A dorsal view of a pinned darkling beetle specimen with black body/appendages, punctate pronotum and striate elytra

A ventral view of a pinned darkling beetle specimen with black and red-tinted body, black appendages, and tufts of golden setae on tarsi

Back from an unintended break — for this #TenebTuesday here's very typical (looking) #tenebrionid — Bouchardandrus concolor (LeConte, 1866), only species in the genus & only known to from the Great Lakes region of Canada (MB ON QC) & US (MI MN OH WI) (Steiner 2016, Bousquet et al. 2018)

A brown beetle with ridged elytra and tuberculate pronotum sitting on light orange sand

On this #TenebTuesday an excellent #tenebrionid — a species of Trogloderus (Blaptinae: Amphidorini) — the nine distinctively sculptured species are restricted to sandy areas & dunes in the western United States.

A dorsal view of double-mounted (pinned) specimen of a beetle with an orange head and pronotum and elytra covered in light/off-grey setae that form patterns

A lateral view of double-mounted (pinned) specimen of a beetle with an orange head and pronotum and elytra covered in light/off-grey setae that form patterns

For this #TenebTuesday a deceptive #tenebrionid — Nilio (Linio) lanatus Germar, 1824 from Bahia, Brazil. Nilio adults & larvae (& sometimes aggregations of either or both stages!) can be found on trunks & branches of trees, where they have been observed feeding on fungus & lichens #Coletopera

A view of the head and pronotum of large blue beetle specimen

A top-down view of a large blue beetle specimen with wrinkled elytra

It's #TenebTuesday! This large (>2 cm), intricately sculptured #tenebrionid from Malawi is Catamerus revoili Fairmaire, 1887 (Lagriinae: Pycnocerini)—the 19 Pycnocerini genera are largely found in tropical Africa, w/ 3 in the Philippines, Indonesia, & Malaysia (Schawaller 2003)

A elongate oval beetle on a white sheet

A line drawing showing the distinctively-shaped head of Polemiotus submetallicus

For a belated #TenebTuesday — this is Polemiotus submetallicus (LeConte, 1854) [Pimeliinae: Epitragini] from a light sheet in Arizona this summer. The only species in the genus, this large, elongate, flighted #tenebrionid is found in Arizona & nw Mexico & recognizable by its distinctive head shape!

A flattened, elongate oval darkling beetle on a white background

A wonderfully weird #tenebrionid for this #TenebTuesday—Cossyphus sp. (Lagriinae: Cossyphini)—found in the Omusati Region, Namibia—distinctively flattened, but a surprisingly quick runner! #Coleoptera

A small black beetle, with its short antennae extended, perched on a clump of sand grains

A tiny, troublesome (to identify) #tenebrionid for this #TenebTuesday: Cheirodes californicus (Horn, 1870) (Tenebrioninae: Melanimonini), the only species of Melanimonini from the U.S., found in western deserts. The genus has quite an aphodiine scarab gestalt!

A flattened, circular white/tan-colored beetle on a sandy background

It's #TenebTuesday! This is Lepidochora eberlanzi parva Koch, 1958 (Pimeliinae: Adelostomini) an "ultrapsammophilous" dune-dwelling #tenebrionid I photographed in Namibia. Adults dig tiny trenches in the sand, perpendicular to the wind + fog, to collect water droplets!