male | female | |||||
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L1 | 11.2 | 11.05 – 11.25 | n = 3 | 9.3 | 8.2 – 10.8 | n = 3 |
L2 | 11.0 | 10.9 – 11.15 | n = 3 | 9.2 | 8.05 – 10.65 | n = 3 |
W | 4.5 | 4.3 – 4.65 | n = 3 | 4.0 | 3.55 – 4.5 | n = 3 |
Legend | L1 | length from clypeus/frons to elytral apex (mean, range, sample size) |
L2 | length from anterior of edge of eyes to elytral apex | |
W | maximum width with elytra fully closed |
Smaller and lighter in colour than C. saundersii. Frons relatively plain and of even relief, covered by regularly spaced puncturation; inner margins of eyes in frontal view only weakly diverging towards the base (ventral side) or becoming parallel. Sides of pronotum weakly bidentate, gently bilobed, or shallowly and broadly notched, similar to that of C. caelatus but without strong rugosities. Some resemblance to C. amplicollis but pronotum sides not straight and generally widest in posterior rather than in anterior, flange on fore-tibia less developed, and head lacking a strong impression on vertex of frons. Area around junction of meso- and meta-sternal plates not differentiated in colour but bronze like rest of ventral side (unlike C. amplicollis, C. saundersii and C. subsimilis where it is sharply demarcated and pale yellowish, at least when young). Apical abdominal ventrite without median carina in male (and sometimes in female), its apex weakly bidentate with shallow concave incision in male and weakly convex profile in female.
Widespread in SA, but sparsely collected. Records include four dead salt lake specimens from eastern Eyre Peninsula collected by P. Hudson in 1999, and six reared adults from western Eyre Peninsula.
Legend | P.J.Lang collection vouchered records | |
other private collection or museum specimens, or sightings |
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Jul | Aug | Sep | Oct | Nov | Dec | Jan | Feb | Mar | Apr | May | Jun |
Legend | ||
9 | number of active beetles, actually recorded in that quarter-month | |
actual count > 1.5 (mean) | ||
actual count <= 1.5 (mean) | ||
live non-emerged (inactive) beetles only |
records | sites | SA regions¹ | family | adult ex billet | adult ex pupa | pupa | pupa ex larva | larva | |
Westringia rigida | 24 | 2 | EP | L | 4 | 2 | 1 | 1 | 16 |
Legend | records | count of breeding adults, pupae and larvae |
sites | count of major sites (unique 10 km grid cells +/- some distinct approximate localities) | |
adult | live = 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 | |
pupa | extracted pupa; pupa ex larva = reared pupa from larva | |
larva | extracted larva (any stage including prepupa) | |
gall (only) | hatched or unhatched gall identified by form and position rather than contents | |
Plant names in green are hyperlinked to a matching host species page with plant photos. |
Code | records | % | host plant taxa | |
L | Lamiaceae | 24 | 100% | 1 |
position | records | sites | adult ex billet | adult ex pupa | pupa | pupa ex larva | larva | |
root | 1 | 1 | 1 | |||||
root gall | 21 | 1 | 4 | 2 | 1 | 14 | ||
root crown | 2 | 2 | 1 | 1 |
Discovered breeding in Stiff Westringia Westringia rigida on western Eyre Peninsula by A. Stolarski and me in November 2022. Records of 14 larvae, a pupa and six adults were obtained from two sites three km apart, and, at another site 59 km away, a matching larva was found in the same host species. The larvae were found in the tap root, mostly within gall-like swellings which were hollowed out and largely filled with frass.
Chrysobothris larvae obtained from Slender Westringia Westringia eremicola root crowns in the upper SE and central EP Regions are possibly the same species. However, it is clear that plants of other genera must also be used as larval hosts, because an individual specimen of C. sp. Bidentate pronotum that I collected as a dead specimen in the far north-east of SA falls well outside the range of the three Westringia species found in this State.
¹ Legend | regions | SA 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 |
size | The ellipse is the correct size when printed, indicative on a desktop screen, and likely to be wrong on a mobile device. |