Flinders Ranges and nearby areas. Some of these have a suggestion of the two-toned elytral background, being somewhat yellow-orange medially with the margins a more reddish dirty orange. These may represent intergrades with C. nullarborica, but they also have similarities with other species in the C. sexplagiata group, and are treated here as a separate entity, C. sp. Flinders Ranges (q.v.).

In late October 2021 Mark Hura collected five individuals of C. nullarborica in SA well to the east of the Nullarbor Plain at Wandilla Beach, 16km W by S from Fowler’s Bay. Soon after, in late November and early December 2021, six specimens were collected more widely in the same region by Ben Parslow et al. on the Fowler's Bay-Yalata Bush Blitz survey.

Distribution
SA Regions¹:  NUEP
Australian States:  WASA
South Australian occurrences
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 nullarborica  (total of 19 beetles)
12
2
4 1
Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr May Jun
Legend
live emerged adults, count > median value of 4 per quarter month
live emerged adults, count <= median value of 4
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
121EPN
31NUS
21EPM
11NUS
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 names in green are hyperlinked to a matching host species page with plant photos.
Plant family
Code beetles % host plant taxa
N Nitrariaceae 12 67% 1
S Scrophulariaceae 4 22% 2
M Myrtaceae 2 11% 1
Position on adult host
positionbeetlessites
on flower(s)121
on flowering plant63
Host plant notes

A single paratype specimen from the same locality as the holotype (5 km E of Eucla, WA) is recorded as being from "Eucalyptus sp.". The recent collections come mostly from white flowered hosts, including Sugarwood (Myoporum platycarpum), but one is from the violet flowered Scotia Bush (Eremophila scoparia). Both these species were formerly classified in family Myoporaceae, and are now included in a broader Scrophulariaceae, but there are insufficient records from the family to establish a clear association. There is evidence of such an association though in two other SA species of the Castiarina sexplagiata group: C. erythroptera is found largely on M. platycarpum in SA; and C. vanderwoudeae is found almost exclusively on E. 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.