male | ||||||
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L1 | 6.6 | n = 1 | ||||
L2 | 6.5 | n = 1 | ||||
W | 2.4 | n = 1 |
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 |
Distinguished by its bronze-coppery colouration dorsally and by the non-hairy, metallic, subtriangular patches on the outer part of abdominal sternites, conspicuous in lateral view. Also by the pronotum sides having a distinct 'short arcuate pre-lateral carina' extending from the latero-basal angles to before the middle, plus a marginal carina extending almost to the apex.
This species has only recently been recorded for SA. In August 2022 I re-determined as M. intermedium an old Tepper collection from Ardrossan on Yorke Peninsula that was cited by Bellamy 1988 as a paratype of M. cylindricolle and labelled by him accordingly. Although the specimen is missing its abdomen, the sides of the pronotum have the distinct pre-lateral and lateral carinae that are diagnostic for this species.
In December 2023, A.M.P. Stolarski collected a live specimen from east of Lucindale in the SE Region of SA.
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 | 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 |
Bellamy 1988 cited G. Willams who reported collecting M. intermedium adults feeding on stems of Juncus in areas subject to seasonal tidal inundations, and suggested that larvae might feed in the root crown, as the stems were too narrow to accommodate them.
The single individual from the SE Region of SA was collected by sweeping both a Rush (Juncus sp., family Juncaceae) and Knobby Club-sedge (Ficinia nodosa, family Cyperaceae), making the actual adult host here uncertain.
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. |