Buprestidae of South Australia
( Jewel beetles )
by Peter J. Lang
Castiarina keyzeri   Barker, 2005
subfamily  Buprestinae » tribe  Stigmoderini » subtribe  Stigmoderina
Castiarina  species group: sexplagiata
Castiarina keyzeri   Adult images
Castiarina keyzeri, PL2813A, male, MU, 10.8 × 3.9 mm Castiarina keyzeri, PL2813A, male, MU, 10.8 × 3.9 mm Castiarina keyzeri, PL2813B, male, MU, 9.9 × 3.4 mm Castiarina keyzeri, PL2813A, PL2813B, male, from Grevillea pterosperma, MU Castiarina keyzeri, PL2813B, male, MU, 9.9 × 3.4 mm Castiarina keyzeri, PL2813B, male, MU, 9.9 × 3.4 mm Castiarina keyzeri, PL2813B, male, MU, 9.9 × 3.4 mm Castiarina keyzeri, PL2813B, male, MU, 9.9 × 3.4 mm Castiarina keyzeri, PL2813A, male, MU, 10.8 × 3.9 mm Castiarina keyzeri, PL3313, female, SE, 11.9 × 4.3 mm Castiarina keyzeri, PL3313, female, SE, 11.9 × 4.3 mm Castiarina keyzeri, PL3313, female, SE, 11.9 × 4.3 mm Castiarina keyzeri, PL3313, female, SE, 11.9 × 4.3 mm
Actual
size¹:
10.7 mm
×
3.9 mm
Measurements (mm)
malefemale
L110.5
9.8 – 11.45
n = 611.9
n = 1
L210.2
9.4 – 11.1
n = 611.5
n = 1
W3.8
3.35 – 4.25
n = 64.3
n = 1
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 keyzeri  Distinctive features

According to the protologue: elytra orange with premedial dark markings reduced to a sutural spot (+/- a small spot over the humeral callus on each side); coppery coloration elsewhere with widespread blue reflections; (also the characteristic features of the C. sexplagiata group such as reduction in tarsal pads and the triangular aedeagus).

Notes

This species was described by Barker 2005 based on three specimens collected by Sundholm, Scott and de Keyzer from Grevillea pterosperma flowers in the Great Victoria Desert, on Goog Track N of Ceduna.

Virtually identical specimens to those of the type collection, with orange elytra and reduced fasciae, have now been collected from the MU Region (Murray Mallee) and northern SE Regions. However, there are also some that show evidence of intergradation towards larger forms with red elytra and complete (or largely complete) fasciae, traits which have been considered to characterise C. piliventris in SA.

There is some question as to whether C. keyzeri should be treated as a different to Castiarina piliventris (Saunders, 1868), at least at species level. In the protologue of C. piliventris Saunders 1868b does describe the elytra as red, however, he states that the pre-medial mark is reduced to 'a triangular spot on the suture' (as in C. keyzeri). In the account of Barker 2006a the elytra are still given as red, but the premedial fascia is described as entire or only partly reduced ('may be broken into three spots, one on each elytron and on suture'), and the illustration shows an individual with an entire premedial fascia.

For C. piliventris, Saunders states 'Hab.: Queensland', implying type material from eastern Australia, but according to the AFD there are also syntypes from Adelaide. Eastern Australian specimens referred to C. piliventris in a private collection have the elytra variable in colour from red and orange to almost yellow, in various combinations with their fasciae ranging from complete to interrupted or much reduced. There is also much variation in overall size, and in colouration of the scutellum, pronotum and other parts with bronze to blue reflections.

Barker 2005 compared his new species to C. vanderwoudeae, but the main difficulty, however, is in separating it from C. piliventris.

Distribution
SA Regions¹:  EPMUSE
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 keyzeri  (total of 7 beetles)
1 1
5
Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr May Jun
Legend
live emerged adults, count > median value of 1 per quarter month
live emerged adults, count <= median value of 1
live non-emerged adults only, for that quarter month
12
number of active beetles for that quarter month
Lure affinity
colour beetles sites SA regions¹
blue11SE
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.